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Hytera MD78X, Service Manual

The Hytera MD78X is a cutting-edge digital mobile radio that offers reliable communication for professionals. For in-depth maintenance and troubleshooting, make sure to download the free Service Manual from manualshive.com. This comprehensive manual will provide you with all the information you need to keep your device functioning at its best.

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Parts List 

UHF3  (350

–

400  MHz) 

 

94 

 

No. 

Ref 
No. 

Print 

No. 

Part No. 

Description 

 

No. 

Ref 
No. 

Print 

No. 

Part No. 

Description 

260  C430  T2A 

3101051010030    100pF 

 

1037  R262  B5B 

3001051040010    100

kΩ

 

261  C431  T2A 

3101051010030    100pF 

 

1038  R263  B5B 

3001053030010    30

kΩ

 

262  C432  T2B 

3101052210010    220pF 

 

1039  R264  B5D 

3001051020010    1

kΩ

 

263  C433  T2B 

3101052210010    220pF 

 

1040  R265  B4B 

3001051820000    1.8

kΩ

 

264  C434  T2B 

3101052210010    220pF 

 

1041  R266  B4B 

3001054730000    47

kΩ

 

265  C435  B8D 

3101051010030    100pF 

 

1042  R267  B5D 

3001051020010    1

kΩ

 

266  C436  T2C 

3101052210010    220pF 

 

1043  R268  B5B 

3001051040010    100

kΩ

 

267  C437  T2B 

3101052210010    220pF 

 

1044  R269  B4B 

3001051040010    100

kΩ

 

268  C438  B7C 

3101054740020    0.47uF 

 

1045  R270  B4B 

3001054730000    47

kΩ

 

269  C439  B7C 

3101054740020    0.47uF 

 

1046  R271  B4B 

3001051010000    1

00Ω

 

270  C440  B8D 

3101051010030    100pF 

 

1047  R272  B5B 

3001054730000    47

kΩ

 

271  C441  T8C 

3101051010030    100pF 

 

1048  R273  B4C 

3001052430010    24

kΩ

 

272  C442  B8B 

3101051010030    100pF 

 

1049  R274  B4C 

3001051040010    100

kΩ

 

273  C443  B8B 

3101051010030    100pF 

 

1050  R275  B4C 

3001051040010    100

kΩ

 

274  C444  B8A 

3101051010030    100pF 

 

1051  R276  B4C 

3001051040010    100

kΩ

 

275  C445  B8B 

3101051010030    100pF 

 

1052  R277  B4C 

3001054730000    47

kΩ

 

276  C446  B8A 

3101051010030    100pF 

 

1053  R278  B4C 

3001051010000   

100Ω

 

277  C447  B8B 

3101051010030    100pF 

 

1054  R279  B5D 

3001053030010    30

kΩ

 

278  C448  B8A 

3101051010030    100pF 

 

1055  R282  T6A 

3001060000000   

0Ω

 

279  C449  B8A 

3101051010030    100pF 

 

1056  R283  B5D 

3001053030010    30

kΩ

 

280  C450  B8A 

3101051010030    100pF 

 

1057  R284  B5D 

3001051530000    15

kΩ

 

281  C451  B8A 

3101051010030    100pF 

 

1058  R285  B5D 

3001051530000    15

kΩ

 

282  C452  B8B 

3101051010030    100pF 

 

1059  R286  B6B 

3001054730000    47

kΩ

 

283  C453  B8B 

3101051010030    100pF 

 

1060  R287  B6B 

3001055620000    5.6

kΩ

 

284  C454  B8B 

3101051010030    100pF 

 

1061  R288  B6A 

3001054730000    47

kΩ

 

285  C455  B8B 

3101051010030    100pF 

 

1062  R289  B6A 

3001050000000   

0Ω

 

286  C456  B8B 

3101051010030    100pF 

 

1063  R290  B5C 

3001051020000    1

kΩ

 

287  C46 

B7G 

3101052210010    220pF 

 

1064  R291  B6B 

3001051220000    1.2

kΩ

 

288  C463  B7C 

3101051010030    100pF 

 

1065  R292  B6B 

3001053300010   

33Ω

 

289  C465  B8C 

3101051010030    100pF 

 

1066  R295  B5A 

3001051020000    1

kΩ

 

290  C466  B8C 

3101051010030    100pF 

 

1067  R296  B6B 

3001051040000    100

kΩ

 

291  C467  B8C 

3101051010030    100pF 

 

1068  R3 

T7F 

3001050000000    0

Ω

 

292  C468  B8C 

3101051010030    100pF 

 

1069  R316  T5B 

3001051030000    10

kΩ

 

293  C469  B8A 

3101051010030    100pF 

 

1070  R319  T6B 

3001053300010   

33Ω

 

294  C473  T8D 

3101051040010    0.1uF 

 

1071  R320  B6B 

3001053300010   

33Ω

 

295  C474  T2C 

3101054710010    470pF 

 

1072  R322  T5B 

3001051030000    10

kΩ

 

296  C476  T2C 

3101054710010    470pF 

 

1073  R324  T7C 

3001053300010   

33Ω

 

297  C477  T7C 

3101051010030    100pF 

 

1074  R326  T6B 

3001051030000    10

kΩ

 

298  C478  T7C 

3101051010030    100pF 

 

1075  R327  B6C 

3001053300010   

33Ω

 

299  C479  T8C 

3101051010030    100pF 

 

1076  R337  T7C 

3001051010000   

100Ω

 

300  C480  T8C 

3101051010030    100pF 

 

1077  R338  T7B 

3001051010000   

100Ω

 

301  C483  B2B 

3101051040010    0.1uF 

 

1078  R339  T7C 

3001051010000   

100Ω

 

302  C484  T2C 

3101062250000    2.2uF 

 

1079  R346  B6C 

3001051010000   

100Ω

 

303  C485  B2C 

3101051040010    0.1uF 

 

1080  R347  T7D 

3001053300010   

33Ω

 

304  C49 

B7G 

3101060700020    7pF 

 

1081  R348  T8B 

3001050000000   

0Ω

 

305  C5 

B7G 

3101053900000    39pF 

 

1082  R349  T8B 

3001053300010   

33Ω

 

306  C50 

T8G 

3101054710010    470pF 

 

1083  R350  T8B 

3001053300010   

33Ω

 

307  C500  B7C 

3101053300000    33pF 

 

1084  R351  T6B 

3001051030000    10

kΩ

 

308  C501  B7C 

3101053310020    330pF 

 

1085  R352  T2C 

3001053300010   

33Ω

 

309  C502  B7C 

3101053320010    3300pF 

 

1086  R353  T6A 

3001051030000    10

kΩ

 

310  C503  B7C 

3101051820000    1800pF 

 

1087  R354  T6C 

3001053300010   

33Ω

 

311  C506  B7C 

3101051030020    0.01uF 

 

1088  R355  B6C 

3001053300010   

33Ω

 

312  C507  B7C 

3101051030020    0.01uF 

 

1089  R356  B6A 

3001050000000   

0Ω

 

313  c508 

B7C 

3101071060010    10uF 

 

1090  R357  T6C 

3001053300010   

33Ω

 

314  C509  B7C 

3101051040010    0.1uF 

 

1091  R358  B7B 

3001051000000   

10Ω

 

315  C510  B7C 

3101051010030    100pF 

 

1092  R360  B7B 

3001051000000   

10Ω

 

316  C511  B7B 

3101071060010    10uF 

 

1093  R361  B7B 

3001051530000    15

kΩ

 

317  C512  B7B 

3101051040010    0.1uF 

 

1094  R362  B7B 

3001051530000    15

kΩ

 

318  C513  B7C 

3101051020010    1000pF 

 

1095  R363  T3A 

3001050000000   

0Ω

 

319  C514  B7C 

3101051040010    0.1uF 

 

1096  R364  T3A 

3001050000000   

0Ω

 

320  C515  B7C 

3101051040010    0.1uF 

 

1097  R365  T3C 

3001051030000    10

kΩ

 

321  C516  B7B 

3101051010030    100pF 

 

1098  R366  T3C 

3001051030000    10

kΩ

 

322  C517  B7B 

3101051010030    100pF 

 

1099  R367  T6D 

3001053300010   

33Ω

 

Summary of Contents for MD78X

Page 1: ...DIGITAL MOBILE RADIO SERVICE MANUAL...

Page 2: ...ly To repair the product properly please read this manual carefully before repairing This manual is applicable to the following product MD78X Digital Mobile Radio X may indicate 2 5 6 or 8 MD78XG Digi...

Page 3: ...roperty rights including patent rights copyrights and trade secrets of Digital Voice Systems Inc This voice coding technology is licensed solely for use within this product The user of this technology...

Page 4: ...r even death Notation Conventions Notation Description The quotation marks enclose the name of a software interface element For example click OK Bold The text in boldface denotes the name of a hardwar...

Page 5: ...UHF1 400 470 MHz...

Page 6: ...14 5 2 2 Control Module 15 5 2 3 Audio Module 21 5 2 4 PCB Difference 22 5 3 RF Section 23 5 3 1 Transmitter Circuit 23 5 3 2 Receiver Circuit 26 5 3 3 FGU Circuit 27 5 4 GPS Circuit Section 29 6 Tro...

Page 7: ...Contents UHF1 400 470 MHz ii 9 PCB View 55 10 Block Diagram 59 11 Schematic Diagram 62 12 Parts List 76 12 1 Front Panel 76 12 2 GPS Circuit 77 12 3 Main Board 25 W 77 12 4 Main Board 45 W 90...

Page 8: ...Key 11 Redial Answer Call Key 5 Back Group Call Management Key 12 Programmable Keys 6 Dial back End Home Screen Key 13 Microphone Connector 7 Power On Off Key 14 Microphone Installation Index Note The...

Page 9: ...Controls UHF1 400 470 MHz 2 Rear Panel No Part Name No Part Name 1 RF Antenna Connector 3 Accessory Connector 2 Power Inlet 4 GPS Antenna Connector Note The GPS antenna interface is only available for...

Page 10: ...wer cord and loosen the two screws to remove the radio Step 2 Remove the antenna Step 3 Loosen the three screws to remove the front panel Then remove the FFC Step 4 Detach the volume control knob and...

Page 11: ...en the eleven screws to remove the upper shield cover Step 7 Loosen the screw fixing the antenna connector and two screws fixing the PA module Then take the PCB out 2 2 Reassembling the Radio To reass...

Page 12: ...cable 1 30 6100533101000 Waterproof ring for aluminum chassis 1 5 5208010100010 Connector male 1 31 6300126000000 Upper cover of the aluminum chassis 1 6 6001079000000 Light guide plate for keys 1 32...

Page 13: ...male 1 18 6201739000000 Inner lining for knob 1 44 3103994770150 Electrolytic capacitor 1 19 6000876000000 Encoder knob 1 45 7212002500000 Nut 1 20 6100493000000 Power on off key 1 46 6100531100000 Wa...

Page 14: ...UHF1 400 470 MHz Exploded View and Packing Guide 7 3 2 Packing Guide...

Page 15: ...rrent Drain Standby 0 6 A Receive 2 0 A Transmit 5 W 5 A 25 W 8 A 45 W 12 A Frequency Stability 1 5 ppm Antenna Impedance 50 Dimensions H W D 60 mm 174 mm 200 mm 2 4 inch 6 9 inch 7 9 inch Weight 1 7...

Page 16: ...o Distortion 3 Digital Vocoder Type AMBE or SELP Digital Protocol ETSI TS102 361 1 2 3 Receiver Sensitivity Analog 0 3 V 12 dB SINAD 0 22 V Typical 12 dB SINAD 0 4 V 20 dB SINAD Digital 0 3 V BER5 Adj...

Page 17: ...urious Emission 57 dBm Environment Operating Temperature 30 to 60 Storage Temperature 40 to 85 ESD IEC 61000 4 2 level4 8 kV contact 15 kV air American Military Standard MIL STD 810 C D E F G Dust Wat...

Page 18: ...Hot Start 10s Horizontal Accuracy 10 m Note All Specifications are tested according to applicable standards and subject to change without notice due to continuous development 4 2 Blind Spot No Blind...

Page 19: ...ATA U231 5VD SPK SPK GPIO GPIO GPIO McBSP FILTER USB DP USB DM FLASH D p1 P5 C2 P4 Switch P3 Menu C1 Back P2 Down C0 R2 R1 R0 Keys Matrix FLASH A1 FLASH WE FLASH OE RS A B S UART2 GPIO EMER P6 C3 C4 U...

Page 20: ...s fed to the serial to parallel converter IC U1 and then is output by U302 RX status is indicated by green LED and TX status by red LED Backlight is activated upon any key press The red and green LEDs...

Page 21: ...U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto baterry Voltage 13 6 15 9V3A 9V1A 9V1A 5VA 4V3A 3V3A 5VA 3V3A 1V6D 5VD 3V3D 1V8D 3V3DP 3V3A 5VA 5VA Both the baseba...

Page 22: ...l signal PWB to power off the radio is detected by U302 which then controls PWR_CTRL to output low level Afterwards the radio becomes powered off Ignition Sense The mobile radio can be turned on when...

Page 23: ...are completed Clock Option Board U231 U302 32 768KHz 32K 32K_IN VSS CLK32K_IN APLL 19 2MHz 9 6MHz DAC U100 19 2MHz U701 19 2MHz Input Clock The 32K clock provided by X375 is mainly used for timing an...

Page 24: ...external devices at most generally transmitting control and status messages of external devices and reading data from ROM Its maximum clock frequency is a quarter of system clock frequency In this ca...

Page 25: ...interfaces including MCBSP1 MCBSP2 and MCBSP3 which are compatible with various interfaces MCBSP1 is connected to the interface I2C of audio processor U231 to realize two way transmission of digital...

Page 26: ...on with GPS module UART2 is used for communication with front panel GPIO17 and GPIO18 UART3 is used for communication with the Option Board and accessory connector USB Interface USB DM USB PUEN U302 U...

Page 27: ...ESET OUT I O I O I O O O VIH MIN 0 7VDD VIL MAX 0 3VDD VOH MIN 0 8VDD VOL MAX 0 22VDD GPIO5 output signal of resetting the option board GPIO4 GPIO5 Unidirectional output interfaces They require their...

Page 28: ...rd MAX 700mV 19 DGND DGND 20 3V6 or 5V Power O Voltage 5 0 V 5 2 3 Audio Module The audio module is used to output RX audio and input relay audio and TX audio which serves as the RX audio path and TX...

Page 29: ...differential input After 9 3 V is divided by R255 and R264 a bias voltage of about 7 V is provided to the front panel MIC The external MIC is connected to the MIC_HED of the codec U231 as a unidirecti...

Page 30: ...hat U906 generates the reset signal to reset OMAP Version H The audio amplifier is different compared with Version D and Version F Version L The DC DC conversion circuit is optimized GPS pulse and GPS...

Page 31: ...cuit Pre driver Power Amplifier The pre driver power amplifier is formed by Q805 with variable gain controlled by voltage VGG The input matching circuit is composed of C826 L826 L814 C843 and R824 Dri...

Page 32: ...ward power is coupled to the diode D803 and the voltage is applied to the power control circuit U801 Then U801 outputs the voltage VGG for controlling the gate voltage of Q805 and Q804 ensuring a cons...

Page 33: ...4 Q6105 U701 IF IC IF Processor U302 OMAP 19 2MHz 18M 71 1M RX_LO 326 65 396 65MHz TV Attenuator 1dB Attenuator Control 10dB Tx Rx Switch Low pass Filter Receiver Front end RF signals feed to the low...

Page 34: ...e second LO signal The clock frequency is 18 MHz which is generated by the external LC D702 L715 and C745 resonance loop DSP U302 acquires the audio signal from IF IC Then this signal goes through U30...

Page 35: ...nto the PLL IC U100 for frequency division generating the reference frequency Meanwhile the frequency generated by VCO goes into PLL IC U100 for frequency division The resulting frequency will be comp...

Page 36: ...5 4 GPS Circuit Section GPS module U302 UART GPS Antenna LCD Power REB 1315LPx GPS data can be acquired via the programmable GPS key on the front panel of the mobile radio The GPS function is realize...

Page 37: ...Check power on circuit and peripheral circuits of U902 Check power on circuit and peripheral circuits of U900 and U901 Yes No Yes No Yes Yes No No Yes Yes No No U903 1V8D is normal 7 U919 1V6D is nor...

Page 38: ...aged No GPS circuit is normal Replace GPS module U326 Yes Replace the active antenna No SiRF Demo software displays communication status on the computer Voltage at SMA of GPS antenna connector is norm...

Page 39: ...Yes Refer to troubleshooting flow chart of FGU circuit No Power of Q801 is normal 4 Yes Check Q801 and relevant components No Power of Q805 is normal 5 Check Q805 and relevant components Yes No Power...

Page 40: ...is about 10 dBm Make sure that the back end circuit is disconnected during test 4 The gain is 16 dB and the input signal is 0 dBm at Q801 5 The gain is 15 dB and the input signal is 0 dBm at Q805 6 Th...

Page 41: ...ck RX VCO and LO amplifier No Check D6106 T6100 T6101 and peripheral circuits Sensitivity at TP6104 is normal 6 Yes Yes Check Q6102 D6103 D6104 and peripheral circuits Check L809 L813 M801 and periphe...

Page 42: ...ally 2 No Replace Q106 Q110 Q100 and Q103 Yes Check D107 D108 D109 D110 D121 D122 D125 and D126 No TP124 CV is normal 4 Yes PLL U100 is normal 5 Yes No Replace PLL U100 No Check U101 U102 R187 and R17...

Page 43: ...The emitter voltage of Q106 Q110 Q100 and Q103 is about 1 8 V 4 The CV of TP124 ranges from 0 5 V to 4 5 V 5 PLL U100 is supplied by 5 V and 3 3 V normally 6 The power of the signal from TP109 to PLL...

Page 44: ...le below for detailed function definitions 2 PTT input Digital input 3 3 V CMOS PTT input for the palm microphone which is valid at low level 3 External audio output Analog output Load impedance 1 k V...

Page 45: ...microphone is detected or press the key of the palm microphone this pin is used for HOOK function when desktop microphone is detected this pin is used for MONITOR function 10 Accessory identification...

Page 46: ...ar panel is mainly used for accessory connection of mobile radio or compatibility with other interfaces Users can further develop the radio via this interface The figure and definition of each pin is...

Page 47: ...of external MIC The audio path is valid when the external Mic PTT is held down 8 RX Audio Analog signal output Load impedance 1k Vrms 300 mV 10 1 kHz 60 system max deviation Default output is 300 mV...

Page 48: ...t This pin and Pin 13 ACC_IO2 can compose three accessory identification statuses Please refer to the DB26 Accessory Identification Matrix Table below for detailed function definitions 16 PRGM_IN_PTT...

Page 49: ...nput pin for ignition voltage Note When a pin is marked with 5 V TTL level this pin has the pull up function If the pin needs to be set to high level empty this pin DB26 Accessory Identification Matri...

Page 50: ...VCI 2 5 3 3 V adjustable port 4 IOVCC 1 65 3 3 V adjustable I O port 5 FLM Synchronization signal control port 6 CS Chip select signal 7 RS Register select 8 WR Write signal 9 RD Read signal 10 DB0 D...

Page 51: ...ption 1 ACC_IO1 Digital input 2 PTT_IN Digital input 3 External_Audio Analog output 4 USB_D USB data cable 5 GND Ground cable 6 USB_VBUS Power supply 7 MIC_IN Analog input 8 USB_D USB data cable 9 HOO...

Page 52: ...require their input resistances are greater than or equal to 47 k 7 GPIO4 O 9 GPIO5 RESET OUT O 11 UART TX UART O UART 13 UART RX I 15 UART CT S I 17 UART RT S O 2 I2C SDA I2C I O I2C 4 I2C SCL O 6 MC...

Page 53: ...Name Description 1 Vbus USB Power supply 5 V 2 Ground Ground cable 3 GP5_3 Digital input output 4 SW B sense Power supply 5 External Alarm Analog voltage output 6 Power Ground Power supply grounding...

Page 54: ...Sense Analog voltage input J404 Front Panel Interface Pin No Name Description 1 INT_MIC Audio input 2 MIC_GROUND Audio input grounding 3 ACC_IO1 Accessory identification interface 1 4 USB_VBUS USB po...

Page 55: ...KB_C1 19 KB_C2 20 KB_C3 21 B_R0 22 B_R1 23 B_R2 24 CSLED Backlight control IC chip select 25 CLOC Backlight control IC clock 26 DATA Backlight control IC data 27 OE_LCD LCD read enable 28 WE_LCD LCD...

Page 56: ...UHF1 400 470 MHz Interface Definition 49 Pin No Name Description 39 GND Grounding 40 PWB_IN Power On Off signal...

Page 57: ...radio to HP8921 via the antenna connector and set HP8921 to TX test mode 2 Open the Tuner software and go to TUNE_DATA TX Reference Oscillator Warp in the left navigation tree Then click the Transmit...

Page 58: ...go to TUNE_DATA TX Transmit to Deviation in the left navigation tree Then click the Transmit On button Then set the modulation signal of HP8921 to 100 Hz 4 Adjust the vernier on Tuner until the frequ...

Page 59: ...Front end Filter 1 Connect the radio to HP8921 via the antenna connector 2 Connect the Audio Out port of the radio to the Audio In port of HP8921 and set HP8921 to RX test mode 3 Set the parameters on...

Page 60: ...fter tuning all the items of the radio you need to test the digital RF signal of the mobile radio via Aeroflex 3920 Digital Radio Test set Transmitting Step 1 Connect the mobile radio to Aeroflex 3920...

Page 61: ...to TEST RX Receiver BER 0 153 Step 3 Select the channel to be tested and click the Start button on Tuner Step 4 Observe the Average Rate displayed on Tuner You can set different Average Num the calcul...

Page 62: ...55 9 PCB View MD78X MD78XG PCB View Front Panel Top Layer...

Page 63: ...56 MD78X MD78XG PCB View Front Panel Bottom Layer...

Page 64: ...MD78X MD78XG PCB View Main Board Top Layer 57...

Page 65: ...MD78X MD78XG PCB View Main Board Bottom Layer 58...

Page 66: ...U100 X100 U905 U500 U909 U231 X302 U302 U401 USB Control Head Accessory Level Translator Option board U919 U902 U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto ba...

Page 67: ...Q6102 Gain 6dB Q801 Firstsage Gain 16dB Gain 15dB Gain 11dB Q805 PreDriver Q804 Driver Q802 Q803 Finalstage High Temperature Protection Tx Rx Switch Tx_PORT Rx_PORT Switch s Power 9 1V Harmonic Filter...

Page 68: ...2MX16 Mobile SDRAM 128Mb 8Mx16 JTAG EMIFF JTAG CLK EMIFS 19 2MHz TCXO Mcbsp2_TX Mcbsp2_RX BELL MCLK UART3 Rear Accessory MAP USB GPIOs UART2 or Volume 74HC595 Acc_ID PRGM GPIOs Control Head Clk data c...

Page 69: ...TP33 TP R46 270 R46 270 D4 D4 1 2 D8 D8 4 3 2 1 TP22 TP TP22 TP R24 NC R24 NC C43 0 047uF NC C43 0 047uF NC C13 0 1uF C13 0 1uF R43 1k R43 1k D18 D18 1 3 2 C63 270pF C63 270pF TP6 TP TP6 TP R41 270 R...

Page 70: ...0 01u R258 10K R258 10K R271 100 R271 100 R263 30K R263 30K R241 56K R241 56K Q233 UMC4 NTR Q233 UMC4 NTR 1 2 3 4 5 R252 100K R252 100K R202 10K R202 10K R232 33 R232 33 C248 0 1u C248 0 1u R235 10K R...

Page 71: ...100P C510 100P C512 0 1u C512 0 1u C506 0 01uF C506 0 01uF R529 33K R529 33K R500 100K R500 100K R505 0 R505 0 R502 1K R502 1K RN500 100 4 RN500 100 4 1 2 3 4 5 6 7 8 C523 NC C523 NC U500 U500 DVDD 1...

Page 72: ...6 G5 NC17 K5 NC18 L5 NC19 B6 NC22 G7 NC23 L7 NC24 A8 VSS1 G2 VSS2 J8 NC25 B8 NC21 B7 NC20 L6 NC26 H8 NC27 L8 NC28 M8 R517 33 R517 33 R353 10K R353 10K R322 10K R322 10K R351 10K R351 10K TP4053 TP4053...

Page 73: ...DVDD7 Y16 DVDD8 L21 DVDD9 U21 DVDDRTC V12 LDO FILTER J1 CONF V18 GPIO40 BCLKREQ W15 RTC_ON_NOFF Y12 GPIO23 MCLKREQ R10 OSC32K_OUT AA13 OSC32K_IN V13 CLK32K_IN P13 OSC1_OUT W3 OSC1_IN Y2 C384 0 01u C38...

Page 74: ...LKX N14 GPIO44 UART3 RX SPIF CS3 UWIRE CS3 P15 I2C SCL T18 GPIO48 I2C SDA V20 GPIO11 MCBSP2 CLKR V7 GPIO20 MCBSP2 CLKX Y6 GPIO12 MCBSP2 FSR W6 GPIO21 MCBSP2 FSX W7 GPIO19 MCBSP2 DR AA5 GPIO22 MCBSP2 D...

Page 75: ...R447 10K R447 10K R573 4 7k R573 4 7k R4964 7K R4964 7K C409 100p C409 100p R2 R1 R2 R1 Q409 R2 R1 R2 R1 Q409 1 2 5 3 4 6 U401 U401 FAULT 3 ON 4 IN 5 OUT 1 GND 2 D405 D405 C422 0 1uF C422 0 1uF R437...

Page 76: ...5 0 L409 L409 TP4022 TP4022 D408 D408 1 5 4 3 2 6 C459 NC C459 NC C472 NC C472 NC C463 100p C463 100p J404 J404 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 3...

Page 77: ...7k U909 U909 VDD 1 GND 2 CE 3 NC 4 VOUT 5 R922 NC R922 NC C980 10uF 25V C980 10uF 25V Q920 D45H8G Q920 D45H8G 1 3 2 DTC114EE Q923 DTC114EE Q923 3 2 1 C915 22uF 10V C915 22uF 10V R987 0 R987 0 M8 M8 1...

Page 78: ...C87 0 1u L150 NC L150 NC TP118 PLLSTB TP118 PLLSTB 1 C65 NC C65 NC R166 NC R166 NC R167 33 R167 33 C77 100p C77 100p C82 1000p C82 1000p C92 NC C92 NC R114 56 R114 56 U102 U102 Vin 1 OUT 2 GND 3 Vcc...

Page 79: ...6 8k R132 6 8k C152 4p C152 4p C31 3p C31 3p R185 nc R185 nc C145 NC C145 NC L123 15NH L123 15NH C159 4p C159 4p C15 10p C15 10p C26 3 6p C26 3 6p C185 56p C185 56p C155 12p C155 12p TP123 RX_LO TP123...

Page 80: ...1u C6179 0 1u C6163 7p C6163 7p C6142 47P C6142 47P TP6105 RX TP TP6105 RX TP D6102 D6102 1 2 TP6101 TX TP TP6101 TX TP C6245 NC C6245 NC C6120 1p C6120 1p C6125 NC C6125 NC R6116 0 R6116 0 D6103 D610...

Page 81: ...7 0 1u C754 1u C754 1u Q701 Q701 2 3 1 D702 HVC376B D702 HVC376B 2 1 L705 10u L705 10u C739 100p C739 100p C701 NC C701 NC C728 1000p C728 1000p C733 0 1u C733 0 1u R704 560 R704 560 C769 100p C769 10...

Page 82: ...07 100nH R804 4 7 R804 4 7 C836 2p C836 2p C909 100p C909 100p TP810 TEMP TP810 TEMP 1 R878 NC R878 NC R812 NC R812 NC R847 47K R847 47K Q813 Q813 3 2 1 C824 8pF C824 8pF C861 68pF C861 68pF TP806 Fin...

Page 83: ...001063300000 33 24 C34 B5B 3101054710010 470pF 95 R15 B3G 3001060000000 0 25 C35 B5C 3101054710010 470pF 96 R17 B2H 3001063300000 33 26 C36 B5B 3101054710010 470pF 97 R18 B2G 3001060000000 0 27 C37 B5...

Page 84: ...040010 0 1uF 13 R364 T3A 3001050000000 0 2 C331 T2A 3101081060010 10uF 14 R365 T3C 3001051030000 10k 3 C332 T2A 3101051040010 0 1uF 15 R366 T3C 3001051030000 10k 4 C333 T3A 3101081060010 10uF 16 R368...

Page 85: ...B7F 3101055600000 56pF 809 L707 T5I 3221506601000 Ferrite bead 43 C158 B7F 3101051800070 18pF 810 L708 B6H 3217107221010 220nH 44 C159 B7F 3101054090010 4pF 811 L709 T5G 3221506601000 Ferrite bead 45...

Page 86: ...C256 B5D 3101051010030 100pF 872 Q106 B7G 3408002000080 NPN transistor 106 C257 B5C 3101061050020 1uF 873 Q107 T7E 3404006000000 NPN transistor 107 C258 B5C 3101051040010 0 1uF 874 Q108 B8F 3403999000...

Page 87: ...2 Q921 B2E 3404999000020 NPN transistor 166 C311 B5B 3101051040010 0 1uF 933 Q922 T2C 3403008000010 Transistor 167 C32 B8G 3101050500010 5pF 934 Q923 T2C 3403008000010 Transistor 168 C325 T8B 31010510...

Page 88: ...101051040010 0 1uF 997 R231 B6C 3001053300010 33 231 C394 B7B 3101051040010 0 1uF 998 R232 B6D 3001053300010 33 232 C396 T6B 3101061050020 1uF 999 R234 B6C 3001051030000 10k 233 C398 B6B 3101051040010...

Page 89: ...0 33 293 C468 B8C 3101051010030 100pF 1060 R337 T7C 3001051010000 100 294 C469 B8A 3101051010030 100pF 1061 R338 T7B 3001051010000 100 295 C473 T8D 3101051040010 0 1uF 1062 R339 T7C 3001051010000 100...

Page 90: ...01052290010 2 2pF 1123 R409 T8C 3001051010000 100 357 C6123 T5J 3001050000000 0 1124 R410 T6C 3001051010000 100 358 C6124 T6J 3101050100030 1pF 1125 R411 T6C 3001051010000 100 359 C6126 T6J 3101050100...

Page 91: ...C702 T6H 3101051030020 0 01uF 1186 R476 T8C 3001054720000 4 7k 420 C703 T6H 3101060300010 3pF 1187 R479 T6C 3001053300010 33 421 C704 T6H 3101052210010 220pF 1188 R481 B5B 3001051030000 10k 422 C705...

Page 92: ...482 C79 T7E 3101051020010 1000pF 1249 R544 B5B 3001050000000 0 483 C8 T7E 3101054710010 470pF 1250 R545 B7D 3001053300010 33 484 C80 T8F 3101051030020 0 01uF 1251 R546 B2C 3001061010000 100 485 C801...

Page 93: ...0000 1 2k 545 C88 T7F 3110071040000 0 1uF 1312 R6132 T7I 3001055100010 51 546 C880 T6E 3101061830000 0 018uF 1313 R6133 T7H 3001053310010 330 547 C883 B4I 3101052210010 220pF 1314 R6134 T7H 3001053030...

Page 94: ...020 1uF 1375 R843 T6F 3001069120000 9 1k 609 C947 T5B 3101051040010 0 1uF 1376 R844 T6F 3001064720000 4 7k 610 C948 T4B 3101051040010 0 1uF 1377 R845 T6E 3001062030000 20k 611 C949 B2G 3101058200000 8...

Page 95: ...240000000 ESD protection diode 1430 R929 B2A 3001051010000 100 664 D231 B4C 3310240000000 ESD protection diode 1431 R930 B3A 3001051030000 10k 665 D232 B7D 3310240000000 ESD protection diode 1432 R931...

Page 96: ...board connector 1479 R986 T6D 3001050000000 0 713 J404 B8C 5206040200010 FFC connector 1480 R987 T7C 3001050000000 0 714 L1 B7F 3213212332000 3 3uH 1481 RN230 B6C 3005051010010 100 715 L103 B7E 32176...

Page 97: ...L234 B5D 3211506101000 Ferrite bead 1527 X375 T7B 3701327610060 Crystal 761 L235 B5D 3211506101000 Ferrite bead 1528 Z6100 T8I 3802733540030 Crystal filter 762 L321 T3A 3212106390000 39nH 1529 321769...

Page 98: ...221506601000 Ferrite bead 45 C16 T6E 3101050600010 6pF 820 L712 T6I 3221506601000 Ferrite bead 46 C160 B6G 3101052210010 220pF 821 L713 T5G 3213306561000 0 56uH 47 C161 B7G 3101055600000 56pF 822 L714...

Page 99: ...T8G 3401002000990 NPN transistor 109 C26 B7E 3101063690000 3 6pF 884 Q112 B8H 3403999000000 Transistor 110 C260 B5C 3101051030020 0 01uF 885 Q116 T7G 3403999000000 Transistor 111 C261 B5C 310105103002...

Page 100: ...061010000 100 170 C329 T6D 3101051040010 0 1uF 945 R1110 T8G 3001053300010 33 171 C33 B8G 3101051010030 100pF 946 R114 T7F 3001065600000 56 172 C330 T3A 3101051040010 0 1uF 947 R117 B7E 3001053930000...

Page 101: ...0020 0 01uF 1009 R237 B5A 3001055630000 56k 235 C4 B7G 3101051500080 15pF 1010 R238 B5B 3001053320000 3 3k 236 C400 B7B 3101051040010 0 1uF 1011 R239 B6B 3001055620000 5 6k 237 C402 T6C 3101071060010...

Page 102: ...010 33 297 C476 T2C 3101054710010 470pF 1072 R348 T8B 3001050000000 0 298 C477 T7C 3101051010030 100pF 1073 R349 T8B 3001053300010 33 299 C478 T7C 3101051010030 100pF 1074 R350 T8B 3001053300010 33 30...

Page 103: ...1051590000 1 5pF 1135 R414 T7A 3001051000000 10 361 C6128 T6J 3101054710010 470pF 1136 R415 T7C 3001053300010 33 362 C6129 T5J 3101051800010 18pF 1137 R416 T8C 3001051010000 100 363 C6130 T5J 31010510...

Page 104: ...C706 T6H 3101054710010 470pF 1198 R484 T8C 3001054720000 4 7k 424 C707 T6H 3101051040010 0 1uF 1199 R485 B7C 3001053300010 33 425 C708 T6H 3101051040010 0 1uF 1200 R486 B7C 3001053300010 33 426 C71 B7...

Page 105: ...02 B1F 3101063320000 3300pF 1261 R554 T8D 3001051020010 1k 487 C803 B1F 3101063300000 33pF 1262 R555 T8D 3001051030000 10k 488 C804 B1F 3101092260010 22uF 1263 R556 T2C 3001051010000 100 489 C805 T4G...

Page 106: ...30000 20k 549 C878 T6F 3101062210000 220pF 1324 R6137 T7I 3001053030000 30k 550 C879 T1G 3101080200010 2pF 1325 R6138 B8I 3001060000000 0 551 C88 T7F 3110071040000 0 1uF 1326 R6139 T8H 3001055630000 5...

Page 107: ...1051020010 1000pF 1387 R845 T6E 3001062030000 20k 613 C945 B2A 3101054710010 470pF 1388 R846 T6E 3001061030000 10k 614 C946 T5D 3101061050020 1uF 1389 R847 B4H 3001054730000 47k 615 C947 T5B 310105104...

Page 108: ...witching diode 1442 R925 T5D 3001064720000 4 7k 668 D129 B5C 3303030800020 Switching diode 1443 R929 B2A 3001051010000 100 669 D230 B4C 3310240000000 ESD protection diode 1444 R930 B3A 3001051030000 1...

Page 109: ...T7C 3303010500090 Switching diode 1491 R985 T6C 3001050000000 0 717 F900 B2B 4002000000340 Fuse 1492 R986 T6D 3001050000000 0 718 J400 T8C 5201020200030 Board to board connector 1493 R987 T7C 30010500...

Page 110: ...G 3210306270000 27nH 1533 U915 B7D 3608015000060 Power management IC 759 L168 B8E 3210306270000 27nH 1534 U917 B2A 3609006003050 Reset IC 760 L169 T8G 3210306270000 27nH 1535 U918 B7D 3608015000210 Po...

Page 111: ...UHF2 450 520 MHz...

Page 112: ...14 5 2 2 Control Module 15 5 2 3 Audio Module 21 5 2 4 PCB Difference 22 5 3 RF Section 23 5 3 1 Transmitter Circuit 23 5 3 2 Receiver Circuit 26 5 3 3 FGU Circuit 27 5 4 GPS Circuit Section 29 6 Tro...

Page 113: ...Contents UHF2 450 520 MHz ii 9 PCB View 54 10 Block Diagram 58 11 Schematic Diagram 61 12 Parts List 75 12 1 Front Panel 75 12 2 GPS Circuit 76 12 3 Main Board 25 W 76 12 4 Main Board 45 W 89...

Page 114: ...Key 11 Redial Answer Call Key 5 Back Group Call Management Key 12 Programmable Keys 6 Dial back End Home Screen Key 13 Microphone Connector 7 Power On Off Key 14 Microphone Installation Index Note The...

Page 115: ...Controls UHF2 450 520 MHz 2 Rear Panel No Part Name No Part Name 1 RF Antenna Connector 3 Accessory Connector 2 Power Inlet 4 GPS Antenna Connector Note The GPS antenna interface is only available for...

Page 116: ...wer cord and loosen the two screws to remove the radio Step 2 Remove the antenna Step 3 Loosen the three screws to remove the front panel Then remove the FFC Step 4 Detach the volume control knob and...

Page 117: ...en the eleven screws to remove the upper shield cover Step 7 Loosen the screw fixing the antenna connector and two screws fixing the PA module Then take the PCB out 2 2 Reassembling the Radio To reass...

Page 118: ...1 30 6100533101000 Waterproof ring for aluminum chassis 1 5 5208010100010 Connector male 1 31 6300126000000 Upper cover of the aluminum chassis 1 6 6001079000000 Light guide plate for keys 1 32 710301...

Page 119: ...18 6201739000000 Inner lining for knob 1 44 3103994770150 Electrolytic capacitor 1 19 6000876000000 Encoder knob 1 45 7212002500000 Nut 1 20 6100493000000 Power on off key 1 46 6100531100000 Waterproo...

Page 120: ...UHF2 450 520 MHz Exploded View and Packing Guide 7 3 2 Packing Guide...

Page 121: ...ndby 0 6 A Receive 2 0 A Transmit 5 W 5 A 25 W 8 A 45 W 12 A Frequency Stability 1 5 ppm Antenna Impedance 50 Dimensions H W D 60 mm 174 mm 200 mm 2 4 inch 6 9 inch 7 9 inch Weight 1 7 kg 3 75 lbs LCD...

Page 122: ...Type AMBE or SELP Digital Protocol ETSI TS102 361 1 2 3 Receiver Sensitivity Analog 0 3 V 12 dB SINAD 0 22 V Typical 12 dB SINAD 0 4 V 20 dB SINAD Digital 0 3 V BER5 Adjacent Channel Selectivity TIA 6...

Page 123: ...Bm Environment Operating Temperature 30 to 60 Storage Temperature 40 to 85 ESD IEC 61000 4 2 level4 8 kV contact 15 kV air American Military Standard MIL STD 810 C D E F G Dust Water Protection IP54 H...

Page 124: ...Start 10s Horizontal Accuracy 10 m Note All Specifications are tested according to applicable standards and subject to change without notice due to continuous development 4 2 Blind Spot No Blind Spot...

Page 125: ...DATA U231 5VD SPK SPK GPIO GPIO GPIO McBSP FILTER USB DP USB DM FLASH D p1 P5 C2 P4 Switch P3 Menu C1 Back P2 Down C0 R2 R1 R0 Keys Matrix FLASH A1 FLASH WE FLASH OE RS A B S UART2 GPIO EMER P6 C3 C4...

Page 126: ...is fed to the serial to parallel converter IC U1 and then is output by U302 RX status is indicated by green LED and TX status by red LED Backlight is activated upon any key press The red and green LE...

Page 127: ...U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto baterry Voltage 13 6 15 9V3A 9V1A 9V1A 5VA 4V3A 3V3A 5VA 3V3A 1V6D 5VD 3V3D 1V8D 3V3DP 3V3A 5VA 5VA Both the baseba...

Page 128: ...nal PWB to power off the radio is detected by U302 which then controls PWR_CTRL to output low level Afterwards the radio becomes powered off Ignition Sense The mobile radio can be turned on when ignit...

Page 129: ...are completed Clock Option Board U231 U302 32 768KHz 32K 32K_IN VSS CLK32K_IN APLL 19 2MHz 9 6MHz DAC U100 19 2MHz U701 19 2MHz Input Clock The 32K clock provided by X375 is mainly used for timing an...

Page 130: ...external devices at most generally transmitting control and status messages of external devices and reading data from ROM Its maximum clock frequency is a quarter of system clock frequency In this ca...

Page 131: ...interfaces including MCBSP1 MCBSP2 and MCBSP3 which are compatible with various interfaces MCBSP1 is connected to the interface I2C of audio processor U231 to realize two way transmission of digital...

Page 132: ...on with GPS module UART2 is used for communication with front panel GPIO17 and GPIO18 UART3 is used for communication with the Option Board and accessory connector USB Interface USB DM USB PUEN U302 U...

Page 133: ...ESET OUT I O I O I O O O VIH MIN 0 7VDD VIL MAX 0 3VDD VOH MIN 0 8VDD VOL MAX 0 22VDD GPIO5 output signal of resetting the option board GPIO4 GPIO5 Unidirectional output interfaces They require their...

Page 134: ...oltage 5 0 V 5 2 3 Audio Module The audio module is used to output RX audio and input relay audio and TX audio which serves as the RX audio path and TX audio path RX Audio Path U302 sends digital audi...

Page 135: ...5 and R264 a bias voltage of about 7 V is provided to the front panel MIC The external MIC is connected to the MIC_HED of the codec U231 as a unidirectional input Both MICs are controlled by Q232 When...

Page 136: ...hat U906 generates the reset signal to reset OMAP Version H The audio amplifier is different compared with Version D and Version F Version L The DC DC conversion circuit is optimized GPS pulse and GPS...

Page 137: ...Pre driver Power Amplifier The pre driver power amplifier is formed by Q805 with variable gain controlled by voltage VGG The input matching circuit is composed of C826 L826 L814 C843 and R824 Driver P...

Page 138: ...is applied to the power control circuit U801 Then U801 outputs the voltage VGG for controlling the gate voltage of Q805 and Q804 ensuring a constant power output The reverse power is coupled to D804...

Page 139: ...18M 71 1M RX_LO 376 65 446 65MHz TV Attenuator 1dB Attenuator Control 10dB Tx Rx Switch Low pass Filter Receiver Front end RF signals feed to the low pass filter to remove out of band signals and are...

Page 140: ...e second LO signal The clock frequency is 18 MHz which is generated by the external LC D702 L715 and C745 resonance loop DSP U302 acquires the audio signal from IF IC Then this signal goes through U30...

Page 141: ...ting the reference frequency Meanwhile the frequency generated by VCO goes into PLL IC U100 for frequency division The resulting frequency will be compared with reference frequency in terms of phase d...

Page 142: ...Antenna LCD Power REB 1315LPx GPS data can be acquired via the programmable GPS key on the front panel of the mobile radio The GPS function is realized via REB 1315LPx module which integrates GPS bas...

Page 143: ...Check power on circuit and peripheral circuits of U902 Check power on circuit and peripheral circuits of U900 and U901 Yes No Yes No Yes Yes No No Yes Yes No No U903 1V8D is normal 7 U919 1V6D is nor...

Page 144: ...aged No GPS circuit is normal Replace GPS module U326 Yes Replace the active antenna No SiRF Demo software displays communication status on the computer Voltage at SMA of GPS antenna connector is norm...

Page 145: ...leshooting flow chart of FGU circuit No Power of Q801 is normal 4 Yes Check Q801 and relevant components No Power of Q805 is normal 5 Check Q805 and relevant components Yes No Power of Q804 is normal...

Page 146: ...ke sure that the back end circuit is disconnected during test 4 The gain is 16 dB and the input signal is 0 dBm at Q801 5 The gain is 15 dB and the input signal is 0 dBm at Q805 6 The gain is 11 dB an...

Page 147: ...ck RX VCO and LO amplifier No Check D6106 T6100 T6101 and peripheral circuits Sensitivity at TP6104 is normal 6 Yes Yes Check Q6102 D6103 D6104 and peripheral circuits Check L809 L813 M801 and periphe...

Page 148: ...and Q103 Yes Check D107 D108 D109 D110 D121 D122 D125 and D126 No TP124 CV is normal 4 Yes PLL U100 is normal 5 Yes No Replace PLL U100 No Check U101 U102 R187 and R171 TP109 feedback is normal 6 Yes...

Page 149: ...Flow Chart UHF2 450 520 MHz 36 4 The CV of TP124 ranges from 0 5 V to 4 5 V 5 PLL U100 is supplied by 5 V and 3 3 V normally 6 The power of the signal from TP109 to PLL is about 15 dBm 7 TP110 outputs...

Page 150: ...low for detailed function definitions 2 PTT input Digital input 3 3 V CMOS PTT input for the palm microphone which is valid at low level 3 External audio output Analog output Load impedance 1 k Vrms 6...

Page 151: ...palm microphone this pin is used for HOOK function when desktop microphone is detected this pin is used for MONITOR function 10 Accessory identification interface 2 Digital input 3 3V CMOS Pin 1 and...

Page 152: ...tibility with other interfaces Users can further develop the radio via this interface The figure and definition of each pin is as follows Pin No Name Type Signal Electrical Performance Description 1 V...

Page 153: ...the external Mic PTT is held down 8 RX Audio Analog signal output Load impedance 1k Vrms 300 mV 10 1 kHz 60 system max deviation Default output is 300 mV The output signal amplitude can be changed by...

Page 154: ...13 ACC_IO2 can compose three accessory identification statuses Please refer to the DB26 Accessory Identification Matrix Table below for detailed function definitions 16 PRGM_IN_PTT Digital input 5V T...

Page 155: ...Note When a pin is marked with 5 V TTL level this pin has the pull up function If the pin needs to be set to high level empty this pin DB26 Accessory Identification Matrix Table composed of Pin 13 an...

Page 156: ...OVCC 1 65 3 3 V adjustable I O port 5 FLM Synchronization signal control port 6 CS Chip select signal 7 RS Register select 8 WR Write signal 9 RD Read signal 10 DB0 Data bus 11 DB1 12 DB2 13 DB3 14 DB...

Page 157: ...gital input 3 External_Audio Analog output 4 USB_D USB data cable 5 GND Ground cable 6 USB_VBUS Power supply 7 MIC_IN Analog input 8 USB_D USB data cable 9 HOOK Hook signal input 10 ACC_IO2 Digital in...

Page 158: ...an or equal to 47 k 11 UART TX UART O UART 13 UART RX I 15 UART CT S I 17 UART RT S O 2 I2C SDA I2C I O I2C 4 I2C SCL O 6 MCBSP D R MCBSP I McBSP Multi channel buffered serial port 8 MCBSP W CLK I O 1...

Page 159: ...igital input output 4 SW B sense Power supply 5 External Alarm Analog voltage output 6 Power Ground Power supply grounding 7 Tx Audio Analog input 8 RX Audio Analog output 9 Spkr Analog output 10 D US...

Page 160: ...iption 1 INT_MIC Audio input 2 MIC_GROUND Audio input grounding 3 ACC_IO1 Accessory identification interface 1 4 USB_VBUS USB power supply 5 HOOK HOOK 6 PTT PTT 7 USB_D USB data cable D 8 USB_D USB da...

Page 161: ...light control IC chip select 25 CLOC Backlight control IC clock 26 DATA Backlight control IC data 27 OE_LCD LCD read enable 28 WE_LCD LCD write enable 29 CS2_LCD LCD chip select 30 F_A1_LCD LCD regist...

Page 162: ...radio to HP8921 via the antenna connector and set HP8921 to TX test mode 2 Open the Tuner software and go to TUNE_DATA TX Reference Oscillator Warp in the left navigation tree Then click the Transmit...

Page 163: ...iation in the left navigation tree Then click the Transmit On button Then set the modulation signal of HP8921 to 100 Hz 4 Adjust the vernier on Tuner until the frequency deviation displayed on HP8921...

Page 164: ...921 via the antenna connector 2 Connect the Audio Out port of the radio to the Audio In port of HP8921 and set HP8921 to RX test mode 3 Set the parameters on the HP8921 as follows Output RF signal 118...

Page 165: ...he items of the radio you need to test the digital RF signal of the mobile radio via Aeroflex 3920 Digital Radio Test set Transmitting Step 1 Connect the mobile radio to Aeroflex 3920 via the antenna...

Page 166: ...X Receiver BER 0 153 Step 3 Select the channel to be tested and click the Start button on Tuner Step 4 Observe the Average Rate displayed on Tuner You can set different Average Num the calculation bas...

Page 167: ...54 9 PCB View MD78X MD78XG PCB View Front Panel Top Layer...

Page 168: ...55 MD78X MD78XG PCB View Front Panel Bottom Layer...

Page 169: ...MD78X MD78XG PCB View Main Board Top Layer 56...

Page 170: ...MD78X MD78XG PCB View Main Board Bottom Layer 57...

Page 171: ...U100 X100 U905 U500 U909 U231 X302 U302 U401 USB Control Head Accessory Level Translator Option board U919 U902 U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto ba...

Page 172: ...Q6102 Gain 6dB Q801 Firstsage Gain 16dB Gain 15dB Gain 11dB Q805 PreDriver Q804 Driver Q802 Q803 Finalstage High Temperature Protection Tx Rx Switch Tx_PORT Rx_PORT Switch s Power 9 1V Harmonic Filter...

Page 173: ...2MX16 Mobile SDRAM 128Mb 8Mx16 JTAG EMIFF JTAG CLK EMIFS 19 2MHz TCXO Mcbsp2_TX Mcbsp2_RX BELL MCLK UART3 Rear Accessory MAP USB GPIOs UART2 or Volume 74HC595 Acc_ID PRGM GPIOs Control Head Clk data c...

Page 174: ...TP33 TP R46 270 R46 270 D4 D4 1 2 D8 D8 4 3 2 1 TP22 TP TP22 TP R24 NC R24 NC C43 0 047uF NC C43 0 047uF NC C13 0 1uF C13 0 1uF R43 1k R43 1k D18 D18 1 3 2 C63 270pF C63 270pF TP6 TP TP6 TP R41 270 R...

Page 175: ...0 01u R258 10K R258 10K R271 100 R271 100 R263 30K R263 30K R241 56K R241 56K Q233 UMC4 NTR Q233 UMC4 NTR 1 2 3 4 5 R252 100K R252 100K R202 10K R202 10K R232 33 R232 33 C248 0 1u C248 0 1u R235 10K R...

Page 176: ...100P C510 100P C512 0 1u C512 0 1u C506 0 01uF C506 0 01uF R529 33K R529 33K R500 100K R500 100K R505 0 R505 0 R502 1K R502 1K RN500 100 4 RN500 100 4 1 2 3 4 5 6 7 8 C523 NC C523 NC U500 U500 DVDD 1...

Page 177: ...6 G5 NC17 K5 NC18 L5 NC19 B6 NC22 G7 NC23 L7 NC24 A8 VSS1 G2 VSS2 J8 NC25 B8 NC21 B7 NC20 L6 NC26 H8 NC27 L8 NC28 M8 R517 33 R517 33 R353 10K R353 10K R322 10K R322 10K R351 10K R351 10K TP4053 TP4053...

Page 178: ...DVDD7 Y16 DVDD8 L21 DVDD9 U21 DVDDRTC V12 LDO FILTER J1 CONF V18 GPIO40 BCLKREQ W15 RTC_ON_NOFF Y12 GPIO23 MCLKREQ R10 OSC32K_OUT AA13 OSC32K_IN V13 CLK32K_IN P13 OSC1_OUT W3 OSC1_IN Y2 C384 0 01u C38...

Page 179: ...LKX N14 GPIO44 UART3 RX SPIF CS3 UWIRE CS3 P15 I2C SCL T18 GPIO48 I2C SDA V20 GPIO11 MCBSP2 CLKR V7 GPIO20 MCBSP2 CLKX Y6 GPIO12 MCBSP2 FSR W6 GPIO21 MCBSP2 FSX W7 GPIO19 MCBSP2 DR AA5 GPIO22 MCBSP2 D...

Page 180: ...R447 10K R447 10K R573 4 7k R573 4 7k R4964 7K R4964 7K C409 100p C409 100p R2 R1 R2 R1 Q409 R2 R1 R2 R1 Q409 1 2 5 3 4 6 U401 U401 FAULT 3 ON 4 IN 5 OUT 1 GND 2 D405 D405 C422 0 1uF C422 0 1uF R437...

Page 181: ...5 0 L409 L409 TP4022 TP4022 D408 D408 1 5 4 3 2 6 C459 NC C459 NC C472 NC C472 NC C463 100p C463 100p J404 J404 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 3...

Page 182: ...7k U909 U909 VDD 1 GND 2 CE 3 NC 4 VOUT 5 R922 NC R922 NC C980 10uF 25V C980 10uF 25V Q920 D45H8G Q920 D45H8G 1 3 2 DTC114EE Q923 DTC114EE Q923 3 2 1 C915 22uF 10V C915 22uF 10V R987 0 R987 0 M8 M8 1...

Page 183: ...C87 0 1u L150 NC L150 NC TP118 PLLSTB TP118 PLLSTB 1 C65 NC C65 NC R166 NC R166 NC R167 33 R167 33 C77 100p C77 100p C82 1000p C82 1000p C92 NC C92 NC R114 56 R114 56 U102 U102 Vin 1 OUT 2 GND 3 Vcc...

Page 184: ...6 8k R132 6 8k C152 4p C152 4p C31 3p C31 3p R185 nc R185 nc C145 NC C145 NC L123 15NH L123 15NH C159 4p C159 4p C15 10p C15 10p C26 3 6p C26 3 6p C185 56p C185 56p C155 12p C155 12p TP123 RX_LO TP123...

Page 185: ...1u C6179 0 1u C6163 7p C6163 7p C6142 47P C6142 47P TP6105 RX TP TP6105 RX TP D6102 D6102 1 2 TP6101 TX TP TP6101 TX TP C6245 NC C6245 NC C6120 1p C6120 1p C6125 NC C6125 NC R6116 0 R6116 0 D6103 D610...

Page 186: ...7 0 1u C754 1u C754 1u Q701 Q701 2 3 1 D702 HVC376B D702 HVC376B 2 1 L705 10u L705 10u C739 100p C739 100p C701 NC C701 NC C728 1000p C728 1000p C733 0 1u C733 0 1u R704 560 R704 560 C769 100p C769 10...

Page 187: ...07 100nH R804 4 7 R804 4 7 C836 2p C836 2p C909 100p C909 100p TP810 TEMP TP810 TEMP 1 R878 NC R878 NC R812 NC R812 NC R847 47K R847 47K Q813 Q813 3 2 1 C824 8pF C824 8pF C861 68pF C861 68pF TP806 Fin...

Page 188: ...01054710010 470pF 94 R12 B2H 3001063300000 33 24 C34 B5B 3101054710010 470pF 95 R15 B3G 3001060000000 0 25 C35 B5C 3101054710010 470pF 96 R17 B2H 3001063300000 33 26 C36 B5B 3101054710010 470pF 97 R18...

Page 189: ...ion No Ref No Print No Part No Description 1 C330 T3A 3101051040010 0 1uF 13 R364 T3A 3001050000000 0 2 C331 T2A 3101081060010 10uF 14 R365 T3C 3001051030000 10k 3 C332 T2A 3101051040010 0 1uF 15 R366...

Page 190: ...uH 41 C155 B7G 3101061000000 10pF 810 L706 T4H 3221506601000 Ferrite bead 42 C156 B6E 3101052210010 220pF 811 L707 T5I 3221506601000 Ferrite bead 43 C157 B7F 3101055600000 56pF 812 L708 B6H 3217107221...

Page 191: ...873 Q104 B7F 3403003000060 NPN transistor 105 C254 B5C 3101052210010 220pF 874 Q105 B8F 3403999000000 Transistor 106 C255 B5C 3101051050000 1uF 875 Q106 B7G 3408002000080 NPN transistor 107 C256 B5D...

Page 192: ...Q914 B3B 3403008000010 Transistor 165 C309 B7A 3101051010030 100pF 934 Q916 B2A 3599990000610 N MOSFET 166 C31 B7F 3101060500010 5pF 935 Q921 B2E 3404999000020 NPN transistor 167 C310 T6A 310105105000...

Page 193: ...C 3101051010030 100pF 998 R199 T8G 3001051030000 10k 230 C391 T7C 3101051040010 0 1uF 999 R2 T8E 3001060000000 0 231 C392 B6C 3101051040010 0 1uF 1000 R202 B5D 3001051030000 10k 232 C393 B6C 310105104...

Page 194: ...10k 292 C465 B8C 3101051010030 100pF 1061 R324 T7C 3001053300010 33 293 C466 B8C 3101051010030 100pF 1062 R326 T6B 3001051030000 10k 294 C467 B8C 3101051010030 100pF 1063 R327 B6C 3001053300010 33 29...

Page 195: ...J 3101050590020 0 5pF 1124 R406 T6C 3001051010000 100 356 C6120 T4J 3101051890050 1 8pF 1125 R407 T8C 3001060000000 0 357 C6121 T4J 3101051890050 1 8pF 1126 R408 T7C 3001053300010 33 358 C6122 T5J 310...

Page 196: ...7k 418 C7 B7F 3101051040010 0 1uF 1187 R473 B2C 3001053300010 33 419 C70 T6F 3110071040000 0 1uF 1188 R474 B2C 3001053300010 33 420 C702 T6H 3101051030020 0 01uF 1189 R475 T2A 3001051030000 10k 421 C...

Page 197: ...C767 T5H 3101051010030 100pF 1250 R540 T8D 3001051030000 10k 482 C769 T6G 3101051010030 100pF 1251 R541 T8C 3001051030000 10k 483 C77 T8F 3101051010030 100pF 1252 R543 T7C 3001051030000 10k 484 C78 T...

Page 198: ...4 C875 B4H 3101051510000 150pF 1313 R6130 T7I 3001055120030 5 1k 545 C877 T6E 3101062210000 220pF 1314 R6131 T7I 3001051220000 1 2k 546 C878 T6F 3101062210000 220pF 1315 R6132 T7I 3001055100010 51 547...

Page 199: ...066800000 68pF 1376 R841 B4H 3001053330000 33k 608 C942 T4B 3101053310020 330pF 1377 R842 B4I 3001051230000 12k 609 C943 B1F 3101062700010 27pF 1378 R843 T6F 3001061230020 12k 610 C944 B2B 31010510200...

Page 200: ...3 D126 B7G 3304010100220 Varactor 1432 R919 T5D 3001051540000 150k 664 D127 T7E 3303030100010 Switching diode 1433 R924 B4D 3001061020010 1k 665 D128 B4I 3303030100010 Switching diode 1434 R925 T5D 30...

Page 201: ...6D 3001050000000 0 713 D921 T2A 3302030500030 Zener diode 1482 R984 B3A 3001052210000 220 714 D922 T7C 3303010500090 Switching diode 1483 R985 T6C 3001050000000 0 715 F900 B2B 4002000000340 Fuse 1484...

Page 202: ...bead 1529 W321 T3A 4411100002000 IPX RF connector 761 L233 B5C 3211506101000 Ferrite bead 1530 X100 T8E 3701019250030 TCXO 762 L234 B5D 3211506101000 Ferrite bead 1531 X302 T7B 3701019250040 TCXO 763...

Page 203: ...00000 56pF 816 L706 T4H 3221506601000 Ferrite bead 44 C158 B7F 3101052000020 20pF 817 L707 T5I 3221506601000 Ferrite bead 45 C159 B7F 3101053690030 3 6pF 818 L708 B6H 3217107221010 220nH 46 C16 T6E 31...

Page 204: ...tor 106 C256 B5D 3101051010030 100pF 879 Q104 B7F 3403003000060 NPN transistor 107 C257 B5C 3101061050020 1uF 880 Q105 B8F 3403999000000 Transistor 108 C258 B5C 3101051040010 0 1uF 881 Q106 B7G 340800...

Page 205: ...B2A 3403008000010 Transistor 167 C311 B5B 3101051040010 0 1uF 940 Q914 B3B 3403008000010 Transistor 168 C32 B8G 3101050500010 5pF 941 Q916 B2A 3599990000610 N MOSFET 169 C325 T8B 3101051040010 0 1uF...

Page 206: ...C393 B6C 3101051040010 0 1uF 1004 R198 T7G 3001051530010 15k 232 C394 B7B 3101051040010 0 1uF 1005 R199 T8G 3001051030000 10k 233 C396 T6B 3101061050020 1uF 1006 R2 T8E 3001060000000 0 234 C398 B6B 3...

Page 207: ...0 33 294 C468 B8C 3101051010030 100pF 1067 R322 T5B 3001051030000 10k 295 C469 B8A 3101051010030 100pF 1068 R324 T7C 3001053300010 33 296 C473 T8D 3101051040010 0 1uF 1069 R326 T6B 3001051030000 10k 2...

Page 208: ...T5J 3101050590020 0 5pF 1130 R405 T2A 3001061030000 10k 358 C6123 T5J 3001050000000 0 1131 R406 T6C 3001051010000 100 359 C6124 T6J 3101050100030 1pF 1132 R407 T8C 3001060000000 0 360 C6126 T6J 310105...

Page 209: ...420 C703 T6H 3101060300010 3pF 1193 R472 T2B 3001054720000 4 7k 421 C704 T6H 3101052210010 220pF 1194 R473 B2C 3001053300010 33 422 C705 T6H 3101051040010 0 1uF 1195 R474 B2C 3001053300010 33 423 C706...

Page 210: ...483 C8 T7E 3101054710010 470pF 1256 R539 T7C 3001051030000 10k 484 C80 T8F 3101051030020 0 01uF 1257 R540 T8D 3001051030000 10k 485 C801 B1F 3101081020010 1000pF 1258 R541 T8C 3001051030000 10k 486 C8...

Page 211: ...6 T6F 3101068200030 82pF 1319 R6129 B7I 3001063310010 330 547 C868 B4H 3101061040010 0 1uF 1320 R6130 T7I 3001055120030 5 1k 548 C87 T7E 3101051040010 0 1uF 1321 R6131 T7I 3001051220000 1 2k 549 C870...

Page 212: ...62250000 2 2uF 1382 R839 B4H 3001053320000 3 3k 610 C935 B5D 3101061040010 0 1uF 1383 R840 T3I 3101060800010 8pF 611 C936 T5D 3101051010030 100pF 1384 R841 B4H 3001053330000 33k 612 C938 T4D 310109226...

Page 213: ...ractor 1439 R919 T5D 3001051540000 150k 667 D121 B7G 3304010100220 Varactor 1440 R924 B4D 3001061020010 1k 668 D122 B7G 3304010100220 Varactor 1441 R925 T5D 3001064720000 4 7k 669 D125 B7G 33040101002...

Page 214: ...0030 Zener diode 1489 R984 B3A 3001052210000 220 717 D918 T3C 3302030500030 Zener diode 1490 R985 T6C 3001050000000 0 718 D919 T2A 3303010500090 Switching diode 1491 R986 T6D 3001050000000 0 719 D920...

Page 215: ...0180 Power management IC 757 L152 B7F 3221506601000 Ferrite bead 1530 U910 T7C 3626015000010 Reset IC 758 L154 T8F 3213306561000 0 56uH 1531 U914 T3C 3605008005070 Operational amplifier 759 L156 T7F 3...

Page 216: ...UHF3 350 400 MHz...

Page 217: ...14 5 2 2 Control Module 15 5 2 3 Audio Module 21 5 2 4 PCB Difference 22 5 3 RF Section 23 5 3 1 Transmitter Circuit 23 5 3 2 Receiver Circuit 26 5 3 3 FGU Circuit 27 5 4 GPS Circuit Section 29 6 Tro...

Page 218: ...Contents UHF3 350 400 MHz ii 9 PCB View 54 10 Block Diagram 58 11 Schematic Diagram 61 12 Parts List 75 12 1 Front Panel 75 12 2 GPS Circuit 76 12 3 Main Board 25 W 76 12 4 Main Board 45 W 89...

Page 219: ...Key 11 Redial Answer Call Key 5 Back Group Call Management Key 12 Programmable Keys 6 Dial back End Home Screen Key 13 Microphone Connector 7 Power On Off Key 14 Microphone Installation Index Note The...

Page 220: ...Controls UHF3 350 400 MHz 2 Rear Panel No Part Name No Part Name 1 RF Antenna Connector 3 Accessory Connector 2 Power Inlet 4 GPS Antenna Connector Note The GPS antenna interface is only available for...

Page 221: ...wer cord and loosen the two screws to remove the radio Step 2 Remove the antenna Step 3 Loosen the three screws to remove the front panel Then remove the FFC Step 4 Detach the volume control knob and...

Page 222: ...en the eleven screws to remove the upper shield cover Step 7 Loosen the screw fixing the antenna connector and two screws fixing the PA module Then take the PCB out 2 2 Reassembling the Radio To reass...

Page 223: ...1 30 6100533101000 Waterproof ring for aluminum chassis 1 5 5208010100010 Connector male 1 31 6300126000000 Upper cover of the aluminum chassis 1 6 6001079000000 Light guide plate for keys 1 32 710301...

Page 224: ...18 6201739000000 Inner lining for knob 1 44 3103994770150 Electrolytic capacitor 1 19 6000876000000 Encoder knob 1 45 7212002500000 Nut 1 20 6100493000000 Power on off key 1 46 6100531100000 Waterproo...

Page 225: ...UHF3 350 400 MHz Exploded View and Packing Guide 7 3 2 Packing Guide...

Page 226: ...ndby 0 6 A Receive 2 0 A Transmit 5 W 5 A 25 W 8 A 45 W 12 A Frequency Stability 1 5 ppm Antenna Impedance 50 Dimensions H W D 60 mm 174 mm 200 mm 2 4 inch 6 9 inch 7 9 inch Weight 1 7 kg 3 75 lbs LCD...

Page 227: ...Type AMBE or SELP Digital Protocol ETSI TS102 361 1 2 3 Receiver Sensitivity Analog 0 3 V 12 dB SINAD 0 22 V Typical 12 dB SINAD 0 4 V 20 dB SINAD Digital 0 3 V BER5 Adjacent Channel Selectivity TIA 6...

Page 228: ...Bm Environment Operating Temperature 30 to 60 Storage Temperature 40 to 85 ESD IEC 61000 4 2 level4 8 kV contact 15 kV air American Military Standard MIL STD 810 C D E F G Dust Water Protection IP54 H...

Page 229: ...rst Fix Hot Start 10s Horizontal Accuracy 10 m Note All Specifications are tested according to applicable standards and subject to change without notice due to continuous development 4 2 Blind Spot No...

Page 230: ...DATA U231 5VD SPK SPK GPIO GPIO GPIO McBSP FILTER USB DP USB DM FLASH D p1 P5 C2 P4 Switch P3 Menu C1 Back P2 Down C0 R2 R1 R0 Keys Matrix FLASH A1 FLASH WE FLASH OE RS A B S UART2 GPIO EMER P6 C3 C4...

Page 231: ...is fed to the serial to parallel converter IC U1 and then is output by U302 RX status is indicated by green LED and TX status by red LED Backlight is activated upon any key press The red and green LE...

Page 232: ...U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto baterry Voltage 13 6 15 9V3A 9V1A 9V1A 5VA 4V3A 3V3A 5VA 3V3A 1V6D 5VD 3V3D 1V8D 3V3DP 3V3A 5VA 5VA Both the baseba...

Page 233: ...l signal PWB to power off the radio is detected by U302 which then controls PWR_CTRL to output low level Afterwards the radio becomes powered off Ignition Sense The mobile radio can be turned on when...

Page 234: ...are completed Clock Option Board U231 U302 32 768KHz 32K 32K_IN VSS CLK32K_IN APLL 19 2MHz 9 6MHz DAC U100 19 2MHz U701 19 2MHz Input Clock The 32K clock provided by X375 is mainly used for timing an...

Page 235: ...external devices at most generally transmitting control and status messages of external devices and reading data from ROM Its maximum clock frequency is a quarter of system clock frequency In this ca...

Page 236: ...interfaces including MCBSP1 MCBSP2 and MCBSP3 which are compatible with various interfaces MCBSP1 is connected to the interface I2C of audio processor U231 to realize two way transmission of digital...

Page 237: ...on with GPS module UART2 is used for communication with front panel GPIO17 and GPIO18 UART3 is used for communication with the Option Board and accessory connector USB Interface USB DM USB PUEN U302 U...

Page 238: ...ESET OUT I O I O I O O O VIH MIN 0 7VDD VIL MAX 0 3VDD VOH MIN 0 8VDD VOL MAX 0 22VDD GPIO5 output signal of resetting the option board GPIO4 GPIO5 Unidirectional output interfaces They require their...

Page 239: ...oltage 5 0 V 5 2 3 Audio Module The audio module is used to output RX audio and input relay audio and TX audio which serves as the RX audio path and TX audio path RX Audio Path U302 sends digital audi...

Page 240: ...5 and R264 a bias voltage of about 7 V is provided to the front panel MIC The external MIC is connected to the MIC_HED of the codec U231 as a unidirectional input Both MICs are controlled by Q232 When...

Page 241: ...hat U906 generates the reset signal to reset OMAP Version H The audio amplifier is different compared with Version D and Version F Version L The DC DC conversion circuit is optimized GPS pulse and GPS...

Page 242: ...Pre driver Power Amplifier The pre driver power amplifier is formed by Q805 with variable gain controlled by voltage VGG The input matching circuit is composed of C826 L826 L814 C843 and R824 Driver P...

Page 243: ...is applied to the power control circuit U801 Then U801 outputs the voltage VGG for controlling the gate voltage of Q805 and Q804 ensuring a constant power output The reverse power is coupled to D804...

Page 244: ...18M 71 1M RX_LO 276 65 326 65MHz TV Attenuator 1dB Attenuator Control 10dB Tx Rx Switch Low pass Filter Receiver Front end RF signals feed to the low pass filter to remove out of band signals and are...

Page 245: ...e second LO signal The clock frequency is 18 MHz which is generated by the external LC D702 L715 and C745 resonance loop DSP U302 acquires the audio signal from IF IC Then this signal goes through U30...

Page 246: ...ting the reference frequency Meanwhile the frequency generated by VCO goes into PLL IC U100 for frequency division The resulting frequency will be compared with reference frequency in terms of phase d...

Page 247: ...Antenna LCD Power REB 1315LPx GPS data can be acquired via the programmable GPS key on the front panel of the mobile radio The GPS function is realized via REB 1315LPx module which integrates GPS bas...

Page 248: ...Check power on circuit and peripheral circuits of U902 Check power on circuit and peripheral circuits of U900 and U901 Yes No Yes No Yes Yes No No Yes Yes No No U903 1V8D is normal 7 U919 1V6D is nor...

Page 249: ...aged No GPS circuit is normal Replace GPS module U326 Yes Replace the active antenna No SiRF Demo software displays communication status on the computer Voltage at SMA of GPS antenna connector is norm...

Page 250: ...leshooting flow chart of FGU circuit No Power of Q801 is normal 4 Yes Check Q801 and relevant components No Power of Q805 is normal 5 Check Q805 and relevant components Yes No Power of Q804 is normal...

Page 251: ...ke sure that the back end circuit is disconnected during test 4 The gain is 16 dB and the input signal is 0 dBm at Q801 5 The gain is 15 dB and the input signal is 0 dBm at Q805 6 The gain is 11 dB an...

Page 252: ...ck RX VCO and LO amplifier No Check D6106 T6100 T6101 and peripheral circuits Sensitivity at TP6104 is normal 6 Yes Yes Check Q6102 D6103 D6104 and peripheral circuits Check L809 L813 M801 and periphe...

Page 253: ...and Q103 Yes Check D107 D108 D109 D110 D121 D122 D125 and D126 No TP124 CV is normal 4 Yes PLL U100 is normal 5 Yes No Replace PLL U100 No Check U101 U102 R187 and R171 TP109 feedback is normal 6 Yes...

Page 254: ...Flow Chart UHF3 350 400 MHz 36 4 The CV of TP124 ranges from 0 5 V to 4 5 V 5 PLL U100 is supplied by 5 V and 3 3 V normally 6 The power of the signal from TP109 to PLL is about 15 dBm 7 TP110 outputs...

Page 255: ...low for detailed function definitions 2 PTT input Digital input 3 3 V CMOS PTT input for the palm microphone which is valid at low level 3 External audio output Analog output Load impedance 1 k Vrms 6...

Page 256: ...palm microphone this pin is used for HOOK function when desktop microphone is detected this pin is used for MONITOR function 10 Accessory identification interface 2 Digital input 3 3V CMOS Pin 1 and...

Page 257: ...tibility with other interfaces Users can further develop the radio via this interface The figure and definition of each pin is as follows Pin No Name Type Signal Electrical Performance Description 1 V...

Page 258: ...the external Mic PTT is held down 8 RX Audio Analog signal output Load impedance 1k Vrms 300 mV 10 1 kHz 60 system max deviation Default output is 300 mV The output signal amplitude can be changed by...

Page 259: ...13 ACC_IO2 can compose three accessory identification statuses Please refer to the DB26 Accessory Identification Matrix Table below for detailed function definitions 16 PRGM_IN_PTT Digital input 5V T...

Page 260: ...Note When a pin is marked with 5 V TTL level this pin has the pull up function If the pin needs to be set to high level empty this pin DB26 Accessory Identification Matrix Table composed of Pin 13 an...

Page 261: ...OVCC 1 65 3 3 V adjustable I O port 5 FLM Synchronization signal control port 6 CS Chip select signal 7 RS Register select 8 WR Write signal 9 RD Read signal 10 DB0 Data bus 11 DB1 12 DB2 13 DB3 14 DB...

Page 262: ...gital input 3 External_Audio Analog output 4 USB_D USB data cable 5 GND Ground cable 6 USB_VBUS Power supply 7 MIC_IN Analog input 8 USB_D USB data cable 9 HOOK Hook signal input 10 ACC_IO2 Digital in...

Page 263: ...an or equal to 47 k 11 UART TX UART O UART 13 UART RX I 15 UART CT S I 17 UART RT S O 2 I2C SDA I2C I O I2C 4 I2C SCL O 6 MCBSP D R MCBSP I McBSP Multi channel buffered serial port 8 MCBSP W CLK I O 1...

Page 264: ...igital input output 4 SW B sense Power supply 5 External Alarm Analog voltage output 6 Power Ground Power supply grounding 7 Tx Audio Analog input 8 RX Audio Analog output 9 Spkr Analog output 10 D US...

Page 265: ...iption 1 INT_MIC Audio input 2 MIC_GROUND Audio input grounding 3 ACC_IO1 Accessory identification interface 1 4 USB_VBUS USB power supply 5 HOOK HOOK 6 PTT PTT 7 USB_D USB data cable D 8 USB_D USB da...

Page 266: ...light control IC chip select 25 CLOC Backlight control IC clock 26 DATA Backlight control IC data 27 OE_LCD LCD read enable 28 WE_LCD LCD write enable 29 CS2_LCD LCD chip select 30 F_A1_LCD LCD regist...

Page 267: ...radio to HP8921 via the antenna connector and set HP8921 to TX test mode 2 Open the Tuner software and go to TUNE_DATA TX Reference Oscillator Warp in the left navigation tree Then click the Transmit...

Page 268: ...iation in the left navigation tree Then click the Transmit On button Then set the modulation signal of HP8921 to 100 Hz 4 Adjust the vernier on Tuner until the frequency deviation displayed on HP8921...

Page 269: ...921 via the antenna connector 2 Connect the Audio Out port of the radio to the Audio In port of HP8921 and set HP8921 to RX test mode 3 Set the parameters on the HP8921 as follows Output RF signal 118...

Page 270: ...he items of the radio you need to test the digital RF signal of the mobile radio via Aeroflex 3920 Digital Radio Test set Transmitting Step 1 Connect the mobile radio to Aeroflex 3920 via the antenna...

Page 271: ...X Receiver BER 0 153 Step 3 Select the channel to be tested and click the Start button on Tuner Step 4 Observe the Average Rate displayed on Tuner You can set different Average Num the calculation bas...

Page 272: ...54 9 PCB View MD78X MD78XG PCB View Front Panel Top Layer...

Page 273: ...55 MD78X MD78XG PCB View Front Panel Bottom Layer...

Page 274: ...MD78X MD78XG PCB View Main Board Top Layer 56...

Page 275: ...MD78X MD78XG PCB View Main Board Bottom Layer 57...

Page 276: ...U100 X100 U905 U500 U909 U231 X302 U302 U401 USB Control Head Accessory Level Translator Option board U919 U902 U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto ba...

Page 277: ...Q6102 Gain 6dB Q801 Firstsage Gain 16dB Gain 15dB Gain 11dB Q805 PreDriver Q804 Driver Q802 Q803 Finalstage High Temperature Protection Tx Rx Switch Tx_PORT Rx_PORT Switch s Power 9 1V Harmonic Filter...

Page 278: ...2MX16 Mobile SDRAM 128Mb 8Mx16 JTAG EMIFF JTAG CLK EMIFS 19 2MHz TCXO Mcbsp2_TX Mcbsp2_RX BELL MCLK UART3 Rear Accessory MAP USB GPIOs UART2 or Volume 74HC595 Acc_ID PRGM GPIOs Control Head Clk data c...

Page 279: ...TP33 TP R46 270 R46 270 D4 D4 1 2 D8 D8 4 3 2 1 TP22 TP TP22 TP R24 NC R24 NC C43 0 047uF NC C43 0 047uF NC C13 0 1uF C13 0 1uF R43 1k R43 1k D18 D18 1 3 2 C63 270pF C63 270pF TP6 TP TP6 TP R41 270 R...

Page 280: ...0 01u R258 10K R258 10K R271 100 R271 100 R263 30K R263 30K R241 56K R241 56K Q233 UMC4 NTR Q233 UMC4 NTR 1 2 3 4 5 R252 100K R252 100K R202 10K R202 10K R232 33 R232 33 C248 0 1u C248 0 1u R235 10K R...

Page 281: ...100P C510 100P C512 0 1u C512 0 1u C506 0 01uF C506 0 01uF R529 33K R529 33K R500 100K R500 100K R505 0 R505 0 R502 1K R502 1K RN500 100 4 RN500 100 4 1 2 3 4 5 6 7 8 C523 NC C523 NC U500 U500 DVDD 1...

Page 282: ...6 G5 NC17 K5 NC18 L5 NC19 B6 NC22 G7 NC23 L7 NC24 A8 VSS1 G2 VSS2 J8 NC25 B8 NC21 B7 NC20 L6 NC26 H8 NC27 L8 NC28 M8 R517 33 R517 33 R353 10K R353 10K R322 10K R322 10K R351 10K R351 10K TP4053 TP4053...

Page 283: ...DVDD7 Y16 DVDD8 L21 DVDD9 U21 DVDDRTC V12 LDO FILTER J1 CONF V18 GPIO40 BCLKREQ W15 RTC_ON_NOFF Y12 GPIO23 MCLKREQ R10 OSC32K_OUT AA13 OSC32K_IN V13 CLK32K_IN P13 OSC1_OUT W3 OSC1_IN Y2 C384 0 01u C38...

Page 284: ...LKX N14 GPIO44 UART3 RX SPIF CS3 UWIRE CS3 P15 I2C SCL T18 GPIO48 I2C SDA V20 GPIO11 MCBSP2 CLKR V7 GPIO20 MCBSP2 CLKX Y6 GPIO12 MCBSP2 FSR W6 GPIO21 MCBSP2 FSX W7 GPIO19 MCBSP2 DR AA5 GPIO22 MCBSP2 D...

Page 285: ...R447 10K R447 10K R573 4 7k R573 4 7k R4964 7K R4964 7K C409 100p C409 100p R2 R1 R2 R1 Q409 R2 R1 R2 R1 Q409 1 2 5 3 4 6 U401 U401 FAULT 3 ON 4 IN 5 OUT 1 GND 2 D405 D405 C422 0 1uF C422 0 1uF R437...

Page 286: ...5 0 L409 L409 TP4022 TP4022 D408 D408 1 5 4 3 2 6 C459 NC C459 NC C472 NC C472 NC C463 100p C463 100p J404 J404 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 3...

Page 287: ...7k U909 U909 VDD 1 GND 2 CE 3 NC 4 VOUT 5 R922 NC R922 NC C980 10uF 25V C980 10uF 25V Q920 D45H8G Q920 D45H8G 1 3 2 DTC114EE Q923 DTC114EE Q923 3 2 1 C915 22uF 10V C915 22uF 10V R987 0 R987 0 M8 M8 1...

Page 288: ...C87 0 1u L150 NC L150 NC TP118 PLLSTB TP118 PLLSTB 1 C65 NC C65 NC R166 NC R166 NC R167 33 R167 33 C77 100p C77 100p C82 1000p C82 1000p C92 NC C92 NC R114 56 R114 56 U102 U102 Vin 1 OUT 2 GND 3 Vcc...

Page 289: ...6 8k R132 6 8k C152 4p C152 4p C31 3p C31 3p R185 nc R185 nc C145 NC C145 NC L123 15NH L123 15NH C159 4p C159 4p C15 10p C15 10p C26 3 6p C26 3 6p C185 56p C185 56p C155 12p C155 12p TP123 RX_LO TP123...

Page 290: ...1u C6179 0 1u C6163 7p C6163 7p C6142 47P C6142 47P TP6105 RX TP TP6105 RX TP D6102 D6102 1 2 TP6101 TX TP TP6101 TX TP C6245 NC C6245 NC C6120 1p C6120 1p C6125 NC C6125 NC R6116 0 R6116 0 D6103 D610...

Page 291: ...7 0 1u C754 1u C754 1u Q701 Q701 2 3 1 D702 HVC376B D702 HVC376B 2 1 L705 10u L705 10u C739 100p C739 100p C701 NC C701 NC C728 1000p C728 1000p C733 0 1u C733 0 1u R704 560 R704 560 C769 100p C769 10...

Page 292: ...07 100nH R804 4 7 R804 4 7 C836 2p C836 2p C909 100p C909 100p TP810 TEMP TP810 TEMP 1 R878 NC R878 NC R812 NC R812 NC R847 47K R847 47K Q813 Q813 3 2 1 C824 8pF C824 8pF C861 68pF C861 68pF TP806 Fin...

Page 293: ...001063300000 33 24 C34 B5B 3101054710010 470pF 95 R15 B3G 3001060000000 0 25 C35 B5C 3101054710010 470pF 96 R17 B2H 3001063300000 33 26 C36 B5B 3101054710010 470pF 97 R18 B2G 3001060000000 0 27 C37 B5...

Page 294: ...0 1uF 13 R364 T3A 3001050000000 0 2 C331 T2A 3101081060010 10uF 14 R365 T3C 3001051030000 10k 3 C332 T2A 3101051040010 0 1uF 15 R366 T3C 3001051030000 10k 4 C333 T3A 3101081060010 10uF 16 R368 T3C 30...

Page 295: ...01055600000 56pF 813 L706 T4H 3221506601000 Ferrite bead 43 C158 B7F 3101051800070 18pF 814 L707 T5I 3221506601000 Ferrite bead 44 C159 B7F 3101050500030 5pF 815 L708 B6H 3217107221010 220nH 45 C16 T6...

Page 296: ...100pF 875 Q103 B7F 3408002000080 NPN transistor 105 C257 B5C 3101061050020 1uF 876 Q104 B7F 3403003000060 NPN transistor 106 C258 B5C 3101051040010 0 1uF 877 Q105 B8F 3403999000000 Transistor 107 C259...

Page 297: ...13 B2A 3403008000010 Transistor 165 C311 B5B 3101051040010 0 1uF 936 Q914 B3B 3403008000010 Transistor 166 C32 B8G 3101050500010 5pF 937 Q916 B2A 3599990000610 N MOSFET 167 C325 T8B 3101051040010 0 1u...

Page 298: ...6C 3101051040010 0 1uF 1000 R199 T8G 3001051240000 120k 230 C394 B7B 3101051040010 0 1uF 1001 R2 T8E 3001060000000 0 231 C396 T6B 3101061050020 1uF 1002 R202 B5D 3001051030000 10k 232 C398 B6B 3101051...

Page 299: ...0 10k 292 C468 B8C 3101051010030 100pF 1063 R324 T7C 3001053300010 33 293 C469 B8A 3101051010030 100pF 1064 R326 T6B 3001051030000 10k 294 C473 T8D 3101051040010 0 1uF 1065 R327 B6C 3001053300010 33 2...

Page 300: ...3101052490010 2 4pF 1126 R406 T6C 3001051010000 100 356 C6123 T5J 3001050000000 0 1127 R407 T8C 3001060000000 0 357 C6124 T6J 3101050500000 5pF 1128 R408 T7C 3001053300010 33 358 C6125 T6J 31010502000...

Page 301: ...418 C69 T7F 3110071040000 0 1uF 1189 R473 B2C 3001053300010 33 419 C7 B7F 3101051040010 0 1uF 1190 R474 B2C 3001053300010 33 420 C70 T6F 3110071040000 0 1uF 1191 R475 T2A 3001051030000 10k 421 C701 T...

Page 302: ...4 T5H 3101051010030 100pF 1252 R540 T8D 3001051030000 10k 482 C765 T5H 3101051010030 100pF 1253 R541 T8C 3001051030000 10k 483 C766 T5H 3101051010030 100pF 1254 R543 T7C 3001051030000 10k 484 C767 T5H...

Page 303: ...4 C87 T7E 3101051040010 0 1uF 1315 R6127 T4I 3001051030000 10k 545 C873 T2F 3101080800010 8pF 1316 R6129 B7I 3001063310010 330 546 C874 T1H 3101080300010 3pF 1317 R6130 T7I 3001055120030 5 1K 547 C875...

Page 304: ...71040000 0 1uF 1378 R839 B4H 3001053320000 3 3k 608 C940 B1F 3101066800000 68pF 1379 R841 B4H 3001053330000 33k 609 C942 T4B 3101053310020 330pF 1380 R842 B4I 3001051230000 12k 610 C943 B1F 3101062700...

Page 305: ...1434 R913 T6D 3001054720000 4 7k 664 D126 B7G 3304010100220 Varactor 1435 R917 T5D 3001053340010 330k 665 D127 T7E 3303030100010 Switching diode 1436 R919 T5D 3001051540000 150k 666 D128 B4I 330303010...

Page 306: ...2B 3303240000000 Switching diode 1484 R982 T3C 3001051040000 100k 714 D921 T2A 3302030500030 Zener diode 1485 R983 T6D 3001050000000 0 715 D922 T7C 3303010500090 Switching diode 1486 R984 B3A 30010522...

Page 307: ...L169 T8G 3210306560000 56nH 1530 U917 B2A 3609006003050 Reset IC 760 L171 T7G 3210306150000 15nH 1531 U918 B7D 3608015000210 Power management IC 761 L173 T7G 3212106120000 12nH 1532 U919 T5D 360801000...

Page 308: ...F 815 L6217 T6J 3210305270000 27nH 39 C154 B7G 3101054700010 47pF 816 L7 T7G 3221506601000 Ferrite bead 40 C155 B7G 3101060900010 9pF 817 L701 T6H 3221506601000 Ferrite bead 41 C156 B6E 3101052210010...

Page 309: ...uF 878 L930 T4D 3241799103000 Power inductor 10uH 102 C254 B5C 3101052210010 220pF 879 L931 T5D 3213099472000 4 7uH 103 C255 B5C 3101051050000 1uF 880 L940 T2D 3221513600000 Ferrite bead 104 C256 B5D...

Page 310: ...162 C309 B7A 3101051010030 100pF 939 Q905 B3A 3499000000150 Transistor 163 C31 B7F 3101060300010 3pF 940 Q906 B3B 3414001000020 PNP transistor 164 C310 T6A 3101051050000 1uF 941 Q908 B3B 340300800001...

Page 311: ...90 B6C 3101051010030 100pF 1003 R190 T7G 3001051010040 100 227 C391 T7C 3101051040010 0 1uF 1004 R192 B7G 3001061810000 180 228 C392 B6C 3101051040010 0 1uF 1005 R194 B8H 3001051230000 12k 229 C393 B6...

Page 312: ...00010 33 289 C465 B8C 3101051010030 100pF 1066 R295 B5A 3001051020000 1k 290 C466 B8C 3101051010030 100pF 1067 R296 B6B 3001051040000 100k 291 C467 B8C 3101051010030 100pF 1068 R3 T7F 3001050000000 0...

Page 313: ...101054710010 470pF 1129 R4 T8E 3001061010000 100 353 C6120 T4J 3101050300000 3pF 1130 R400 T7D 3001051030000 10k 354 C6121 T4J 3101050300000 3pF 1131 R401 B7B 3001051520000 1 5k 355 C6122 T5J 31010524...

Page 314: ...C66 T6F 3110071040000 0 1uF 1192 R466 B2C 3001051030000 10k 416 C67 T7F 3110071040000 0 1uF 1193 R467 B2C 3001053300010 33 417 C68 T6F 3110071040000 0 1uF 1194 R468 T2B 3001054720000 4 7k 418 C69 T7F...

Page 315: ...T6I 3101051040010 0 1uF 1255 R532 T8C 3001051030000 10k 479 C76 T8F 3101051010030 100pF 1256 R533 B7B 3001053300010 33 480 C763 T5H 3101051010030 100pF 1257 R534 B8C 3001051030000 10k 481 C764 T5H 31...

Page 316: ...3101062200010 22pF 1318 R6120 T7I 3001055100010 51 542 C859 T5F 3101072000010 20pF 1319 R6121 B7H 3001051800000 18 543 C86 T7F 3101051040010 0 1uF 1320 R6122 B7H 3001051220000 1 2k 544 C860 T5F 310107...

Page 317: ...1071060010 10uF 1381 R825 T3I 3001113300000 33 605 C927 T4D 3101061040010 0 1uF 1382 R826 T6F 3001061000000 10 606 C928 T5H 3101081060010 10uF 1383 R827 T6E 3001062710000 270 607 C93 T7F 3101051010030...

Page 318: ...10100220 Varactor 1440 R902 B3G 3001050000000 0 664 D110 B6G 3304010100220 Varactor 1441 R904 B5C 3001050000000 0 665 D111 B7E 3304010100220 Varactor 1442 R905 B5C 3001053330000 33k 666 D112 B7E 33040...

Page 319: ...tifier diode 1490 R974 B3A 3001062720000 2 7k 714 D910 B2A 3302030500010 Zener diode 1491 R975 B3A 3001052030000 20k 715 D911 B2A 3302030500010 Zener diode 1492 R976 T7D 3001050000000 0 716 D914 B3A 3...

Page 320: ...0 39nH 1534 U901 T2A 3608015000180 Power management IC 758 L140 B7G 3217607471000 470nH 1535 U902 T5C 3608010000350 Power management IC 759 L147 T7B 3210406471000 470nH 1536 U903 T5B 3608015000170 Pow...

Page 321: ...UHF5 806 941 MHz...

Page 322: ...Module 14 5 2 2 Control Module 15 5 2 3 Audio Module 22 5 3 RF Section 23 5 3 1 Transmitter Circuit 23 5 3 2 Receiver Circuit 25 5 3 3 FGU Circuit 26 5 4 GPS Circuit Section 28 6 Troubleshooting Flow...

Page 323: ...Contents UHF5 806MHz 941MHz ii 10 Block Diagram 57 11 Schematic Diagram 60 12 Parts List 75 12 1 Front Panel 75 12 2 GPS Circuit 76 12 3 Main Board 76...

Page 324: ...Key 11 Redial Answer Call Key 5 Back Group Call Management Key 12 Programmable Keys 6 Dial back End Home Screen Key 13 Microphone Connector 7 Power On Off Key 14 Microphone Installation Index Note Th...

Page 325: ...ontrols UHF5 806MHz 941MHz 2 Rear Panel No Part Name No Part Name 1 RF Antenna Connector 3 Accessory Connector 2 Power Inlet 4 GPS Antenna Connector Note The GPS antenna interface is only available fo...

Page 326: ...ower cord and loosen the two screws to remove the radio Step 2 Remove the antenna Step 3 Loosen the three screws to remove the front panel Then remove the FFC Step 4 Detach the volume control knob and...

Page 327: ...sen the eleven screws to remove the upper shield cover Step 7 Loosen the screw fixing the antenna connector and two screws fixing the PA module Then take the PCB out 2 2 Reassembling the Radio To reas...

Page 328: ...l cable 1 30 6100533101000 Waterproof ring for aluminum chassis 1 5 5208010100010 Connector male 1 31 6300126000000 Upper cover of the aluminum chassis 1 6 6001079000000 Light guide plate for keys 1 3...

Page 329: ...male 1 18 6201739000000 Inner lining for knob 1 44 3103994770150 Electrolytic capacitor 1 19 6000876000000 Encoder knob 1 45 7212002500000 Nut 1 20 6100493000000 Power on off key 1 46 6100531100000 W...

Page 330: ...UHF5 806MHz 941MHz Exploded View and Packing Guide 7 3 2 Packing Guide...

Page 331: ...4 each with a maximum of 16 channels Channel Spacing 12 5 kHz 20 kHz 25 kHz Operating Voltage 13 6V 15 DC Current Drain Standby 0 6 A Receive 2 0 A Transmit 50 W 12 A Frequency Stability 1 5 ppm Anten...

Page 332: ...kHz 43 dB 20 kHz 45 dB 25 kHz Adjacent Channel Power 60 dB 12 5 kHz 70 dB 20 25 kHz Audio Response 1 dB to 3 dB Audio Distortion 3 Digital Vocoder Type AMBE or SELP Digital Protocol ETSI TS102 361 1 2...

Page 333: ...xternal 8 load 7 5 W Max Audio Power Internal 20 load 8 W External 8 load 20 W Rated Audio Distortion 3 Audio Response 1 dB to 3 dB Conducted Spurious Emission 57 dBm Environment Operating Temperature...

Page 334: ...isible at a nominal 130dBm signal strength TTFF Time To First Fix Cold Start 60s TTFF Time To First Fix Hot Start 10s Horizontal Accuracy 10 m Note All Specifications are tested according to applicabl...

Page 335: ...DATA U231 5VD SPK SPK GPIO GPIO GPIO McBSP FILTER USB DP USB DM FLASH D p1 P5 C2 P4 Switch P3 Menu C1 Back P2 Down C0 R2 R1 R0 Keys Matrix FLASH A1 FLASH WE FLASH OE RS A B S UART2 GPIO EMER P6 C3 C4...

Page 336: ...is fed to the serial to parallel converter IC U1 and then is output by U302 RX status is indicated by green LED and TX status by red LED Backlight is activated upon any key press The red and green LED...

Page 337: ...U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto baterry Voltage 13 6 15 9V3A 9V1A 9V1A 5VA 4V3A 3V3A 5VA 3V3A 1V6D 5VD 3V3D 1V8D 3V3DP 3V3A 5VA 5VA Both the baseb...

Page 338: ...el signal PWB to power off the radio is detected by U302 which then controls PWR_CTRL to output low level Afterwards the radio becomes powered off Ignition Sense The mobile radio can be turned on when...

Page 339: ...s are completed Clock Option Board U231 U302 32 768KHz 32K 32K_IN VSS CLK32K_IN APLL 19 2MHz 9 6MHz DAC U100 19 2MHz U701 19 2MHz Input Clock The 32K clock provided by X375 is mainly used for timing a...

Page 340: ...r external devices at most generally transmitting control and status messages of external devices and reading data from ROM Its maximum clock frequency is a quarter of system clock frequency In this c...

Page 341: ...P interfaces including MCBSP1 MCBSP2 and MCBSP3 which are compatible with various interfaces MCBSP1 is connected to the interface I2C of audio processor U231 to realize two way transmission of digital...

Page 342: ...ion with GPS module UART2 is used for communication with front panel GPIO17 and GPIO18 UART3 is used for communication with the Option Board and accessory connector USB Interface USB DM USB PUEN U302...

Page 343: ...ESET OUT I O I O I O O O VIH MIN 0 7VDD VIL MAX 0 3VDD VOH MIN 0 8VDD VOL MAX 0 22VDD GPIO5 output signal of resetting the option board GPIO4 GPIO5 Unidirectional output interfaces They require their...

Page 344: ...ription 21 Pin No Signal Function I O of the Radio Voltage Option Board VDD 3 3 V Remarks 18 AF MB TO OB AF O 80 mV standard output from the main board to the option board MAX 700 mV 19 DGND DGND 20 3...

Page 345: ...PCM data into analog audio data via DAC U231 provides two outputs SPK1 and SPK2 SPK1 is amplified by U238 and then is fed to the PA U201 to derive two outputs of received audio which will be applied t...

Page 346: ...is amplified and then is output as the two paths of audio PUB_Address1 and PUB_Address2 5 3 RF Section 5 3 1 Transmitter Circuit The transmitter circuit is composed of power amplifier circuit and powe...

Page 347: ...y the same bias network Their static bias current can be adjusted via software to ensure output consistency Antenna Switch The antenna switch is used to switch between the transmitter circuit and the...

Page 348: ...29 and then the preset voltage will be subsequently changed to lower TX power and to protect the PA from over heating Pressure Pad Switch The power control circuit includes a pressure pad switch SW1 w...

Page 349: ...PE SYNCB DOUTA DOUTB FS CLKOUT MXOP MXON IF2P IF2N GCP GCN IFIN FREF SSI TO OMAP The first IF signal 73 35 MHz output by the IF amplifier goes into IF IC via Pin 47 where the signal is converted to t...

Page 350: ...8 Bit Main Divider Main Divider Main Phase Freq Detector and Charge Pump Reference Frequency Oscillator Reference Frequency Oscillator M u x Mux_out Ref Data Clock CS Mod_in Fvco_main Fvco_main CPout_...

Page 351: ...h Q100 and Q106 are also used to receive LO signals Q101 Q105 Q108 and Q112 control the operating frequency of the VCO U105 isolates the output of VCO circuit while Q107 and Q109 constitute a two stag...

Page 352: ...2 Check power on circuit and peripheral circuits of U902 Check power on circuit and peripheral circuits of U900 and U901 Yes No Yes No Yes Yes No No Yes Yes No No U903 1V8D is normal 7 U919 1V6D is no...

Page 353: ...maged No GPS circuit is normal Replace GPS module U326 Yes Replace the active antenna No SiRF Demo software displays communication status on the computer Voltage at SMA of GPS antenna connector is nor...

Page 354: ...l 3 Yes Refer to troubleshooting flow chart of FGU circuit No Power of Q111 is normal 4 Yes Check Q111 and relevant components No Power of Q805 is normal 5 Check Q805 and relevant components Yes No Po...

Page 355: ...outputs 9V3A Check the power on circuit No Q902 outputs 9V1A Yes Check Q902 and Q903 No Front panel outputs is normal 1 Yes Replace the front panel No Input an IF signal 73 35 MHz and test whether the...

Page 356: ...is defective 2 Use the communication test set to apply a 73 35 MHz IF signal at the mixer and sensitivity is about 110 dBm 3 There is a second LO signal 71 1MHz at TP704 4 The sensitivity at C6207 is...

Page 357: ...6 Yes Yes Check the feedback circuit Check L809 L813 L810 M801 and peripheral circuit Yes No End Q106 Q110 Q100 and Q103 work normally 3 No Replace Q108 Q112 Q101 and Q105 Oscillates 19 2 MHz 7 Yes C...

Page 358: ...trix Table below for detailed function definitions 2 PTT input Digital input 3 3V CMOS PTT input for the palm microphone which is valid at low level 3 External audio output Analog output Load impedanc...

Page 359: ...MONITOR functions Press this key the level changes from high to low When palm microphone is detected or press the key of the palm microphone this pin is used for HOOK function when desktop microphone...

Page 360: ...ry Interface DB26 accessory interface namely the 26 pin further development interface on the rear panel is mainly used for accessory connection of mobile radio or compatibility with other interfaces U...

Page 361: ...1 kHz 60 system max deviation This pin is used for signal input of external MIC The audio path is valid when the external Mic PTT is held down 8 RX Audio Analog signal output Load impedance 1 k Vrms...

Page 362: ...essory identification interface high level by default This pin and Pin 13 ACC_IO2 can compose three accessory identification statuses Please refer to the DB26 Accessory Identification Matrix Table bel...

Page 363: ...Pin Analog voltage input Ignition voltage input 7V Input pin for ignition voltage Note When a pin is marked with 5 V TTL level this pin has the pull up function If the pin needs to be set to high lev...

Page 364: ...VCI 2 5 3 3 V adjustable port 3 VCI 2 5 3 3 V adjustable port 4 IOVCC 1 65 3 3 V adjustable I O port 5 FLM Synchronization signal control port 6 CS Chip select signal 7 RS Register select 8 WR Write...

Page 365: ..._K3 J4 Aviation Interface of Front Panel Pin No Name Description 1 ACC_IO1 Digital input 2 PTT_IN Digital input 3 External_Audio Analog output 4 USB_D USB data cable 5 GND Ground cable 6 USB_VBUS Powe...

Page 366: ...GPIO4 GPIO5 Unidirectional output interfaces They require their input resistances are greater than or equal to 47 k 3 GPIO2 5 GPIO3 7 GPIO4 O 9 GPIO5 RESET OUT O 11 UART TX UART O UART 13 UART RX I 1...

Page 367: ...wer O Voltage 5 0 V J403 Pin Interface Pin No Name Description 1 Vbus USB Power supply 5 V 2 Ground Ground cable 3 GP5_3 Digital input output 4 SW B sense Power supply 5 External Alarm Analog voltage...

Page 368: ...output 24 AUX Audio Out 1 Analog output 25 AUX Audio Out 2 Analog output 26 Ign Sense Analog voltage input J404 Front Panel Interface Pin No Name Description 1 INT_MIC Audio input 2 MIC_GROUND Audio...

Page 369: ...VD Power supply 16 PRST Reset signal 17 KB_C0 Matrix keyboard 18 KB_C1 19 KB_C2 20 KB_C3 21 KB_R0 22 KB_R1 23 KB_R2 24 CSLED Backlight control IC chip select 25 CLOCK Backlight control IC clock 26 DAT...

Page 370: ...UHF5 806MHz 941MHz Interface Definition 47 Pin No Name Description 37 F_D1 LCD data bus 38 F_D0 39 GND Grounding 40 PWB_IN Power On Off signal...

Page 371: ...t the radio to HP8921 via the antenna connector and set HP8921 to TX test mode 2 Open the Tuner software and go to TUNE_DATA TX Reference Oscillator Warp in the left navigation tree Then click the Tra...

Page 372: ...phasis off 3 Open the Tuner software and go to TUNE_DATA TX Transmit to Deviation in the left navigation tree Then click the Transmit On button Then set the modulation signal of HP8921 to 100 Hz 4 Adj...

Page 373: ...tree 3 Click the Save button to save the existing value to the radio RX Section Front end Filter 1 Connect the radio to HP8921 via the antenna connector 2 Connect the Audio Out port of the radio to th...

Page 374: ...e existing value to the radio 8 2 2 Testing the Radio After tuning all the items of the radio you need to test the digital RF signal of the mobile radio via Aeroflex 3920 Digital Radio Test set Transm...

Page 375: ...ware and go to TEST RX Receiver BER 0 153 Step 3 Select the channel to be tested and click the Start button on Tuner Step 4 Observe the Average Rate displayed on Tuner You can set different Average Nu...

Page 376: ...53 9 PCB View MD78X MD78XG PCB View Front Panel Top Layer...

Page 377: ...54 MD78X MD78XG PCB View Front Panel Bottom Layer...

Page 378: ...55 MD78X MD78XG PCB View Main Board Top Layer...

Page 379: ...56 MD78X MD78XG PCB View Main Board Bottom Layer...

Page 380: ...X100 U905 U500 U909 U231 X302 U302 U401 USB Control Head Accessory Level Translator Option board U919 U902 U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto baterry...

Page 381: ...U100 PLL IC TX_VCO_L L P F RX_VCO_L TX_VCO_H RX_VCO_H X100 VCTCXO U105 U101 SW U102 SW MOD H CLK STB DATA LD Fast Lock SW Fast Lock SW U500 TX 935 941MHz Rx 924 35 943 35MHz VCO_Feed back LPF S P I M...

Page 382: ...2MX16 Mobile SDRAM 128Mb 8Mx16 JTAG EMIFF JTAG CLK EMIFS 19 2MHz TCXO Mcbsp2_TX Mcbsp2_RX BELL MCLK UART3 Rear Accessory MAP USB GPIOs UART2 or Volume 74HC595 Acc_ID PRGM GPIOs Control Head Clk data c...

Page 383: ...TP33 TP R46 270 R46 270 D4 D4 1 2 D8 D8 4 3 2 1 TP22 TP TP22 TP R24 NC R24 NC C43 0 047uF NC C43 0 047uF NC C13 0 1uF C13 0 1uF R43 1k R43 1k D18 D18 1 3 2 C63 270pF C63 270pF TP6 TP TP6 TP R41 270 R...

Page 384: ...0 1u TP232 TP232 1 R276 100K R276 100K C261 0 01u C261 0 01u R258 10K R258 10K R271 100 R271 100 R263 30K R263 30K R241 56K R241 56K C204 47pF C204 47pF Q233 UMC4N Q233 UMC4N 1 2 3 4 5 R252 100K R252...

Page 385: ...C471 0 1u R508 NC R508 NC C518 100P C518 100P C501 330p C501 330p R505 0 R505 0 C506 0 01uF C506 0 01uF R514 100K R514 100K C513 1000P C513 1000P R567 0 R567 0 R509 10k R509 10k C502 3300p C502 3300p...

Page 386: ...10K R316 10K R536 0 R536 0 TP308 TP308 1 TP4046 TP4046 R444 nc R444 nc R519 33 R519 33 R441 10K R441 10K TP4049 TP4049 TP4054 TP4054 R518 33 R518 33 TP310 TP310 1 U232 U232 DQ0 A8 DQ1 B9 DQ2 B8 DQ3 C9...

Page 387: ...K R390 10K TP375 MCLK TP375 MCLK 1 C398 0 1u C398 0 1u R396 4 7K R396 4 7K L151 470n L151 470n L912 BLM18PG300SN1D L912 BLM18PG300SN1D R377 10K R377 10K R393 10K R393 10K C340 0 1u C340 0 1u R385 10K...

Page 388: ...TX UART1 IRTX Y14 GPIO18 UART2 RX R9 GPIO17 UART2 TX V6 UART2 BCLK SYS_CLK_IN Y4 GPIO45 UART3 TX SPIF CS0 MCBSP3 CLKX N14 GPIO44 UART3 RX SPIF CS3 UWIRE CS3 P15 I2C SCL T18 GPIO48 I2C SDA V20 GPIO11 M...

Page 389: ...R443 10K C407 0 1u C407 0 1u C432 220p C432 220p D404 MMBZ20VALT1G D404 MMBZ20VALT1G C481 NC C481 NC R538 10K R538 10K C410 100p C410 100p C480 100p C480 100p R560 33k R560 33k R415 33 R415 33 R448 4...

Page 390: ...02 L402 L409 L409 TP4022 TP4022 D408 D408 1 5 4 3 2 6 C459 NC C459 NC C472 100PF C472 100PF C463 100p C463 100p J404 J404 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29...

Page 391: ...p C937 1000p D913 D913 1 2 R967 NC R967 NC TP4035 TP4035 C962 1u C962 1u R938 10K R938 10K R906 47k R906 47k C903 470uf C903 470uf 1 2 C965 2 2u C965 2 2u L916 BLM41PG600SN1 L916 BLM41PG600SN1 1 2 C10...

Page 392: ...C74 0 1U R175 10 R175 10 C1015 470p C1015 470p C87 0 1u C87 0 1u TP118 PLLSTB TP118 PLLSTB 1 R166 NC R166 NC R167 33 R167 33 C77 20p C77 20p C82 1000p C82 1000p C92 NC C92 NC R114 330 R114 330 U102 U1...

Page 393: ...470n L118 470n C208 10P C208 10P R203 10R R203 10R C194 220p C194 220p C146 NC C146 NC R132 3 3k R132 3 3k L137 8n L137 8n C197 220p C197 220p C147 220p C147 220p D120 D120 2 1 D118 NC D118 NC 2 1 C40...

Page 394: ...9 NC R6149 NC C6193 NC C6193 NC C6234 68p C6234 68p R6145 150 R6145 150 R6135 1 2K R6135 1 2K C6168 0 5pF C6168 0 5pF C6198 15p C6198 15p CGND OUT IN GND Z6105 CGND OUT IN GND Z6105 1 4 2 3 5 6 C6135...

Page 395: ...0 1u C737 0 1u C754 1u C754 1u Q701 2SC3356 Q701 2SC3356 2 3 1 D702 D702 2 1 L705 10u L705 10u C739 100p C739 100p C701 NC C701 NC C728 1000p C728 1000p C733 0 1u C733 0 1u R704 560 R704 560 C769 100...

Page 396: ...NC C809 220p C809 220p C892 39p C892 39p C991 NC C991 NC L814 7PF L814 7PF C990 NC C990 NC C866 6PF C866 6PF C885 10UF C885 10UF L828 10NH L828 10NH C1035 NC C1035 NC C842 1pF C842 1pF R877 47K R877 4...

Page 397: ...39p C898 39p R883 56k R883 56k R902 0ohm R902 0ohm R873 NC R873 NC R900 NC R900 NC R895 56k R895 56k t RT804 100k t RT804 100k 1 2 R822 27ohm R822 27ohm C858 270ohm C858 270ohm D129 D129 1 2 D804 D804...

Page 398: ...3001063300000 33 24 C34 B5B 3101054710010 470pF 95 R15 B3G 3001060000000 0 25 C35 B5C 3101054710010 470pF 96 R17 B2H 3001063300000 33 26 C36 B5B 3101054710010 470pF 97 R18 B2G 3001060000000 0 27 C37 B...

Page 399: ...10 0 1uF 11 R363 T3A 3001050000000 0 2 C331 T2A 3101081060010 10uF 12 R364 T3A 3001050000000 0 3 C332 T2A 3101051040010 0 1uF 13 R365 T3C 3001051030000 10k 4 C333 T3A 3101081060010 10uF 14 R366 T3C 30...

Page 400: ...1 5pF 867 L418 T2C 3221505121000 Ferrite bead 44 C1051 T2G 3101372400000 24pF 868 L5 B7G 3217607471000 470nH 45 C1052 B6D 3101081060010 10uF 869 L500 B7C 3211506101000 Ferrite bead 46 C106 T7G 3212105...

Page 401: ...220pF 931 L806 B4J 3001060000000 0 108 C198 B8G 3101050200010 2pF 932 L808 T5E 3221513600000 Ferrite bead 109 C199 B7G 3101062290000 2 2pF 933 L809 T3H 3233099050000 Air core coil 5 0nH 110 C2 T7G 31...

Page 402: ...B2B 3413001000010 PNP transistor 171 C268 B6A 3101064740000 0 47uF 995 Q401 B2A 3403008000010 Transistor 172 C269 B5C 3101054700010 47pF 996 Q402 T2B 3403008000010 Transistor 173 C27 B8G 310105059001...

Page 403: ...1056 R129 B7E 3001052210000 220 233 C342 B6C 3101051010030 100pF 1057 R131 B7F 3001053320000 3 3k 234 C343 T7C 3101051010030 100pF 1058 R132 B7E 3001053320000 3 3k 235 C344 T7D 3101051010030 100pF 105...

Page 404: ...1051010030 100pF 1120 R247 B5B 3001051040010 100k 297 C413 T8C 3101051010030 100pF 1121 R248 B5B 3001051040010 100k 298 C414 T7C 3101051010030 100pF 1122 R250 B5B 3001051530000 15k 299 C415 T8C 310105...

Page 405: ...359 C48 T8G 3101051020010 1000pF 1183 R356 B7A 3001050000000 0 360 C480 T8C 3101051010030 100pF 1184 R357 T7C 3001053300010 33 361 C483 B2B 3101051040010 0 1uF 1185 R358 B7B 3001051000000 10 362 C484...

Page 406: ...01050200010 2pF 1246 R426 T8A 3001050000000 0 423 C6149 B6J 3101050200010 2pF 1247 R427 T2B 3001051030000 10k 424 C6150 B6I 3199052290000 2 2pF 1248 R428 T2B 3001054720000 4 7k 425 C6151 B6J 310105339...

Page 407: ...10 33 485 C70 T7G 3110071040000 0 1uF 1309 R493 T2A 3001061020010 1k 486 C702 T6H 3101051030020 0 01uF 1310 R495 B8C 3001053300010 33 487 C703 T6H 3101060300010 3pF 1311 R496 B3C 3001054720000 4 7k 48...

Page 408: ...T6H 3101051010030 100pF 1372 R559 B2B 3001053330010 33k 549 C77 T7E 3101052000020 20pF 1373 R560 B2B 3001053330010 33k 550 C78 T8G 3110071040000 0 1uF 1374 R561 B2C 3001053330010 33k 551 C79 T8F 3101...

Page 409: ...70 611 C89 T8E 3101071060000 10uF 1435 R713 T5H 3001051040000 100k 612 C890 B3I 3101053900000 39pF 1436 R714 B5H 3001051820000 1 8k 613 C891 T3I 3101051210000 120pF 1437 R715 T5H 3001053300010 33 614...

Page 410: ...50 T2D 3101051040010 0 1uF 1498 R869 B4H 3001051830000 18k 675 C951 T4C 3110992270000 220uF 1499 R870 B4H 3001051030000 10k 676 C952 T3C 3101061030010 0 01uF 1500 R872 B4H 3001051840000 180k 677 C953...

Page 411: ...020010 1k 732 D120 B8E 3304010100220 Varactor 1556 R949 B2A 3001054730000 47k 733 D121 B8F 3304010100220 Varactor 1557 R950 T3C 3001051030000 10k 734 D122 B8F 3304010100220 Varactor 1558 R951 T5D 3001...

Page 412: ...399030000010 PIN diode 1601 U238 B6B 3605008005070 Operational amplifier 778 D910 B2A 3302030500010 Zener diode 1602 U302 T6B 3610010000010 MCU 779 D911 B2A 3303240000000 Switching diode 1603 U326 T3B...

Page 413: ...F 3237199080000 Air core coil 8nH 1634 X100 T7E 3701019250030 TCXO 811 L126 B8F 3217607330010 33nH 1635 X302 T7B 3701019250040 TCXO 812 L127 B7E 3217607471000 470nH 1636 X375 T8B 3701327610060 Crystal...

Page 414: ...VHF 136 174 MHz...

Page 415: ...ly Module 14 5 2 2 Control Module 15 5 2 3 Audio Module 21 5 3 RF Section 22 5 3 1 Transmitter Circuit 22 5 3 2 Receiver Circuit 25 5 3 3 FGU Circuit 26 5 4 GPS Circuit 28 6 Troubleshooting Flow Chart...

Page 416: ...Contents VHF 136MHz 174MHz ii 10 Block Diagram 56 11 Schematic Diagram 53 12 Parts List 73 12 1 Front Panel 73 12 2 GPS Circuit 74 12 3 Main Board 25W 74 12 4 Main Board 50W 88...

Page 417: ...Key 11 Redial Answer Call Key 5 Back Group Call Management Key 12 Programmable Keys 6 Dial back End Home Screen Key 13 Microphone Connector 7 Power On Off Key 14 Microphone Installation Index Note Th...

Page 418: ...Product Controls VHF 136MHz 174MHz 2 Rear Panel No Part Name No Part Name 1 RF Antenna Connector 3 Accessory Connector 2 Power Inlet 4 GPS Antenna Connector...

Page 419: ...the power cord and antenna Step 2 Loosen the two screws to remove the radio Step 3 Loosen the three screws to remove the front panel Then remove the FFC Step 4 Detach the volume control knob and loose...

Page 420: ...sen the eleven screws to remove the upper shield cover Step 7 Loosen the screw fixing the antenna connector and two screws fixing the PA module Then take the PCB out 2 2 Reassembling the Radio To reas...

Page 421: ...for aluminum chassis 1 5 5208010100010 Connector male 1 31 6300126000000 Aluminum upper cover 1 6 6001079000000 Light guide plate for keys 1 32 7103015000000 Machine screw 11 7 7300048000000 Metal dom...

Page 422: ...0150 Electrolytic capacitor 1 19 6000876000000 Encoder knob 1 45 7212002500000 Nut 1 20 6100493000000 Power on off key 1 46 6100531100000 Waterproof ring for antenna connector 1 21 6100404000000 Emerg...

Page 423: ...VHF 136MHz 174MHz Exploded View and Packing Guide 7 3 2 Packing Guide...

Page 424: ...Standby 0 6 A Receive 2 0 A Transmit 5 W 5 A 25 W 8 A 50 W 12 A Frequency Stability 1 5 ppm Antenna Impedance 50 Dimensions H W D 60mm 174mm 200mm 2 4inch 6 9inch 7 9inch Weight 1 7kg 3 75lbs LCD Disp...

Page 425: ...Type AMBE or SELP Digital Protocol ETSI TS102 361 1 2 3 Receiver Sensitivity Analog 0 3 V 12 dB SINAD 0 22 V Typical 12 dB SINAD 0 4 V 20 dB SINAD Digital 0 3 V BER5 Adjacent Channel Selectivity TIA 6...

Page 426: ...Bm Environment Operating Temperature 30 to 60 Storage Temperature 40 to 85 ESD IEC 61000 4 2 Level 4 8 kV contact 15 kV air American Military Standard MIL STD 810 C D E F G Dust Water Protection IP54...

Page 427: ...First Fix Hot Start 10s Horizontal Accuracy 10 m Note All Specifications are tested according to applicable standards and subject to change without notice due to continuous development 4 2 Blind Spot...

Page 428: ...DATA U231 5VD SPK SPK GPIO GPIO GPIO McBSP FILTER USB DP USB DM FLASH D p1 P5 C2 P4 Switch P3 Menu C1 Back P2 Down C0 R2 R1 R0 Keys Matrix FLASH A1 FLASH WE FLASH OE RS A B S UART2 GPIO EMER P6 C3 C4...

Page 429: ...fed to the serial to parallel converter IC and then is output by U302 RX status is indicated by green LED and TX status by red LED Backlight is activated upon any key press The red and green LEDs in...

Page 430: ...U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto baterry Voltage 13 6 15 9V3A 9V1A 9V1A 5VA 4V3A 3V3A 5VA 3V3A 1V6D 5VD 3V3D 1V8D 3V3DP 3V3A 5VA 5VA Both the baseb...

Page 431: ...low level signal PWB to power off the radio is detected by U302 which then controls PWR_CTRL to output low level Afterwards the radio becomes powered off Ignition Sense The mobile radio can be turned...

Page 432: ...of the mobile radio Its frequency 32 768 kHz is divided by U302 32768 times in all to 1Hz for counting seconds The system clock 19 2 MHz is generated by an external crystal oscillator Output Clock The...

Page 433: ...SPI SPIF SCK SPIF DOUT U302 SPIF CS2 PE U701 PC PD SPI of the processor U302 operates in Master mode and it is controlled by MPU or DMA In Master Mode U302 can provide four chip select signals of whi...

Page 434: ...of digital voice and data MCBSP2 uses independent clock and frame synchronization for transmission and reception The SSI of U701 is connected to the RX end of MCBSP2 for U302 U500 is connected to the...

Page 435: ...with GPS module UART2 is used for communication with front panel GPIO17 and GPIO18 UART3 is used for communication with the Option Board and accessory connector USB Interface USB DM USB PUEN U302 USB...

Page 436: ...RESET OUT I O I O I O O O VIH MIN 0 7VDD VIL MAX 0 3VDD VOH MIN 0 8VDD VOL MAX 0 22VDD GPIO5 output signal of resetting the option board GPIO4 GPIO5 Uni directional output interfaces They require thei...

Page 437: ...ltage 5 0 V 5 2 3 Audio Module The audio module is used to output RX audio and input relay audio and TX audio which serves as the RX audio path and TX audio path RX Audio Path U302 sends digital audio...

Page 438: ...ontrolled by Q232 When the internal MIC is active EXT_MIC_EN is at low level bias voltage of external MIC is disconnected and the ADC in U231 samples voltage at the MICIN_HND When the external MIC is...

Page 439: ...circuit Pre driver Power Amplifier The pre driver power amplifier is formed by Q805 with variable gain controlled by voltage VGG The input matching circuit is composed of C826 L826 L814 C843 and R824...

Page 440: ...nd the voltage is applied to the power control circuit U801 Then U801 outputs the voltage VGG for controlling the gate voltage of Q805 and Q804 ensuring a constant power output The reverse power is co...

Page 441: ...129 15MHz TV Attenuator 1dB Attenuator Control 10dB Tx Rx Switch Low pass Filter Receiver Front end RF signals feed to the low pass filter to remove out of band signals and are applied to the two sta...

Page 442: ...second LO signal The clock frequency is 18 MHz which is generated by the external LC resonance loop D702 L715 and C745 DSP U302 gets the audio signal from IF IC Then this signal goes through U302 to...

Page 443: ...ting the reference frequency Meanwhile the frequency generated by VCO goes into PLL IC U100 for frequency division The resulting frequency will be compared with reference frequency in terms of phase d...

Page 444: ...nna LCD Power REB 1315LPx GPS data can be acquired via the programmable GPS key on the front panel of the mobile radio The GPS function is realized via REB 1315LPx module which integrates GPS baseband...

Page 445: ...al circuits of U902 Check power on circuit and peripheral circuits of U900 and U901 Yes No Yes No Yes Yes No No Yes Yes No No U903 1V8D is normal 7 U919 1V6D is normal 8 Check power on circuit and per...

Page 446: ...es Replace the active antenna No SiRF Demo software displays communication status on the computer Voltage at SMA of GPS antenna connector is normal 3 Yes Yes Change active antenna Check and replace co...

Page 447: ...s Check Q801 and relevant components No Power of Q805 is normal 5 Check Q805 and relevant components Yes No Power of Q804 is normal 6 Check Q804 and relevant components No Power of Q802 and Q803 are n...

Page 448: ...ont panel output is normal 1 Yes Replace the front panel No Input a IF signal 44 85 MHz and test whether the circuit is normal 2 Yes Second LO is normal 3 No Check Q701 and peripheral components No TP...

Page 449: ...z IF signal at the mixer and sensitivity is about 117 dBm 3 There is a second LO signal 47 1 MHz at TP704 4 Use the communication test set to apply an RF signal of 100 dBm and the sensitivity at TP610...

Page 450: ...Yes Check the feedback circuit Check CPU data circuit Yes No End Q106 Q110 Q100 and Q103 work normally 3 No Replace Q108 Q112 Q101 and Q105 Oscillates 19 2 MHz 7 Yes Check 19 2MHz oscillator circuit N...

Page 451: ...for detailed function definitions 2 PTT input Digital input 3 3V CMOS PTT input for the palm microphone which is valid at low level 3 External audio output Analog output Load impedance 1 k Vrms 600 m...

Page 452: ...phone is detected or press the key of the palm microphone this pin is used for HOOK function when desktop microphone is detected this pin is used for MONITOR function 10 Accessory identification inter...

Page 453: ...ar panel is mainly used for accessory connection of mobile radio or compatibility with other interfaces Users can further develop the radio via this interface The figure and definition of each pin is...

Page 454: ...is used for signal input of external MIC The audio path is valid when the external Mic PTT is held down 8 RX Audio Analog signal output Load impedance 1 k Vrms 300mV 10 1 kHz 60 system max deviation D...

Page 455: ...15 ACC_IO3 Digital input 5V TTL Accessory identification interface high level by default This pin and Pin 13 ACC_IO2 can compose three accessory identification statuses Please refer to the DB26 Access...

Page 456: ...ternal speaker output 2 26 Ign Sense Detect Pin Analog voltage input Ignition voltage input 7 V Input pin for ignition voltage Note When a pin is marked with 5 V TTL level this pin has the pull up fun...

Page 457: ...VCI 2 5 3 3 V adjustable port 3 VCI 2 5 3 3 V adjustable port 4 IOVCC 1 65 3 3 V adjustable I O port 5 FLM Synchronization signal control port 6 CS Chip select signal 7 RS Register select 8 WR Write s...

Page 458: ...K3 J4 Aviation Interface of Front Panel Pin No Name Description 1 ACC_IO1 Digital input 2 PTT_IN Digital input 3 External_Audio Analog output 4 USB_D USB data cable 5 GND Ground cable 6 USB_VBUS Power...

Page 459: ...put resistances to be larger than or equal to 47 k 3 GPIO2 5 GPIO3 7 GPIO4 O 9 GPIO5 RESET OUT O 11 UART TX UART O UART 13 UART RX I 15 UART CTS I 17 UART RTS O 2 I2C SDA I2C I O I2C 4 I2C SCL O 6 MCB...

Page 460: ...e Power supply 5 External Alarm Analog voltage output 6 Power Ground Power supply grounding 7 Tx Audio Analog input 8 RX Audio Analog output 9 Spkr Analog output 10 D USB USB data cable 11 USB_GROUDN...

Page 461: ...udio Input grounding 3 ACC_IO1 Accessory identification interface 1 4 USB_VBUS USB power supply 5 HOOK HOOK 6 PTT PTT 7 USB_D USB data cable D 8 USB_D USB data cable D 9 ACC_IO2 Accessory identificati...

Page 462: ...p select 25 CLOCK Backlight control IC clock 26 DATA Backlight control IC data 27 OE_LCD LCD read enable 28 WE_LCD LCD write enable 29 CS2_LCD LCD chip select 30 F_A1_LCD LCD register select enable 31...

Page 463: ...p 1 Connect the radio to HP8921 via the antenna connector and set HP8921 to TX test mode 2 Open the Tuner software and go to TUNE_DATA TX Reference Oscillator Warp in the left navigation tree Then cli...

Page 464: ...TX test mode 2 Set HP8921 as follows IF Filter 230 kHz Filter1 20 Hz HPF Filter2 15 kHz LPF De Emphasis off 3 Open the Tuner software and go to TUNE_DATA TX Transmit to Deviation in the left navigatio...

Page 465: ...uner Transmit Oscillator Voltage 1 Connect the radio to HP8921 via the antenna connector and set HP8921 to TX test mode 2 Open the Tuner software and go to TUNE_DATA TX Transmit Oscillator Voltage in...

Page 466: ...value to the radio Receive Oscillator Voltage 1 Connect the radio to HP8921 via the antenna connector and set HP8921 to RX test mode 2 Open the Tuner software and go to TUNE_DATA RX Receive Oscillato...

Page 467: ...flex 3920 as follows remain default values for other parameters Frq Be consistent with the frequency of the channel to be tested STD IB 511 153 Lv1 signal strength 116 dBm 110 dBm by default Step 2 Op...

Page 468: ...PCB 52 9 PCB View MD78X MD78XG PCB View Front Panel Top Layer...

Page 469: ...PCB 53 MD78X MD78XG PCB View Front Panel Bottom Layer...

Page 470: ...MD78X MD78XG PCB View Main Board Top Layer 54...

Page 471: ...PCB 55 MD78X MD78XG PCB View Main Board Bottom Layer...

Page 472: ...X100 U905 U500 U909 U231 X302 U302 U401 USB Control Head Accessory Level Translator Option board U919 U902 U900 U903 U901 U302 U233 U910 U500 U231 U327 U231 U232 U302 U326 Q920 Q921 U914 Auto baterry...

Page 473: ...6105 Z6100 Q6103 Q6102 Gain 6dB Q801 Firstsage Gain 16dB Gain 16dB Gain 13dB Q805 PreDriver Q804 Driver Q802 Q803 Finalstage High Temperature Protection Tx Rx Switch Tx_PORT Rx_PORT Switch s Power 9 1...

Page 474: ...H 8Mx16 psRAM 2MX16 Mobile SDRAM 128Mb 8Mx16 JTAG EMIFF JTAG CLK EMIFS 19 2MHz TCXO Mcbsp2_TX Mcbsp2_RX BELL MCLK UART3 Rear Accessory MAP USB GPIOs UART2 or Volume 74HC595 Acc_ID PRGM GPIOs Control H...

Page 475: ...C43 0 047uF NC C43 0 047uF NC R24 NC R24 NC TP22 TP TP22 TP D8 KAA 3528RG D8 KAA 3528RG 4 3 2 1 D4 D4 1 2 R46 270 R46 270 TP33 TP TP33 TP R32 270 R32 270 S8 PF1 S8 PF1 1 2 C53 470pF C53 470pF U7 E27...

Page 476: ...C261 0 01u C261 0 01u R293 3 3K R293 3 3K R258 10K R258 10K R271 100 R271 100 R263 30K R263 30K R241 56k R241 56k Q233 UMC4N Q233 UMC4N 1 2 3 4 5 R252 100K R252 100K R232 33 R232 33 C248 0 1u C248 0 1...

Page 477: ...R509 10k R509 10k C511 10uF 10v C511 10uF 10v R567 0 R567 0 C513 1000P C513 1000P C517 100P C517 100P C502 3300p C502 3300p C514 0 1u C514 0 1u U500 U500 DVDD 1 PD 2 LDAC 3 DIN 4 SCLK 5 CS 6 FS 7 DGND...

Page 478: ...DQ6 D8 DQ7 E9 DQ8 E1 DQ9 D2 DQ10 D1 DQ11 C2 DQ12 C1 DQ13 B2 DQ14 B1 DQ15 A2 A0 H7 A1 H8 A2 J8 A3 J7 A4 J3 A5 J2 A6 H3 A7 H2 A8 H1 A9 G3 A11 G2 A12 G1 A10 H9 CKE F3 RAS F8 UDQM F1 BA1 G8 BA0 G7 WE F9...

Page 479: ...01u C384 0 01u C388 0 1u C388 0 1u R387 33 R387 33 C391 0 1u C391 0 1u R380 33 R380 33 R396 4 7K R396 4 7K C392 0 1u C392 0 1u C335 100p C335 100p R394 10K R394 10K OSC32 OSC32 1 C382 0 1u C382 0 1u...

Page 480: ...PIO11 MCBSP2 CLKR V7 GPIO20 MCBSP2 CLKX Y6 GPIO12 MCBSP2 FSR W6 GPIO21 MCBSP2 FSX W7 GPIO19 MCBSP2 DR AA5 GPIO22 MCBSP2 DX P10 GPIO0 USB VBUS R18 LCD P0 D18 LCD P1 B21 LCD P2 C19 LCD P3 G14 LCD P4 H13...

Page 481: ...R2 R1 R2 R1 Q409 MUN5214DW1T1 1 2 5 3 4 6 R568 33K R568 33K D405 MMBZ20VALT1G D405 MMBZ20VALT1G C422 0 1U C422 0 1U C478 100p C478 100p C416 100p C416 100p R437 4 7K R437 4 7K R448 4 7K R448 4 7K C41...

Page 482: ...32 33 34 35 36 37 38 39 40 41 42 TP4009 TP4009 TP4021 TP4021 C463 100p C463 100p L411 BLM18PG300SN1D L411 BLM18PG300SN1D TP4005 TP4005 C460 NC C460 NC R523 33 R523 33 L407 BLM18PG300SN1D L407 BLM18PG...

Page 483: ...14 3 1 2 C945 470p C945 470p F900 F150 24 F900 F150 24 R975 20K R975 20K R970 1k R970 1k TP4032 TP4032 C950 0 1u C950 0 1u C903 470uF 25V C903 470uF 25V 1 2 D920 BAS16XV2T1G D920 BAS16XV2T1G 2 1 R924...

Page 484: ...68 R114 68 U102 FSA66P5X U102 FSA66P5X Vin 1 OUT 2 GND 3 Vcc 5 ON OFF 4 C67 0 1U C67 0 1U C71 1u 16V C71 1u 16V 1 2 C97 0 01U C97 0 01U C85 0 1u C85 0 1u C1004 33P C1004 33P C80 0 01U C80 0 01U R3 0 R...

Page 485: ...SV305 D111 1SV305 2 1 TP123 RX_LO TP123 RX_LO 1 C155 16p C155 16p C185 150p C185 150p C26 4 5p C26 4 5p R6050 1k R6050 1k Q103 2SC5010 Q103 2SC5010 2 3 1 C14 1500P C14 1500P R160 100 R160 100 D112 1SV...

Page 486: ...C6179 0 1u C6179 0 1u C6108 NC C6108 NC R6120 51 R6120 51 C6162 15p C6162 15p C6127 NC C6127 NC C6157 100p C6157 100p R6136 20K R6136 20K C6115 NC C6115 NC D6103 1SV279 D6103 1SV279 1 2 TP6110 RX CV...

Page 487: ...R704 2 2k R704 2 2k C769 100p C769 100p C767 100p C767 100p TP709 5VA_RX TP709 5VA_RX 1 C742 1u C742 1u L704 10u L704 10u C727 470p C727 470p C712 0 1u C712 0 1u C747 22P C747 22P C716 180p C716 180p...

Page 488: ...Couple Pin 1 Fcouple 3 4 4 Pout 2 5 5 Rcouple 6 L823 82p L823 82p R926 NC R926 NC C816 8p C816 8p L803 BLM41PG600SN1 L803 BLM41PG600SN1 1 2 C865 100nH C865 100nH R896 82K R896 82K C804 22u 25V C804 22...

Page 489: ...101054710010 470pF 94 R12 B2H 3001063300000 33 24 C34 B5B 3101054710010 470pF 95 R15 B3G 3001060000000 0 25 C35 B5C 3101054710010 470pF 96 R17 B2H 3001063300000 33 26 C36 B5B 3101054710010 470pF 97 R1...

Page 490: ...13 R365 T3C 3001051030000 10k 2 C331 T3A 3101071060010 10uF 14 R366 T3C 3001051030000 10k 3 C332 T3A 3101051040010 0 1uF 15 R368 T3C 3001051010040 100 4 C333 T3A 3101071060010 10uF 16 R370 T3C 300105...

Page 491: ...39pF 842 L6120 T7I 3210306470000 47nH 44 C154 B8G 3101053300000 33pF 843 L6121 T7I 3211506101000 Ferrite bead 45 C155 B8G 3101061600000 16pF 844 L6122 T7I 3101061040010 0 1uF 46 C156 B7E 310105152000...

Page 492: ...20pF 903 L835 T5F 3001060000000 0 105 C255 B6C 3101051050000 1uF 904 L836 T5E 3221513600000 Ferrite bead 106 C256 B6D 3101051010030 100pF 905 L837 B3J 3210306101000 100nH 107 C257 B5C 3101061050020 1u...

Page 493: ...159 C306 B6B 3101051030020 0 01uF 958 Q413 T6C 3403008000010 BRT 160 C307 B6B 3101051010030 100pF 959 Q414 T3C 3414999000000 BRT 161 C308 B7A 3101051040010 0 1uF 960 Q415 T2C 3599990000710 P MOSFET 16...

Page 494: ...61020040 1000pF 1015 R145 B8E 3001051010040 100 217 C380 B7B 3101051040010 0 1uF 1016 R146 T8E 3001051010040 100 218 C381 B7C 3101051030020 0 01uF 1017 R147 T7E 3001051010040 100 219 C382 B6C 31010510...

Page 495: ...48 B8B 3101051010030 100pF 1078 R264 B5D 3001051020000 1k 280 C449 B8A 3101051010030 100pF 1079 R265 B5B 3001051820000 1 8k 281 C450 B8A 3101051010030 100pF 1080 R266 B5B 3001054730000 47k 282 C451 B8...

Page 496: ...101053300000 33pF 1141 R367 T7D 3001053300010 33 343 C6066 B8E 3101054700010 47pF 1142 R368 T3C 3001051010040 100 344 C6067 B8F 3101054700010 47pF 1143 R369 T7D 3001053300010 33 345 C6068 B8G 31010533...

Page 497: ...B6J 3001050000000 0 1204 R433 T8C 3001053300010 33 406 C6223 B6J 3101051000030 10pF 1205 R434 T8D 3001051010040 100 407 C6224 B6J 3101055600000 56pF 1206 R435 T3C 3001054720000 4 7k 408 C6225 B6J 310...

Page 498: ...10k 468 C734 B6H 3101054700010 47pF 1267 R502 B7C 3001051020000 1k 469 C735 T6H 3101051040010 0 1uF 1268 R503 B7C 3001051020000 1k 470 C736 T6H 3101051030020 0 01uF 1269 R504 B7C 3001051020000 1k 471...

Page 499: ...00 0 018uF 1330 R567 B7C 3001050000000 0 532 C84 T7F 3110071040000 0 1uF 1331 R568 B3A 3001060000000 0 533 C841 T3F 3101995600000 56pF 1332 R569 T2C 3001051030000 10k 534 C843 T5E 3212106829000 8 2nH...

Page 500: ...52220010 2 2k 594 C909 B2G 3101062210000 220pF 1393 R705 T6H 3001051030000 10k 595 C91 T7F 3110071040000 0 1uF 1394 R707 B6H 3001052210000 220 596 C910 B5I 3101051020010 1000pF 1395 R708 B6H 300105472...

Page 501: ...1456 R870 B5H 3001051530010 15k 658 C975 B2G 3101063310010 330pF 1457 R872 B4H 3001051840000 180k 659 C976 B2G 3101062210000 220pF 1458 R874 B5I 3001051020000 1k 660 C977 B2G 3101061810060 180pF 1459...

Page 502: ...ction diode 1509 R941 B3B 3001051010040 100 711 D403 T2A 3310240000000 ESD protection diode 1510 R942 B3B 3001054720000 4 7k 712 D404 T2B 3310240000000 ESD protection diode 1511 R943 B3A 3001064730000...

Page 503: ...Switching IC 757 L105 B7E 3211256000000 56nH 1556 U102 T7E 3616059000000 Switching IC 758 L106 B7E 3214307181000 180nH 1557 U201 B5B 3602017000030 Audio amplifier IC 759 L107 B8E 3217607681000 680nH 1...

Page 504: ...10 220pF 816 L409 B8B 3221506300000 Ferrite bead 5 C1001 B7F 3101051520000 1500pF 817 L410 B8B 3221506300000 Ferrite bead 6 C1002 T8F 3101051020010 1000pF 818 L411 B8B 3221506300000 Ferrite bead 7 C10...

Page 505: ...F 3101061000000 10pF 873 L713 T6G 3213306561000 0 56uH 62 C18 B7G 3101051100010 11pF 874 L714 T5H 3221506601000 Ferrite bead 63 C181 B7E 3101050100030 1pF 875 L715 B5H 3213212332000 3 3uH 64 C184 B7E...

Page 506: ...01051040010 0 1uF 930 L931 T6D 3213099472000 4 7uH 119 C268 B6A 3101064740010 0 47uF 931 L940 T2D 3221513600000 Ferrite bead 120 C269 B5C 3101052210010 220pF 932 P1 6202010000010 APC shielding mask 12...

Page 507: ...PA module 172 C331 T3A 3101071060010 10uF 984 Q804 T6F 3504990000070 N MOSFET 173 C332 T3A 3101051040010 0 1uF 985 Q805 T6E 3504990000010 PA MOSFET 174 C333 T3A 3101071060010 10uF 986 Q810 B5E 340300...

Page 508: ...4 C399 B6B 3101051030020 0 01uF 1046 R176 B7F 3001054720000 4 7k 235 C4 B7G 3101052000020 20pF 1047 R177 T7G 3001051030000 10k 236 C400 B7B 3101051040010 0 1uF 1048 R178 T8G 3001053300010 33 237 C401...

Page 509: ...00000 0 297 C474 T3C 3101053920000 3900pF 1109 R283 B6D 3001053030000 30k 298 C476 T3C 3101053920000 3900pF 1110 R284 B6D 3001051530010 15k 299 C477 T8C 3101051010030 100pF 1111 R285 B6D 3001051530010...

Page 510: ...3101054710010 470pF 1172 R386 B6C 3001051000000 10 361 C6149 B7H 3101061050020 1uF 1173 R387 T7B 3001053300010 33 362 C6151 B8H 3101054710010 470pF 1174 R388 T7C 3001051000000 10 363 C6152 B8I 3101050...

Page 511: ...423 C6243 B5J 3101051040010 0 1uF 1235 R453 T6B 3001051030000 10k 424 C6244 B7J 3101053900000 39pF 1236 R454 T3A 3001051030000 10k 425 C6245 B7J 3101052000040 20pF 1237 R455 T3A 3001058230000 82k 426...

Page 512: ...C750 B6H 3101071050240 1uF 1298 R521 T7B 3001053300010 33 487 C751 T6G 3101051000030 10pF 1299 R522 T7A 3001053300010 33 488 C752 T5I 3101074750000 4 7uF 1300 R523 B8B 3001053300010 33 489 C754 T5I 31...

Page 513: ...18pF 1361 R6053 B8E 3001051030000 10k 550 C858 T2I 3101060400010 4pF 1362 R6100 T4I 3001055110000 510 551 C86 T8F 3101051040010 0 1uF 1363 R6106 T4J 3001066810000 680 552 C860 T5F 3210106360000 36nH 1...

Page 514: ...924 B4D 3101061050020 1uF 1424 R727 T5H 3001064730000 47k 613 C925 B5D 3101061050020 1uF 1425 R728 T5H 3001064730000 47k 614 C926 B7D 3101071060010 10uF 1426 R802 B6E 3001061230000 12k 615 C927 T4D 31...

Page 515: ...00000 47pF 1487 R878 B2G 3001081000000 10 676 C987 T5G 3210306180000 1488 R880 B5E 3001074720010 4 7k 677 C988 T5F 3210306180000 1489 R881 B5E 3001074720010 4 7k 678 C99 T8F 3101052710000 270pF 1490 R...

Page 516: ...B8E 3303030800020 Switching diode 1539 R945 B3B 3001051030000 10k 728 D6010 B8F 3303030800020 Switching diode 1540 R946 B3A 3001071020010 2k 729 D6014 B8G 3303030800020 Switching diode 1541 R947 B3B 3...

Page 517: ...000 680nH 1586 U233 T7A 3612016000000 Memory 775 L121 B8F 3217107102000 1uH 1587 U235 B5C 3605010000020 Operational amplifier 776 L124 B7G 3237110220000 Air core coil 22nH 1588 U236 B5C 3605010000020...

Page 518: ...15000210 Power management IC 804 L235 B5D 3211506101000 Ferrite bead 1616 U919 T6D 3608010006230 Power management IC 805 L321 T3A 3212106390000 39nH 1617 W321 T3A 4411100002000 IPX RF connector 806 L3...

Page 519: ...unications Corporation Limited 2016 Address Hytera Tower Hi Tech Industrial Park North 9108 Beihuan Road Nanshan District Shenzhen People s Republic of China Postcode 518057 http www hytera com Hytera...

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