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TK-290

7. Control Circuit

The control unit consists of microprocessor IC406, flash

memory IC414, and its peripheral circuits. It controls the TX-
RX unit and transfers data to and from the control unit. The
CPU (IC406) mainly performs the following :
1) Switching between transmission and reception by PTT

signal input.

2) Reading channel, frequency, and program data from the

memory circuit.

3) Sending frequency program data to the PLL.
4) Controlling squelch on/off by the pulse signal input from

the squelch circuit.

5) Controlling the audio mute circuit by decode data input.
6) Transmitting encode data (QT, DQT).
7) Sending serial data to output expander (IC400, IC403,

IC404 and IC405) to control various function in the unit.

7-1. Memory circuit

IC414 is a flash memory with a capacity of 2M bits that

contains the transceiver control program for the CPU and
data such as transceiver channels and operating features.

This program can be easily written from an external de-

vices. Data, such as DTMF memories and operating status,
are programmed into the EEPROM (IC412).

IC406

CPU

IC412

IC414

EEPROM

IC415

ADDRESS

DECODE

FLASH

ROM

Fig. 12

Memory circuit

7-2. CPU clock shift

When the CPU (IC406) 12MHz clock (X400) high fre-

quency is multiplexed with the reception frequency, it be-
comes an internal beat signal, suppressing the signal sensi-
tivity. To prevent this, by turning Q407 on, the clock fre-
quency is shifted (about 4kHz).

(Shift on/off can be set through programming.)

8

IC406

CPU

X1

X2

Vcc

11

10

12

C448

Q407

SW

R428

R487

C444

C447

DGND

C449

R459

X400

12MHz

Fig. 13

CPU clock frequency shift

Fig. 14

Key input

7-3. Shift register

IC400, 403, 404 and 405 is an interface IC for output port

expansion. It is used to expand the CPU (IC406) output
ports.

7-4. D/A converter

IC3 and IC603 is used as a conventional semi-fixed-resis-

tor converter. It sets the following :
1) RX sensitivity
2) Transmission power
3) Modulation level
4) Audio power
5) Frequency

7-5. Key input

KI1 or KI2 becomes HIGH when any key is pressed (or

Enable signal on the optional circuit).

When KI1 or KI2 becomes HIGH, KI0 also becomes HIGH

to trigger the interrupt to IC406 in order to start the key
scan.

When the key scan starts, the output terminals (Q1~Q5)

become LOW. Only the key sensing circuit remains HIGH.
When a key is pressed, the signal is routed through KI1 or
KI2 to the microprocessor. Then, the microprocessor deter-
mines which key is pressed using this signals.

CIRCUIT DESCRIPTION

IC2

Q1 Q2 Q3 Q4 Q5

IC406

CPU

Monitor

SW A

SW B

IC4

TC7SH08

FU

Tone1

Tone2

OPPTT

TCONT

CLK,DAT,STB

OPPTT

TCONT

MAND

KEY1

KEY2

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Содержание TK-290

Страница 1: ...ing or otherwise for any purpose without the prior written permission of Kenwood Disclaimer While every precaution has been taken in the preparation of this manual Kenwood assumes no responsibility for errors or omissions Neither is any liability assumed for damages resulting from the use of the information contained herein Kenwood reserves the right to make changes to any products herein at any t...

Страница 2: ...S FINAL UNIT X45 3592 71 50 CONTROL UNIT X53 3930 XX 51 TX RX UNIT X57 5390 10 55 SCHEMATIC DIAGRAM 61 BLOCK DIAGRAM 67 LEVEL DIAGRAM 69 TERMINAL FUNCTION 70 KNB 17A Ni Cd BATTERY 71 KMC 25 26 SPEAKER MICROPHONE 72 KSC 19 CHARGER 73 KSC 20 RAPID CHARGER 73 KPG 36 PROGRAMMING INTERFACE CABLE 73 KRA 14 HELICAL ANTENNA 73 SPECIFICATIONS BACK COVER CAUTION When using an external power connector please...

Страница 3: ...ng caps or in an explosive atmosphere This equipment should be serviced by a qualified techni cian only SERVICE This radio is designed for easy servicing Refer to the schematic diagrams printed circuit board views and align ment procedures contained within NOTE WE CANNOT guarantee oscillator stability when using channel element manufactured by other than KENWOOD or its authorized agents FCC COMPLI...

Страница 4: ... the external speaker microphone optional here Otherwise keep the supplied cover in place 1 2 Display Alphanumeric display Displays the operating group or channel number or the group or channel name When making a DTMF or 2 Tone call the display will alternate between CALL and the channel Also displays various menu functions 7 Segment display Displays the operating group or channel number Also disp...

Страница 5: ...is set Either priority channel 1 or 2 is scanned If a non priority channel stops temporarily a priority chan nel signal is detected at certain intervals If a priority channel stops temporarily it stops until there is no signal on the priority channel 3 When two priority channels are set The non priority channel priority channels 1 and 2 are scanned If a non priority channel stops temporarily prior...

Страница 6: ...nel Lockout situa tion For example To make an emergency voice call To transmit under busy channel lockout situation press PTT once more within approx 500ms after the PTT release 3 6 Selective Call Alert LED You can select whether or not the LED on the transceiver flashes in an orange color when Selective call was occurred 3 7 Battery Warning This transceiver has battery warning feature If the low ...

Страница 7: ...lert tone before the automatic transmis sion is performed Duration of Locator Tone 2 Duration of an alert tone after the automatic transmission is performed Man Down Delay Time Delay time of entering the emergency mode when the internal Man Down port becomes active Man Down Pre alert Wait time of the alert tone when the internal Man Down port becomes active to enter the emergency mode After an ala...

Страница 8: ...OPERATING FEATURES 5 Channel Features You can use these features using the programming soft ware KPG 38D 5 1 Option Signalling The transceiver is programmable to the option signalling 2 Tone decode program 1 2 Tone decode program 2 2 Tone decode program 3 DTMF decode to each channel It is useful to receive an individual call Receive format is selectable AND or OR with QT DQT for each group The rad...

Страница 9: ...creases by one step If this key holds down for 500ms approxi mate channel number increases continuously This key works as the squelch level adjuster in squelch level adjust mode This key works as the OST operator se lectable tone number selector in the OST mode This key works as the SCR voice scrambler code selector in the voice scrambler code select mode 6 5 Channel Name This key switches the LCD...

Страница 10: ...all channel changes to Low Press this key again the transmission power returns to programmed value 6 14 Monitor Monitor the channel before a transmission Press this key once MON appears and unmutes speaker if a carrier is present regardless of the specified signalling including option signalling Press this key again MON disappears and mutes speaker Press this key after the Option Signalling is mat...

Страница 11: ...ne is attenuated Press this key again the volume level of speaker microphone returns to the previous level 7 2 Tone Built in 2 Tone decoder decoder program 1 decoder pro gram 2 decoder program 3 is available for option signalling It is possible to use individual call or group call 8 DTMF Built in DTMF encoder is available for dialing Manual dial Auto dial 9 memory Re dial 1 memory Keypad model onl...

Страница 12: ...use this mode PC mode Communication between the radio and PC IBM compatible It requires the KPG 38D PC programming mode Frequency signalling and features write to the radio and read from the radio PC test mode Check the radio using the PC This feature is included in the FPU Self programming mode Frequency signalling and features write to the radio Panel test mode Dealer use to check the fundamen R...

Страница 13: ...he Top 1 Top 2 keys and press PTT The setting items and setting data will then appear so reset the data with the Top 1 Top 2 keys and press PTT When finished the display shifts to the next setting item After finished setting all items press PTT to return to Group selection Changes in the frequency CH steps and the QT DQT steps can be made in Side 1 No Function name Display Remarks Select 1 1 durin...

Страница 14: ...ress PTT to return to next Group selection No Function name Display Remarks Select Group GRP 1 1 160 1 Battery save BATT L OFF Short Mid Long 2 Time out timer TOT 60 OFF 30s 300s 30s step 3 TOT pre alert TOT P 10 OFF 1s 10s 1s step 4 TOT rekey time TOT K 2 OFF 1s 60s 1s setp 5 TOT reset time TOT S 2 OFF 1s 15s 1s step 6 Group Delete Add D A ADD Delete Add 7 Signalling SIG AND AND OR Operation 1 Se...

Страница 15: ...alk back 7 Priority 2 8 Priority 2 Talk back 17 Squelch level SQ LV 15 0 15 Operation 1 Select the setting value with the Top 1 Top 2 keys 2 Press the PTT and the selected value is backed up and operation shifts to the next item for setting 3 Press Side 2 on the Group selection screen in order to return to the Self programming mode initial display Note 1 Different sample displays are shown 2 Setti...

Страница 16: ...th the Top 1 key or Top 2 key and press PTT 3 Set the power switch on the slave side transceiver to ON 4 The red LED on the master side transceiver flashes when cloning starts and an END message appears when cloning ends 5 The green LED on the slave side transceiver flashes 6 When a problem occurs during cloning an ERROR message appears on the master side transceiver 7 Pressing the Side 2 key sets...

Страница 17: ...w opens on the display to indicate progress of writing When the TK 290 starts to receive data PG is appeared on 2 digit sub display 8 If writing ends successfully the red LED on the TK 290 lights and the checksum is displayed 9 If you want to continue programming other TK 290s re peat steps 5 to 8 Notes To start the Firmware Programmer from KPG 38D the Fpro path must be set up by KPG 38D setup Thi...

Страница 18: ...er uses the GaAs IC IC200 The 1st mixer mixes the signal with the 1st local oscillator frequency from the VCO and converts it to the 1st IF 44 85MHz The signal then passes through monolithic crystal filter XF301 to remove unnecessary nearby frequency compo nents The signal from the MCF is used as the 1st IF signal 3 3 IF amplifier The 1st IF signal is amplified Q302 and fed into IC300 in the FM IF...

Страница 19: ...d this logic level is high When the INT AFC is high the EXT AFC goes low so the AF signal is only input to the amplifier for the internal speaker INT SP of IC1 However when a SP MIC has been in stalled this logic level is low so the INT AFC goes low and the EXT AFC goes high So that the AF signal is input only to amplifier for the external speaker EXT SP of IC1 IC300 MIX DET IF SW IC301 IC601 2 2 ...

Страница 20: ...d there is no signal at Sub the Main signal is output as is from IC3 pin 7 In other words only the voice audio of the operator in ex tremely close proximity to the Main MIC is input to Main so that the signal is output as is from IC3 pin 7 Also when the N C switch is set to L transistor Q14 turns off so Sub microphone turns off and operation is the same as above 12 HPF LPF HPF IDC PRE EMP ALC COMP...

Страница 21: ...to T R switch D602 603 The PLL IC consists of a prescaler fractional divider ref erence divider phase comparator charge pump This PLL IC is fractional N type synthesizer and performs is the 40 or 50kHz reference signal which is eighth of the channel step 5 6 25 or 7 5kHz The input signal from the pins 1 and 5 of the PLL IC is divided down to the 40 or 50kHz and compared at phase comparator The pul...

Страница 22: ...MHz clock X400 high fre quency is multiplexed with the reception frequency it be comes an internal beat signal suppressing the signal sensi tivity To prevent this by turning Q407 on the clock fre quency is shifted about 4kHz Shift on off can be set through programming 8 IC406 CPU X1 X2 Vcc 11 10 12 C448 Q407 SW R428 R487 C444 C447 DGND C449 R459 X400 12MHz Fig 13 CPU clock frequency shift Fig 14 K...

Страница 23: ...ne is passed the D A con vertor IC603 for audio control summing amplifier IC604 2 2 audio power amplifier and then to the speaker MSK The MSK signal 1200 bps is output from pin 6 of IC607 The signal passes through the D A converter IC603 for the MSK deviation adjustment and is routed to the VCO When encoding MSK the microphone input signal is muted 8 2 Decode Low speed data QT DQT The demodulated ...

Страница 24: ...Pin 41 Expander output pin The TK 290 compander can be turned on or off only when modulation is set to Narrow by FPU setting The compander cannot be turned on when modulation is set to Wide OFF 10 Option Board Terminal Terminals for mounting the option board are provided at the bottom of the TX RX unit The table below shows the correspondence between the board and terminals Discon nect R414 and R6...

Страница 25: ...cy operatiion request BUSY Channel Busy Microcomputer Busy logic ANI board Microcomputer output L Busy H Not busy KEY Transmission Transmission start control GE Star Control unit Microcomputer input L Transmission request Key X53 counter TX RX unit X57 microcomputer H No transmission request A Board power Switched B Power supply supply 10 2 Option port 2 For voice scrambler etc Abbreviation PCB Na...

Страница 26: ...72 ASCK2 SCK2 O Non connect 40 P20 RXD1 SI1 I FPU 41 P21 TXD1 SO1 O FPU 42 P22 ASCK1 SCK1 O Modem STB 43 P23 PCL O DTMF clock 44 P24 BUZ I DTMF decoder SD 45 P25 SI0 O LCD CS 46 P26 SO0 O Shift register 1 STB 47 P27 SCK0 O Shift register 2 STB 48 P80 A0 Flash ROM access port 49 P81 A1 Pin No Port name I O Function 50 P82 A2 Flash ROM access port 51 P83 A3 52 P84 A4 53 P85 A5 54 P86 A6 55 P87 A7 56...

Страница 27: ...T H when Q3 port is H IC5 Option board OPPTT AND circuit control switch OPPTT H OUT H when Q4 port is H IC6 Option board TCONT AND circuit control switch MAND H OUT H when Q4 port is H IC7 Shift register IC10 Inverter IC101 LCD driver Q5 Power supply switch control AF AMP SW H on Q6 AF amplifier power supply switch Q7 Int audio mute switch INT AFC H INT SP audio signal on Q8 Audio mute switch MUTE...

Страница 28: ...h APC off Speed up Q13 DC switch D A port protection Q200 RF amplifier RX front Q301 Noise amplifier RX on Ref No Use Function Operation Condition Q302 IF amplifier Post amplifier Q303 DC switch 2nd IF W N switch sets to on when Narrow Q304 DC switch 2nd IF W N switch sets to on when Wide Q305 DC switch Q400 DC switch 5TC H on Q401 DC switch 5CC H on 5TC H on Q402 DC switch Regulator 5T 5C Q403 DC...

Страница 29: ... EX R D 7 3 E B 2 B 0 0 0 J 1 2 3 4 5 6 7 Chip B F Carbon resistor Normal type EX R D 1 4 B B 2 C 0 0 0 J 1 2 3 4 5 6 7 1 Type ceramic electrolytic etc 5 Voltage rating 2 Shape round square ect 6 Value 3 Dimension 7 Tolerance 4 Temp coefficient Capacitor value 010 1pF 100 10pF 101 100pF 102 1000pF 0 001µF 103 0 01µF Less than 10pF Code B C D F G pF 0 1 0 25 0 5 1 2 1st word 2nd word Refer to the t...

Страница 30: ...0998 02 ITEM CARTON CASE 51 2A J19 5330 14 HOLDER BATT RELEASE 52 1A J21 8326 14 HARDWARE FIXTURE SIDE KEY 53 1B J21 8328 14 HARDWARE FIXTURE LCD 54 2A J21 8329 14 HARDWARE FIXTURE CONT UNIT 56 2B J21 8343 14 HARDWARE FIXTURE 57 1C J29 0652 35 BELT HOOK ACCESSORY 58 1A J82 0047 05 FPC SIDE KEY 59 2B J82 0049 15 FPC VOL ENC 60 3A J82 0052 15 FPC UNIVERSAL CONNECTOR 61 2B J99 0346 24 ADHESIVE TAPE T...

Страница 31: ... 0K J 1 16W R60 RK73GB1J101J CHIP R 100 J 1 16W R63 64 R92 1252 05 CHIP R 0 OHM R66 67 R92 1252 05 CHIP R 0 OHM R101 RK73GB1J104J CHIP R 100K J 1 16W R102 104 RK73GB1J103J CHIP R 10K J 1 16W R105 RK73GB1J471J CHIP R 470 J 1 16W R106 RK73GB1J274J CHIP R 270K J 1 16W R107 RK73GB1J472J CHIP R 4 7K J 1 16W R108 RK73GB1J100J CHIP R 10 J 1 16W R502 RK73GB1J102J CHIP R 1 0K J 1 16W D2 DTZ3 9 B ZENER DIOD...

Страница 32: ...20PF J Ref No Address Parts No Description Ref No Address Parts No Description New Desti parts nation New Desti parts nation C303 CK73GB1C104K CHIP C 0 10UF K C304 CK73GB1H102K CHIP C 1000PF K C305 CK73GB1H103K CHIP C 0 010UF K C306 308 CK73GB1H102K CHIP C 1000PF K C309 C92 0602 05 CHIP TAN 1 0UF 10WV C310 311 CK73GB1C104K CHIP C 0 10UF K C312 CK73GB1C333K CHIP C 0 033UF K C313 314 CC73GCH1H220J C...

Страница 33: ... C 0 015UF K C668 CK73GB1H102K CHIP C 1000PF K C669 CC73GCH1H101J CHIP C 100PF J C681 CK73GB1E103K CHIP C 0 010UF K CN400 E40 5563 05 FLAT CABLE CONNECTOR CN401 E40 5947 05 FLAT CABLE CONNECTOR CN403 E40 5856 05 FLAT CABLE CONNECTOR CN404 405 E23 0342 05 TEST TERMINAL F400 F53 0143 05 FUSE CD300 L79 1072 05 TUNING COIL CF300 301 L72 0916 05 CERAMIC FILTER CF302 303 L72 0939 05 CERAMIC FILTER L1 L9...

Страница 34: ...3GB1J121J CHIP R 120 J 1 16W R205 RK73GB1J104J CHIP R 100K J 1 16W R206 RK73GB1J473J CHIP R 47K J 1 16W R207 RK73GB1J100J CHIP R 10 J 1 16W R208 RK73GB1J122J CHIP R 1 2K J 1 16W R209 RK73GB1J330J CHIP R 33 J 1 16W R210 211 RK73GB1J104J CHIP R 100K J 1 16W R212 RK73GB1J222J CHIP R 2 2K J 1 16W R213 RK73GB1J271J CHIP R 270 J 1 16W R214 RK73GB1J101J CHIP R 100 J 1 16W R215 216 R92 1252 05 CHIP R 0 OH...

Страница 35: ...9 RK73GB1J154J CHIP R 150K J 1 16W R610 RK73GB1J563J CHIP R 56K J 1 16W R611 RK73GB1J184J CHIP R 180K J 1 16W R612 RK73GB1J334J CHIP R 330K J 1 16W R614 RK73GB1J184J CHIP R 180K J 1 16W R615 616 RK73GB1J103J CHIP R 10K J 1 16W R617 R92 1252 05 CHIP R 0 OHM R618 RK73GB1J683J CHIP R 68K J 1 16W R619 RK73GB1J101J CHIP R 100 J 1 16W R621 RK73GB1J103J CHIP R 10K J 1 16W R622 RK73GB1J223J CHIP R 22K J 1...

Страница 36: ...S IC IC604 606 TC75W51FU MOS IC IC607 TC35453F MOS IC Q1 DTA114EE DIGITAL TRANSISTOR Q2 2SJ144 GR FET Q3 2SC4619 P Q TRANSISTOR Q4 2SC4617 S TRANSISTOR Q5 2SC4619 P Q TRANSISTOR Q6 2SC5110 O TRANSISTOR Q7 DTC114EE DIGITAL TRANSISTOR Q8 2SC4988 TRANSISTOR Q9 DTA144EE DIGITAL TRANSISTOR Q10 DTC144EE DIGITAL TRANSISTOR Q13 2SK1824 FET Q200 3SK274 J FET Q301 2SC4617 S TRANSISTOR Q302 2SK1215 E FET Q30...

Страница 37: ... 63 39 39 54 Gx2 Gx2 Gx2 G G G A Ax2 B E G A N14 0578 04 B N14 0594 04 C M2 6 x 8 BLK N30 2608 45 D M2 6 x 6 N67 2606 46 E M2 x 3 N78 2030 46 F M2 x 3 5 N79 2035 46 G M2 x 4 N83 2004 46 A G Gx2 F D G X45 G D F Cx2 701 Hx2 Hx2 X53 A 6 X53 E 6 X53 D 6 X53 F 6 X53 B 6 22 37 27 26 41 59 73 75 60 IC801 19 19 40 40 45 14 44 2 X57 5 35 68 67 25 56 61 76 20 10 53 34 24 ...

Страница 38: ...688 04 48 Protection bag H25 0029 04 16 Stopper D32 0421 24 71 Screw set N99 2004 05 57 Belt hook J29 0652 35 47 Packing fixture H12 3018 02 49 Item carton case H52 0998 02 13 Instruction manual B62 0816 30 702 Warranty card UPC code label Parts with the exploded numbers larger than 700 are not supplied ...

Страница 39: ...on the antenna daughter board must be disconnected Remove the Universal Connector 1 The universal connector is fastened to the chassis with double side tape 2 First unsolder the connection on the antenna daughter board 3 Press firmly with a tool such as a screwdriver and so that it can peel Note You must replace both parts together when re placing the universal connector or the FPC Remove the Side...

Страница 40: ...niversal connector ADJUSTMENT Universal connector 1 SSW 3 SP 5 EMC 7 PTT 9 NC 11 5M 13 RXD 2 SP EXT INT RF SW 4 MSW 6 ME 8 PF 10 E 12 TXD 14 NC Test Equipment Required for Alignment No Test Equipment Major Specifications 1 Standard Signal Generator Frequency Range Maximum 600MHz or more SSG Modulation Frequency modulation and external modulation Output 133dBm 0 05µV to 7dBm 501mV 2 Power Meter Inp...

Страница 41: ...ter Audio generator 10µ 10V Connector case KPG 36 PCB layo Remove the screw PCB layout Shield AF voltmeter Audio generator 100 µ 10 V 100 µ 10 V 10 µ 10 V 16 Ω Repair Jig Chassis Use jig part No A10 1399 03 for repairing the TK 390 Place the TX RX unit on the jig and fit it with 7 screws Note Supply power from an external power supply Battery terminal jig chassis How to Remove the Flat Cable 1 Gen...

Страница 42: ...de to set Panel tuning mode Note Different sample displays are shown Panel test mode LCD all lamp mode Side 2 holding about 2 sec Side 2 Orange Side 1 Battery level Squelch tight Side 2 Orange Side 2 Varicap shift voltage Mid Varicap shift voltage High Voltage change frequency Low Mid Voltage change frequency Low Mid Voltage change frequency Mid High Voltage change frequency Mid High Frequency tun...

Страница 43: ...e Power meter Panel ANT Panel Top1 155 000MHz 50Hz adjustment CH No 1 f counter Top2 Signalling No 1 Select FRQ in panel tuning mode When the TCXO X1 is replaced perform the frequency tune PTT ON in PC tuning mode from the FPU menu 2 Maximum 1 Set panel test mode Power meter Panel ANT Check 5 0W or more power CH No 3 check Signalling No 1 Ammeter BATT terminal voltage 7 5V Select POW 255 in panel ...

Страница 44: ... 2A or less adjustment Signalling No 1 Select POW LO PTT ON 6 TX low 1 Set panel test mode Check 0 5W 1 5W power CH No 1 1 2A or less check Signalling No 1 Set low power Push Side2 PTT ON 2 CH No 2 Signalling No 1 Set low power Push Side2 PTT ON 3 CH No 3 Signalling No 1 Set low power Push Side2 PTT ON 7 DQT balance 1 Set panel test mode Power meter Panel ANT Panel Top1 Make the demodu adjustment ...

Страница 45: ...TT ON 2 Push Side2 to select MDV M PTT ON 3 Push Side2 to select MDV H PTT ON 9 Maximum 1 Set panel test mode 1 90kHz 50Hz deviation CH No 3 According to the adjustment Signalling No 1 larger narrow Select MDV in panel tuning mode Turn the toggle SW to the right narrow Push Orange to 3 point adjustment mode Select MDV N L AG 1kHz 150mV Deviation meter filter setting LPF 15kHz HPF OFF PTT ON 2 Push...

Страница 46: ...C input OFF Select QTDV in panel tuning mode Turn the toggle SW to the right narrow Deviation meter filter setting LPF 3kHz HPF 50Hz De emphasis 750µs PTT ON 13 DQT 1 Set panel test mode 0 75kHz 0 05kHz deviation CH No 3 adjustment Signalling No 1 wide Select DQDV in panel tuning mode Deviation meter filter setting LPF 3kHz HPF OFF PTT ON 14 DQT 1 Set panel tuning mode 0 375kHz 0 05kHz deviation C...

Страница 47: ... OFF PTT ON 18 MSK 1 Set panel tuning mode 1 50kHz 50Hz deviation CH No 3 adjustment Signalling No 1 narrow Select MSDV in panel tuning mode Turn the toggle SW to the right narrow Deviation meter filter setting LPF 15kHz HPF OFF PTT ON 19 Transmission 1 Set panel test mode Check 42dB or more S N check CH No 3 wide Signalling No 1 Deviation meter filter setting LPF 300Hz HPF 3kHz De emphasis 750µs ...

Страница 48: ...form is peaked CH No 1 generator L202 The frequency with the peak waveform does not Use this Connect the spectrum L205 have to be the center frequency adjustment analyzer to TP3 Spectrum TX RX TP3 L206 After finished peaking the waveform perform a procedure Signalling No 1 analyzer 3 point adjustment and set for maximum sensitivity after replace Push Orange to 3 point ing any of adjustment mode th...

Страница 49: ...ignalling No 1 SSG output 116dBm 0 35µV MOD 1kHz DEV 1 5kHz Turn the toggle SW to the right narrow 2 Set panel test mode CH No 3 Signalling No 1 Turn the toggle SW to the right narrow 3 Set panel test mode CH No 5 Signalling No 1 Turn the toggle SW to the right narrow 6 Tight 1 Set panel test mode Panel Top1 Adjust to point of squelch CH No 3 Top2 opening squelch adjustment Signalling No 1 wide Se...

Страница 50: ... SSG output 3dB below to analyzer 12dB SINAD level 10 Squelch 1 Set panel test mode Check Squelch must be opened check CH No 3 wide Signalling No 1 SSG output 118dBm 0 28µV 2 SSG output 127dBm 0 1µV Squelch must be closed 11 Squelch 1 Set panel test mode Check Squelch must be opened check CH No 3 narrow Signalling No 1 Turn the toggle SW to the right narrow SSG output 118dBm 0 28µV 2 SSG output 12...

Страница 51: ...A C E B D 1 3 5 7 2 4 6 TK 290 PC BOARD VIEW 50 FINAL UNIT X45 3592 71 Component side view L801 OUT VCC Vcont IN C802 J72 0654 12 C803 C805 C806 C804 IC801 ...

Страница 52: ... 3 6 9 2 5 8 0 1 4 7 TOGGLE SW TGL F 6 B 6 D 6 TOP2 TOP1 D102 R105 CN501 D103 D7 D9 D6 D8 D104 INT MIC MAIN TK 290 PC BOARD VIEWS 51 52 CONTROL UNIT X53 3930 XX 11 K 12 K2 Component side view Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Ref No Address D6 10L D7 8L D8 10P D9 8P Ref No Address D102 3G D103 3K D104 4L Connect 1 and 4 ...

Страница 53: ...ICE MIC AF AFE AFE SP SP MUTE SD TO MAN D LAMP Q7 Q6 R64 C15 C38 C4 CP1 R31 R20 R19 R8 R7 R6 IC6 1 3 4 5 Q14 1 2 3 5 IC5 IC4 1 3 4 5 1 3 4 5 C22 D16 C27 C29 C28 R26 R28 R27 R62 CN1 1 R4 C12 R18 IC1 R13 R12 C13 C43 R14 R2 R1 R17 C14 R5 L9 Q15 Q7 D G S D G S D G S L3 L4 1 8 9 16 C41 C19 C32 C2 C31 R3 R43 R36 R44 R33 R32 C45 CN4 2 1 C46 D15 R45 R46 R47 CN3 1 6 R59 R48 R49 C33 C34 Q6 KI1 PTT PTTE Q7 Q...

Страница 54: ... R621 R626 R644 R646 R619 R615 C619 C660 C610 Q6 Q7 LAMP MAN D SD TO MUTE SP SP AFE AFE AF MIC MICE 5M SB SB E DAT CLK NC N CSW PTT LCS KEY2 KEY1 DGND KES NC INAFC EXAFX AMPSW OPPTT TCONT 1 33 E C602 C608 R616 X600 R672 R671 R670 R624 R628 IC603 1 12 13 24 R638 R637 IC606 R636 R648 R666 C633 R645 C632 IC607 1 11 12 22 23 33 34 44 R404 R408 R414 C656 C49 C56 C59 C63 C66 C62 R38 R40 R50 R53 L23 R36 ...

Страница 55: ...6 X300 CF300 CF302 CF301 CF303 R28 R333 R332 R329 C323 C43 IC301 1 3 4 5 C19 R74 R77 C95 C93 C94 C10 C96 C17 L21 R73 IC5 1 10 11 20 C33 C29 Q3 Q1 D5 R24 R20 R21 C36 C35 X1 R4 R403 C485 R466 R460 R437 R431 R430 R6 R441 R418 Q414 Q415 D G S D G S G S D L905 R426 R428 R494 R427 R468 R423 R420 R433 R432 L404 R461 C484 R425 R424 R422 Q413 Q407 C443 R496 R483 R482 CP721 CP720 CP719 CP718 CP716 CP715 CP7...

Страница 56: ...2 R29 L204 L205 R208 Q200 R205 R210 R211 R69 C210 C217 D10 D201 C202 C204 C205 C238 C87 C82 C83 R200 D202 L15 D11 D200 D203 D204 L206 C232 C40 C41 R31 R306 Q304 Q303 R300 C222 C226 R335 R334 R301 R320 R321 R303 R337 R339 R323 R328 R324 R325 R331 R416 R479 C442 C441 C420 C433 C422 C424 C427 C432 C439 C446 C445 C419 IC401 IC409 1 1 1 3 3 3 4 4 5 4 6 6 R480 R484 R486 R487 R469 R489 R467 R493 C483 R46...

Страница 57: ...T R P N L J H F D B S Q O M K I G E C A 1 3 5 7 2 4 6 SCHEMATIC DIAGRAM TK 290 Note Components marked with a dot are parts of pattern 1 64 ...

Страница 58: ...TK 290 SCHEMATIC DIAGRAM 65 Note Components marked with a dot are parts of pattern 1 A C E G I B D F H J 1 3 5 7 2 4 6 ...

Страница 59: ...0SI2 5 IC414 AT29C020 90TI Latch IC415 TC7S02F Shift Register IC400 403 404 405 BU4094BCFV RF X57 539 L14 L202 205 206 XF301 IC7 NJM2904V 1 2 L12 SW SW SW IC1 TDA7053AT SW NJM2904V MIC Amp AF Amp INT MIC Main INT MIC N C IC3 D400 1SR154 400 Protect Power SW SB SW Q415 2SJ517 Q412 2SK1824 Regulate IC402 TK11250BM Regulate IC401 TK11250BM IC409 PST9132NR LCD LCD Driver IC101 LC75824W PF1 PF2 Toggle ...

Страница 60: ...ms 37 0mVrms 305mVrms 305mVrms 290mVrms 445mVrms 115mVrms MIC MAIN IC3 NC AMP IC607 IC605 1 2 VCO IC10 PLL C42 3 2dBm Q5 Q6 Q8 C45 RX LO D7 0 8dBm 2 3dBm 9 7dBm C59 C69 ANT 5 0W Power module RF 155 0MHz RF 155 0MHz AF AF AF IF 44 85MHz IF2 455kHz To make measurements in the AF section con nect the AC level meter ANT input 53dBm 1kHz FM 3kHz DEV In the RF section use a 1000pF coupling ca pacitor Th...

Страница 61: ...er power switch 20 5M 5V 21 MICE MIC GND 22 MIC I MIC signal input 23 AF O Audio output 24 AFE Audio GND 25 AFE Audio GND CN No Pin No Name I O Function 26 SP I BTL input for external speaker 27 SP I BTL input for external speaker 28 MUTE O Audio mute signal output 29 SD TO O For optional board 30 MAN D O For optional board 31 LAMP O Backlight LED control Normally 0V Lighting 7 5V 32 Q7 O Key scan...

Страница 62: ... OPPTT I For optional board See page 22 33 TCONT I For optional board See page 22 CN2 1 AFE Audio GND for X57 2 AFE Audio GND CN3 1 Q8 O Key scan IC Q8 signal output 2 Q7 O Key scan IC Q7 signal output 3 PTTE PTT GND 4 PTT I Normally 5V transmit when connected GND 5 KI1 I Key input 6 Q6 O Key scan IC Q6 signal output CN4 1 BTL output for internal speaker 2 BTL output for internal speaker CONTROL U...

Страница 63: ...8 Lever PTT E04 0415 08 RF coaxial receptacle 26 E30 3287 08 Lead wire with plug assy 25 E30 3322 08 Lead wire with plug assy 26 J29 0644 08 Clip assy J42 0495 08 Bushing S70 0459 08 Tact switch T07 0359 08 Speaker T91 0584 08 MIC element N08 0535 08 Dressed screw KMC 25 26 SPEAKER MICROPHONE KMC 25 26 Circuit Diagram PTT PF SSW MSW E Universal connector SP MIC SP SP 100P 5V MIC ME 1mH KMC 26 1mH ...

Страница 64: ... Charging KNB 17A Voltage 7 2V Battery capacity 1500mAh Charging time Approx 8 hours KSC 20 External View KSC 20 Specifications Charging current 1100mA 150mA Charging time KNB 17A 80 min 24 Source voltage Approx 15V Ambient temperature 0 C 40 C Dimensions 105 W x 135 D x 52 H mm Weight 0 18kg KRA 14 External View M 148 162MHz M2 162 174MHz M3 136 150MHz ...

Страница 65: ...Fong N T Hong Kong KENWOOD ELECTRONICS TECHNOLOGIES S PTE LTD Sales Marketing Division 1 Ang Mo Kio Street 63 Singapore 569110 SPECIFICATIONS GENERAL Frequency Range 136 to 174MHz Number of Channels 160 channels Channel Spacing Wide 25kHz 30kHz Narrow 12 5kHz 25kHz PLL channel step 5kHz 6 25kHz 7 5kHz Battery Voltage 7 5V DC 20 Battery Life 10 hours at 5W 5 5 90 duty cycle Temperature Range 30 C t...

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