Kenwood TK-390 Service Manual Download

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Antenna
(KRA-15 : Option)

Cabinet assy
(A02-2140-63)

Knob assy (SEL)
(K29-5282-04)

Knob assy (VOL)
(K29-5283-04)

Panel assy
(A62-0537-53)

Knob assy
(Side key)
(K29-5441-04)

Key top (10key)
(K29-5193-23)

UHF FM TRANSCEIVER

TK-390

SERVICE MANUAL

Photo is TK-390 K4 type.
Does not come with antenna.
Antenna is available as an option.

CONTENTS

GENERAL ................................................................. 2

SYSTEM SET-UP ..................................................... 2

OPERATING FEATURES ......................................... 3

REALIGNMENT ...................................................... 11

CIRCUIT DESCRIPTION ......................................... 17

SEMICONDUCTOR DATA ..................................... 25

DESCRIPTION OF COMPONENTS ....................... 26

PARTS LIST ............................................................ 28

EXPLODED VIEW .................................................. 36

PACKING ................................................................ 37

DISASSEMBLY FOR REPAIR ................................ 38

ADJUSTMENT ....................................................... 39

PC BOARD VIEWS

FINAL UNIT (X45-3590-10) ............................... 50

CONTROL UNIT (X53-3930-XX) ....................... 51

TX-RX UNIT (X57-5400-XX) ............................. 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-15 (ANTENNA) .............................................. 73

SPECIFICATIONS ............................... BACK COVER

CAUTION
When using an external power connector,
please use with maximum final module protec-
tion of 10V

REVISED II

Summary of Contents for TK-390

Page 1: ...CIRCUIT DESCRIPTION 17 SEMICONDUCTOR DATA 25 DESCRIPTION OF COMPONENTS 26 PARTS LIST 28 EXPLODED VIEW 36 PACKING 37 DISASSEMBLY FOR REPAIR 38 ADJUSTMENT 39 PC BOARD VIEWS FINAL UNIT X45 3590 10 50 CONTROL UNIT X53 3930 XX 51 TX RX UNIT X57 5400 XX 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 7...

Page 2: ...cal blasting 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 ...

Page 3: ... 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...

Page 4: ...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...

Page 5: ...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 ...

Page 6: ...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...

Page 7: ...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...

Page 8: ...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...

Page 9: ...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...

Page 10: ...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...

Page 11: ...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...

Page 12: ...for setting with the 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 Remark...

Page 13: ...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...

Page 14: ...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...

Page 15: ...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...

Page 16: ...w opens on the display to indicate progress of writing When the TK 390 starts to receive data PG is appeared on 2 digit sub display 8 If writing ends successfully the red LED on the TK 390 lights and the checksum is displayed 9 If you want to continue programming other TK 390s 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...

Page 17: ...tor frequency of 44 395MHz to generate the 2nd IF of 455kHz The 455kHz signal is then passed through a ce ramic filter CF300 CF301 Wide CF302 CF303 Narrow and fed back into IC300 for additional amplification ANT TX RX 450 490MHz K K4 470 512MHz K2 403 430MHz K3 K6 ANT SW RF AMP PA AMP TX AMP 1st MIX MCF 44 85MHz XF301 CF 455kHz CF300 301 Wide CF302 303 Narrow FM IF SYSTEM AF AMP SP 44 395MHz 405 1...

Page 18: ...alled 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 ...

Page 19: ... 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 SW LIM...

Page 20: ...h D7 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 or 6 25kHz 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 pulsed output signal of t...

Page 21: ...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...

Page 22: ...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 ...

Page 23: ...Pin 41 Expander output pin The TK 390 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...

Page 24: ...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...

Page 25: ...all check No H 39 P72 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 ...

Page 26: ...6 Ref No Use Function Operation Condition IC1 Audio power amplifier 0 5W 16Ω BTL method IC2 Shift register IC3 MIC noise canceling circuit IC4 Option board MAND AND circuit control switch MAND H OUT 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...

Page 27: ...ge control Q10 DC switch APC off Speed up Q13 DC switch D A port protection Q200 201 RF amplifier RX front Ref No Use Function Operation Condition Q301 Noise amplifier RX on 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 swi...

Page 28: ...S 42 1B G53 0823 04 PACKING SP 43 2A G53 0874 03 PACKING RING 44 3A G53 1511 04 PACKING BATT 45 3A G53 1518 04 PACKING BATT TERMINAL 47 2C H12 3018 02 PACKING FIXTURE 48 1C H25 0029 04 PROTECTION BAG 49 3D H52 1085 02 ITEM CARTON CASE 51 2A J19 5330 14 HOLDER BATT REALEASE 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 UNI...

Page 29: ...P R 1 8K J 1 16W R35 RK73GB1J103J CHIP R 10K J 1 16W R36 RK73GB1J182J CHIP R 1 8K J 1 16W R37 42 RK73GB1J102J CHIP R 1 0K J 1 16W K4 K6 R43 44 RK73GB1J473J CHIP R 47K J 1 16W R45 49 RK73GB1J102J CHIP R 1 0K J 1 16W K K2 K3 R45 55 RK73GB1J102J CHIP R 1 0K J 1 16W K4 K6 R56 RK73GB1J153J CHIP R 15K J 1 16W R57 R92 1252 05 CHIP R 0 OHM R59 RK73GB1J102J CHIP R 1 0K J 1 16W R60 R92 1252 05 CHIP R 0 OHM ...

Page 30: ...f No Address Parts No Description Ref No Address Parts No Description New Desti parts nation New Desti parts nation C100 C92 0560 05 CHIP TAN 10UF 6 3WV C101 CK73FB1C105K CHIP C 1 0UF K C150 CC73GCH1H020C CHIP C 2 0PF C K3 K6 C150 CC73GCH1H030C CHIP C 3 0PF C K K2 K4 C200 CC73GCH1H030B CHIP C 3 0PF B K2 K3 K6 C200 CC73GCH1H2R5B CHIP C 2 5PF B K K4 C201 CC73GCH1H020C CHIP C 2 0PF C K2 C201 CC73GCH1...

Page 31: ...CK73GB1C104K CHIP C 0 10UF K C479 CC73GCH1H271J CHIP C 270PF J C480 CC73GCH1H221J CHIP C 220PF J C481 CK73FB1C105K CHIP C 1 0UF K C482 CK73GB1C104K CHIP C 0 10UF K C483 CK73GB1H102K CHIP C 1000PF K C484 C92 0560 05 CHIP TAN 10UF 6 3WV C485 CK73GB1H102K CHIP C 1000PF K C487 CK73GB1C104K CHIP C 0 10UF K C488 CK73GB1H102K CHIP C 1000PF K K3 K6 C600 CK73GB1C473K CHIP C 0 047UF K C601 C92 0003 05 CHIP ...

Page 32: ...BLOCK L212 L40 8275 44 SMALL FIXED INDUCTOR 82 0NH L214 L40 8275 44 SMALL FIXED INDUCTOR 82 0NH L215 216 L39 1272 05 TOROIDAL COIL L217 L92 0140 05 FERRITE CHIP L218 L39 1272 05 TOROIDAL COIL L219 L40 8275 44 SMALL FIXED INDUCTOR 82 0NH L220 L40 1575 44 SMALL FIXED INDUCTOR 15 0NH K K4 L221 222 L92 0176 05 FERRITE CHIP L300 L40 1095 34 SMALL FIXED INDUCTOR 1UH L301 L40 3391 37 SMALL FIXED INDUCTOR...

Page 33: ...12K J 1 16W R320 RK73GB1J392J CHIP R 3 9K J 1 16W R321 RK73GB1J102J CHIP R 1 0K J 1 16W R323 RK73GB1J471J CHIP R 470 J 1 16W R324 325 RK73GB1J223J CHIP R 22K J 1 16W R328 RK73GB1J472J CHIP R 4 7K J 1 16W R329 RK73GB1J104J CHIP R 100K J 1 16W R330 R92 1252 05 CHIP R 0 OHM R331 RK73GB1J104J CHIP R 100K J 1 16W R332 RK73GB1J224J CHIP R 220K J 1 16W R333 R92 1252 05 CHIP R 0 OHM R334 RK73GB1J100J CHIP...

Page 34: ...GB1J564J CHIP R 560K J 1 16W R644 RK73GB1J474J CHIP R 470K J 1 16W R645 RN73GH1J274D CHIP R 270K D 1 16W R646 RK73GB1J472J CHIP R 4 7K J 1 16W R647 R92 1252 05 CHIP R 0 OHM R648 RN73GH1J913D CHIP R 91K D 1 16W R649 RN73HH1J682D CHIP R 6 8K D 1 16W R650 RK73GB1J103J CHIP R 10K J 1 16W R651 RK73GB1J155J CHIP R 1 5M J 1 16W Ref No Address Parts No Description Ref No Address Parts No Description New D...

Page 35: ...Q4 2SC4617 S TRANSISTOR Q5 2SC5108 Y TRANSISTOR Q6 2SC5110 O TRANSISTOR Q7 DTC114EE DIGITAL TRANSISTOR Q8 2SC4988 TRANSISTOR Q9 DTA144EE DIGITAL TRANSISTOR Q10 DTC144EE DIGITAL TRANSISTOR Q13 2SK1824 FET Q200 201 3SK293 FET Q301 2SC4617 S TRANSISTOR Q302 2SK1215 E FET Q303 DTA144EE DIGITAL TRANSISTOR Q304 DTC144EE DIGITAL TRANSISTOR Q305 UMC4 TRANSISTOR Q400 UMG3N TRANSISTOR Q401 UPA572T FET Q402 ...

Page 36: ...E G A N14 0578 04 B N14 0594 04 C M2 6 x 8 BLK N30 2608 45 D M2 6 x 5 N67 2605 46 E M2 x 3 N78 2030 46 F M2 x 3 5 N79 2035 46 G M2 x 4 N83 2004 46 H M2 x 5 BLK N83 2005 45 J M2 6 x 5 Bi Tap N89 2605 46 A G Gx2 J F D G X45 G D F Cx2 701 Hx2 Hx2 X53 A 6 X53 C 6 X53 E 6 X53 D 6 X53 F 6 X53 B 6 X53 E 6 22 29 37 55 27 26 41 59 73 75 30 K3 K6 60 3 IC801 19 19 40 40 45 14 44 2 X57 5 35 68 67 25 56 61 76 ...

Page 37: ...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 1085 02 13 Instruction manual B62 0816 30 702 Warranty card UPC code label Parts with the exploded numbers larger than 700 are not supplied ...

Page 38: ...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...

Page 39: ...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...

Page 40: ...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...

Page 41: ...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...

Page 42: ...e Power meter Panel ANT Panel Top1 470 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 4 0W or more power CH No 3 check Signalling No 1 Ammeter BATT terminal voltage 7 5V Select POW 255 in panel ...

Page 43: ...s adjustment Signalling No 1 Select POW LO in panel tuning mode 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 ...

Page 44: ...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...

Page 45: ...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...

Page 46: ... 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 ...

Page 47: ...oil so that the waveform is peaked CH No 2 generator L210 The frequency with the peak waveform does not Use this Connect the spectrum have to be the center frequency adjustment analyzer to TP3 Spectrum TX RX TP3 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 adjustme...

Page 48: ...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...

Page 49: ...arrow Audio 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 2 SSG outpu...

Page 50: ...A C E B D 1 3 5 7 2 4 6 TK 390 PC BOARD VIEW 50 FINAL UNIT X45 3590 10 Component side view K3 K6 L801 C801 OUT VCC Vcont IN C802 J72 0654 12 C803 C805 C806 C804 IC801 ...

Page 51: ... 8 0 1 4 7 TOGGLE SW TGL F 6 B 6 C 6 D 6 TOP2 TOP1 D102 R105 CN501 D103 D7 D9 D6 D8 D104 INT MIC MAIN TK 390 PC BOARD VIEWS 51 52 CONTROL UNIT X53 3930 XX 13 K K2 14 K4 15 K3 16 K6 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 ...

Page 52: ...5CM MICE 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 R68 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 PTT...

Page 53: ...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 R55 L152 C666 ...

Page 54: ...2 C239 C253 R216 L216 L218 R217 XF301 R308 C305 C315 C331 C330 C311 C307 CD300 C319 C317 C310 C320 D300 Q301 C309 R743 R336 R304 R341 R307 R319 R317 R318 R315 R305 TH301 Q305 1 2 3 5 R27 C37 C99 D6 Q4 R33 D7 IC10 5 8 1 4 C321 C337 C333 L300 IC300 1 8 9 16 X300 CF300 CF302 CF301 CF303 R28 R333 R332 R329 C323 C43 IC301 1 3 4 5 C19 R74 R80 C95 C93 C94 C10 C96 C17 L21 R73 IC5 1 10 11 20 C33 Q3 R24 C36...

Page 55: ... R31 R306 D301 Q304 Q303 R340 R300 C228 C229 C234 C238 D204 C231 C215 C212 L221 L203 L15 L200 C213 C206 C200 C201 R205 L13 C82 R71 C80 C77 D10 D11 D200 R206 R203 C251 C210 C87 C92 C91 C90 C88 C89 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 R46...

Page 56: ...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 390 Note Components marked with a dot are parts of pattern 1 64 ...

Page 57: ...A C E G I B D F H J 1 3 5 7 2 4 6 TK 390 SCHEMATIC DIAGRAM 65 Note Components marked with a dot are parts of pattern 1 ...

Page 58: ... TC75W51FU 2 2 IC602 TC75W01FU 1 2 IC604 TC75W51FU 2 2 Flash ROM EEPROM IC412 AT2408N10SI2 5 IC414 AT29C020 90TI Latch IC415 TC7S02F Shift Register IC400 403 404 405 BU4094BCFV RF X57 540 L14 L210 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...

Page 59: ...mVrms 300mVrms 450mVrms 115mVrms MIC MAIN IC3 NC AMP IC607 IC605 1 2 VCO IC10 PLL C42 0 3dBm Q5 Q6 Q8 C45 RX LO D7 4 1dBm 8 3dBm 10 5dBm C59 C69 ANT 4 0W Power module RF RF AF AF AF IF 44 85MHz IF2 455kHz L216 L218 C49 To make measurements in the AF section con nect the AC level meter ANT input 47dBm 1kHz FM 3kHz DEV In the RF section use a 1000pF coupling ca pacitor The display shows the SSG inpu...

Page 60: ...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...

Page 61: ... 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...

Page 62: ...4 12K 2 7K 2 7K 22K 22K 10µ 10µ 10µ 68K ECM SUB ECM MAIN JP 0 470P 470P 1K 1K 2 2K R12 0 SP Earphone jack ø3 5 If the earphone jack output is too high adjust the value of resistor R12 SW2 PTT 10K 27K PF1 PF2 EXT ANT KMC 26 KMC 25 26 Parts List New parts Ref No New Parts No Description Model parts A02 2092 08 Case Front 25 A02 2253 08 Case Front 26 A02 2093 08 Case Rear 25 A02 2254 08 Case Rear 26 ...

Page 63: ...ERFACE CABLE KRA 15 WHIP ANTENNA KSC 19 External View KSC 19 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 ...

Page 64: ...CTRONICS TECHNOLOGIES S PTE LTD Sales Marketing Division 1 Ang Mo Kio Street 63 Singapore 569110 SPECIFICATIONS GENERAL Frequency Range 450 to 490MHz K K4 470 512MHz K2 403 430MHz K3 K6 Number of Channels 160 channels Channel Spacing Wide 25kHz Narrow 12 5kHz PLL channel step 5kHz 6 25kHz Battery Voltage 7 5V DC 20 Battery Life 10 hours at 4W 5 5 90 duty cycle Temperature Range 30 C to 60 C 22 F t...

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Kenwood TK-390, Service Manual

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