Kenwood TK-385 Service Manual
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Kenwood TK-385 Service Manual

Kenwood TK-385 Service Manual

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UHF FM TRANSCEIVER
TK-385
SERVICE MANUAL
Panel assy
(A62-0535-04)
Knob (PTT etc)
(K29-5157-03)
Photo is K type with KRA-15
Whip antenna (KRA-15)
(T90-0682-05):K
(OPTION)
Knob (ENC)
(K29-5232-03)
Knob (VOL)
(K29-5231-03)
Badge
(B43-1106-14)
Cabinet assy
(A02-2055-53)
(16 keys)
Packing
(G53-0896-02)
(16 keys)
©
2000-6 PRINTED IN JAPAN
B51-8531-00(S) 821
CONTENTS
GENERAL ................................................................................. 2
SYSTEM SET-UP ..................................................................... 2
OPERATING FEATURES ......................................................... 3
REALIGNMENT ........................................................................ 4
CIRCUIT DESCRIPTION .......................................................... 6
SEMICONDUCTOR DATA ..................................................... 11
DESCRIPTION OF COMPONENTS ....................................... 13
PARTS LIST ............................................................................ 14
EXPLODED VIEW .................................................................. 21
PACKING ................................................................................ 22
ADJUSTMENT ........................................................................ 23
TERMINAL FUNCTION .......................................................... 32
DISPLAY UNIT (X54-3210-12) .......................................... 33
TX-RX UNIT (X57-6200-10) .............................................. 39
SCHEMATIC DIAGRAM ......................................................... 45
BLOCK DIAGRAM .................................................................. 49
LEVEL DIAGRAM ................................................................... 51
OPTIONS ................................................................................ 52
SPECIFICATIONS ............................................... BACK COVER
CAUTION
When using an external power connector, please use
with maximum final module protection of 9V.

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Summary of Contents for Kenwood TK-385

  • Page 1: Table Of Contents

    UHF FM TRANSCEIVER TK-385 SERVICE MANUAL © 2000-6 PRINTED IN JAPAN B51-8531-00(S) 821 CONTENTS GENERAL ................. 2 Whip antenna (KRA-15) (T90-0682-05):K SYSTEM SET-UP ..............2 (OPTION) OPERATING FEATURES ............3 Knob (ENC) REALIGNMENT ................ 4 (K29-5232-03) CIRCUIT DESCRIPTION ............6 Knob (VOL) SEMICONDUCTOR DATA .............

  • Page 2: General

    SYSTEM SET-UP Merchandise received Frequency range (MHz) RF power Type Choose the type of transceiver TX/RX 450~470 TK-385 K 4.0W Transceiver programming A personal computer (IBM PC or compatible), programming interface (KPG-36), and programming software (KPG-62D) are required for programming.

  • Page 3: Operating Features

    OPERATING FEATURES 1. Operation Features 2-3. Key functions Trunking mode The TK-385 is a UHF FM Radio designed in both Trunking 2 Rotary encoder Mode and Conventional Mode. Rotate this encoder to select your desired call address (voice calls) ot status (status calls).

  • Page 4: Realignment

    5-2. Connection procedure 1. Connect the TK-385 to the personal computer with the interface cable. REALIGNMENT 2. When the POWER switch on, user mode can be entered immediately.
  • Page 5 3. Set the firmware to be updated by File name item. The KPG-36 connects the universal connector of the TK- 4. Turn the TK-385 power ON with the [A] switch held down. 385 to the computers RS-232C serial port. Hold the switch down until the display changes to "PROG 57600".

  • Page 6: Circuit Description

    TK-385 CIRCUIT DESCRIPTION 1. Overview 3. Receiver System 3-1. RF unit This transceiver is UHF/FM portable transceiver designed to operate in the frequency range of 450 to 470MHz (K). An incoming RF signal from the antenna terminal is passed through the antenna switch (D12, D14. D15 and D401 are off) and then the bandpass filter (L47,48,49,51,52,54,55,56).
  • Page 7 TK-385 CIRCUIT DESCRIPTION 3-5. Squelch circuit 3-3. Audio amplifier circuit The demodulated signal from IC12 goes through the mute The output from IC12 enters FM IC again, then passed switch (Q15) and is amplified by IC4 (2/2), high-pass filtered, through a band-pass filter. The noise component output from...
  • Page 8 1 of the VCXO. The output of the VCXO MUTE DTMF EXT. is applied to pin 8 of the PLL IC. The TK-385’s VCO consists of 2VCO and covers a dual range IC13 Q300 IC25 (1/2) of the 405.15~425.15MHz and the 450~470MHz. The VCO...
  • Page 9 TK-385 CIRCUIT DESCRIPTION 6-2. Low battery warning 6. Control Circuit The battery voltage is monitored by the microprocessor The control circuit consists of microprocessor (IC19) and (IC19). When the battery voltage falls below the voltage set by its peripheral circuits. It controls the TX-RX unit and transfers the Low Battery Warning adjustment, the red LED flashes to data to and from the display unit.
  • Page 10 TK-385 CIRCUIT DESCRIPTION 7-2. Decode 7. Signalling Circuit Low-speed data (QT,DQT) 7-1. Encode The demodulated signal from the IF IC (IC12) is amplified Low-speed data (QT,DQT) by IC4 (2/2) and passes through a low-pass filter (IC11) to Low-speed data is output from pin 1 of the CPU. The signal remove audio components.

  • Page 11: Semiconductor Data

    TK-385 CIRCUIT DESCRIPTION / SEMICONDUCTOR DATA 9. Optional Board Terminal Microprocesser : 30620M8A-394GP (TX-RX UNIT : IC19) Terminals for mounting the option board are provided at Pin function the bottom edge of the TX-RX unit. The table below shows the correspondence between the board and terminals.

  • Page 12: Semiconductor Data

    TK-385 SEMICONDUCTOR DATA Port PLL System : SA7025DK (TX-RX Unit : IC14) Function Name Block diagram 50~59 A9~A18 Flash memory address bus. Flash memory address bus. GND. 63~70 A0~A7 Flash memory address bus. MONI Monitor switch input. Encoder pulse input 4.

  • Page 13: Description Of Components

    TK-385 DESCRIPTION OF COMPONENTS DISPLAY UNIT (X54-3210-12) Ref. No. Use/Function Operation/Condition Ref. No. Use/Function Operation/Condition IC300 Audio power amplifier Transistor IF W/N switch sets to on when Wide IC301 Counter /Key scan Transistor Ripple filter Q300 DC switch / INT MIC on/off...

  • Page 14: Parts List

    TK-385 PARTS LIST L: Scandinavia K: USA P: Canada ∗ New Parts. indicates safety critical components. Y: PX (Far East, Hawaii) T: England E: Europe Parts without Parts No. are not supplied. Y: AAFES (Europe) X: Australia M: Other Areas Les articles non mentionnes dans le Parts No.
  • Page 15 TK-385 PARTS LIST DISPLAY UNIT (X54-3210-12) TX-RX UNIT (X57-6200-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts CP300,301 R90-0723-05 MULTI-COMP 47K TX-RX UNIT (X57-6200-10) CP302,303 R90-0724-05 MULTI-COMP 1K CK73GB1H471K CHIP C 470PF...
  • Page 16 TK-385 PARTS LIST TX-RX UNIT (X57-6200-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C65 ,66 CC73GCH1H820J CHIP C 82PF C133 CC73GCH1H050B CHIP C 5.0PF CK73GB1C104K CHIP C 0.10UF C134 CK73GB1E153K CHIP C 0.015UF K...
  • Page 17 TK-385 PARTS LIST TX-RX UNIT (X57-6200-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C205 CC73GCH1H101J CHIP C 100PF CN5 -12 E23-1081-05 TERMINAL C206 CC73GCH1H2R5B CHIP C 2.5PF C207 CC73GCH1H030B CHIP C 3.0PF...
  • Page 18 TK-385 PARTS LIST TX-RX UNIT (X57-6200-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R90-0718-05 MULTI-COMP 4.7K RK73GB1J564J CHIP R 560K 1/16W CP4 ,5 R90-0743-05 MULTIPLE RESISTOR 47K RK73GB1J123J CHIP R 1/16W...
  • Page 19 TK-385 PARTS LIST TX-RX UNIT (X57-6200-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R131 RK73GB1J470J CHIP R 1/16W R271 RK73GB1J222J CHIP R 2.2K 1/16W R132 RK73GB1J684J CHIP R 680K 1/16W R272...
  • Page 20 TK-385 PARTS LIST TX-RX UNIT (X57-6200-10) SUB UNIT (X58-4592-71) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts IC11 TC75W51FU IC(ACTIVE FILTER) CC73HCH1H060B CHIP C 6.0PF CC73HCH1H100B CHIP C 10PF IC12 TA31136FN IC(FM IF)

  • Page 21: Exploded View

    TK-385 EXPLODED VIEW Display unit (A/2) A NUT :N14-0569-04 B M2.6x4 :N30-2604-46 C M2.6x10 :N30-2610-46 D M2.6x6 :N67-2606-46 :N79-2025-46 F M2x5 :N83-2005-46 IC100 Sub unit 20 56 TX-RX unit Display unit (B/2) (CHASSIS) S/NO label (ESN) S/NO label Parts with the exploded numbers larger than 700 are not supplied.

  • Page 22: Packing

    TK-385 PACKING Warranty card 39 Carton board (H13-1072-04) 7 Instrution manual (B62-1264-00) 3 Cap (B09-0363-03) 53 Screw set (N99-2004-05) 38 Packing fixture (H12-3014-02) 43 Hook (J29-0685-05) 40 Item carton case S/NO label (ESN) (H52-1576-02) UPC code label...

  • Page 23: Adjustment

    TK-385 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications Standard Signal Generator Frequency Range 400 to 470MHz (SSG) Modulation Frequency modulation and external modulation. Output -127dBm/0.1µV to greater than -47dBm/1mV Power Meter Input Impedance 50Ω. Operation Frequency 400 to 470MHz or more.
  • Page 24 ADJUSTMENT • Panel tuning Repair Jig (Chassis) Use jig (part No.: W05-0825-00) for repairing the TK-385. Place the TX-RX unit on the jig and fit it with 7 screws. The jig facilitates the voltage check and protects the module 2: RED (RX AF OUTPUT) when the voltage on the flow side of the TX-RX unit is checked during repairs.

  • Page 25: Test Mode

    You must adjust the frequencies in all channels as shown and 2400bps mode. above, even though the channel frequencies in the 2 row are Release FNC FNC ON. below the specifications of the TK-385. Compander function RF power HIGH and ON and OFF. LOW. Signalling Beat shift ON and OFF Changes signalling.
  • Page 26 You must adjust the frequencies in all test channels as shown above, even though the test channel frequencies in the Tuning mode L and L2 rows are below the specifications of the TK-385. FREQ xxx 5-point tuning ex.RF Power High...
  • Page 27 TK-385 ADJUSTMENT Common Section Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 1. Setting 1) BATT terminal voltage:7.5V 2) SSG Standard modulation MOD:1kHz, DEV:1.5kHz 2. VCO lock [Panel Test Mode] voltage 1) CH-Sig:2-1 Power meter...
  • Page 28 TK-385 ADJUSTMENT Transmitter Section [Panel Tuning Mode except when Panel TEST Mode is specified.] Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 7. DQT Balance 1) Adj item [BAL] Power meter Panel Panel Encoder Make the Adjust Adjust [∗∗∗]...
  • Page 29 TK-385 ADJUSTMENT Transmitter Section [Panel Tuning Mode except when Panel TEST Mode is specified.] Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method ±0.05kHz 14.TONE 1) Adj item [TONE] Power meter Panel Panel Encoder 1.45kHz Deviation Adjust [∗∗∗]...
  • Page 30 TK-385 ADJUSTMENT Receiver Section [Panel Tuning Mode except when Panel TEST Mode is specified.] Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 1. Sensitivity 1) Adj item [SENS] Tracking Panel Panel Encoder Adjustment Adjust Adjust [∗∗∗] (K)
  • Page 31 TK-385 ADJUSTMENT Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 6. RSSI 1) Adj item [HRSI] Panel After input (High) Adjust [∗∗∗] AF VTVM Universal signal from Adjust SSG OUT: Oscilloscope connector SSG,press -70dBm (70.7µV) [D] key.

  • Page 32: Terminal Function

    TK-385 TERMINAL FUNCTION CN No. Pin No. Name I/O Function CN No. Pin No. Name I/O Function TX-RX UNIT (X57-6200-10): TX-RX section KEY output Power input after passing through KEY output the fuse. Key scan IC reset input Power input after passing through Data input for LCD driver/decade counter.

  • Page 33: Pc Board Views

    TK-385 PC BOARD VIEW DISPLAY UNIT (X54-3210-12) Component Side View DISPLAY UNIT (X54-3210-12) X54-3210-12 (B/2) S301 S302 S303 J72-0517-22 LAMP LCD ASSY CN302 ∗ D301 X54-3210-12 (A/2) – J72-0517-22 Component side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Foil side...
  • Page 34 TK-385 PC BOARD VIEW DISPLAY UNIT (X54-3210-12) Foil Side View CN303 X54-3210-12 (B/2) J72-0517-22 DISPLAY UNIT (X54-3210-12) D321 R300 R302 R304 CN301 CN300 R303 R305 R301 C302 R311 R312 Q300 R306 CP300 R325 L309 R338 C331 C328 D320 R324 Q301...
  • Page 35 TK-385 PC BOARD VIEW DISPLAY UNIT (X54-3210-12) Component Side + Foil Side View CN303 X54-3210-12 (B/2) S301 S302 S303 J72-0517-22 LAMP DISPLAY UNIT (X54-3210-12) D321 R300 R302 LCD ASSY R304 CN301 CN300 R303 R305 CN302 R301 C302 R312 R311 Q300...

  • Page 36: Tx-Rx Unit (X57-6200-10)

    TK-385 PC BOARD VIEW TX-RX UNIT (X57-6200-10) Component Side View TX-RX UNIT (X57-6200-10) MONI R266 C241 LAMP IC100 R270 C230 C223 R110 X57-6200-10 R259 R416 C139 C102 J72-0735-12 C215 C141 C124 C200 C125 C119 5CNS R115 C251 D401 R279 D402...
  • Page 37 TK-385 PC BOARD VIEW TX-RX UNIT (X57-6200-10) Foil Side View TX-RX UNIT R100 (X57-6200-10) IC16 C248 R114 R109 R276 R299 C137 R154 C120 R280 C261 IC17 R116 C121 X57-6200-10 CN10 C213 C189 R219 R407 C122 R255 C192 J72-0735-12 C231 R271...
  • Page 38 TK-385 PC BOARD VIEW TX-RX UNIT (X57-6200-10) TX-RX UNIT (X57-6200-10) Component Side + Foil Side View IC16 R100 MONI R266 C241 C248 LAMP R270 IC100 R109 R114 R276 C120 C230 R299 R116 R154 R280 C261 IC17 C137 C121 C223 R110...

  • Page 39: Schematic Diagram

    TK-385 SCHEMATIC DIAGRAM SCN LO • Note) Ref. No. : Parts of pattern 1.

  • Page 40: Block Diagram

    TK-385 TK-385 TK-385 TK-385 BLOCK DIAGRAM LEVEL DIAGRAM KNB-16A/17A (Ni-Cd BATTERY) / KPG-36 (PROGRAMMING INTER- FACE CABLE) / KSC-19 (CHARGER) / KRA-15 (WHIP ANTENNA) KNB-16A KNB-17A KPG-36 External View External View External View KNB-16A KNB-17A KSC-19 External View Circuit Diagram...
  • Page 41 TK-385 KMC-25 (SPEAKER MICROHONE) Circuit Diagram External View Specifications Microphone Impedance ......2kΩ Sensitivity ........ -65dB±4.0dB at 1kHz Speaker Impedance ......16Ω Input ........0.5W Maximum input ......1.5W Dimensions ........62W x 81 H x 29 D (mm) Weight (With plug cord) ....Approx. 0.17kg...

  • Page 42: Specifications

    KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD. KENWOOD ELECTRONICS U.K. LIMITED Sales Marketing Division KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom 1 Ang Mo Kio Street 63, Singapore 569110 KENWOOD ELECTRONICS EUROPE B.V. Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands...

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