Kenwood TK-380 Service Manual

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[Page 1] Kenwood TK-380

UHF FM TRANSCEIVER TK-380 © 2000-4 PRINTED IN JAPAN B51-8522-00(S) 553 SERVICE MANUAL GENERAL ................................................................................. 2 SYSTEM SET-UP ............................................................

[Page 2] Kenwood TK-380

TK-380 2 GENERAL / SYSTEM SET-UP INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains all required service information for t...

[Page 3] Kenwood TK-380

TK-380 3 OPERATING FEATURES 1. Operation Features The TK-380 is a UHF FM Radio designed in both 5tone Model and DTMF/2tone/DMS Model. The programmable features are summarized. This transceiver can handle up to 250 groups with 250 channels in each gro...

[Page 4] Kenwood TK-380

TK-380 4 OPERATING FEATURES 2-3. Programmable keys The FPU (KPG-60D) enables programmable keys to select the following functions. Function DTMF/2tone/DMS Model 5tone Model note None Yes Yes Auto Dial Yes Yes Auto Dial Programming Yes Yes AUX B Yes Ye...

[Page 5] Kenwood TK-380

TK-380 5 OPERATING FEATURES ■ Auto Dial To transmit the stored DTMF code automatically. When you select DTMF Encode in the “Auto Dial Mode” menu, Auto Dial, Re-Dial, Dial ID and Store & Send modes are available. Press the [Auto Dial] key to...

[Page 6] Kenwood TK-380

TK-380 6 OPERATING FEATURES ■ Lamp Press the [Lamp] key to toggle the display backlight ON or OFF. The backlight automatically turns OFF approximately 5 seconds after it is switched ON. Press any key other than [Lamp] while the backlight is ON to r...

[Page 7] Kenwood TK-380

TK-380 7 OPERATING FEATURES ■ Scrambler Press the [Scrambler] key to toggle the Scrambler ON or OFF. When it is activated, “_” (underscore) appears on LCD. If you hold down the Scrambler key for more than 2 seconds, the transceiver enters “Sc...

[Page 8] Kenwood TK-380

TK-380 8 OPERATING FEATURES 2-4. Display 3. Scan Operating 1) Scan types ● Single Group Scan You can scan all valid (ADD) channels in the displayed group that can be selected with the group selector. ● Multiple Group Scan You can scan all valid (...

[Page 9] Kenwood TK-380

TK-380 9 OPERATING FEATURES 7) Revert Channel The revert channel is used to transmit during scanning and set by the programming software (KPG-60D). 1 Priority The transceiver reverts to the priority channel 2 Priority with talkback The transceiver re...

[Page 10] Kenwood TK-380

TK-380 10 OPERATING FEATURES 9) "TOT" Reset Time The transceiver has "TOT" reset timer. This timer is the minimum wait time allowed during a transmission that will reset the "TOT" count. "TOT" reset time cause...

[Page 11] Kenwood TK-380

TK-380 11 AND/OR Option Signaling match conditions can be selected with AND/OR logic. Alert/Transpond AF Mute Open AND Triggers at match with QT/ Triggers at match with QT/ DQT/ID+DTMF(2tone);Both DQT/ID+DTMF(2tone); Both OR Triggers only for match w...

[Page 12] Kenwood TK-380

TK-380 12 OPERATING FEATURES ■ Short Messase (Optional) A maximum of 48 characters can be sent (External equipment is required). Received Short Messages will be displayed in the same manner as a Status Message. A maximum of 15 received messages c...

[Page 13] Kenwood TK-380

TK-380 13 OPERATING FEATURES 7. 5tone When you select 5tone Model, you can set the following options. When you select Basic level features, only 1 frame 5tone format can be programmed. When you select Full level features, up to 3 frame 5tone format c...

[Page 14] Kenwood TK-380

TK-380 14 ■ Copy from TX/RX Address You can select to copy the digit to the memory when you change the channel, using [Selector] key. The memory represents the code that is displayed by the keypad. Or Key Buffer, “^K1 ... ^K8” used by Encode Fo...

[Page 15] Kenwood TK-380

TK-380 15 OPERATING FEATURES ■ Key press tone [A] Sounds when a key is pressed. For toggle keys, sounds when toggle function is turned on (key press tone [B] sounds when it is turned off). ■ Key press tone [B] Sounds when a key is pressed. For ...

[Page 16] Kenwood TK-380

TK-380 16 5. PC Mode 5-1. Preface The TK-380 transceiver is programmed by using a personal computer, programming interface (KPG-36) and programming software (KPG-60D). The programming software can be used with an IBM PC or compatible. Figure 1 shows ...

[Page 17] Kenwood TK-380

TK-380 17 REALIGNMENT 8. If you want to continue programming other TK-380 s, repeat steps 4 to 7. Notes: ● This mode cannot be entered if the Firmware Programming mode is set to Disable in the Programming software (KPG- 60D). ● When programming t...

[Page 18] Kenwood TK-380

TK-380 18 REALIGNMENT 8-2. Channel Setting Mode This is a mode for making channel settings with the panel keys without using the FPU. Pressing [MON] when [SELF PROG] is displayed, sets Channel Setting Mode. Select an item set with [D] and change the ...

[Page 19] Kenwood TK-380

TK-380 19 REALIGNMENT 8-3. Memory Reset Mode This mode is used to clear data for functions that can be set in Self Programming Mode or to return to reset values (default). Pressing [A] when [SELF PROG] is shown, sets the display to [CLEAR NO?]. Turni...

[Page 20] Kenwood TK-380

TK-380 20 CIRCUIT DESCRIPTION 1. Overview This transceiver is UHF/FM portable transceiver designed to operate in the frequency range of 440 to 470MHz (E), 406 to 450MHz (E3). 2. Circuit Configuration by Frequency The receiver is a double-conversion s...

[Page 21] Kenwood TK-380

TK-380 21 CIRCUIT DESCRIPTION Fig. 3 Wide, Semi wide/Narrow changeover circuit 5R Q6 Q7 D5 R39 R42 C51 C9 R47 D7 R56 W/N "H" : Wide, Semi wide "L" : Narrow MXO IFI MXI AFO DM C100 R117 R71 C77 IC12 FM IF SYSTEM Q12 C61 R46 C49 CF...

[Page 22] Kenwood TK-380

TK-380 22 5. Frequency Synthesizer Unit 5-1. Frequency synthesizer The frequency synthesizer consists of the VCXO (X1), VCO (A1), PLL IC(IC14) and buffer amplifiers. The VCXO generates 16.8MHz. The frequency stability is 1.5ppm within the temperature...

[Page 23] Kenwood TK-380

TK-380 23 CIRCUIT DESCRIPTION 6-2. Low battery warning The battery voltage is monitored by the microprocessor (IC19). When the battery voltage falls below the voltage set by the Low Battery Warning adjustment, the red LED flashes to notify the operat...

[Page 24] Kenwood TK-380

TK-380 24 CIRCUIT DESCRIPTION 7-2. Decode ● Low-speed data (QT,DQT) The demodulated signal from the IF IC (IC12) is amplified by IC4 (2/2) and passes through a low-pass filter (IC11) to remove audio components. The signal is input to pin 95 of the ...

[Page 25] Kenwood TK-380

TK-380 25 CIRCUIT DESCRIPTION 8. Power Supply Circuit Battery +B is supplied via a 3A fuse from the battery terminal connected to the TX-RX unit. After passing through the power switch, power supply (SB) is applied to the three AVRs. IC5 supplies 5V ...

[Page 26] Kenwood TK-380

TK-380 26 SEMICONDUCTOR DATA Microprocesser : 30620M8A-394GP (TX-RX UNIT : IC19) ■ Pin function 1 LSDOUT O Low speed data output. 2 HSDOUT O High speed data output. 3 HSDIN I High speed data input. 4 DTMSTD I DTMF decode IC data detect input. 5 SEL...

[Page 27] Kenwood TK-380

TK-380 27 1 ES ES Strobe 2 DT DAT Data 3 CK Clock 4 Q1 AM1 Audio mute 1. H : Unmute, L : Mute 5 Q2 LOK TX Logic Signal output. Active logic level is Low. Logic type can select “TX Line” or “Mic PTT” in the KPG-60D. 6Q3 T/R TX/RX switching. H...

[Page 28] Kenwood TK-380

TK-380 28 SEMICONDUCTOR DATA Audio Processor : TC35453F (TX-RX Unit : IC13) ■ Block diagram 1 RXFO O RX audio filter output. 2 RXGS O RX audio signal level setting amplifier output. 3 RXIN I RX audio signal level setting amplifier input. 4 FFSKGS O...

[Page 29] Kenwood TK-380

TK-380 29 SEMICONDUCTOR DATA D/A Converter : M62364FP (TX-RX Unit : IC8) ■ Block diagram 1 VI1 I D/A converter input. 2,3 VO1,VO2 O 8-bit resolution D/A. 4 VI2 I D/A Converter input. 5 VDD - Power supply. 6 LD I When the LD is at the low level, th...

[Page 30] Kenwood TK-380

TK-380 30 SEMICONDUCTOR DATA PLL System : SA7025DK (TX-RX Unit : IC14) ■ Block diagram 1 CLOCK Serial clock input. 2 DATA Serial data input. 3 STROBE Serial strobe input. 4 Vss Digital ground. 5RFIN Prescaler positive input. 6 RFIN Prescaler negati...

[Page 31] Kenwood TK-380

TK-380 31 SEMICONDUCTOR DATA Voltage Detector : RN5VL42C (TX-RX Unit : IC3) ■ Block diagram (CMOS output) VCO System : X58-4592-XX (SUB Unit : A1) ■ Circuit diagram Counter : MC74HC4017F (Display Unit : IC301) ■ Logic circuit ● Input CLOCK (p...

[Page 32] Kenwood TK-380

TK-380 32 DESCRIPTION OF COMPONENTS IC1,2 IC Buffer amplifier IC3 IC Voltage detector / Reset IC4 IC Buffer amplifier IC5 IC Voltage regulator / 5M IC6 IC Voltage regulator / 5V IC7 IC Buffer amplifier IC8 IC D/A converter (Adjustment) IC9 IC Voltage...

[Page 33] Kenwood TK-380

TK-380 33 PARTS LIST ...

[Page 34] Kenwood TK-380

TK-380 PARTS LIST 34 Parts No. Description Address New parts Destination Destination TK-380 Ref. No. Parts No. Description Address New parts ∗ New Parts. indicates safety critical components. Parts without Parts No. are not supplied. Les art...

[Page 35] Kenwood TK-380

TK-380 PARTS LIST 35 Ref. No. Parts No. Description Address New parts Ref. No. Parts No. Description Address New parts Destination Destination L304,305 L92-0141-05 FERRITE CHIP L306,307 L92-0138-05 FERRITE CHIP L308,309 L92-0141-05 FERRITE CHIP CP300...

[Page 36] Kenwood TK-380

TK-380 PARTS LIST 36 Ref. No. Parts No. Description Address New parts Ref. No. Parts No. Description Address New parts Destination Destination ∗1 Note ∗1 C101:0.10UF capacitor is applied in the product having serial No. of 201XXXXX. (E type only)...

[Page 37] Kenwood TK-380

TK-380 PARTS LIST 37 Ref. No. Parts No. Description Address New parts Ref. No. Parts No. Description Address New parts Destination Destination C198 CC73GCH1H070B CHIP C 7.0PF B E C199 CC73GCH1H101J CHIP C 100PF J C200 C92-0565-05 CHIP-TAN 6.8UF 10WV ...

[Page 38] Kenwood TK-380

TK-380 PARTS LIST 38 Ref. No. Parts No. Description Address New parts Ref. No. Parts No. Description Address New parts Destination Destination L18 L39-1272-05 TOROIDAL COIL L19 L92-0138-05 FERRITE CHIP L20 L40-1571-36 SMALL FIXED INDUCTOR(15NH) L21 ,...

[Page 39] Kenwood TK-380

TK-380 PARTS LIST 39 Ref. No. Parts No. Description Address New parts Ref. No. Parts No. Description Address New parts Destination Destination ∗2 R65 RK73GB1J103J CHIP R 10K J 1/16W R66 R92-1252-05 CHIP R 0 OHM R67 RN73GH1J274D CHIP R 270K D 1/16W ...

[Page 40] Kenwood TK-380

TK-380 PARTS LIST 40 Ref. No. Parts No. Description Address New parts Ref. No. Parts No. Description Address New parts Destination Destination ∗3 R271 RK73GB1J222J CHIP R 2.2K J 1/16W R272 R92-1252-05 CHIP R 0 OHM R273 RK73GB1J223J CHIP R 22K J 1/1...

[Page 41] Kenwood TK-380

TK-380 PARTS LIST 41 Ref. No. Parts No. Description Address New parts Ref. No. Parts No. Description Address New parts Destination Destination C56 CC73HCH1H110J CHIP C 11PF J E3 C57 CC73HCH1H470J CHIP C 47PF J E3 C57 CK73HB1H102K CHIP C 1000PF K E C5...

[Page 42] Kenwood TK-380

TK-380 42 A B 1 2 3 EXPLODED VIEW Parts with the exploded numbers larger than 700 are not supplied. 52 51 26 27 5 1 25 41 50 49 48 14 SP 35 Display unit (A/2) F F 4 18 31 24 12 D D IC100 42 F Sub unit TX-RX unit 29 13 36 11 16 57 E 23 33 20 56 54 46 ...

[Page 43] Kenwood TK-380

TK-380 43 C D 1 2 3 PACKING 39 Item carton case (H52-1226-12) UPC code label 42 Hook (J29-0685-05) 3 Cap (B09-0363-03) 6 Instrution mamual (B62-1266-00) 38 Carton board (H13-1072-04) 37 Packing fixture (H12-3014-02) ANT Whip antenna (T90-0682-05):E (...

[Page 44] Kenwood TK-380

TK-380 44 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Generator Frequency Range 400 to 470MHz (SSG) Modulation Frequency modulation and external modulation. Output -127dBm/0.1µV to greater ...

[Page 45] Kenwood TK-380

TK-380 45 ADJUSTMENT Repair Jig (Chassis) Use jig (part No.: W05-0825-00) for repairing the TK-380. Place the TX-RX unit on the jig and fit it with 7 screws. The jig facilitates the voltage check and protects the module when the voltage on the flow s...

[Page 46] Kenwood TK-380

TK-380 46 ADJUSTMENT Test Mode ■ Test mode operating features This transceiver has a test mode. To enter test mode, press [B] key and turn power on. Hold [B] key until test channel No. and test signalling No. appears on LCD. Test mode can be inhi...

[Page 47] Kenwood TK-380

TK-380 47 ADJUSTMENT TEST Ch UHF-F1 E RX frequency (MHz) TX frequency (MHz) L 440.05000 440.10000 L2 447.05000 447.10000 C 455.05000 455.10000 H2 462.05000 462.10000 H 469.95000 469.90000 Press [A], now in tuning mode. Use [2 C] button to write t...

[Page 48] Kenwood TK-380

TK-380 48 ADJUSTMENT ■ Tuning mode n BAL xxx n MAX xxx n QT xxx n DQT xxx n DTMF xxx SENS xxx n TONE xxx n FFSK xxx FREQ xxx (5-point tuning) (5-point tuning) (3-point tuning) (3-point tuning) (3-point tuning) (3-point tuning) ...

[Page 49] Kenwood TK-380

TK-380 49 Common Section Item Condition Measurement Adjustment Specifications/ Test equipment Unit Terminal Unit Parts Method Remark 1. Setting 1) BATT terminal voltage:7.5V 2) SSG Standard modulation [Wide] MOD:1kHz, DEV:3kHz [Semi wide] MOD:1kHz, D...

[Page 50] Kenwood TK-380

TK-380 50 ADJUSTMENT Item Condition Measurement Adjustment Specifications/ Test equipment Unit Terminal Unit Parts Method Remark Transmitter Section [Panel Tuning Mode except when Panel TEST Mode is specified.] 7. DQT Balance 1) Adj item [n BAL] Powe...

[Page 51] Kenwood TK-380

TK-380 51 ADJUSTMENT Item Condition Measurement Adjustment Specifications/ Test equipment Unit Terminal Unit Parts Method Remark Transmitter Section [Panel Tuning Mode except when Panel TEST Mode is specified.] 11.DQT 1) Adj item [n DQT] Power meter ...

[Page 52] Kenwood TK-380

TK-380 52 Transmitter Section [Panel Tuning Mode except when Panel TEST Mode is specified.] Item Condition Measurement Adjustment Specifications/ Test equipment Unit Terminal Unit Parts Method Remark 15.BATT 1) Adj item [BATT] Power meter Panel ANT P...

[Page 53] Kenwood TK-380

TK-380 53 ADJUSTMENT Receiver Section [Panel Tuning Mode except when Panel TEST Mode is specified.] Item Condition Measurement Adjustment Specifications/ Test equipment Unit Terminal Unit Parts Method Remark 1. Sensitivity 1) Adj item [SENS] Tracking...

[Page 54] Kenwood TK-380

TK-380 54 ADJUSTMENT Item Condition Measurement Adjustment Specifications/ Test equipment Unit Terminal Unit Parts Method Remark 2. Sensitivity [Panel Test Mode] SSG Panel ANT Check 1) CH-Sig:1-1 AF VTVM Universal Check 12dB SINAD or SSG OUT Oscillos...

[Page 55] Kenwood TK-380

TK-380 55 Adjustment points TX-RX unit (X57-6200-XX) component side view Item Condition Measurement Adjustment Specifications/ Test equipment Unit Terminal Unit Parts Method Remark ADJUSTMENT 6. Squelch 1) Adj item [n SQLT] SSG Panel ANT Encoder Adju...

[Page 56] Kenwood TK-380

TK-380 56 TERMINAL FUNCTION CN1 1 B O Power input after passing through the fuse. 2 B O Power input after passing through the fuse. 3 SB I Power output after power switch. 4 SB I Power output after power switch. 5 5M O 5V. 6 VOL I Volume level input...

[Page 57] Kenwood TK-380

ABCDE FGH I JKLMNOPQRS 1 3 4 5 6 7 8 9 10 11 12 13 14 2 57 58 TK-380 DISPLAY UNIT (X54-3210-12) Component Side View Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 DISPLAY UNIT (X54-3210-12) PC BOARD VIEW S301 MON S302 PTT S303 LAMP ...

[Page 58] Kenwood TK-380

ABCDE FGH I JKLMNOPQRS 1 3 4 5 6 7 8 9 10 11 12 13 14 2 60 59 TK-380 Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 DISPLAY UNIT (X54-3210-12) Foil Side View DISPLAY UNIT (X54-3210-12) PC BOARD VIEW 2SC4617 B C E 2SB1132 B C E 2SB79...

[Page 59] Kenwood TK-380

ABCDE FGH I JKLMNOPQRS 1 3 4 5 6 7 8 9 10 11 12 13 14 2 6261 TK-380 Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 DISPLAY UNIT (X54-3210-12) Component Side + Foil Side View DISPLAY UNIT (X54-3210-12) ● Connect 1 and 4. PC BOARD ...

[Page 60] Kenwood TK-380

ABCDE FGH I JKLMNOPQRS 1 3 4 5 6 7 8 9 10 11 12 13 14 2 64 63 TX-RX UNIT (X57-6200-XX) Component Side View TX-RX UNIT (X57-6200-XX) TK-380 PC BOARD VIEW Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6 R260 R11 D4...

[Page 61] Kenwood TK-380

ABCDE FGH I JKLMNOPQRS 1 3 4 5 6 7 8 9 10 11 12 13 14 2 65 66 TX-RX UNIT (X57-6200-XX) Foil Side View TX-RX UNIT (X57-6200-XX) TK-380 PC BOARD VIEW Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6 DTA144EE DTC114EE...

[Page 62] Kenwood TK-380

ABCDE FGH I JKLMNOPQRS 1 3 4 5 6 7 8 9 10 11 12 13 14 2 Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6 67 TX-RX UNIT (X57-6200-XX) Component Side + Foil Side View ● Connect 1 and 6. TX-RX UNIT (X57-6200-XX) TK...

[Page 63] Kenwood TK-380

A B C D E F G IH J K L M ON P Q SR 1 2 3 4 5 6 7 TK-380SCHEMATIC DIAGRAM Note) • Ref. No. : Parts of pattern 1. SVC MON SCNLO Table on the left indicates the parts used among different serial numbers. ...

[Page 64] Kenwood TK-380

FM IF SYSTEM L39 IC18 Q24 –119.0dBm –124.6dBm –126.4dBm –108.4dBm –112.3dBm –108.9dBm –118.7dBm –99.3dBm 235mVrms 254.7mVrms XF1 C146 Q12 C196 IC4 AF0 5 4 3 41 IC13 IC8 DAC 500mW (BTL) SPIC300 197.2mVrms 476mVrms 147.0mVrms 24.0mVrms ...

[Page 65] Kenwood TK-380

TK-380 77 Circuit Diagram KMC-25 (SPEAKER MICROHONE) Specifications Microphone Impedance ..............................2kΩ Sensitivity ................................-65dB±4.0dB at 1kHz Speaker Impedance ..............................16Ω Input ...

[Page 66] Kenwood TK-380

TK-380 78 General Frequency Range RX, TX.............................................................................. E : 440 to 470MHz ..................................................................................... E3 : 406 to 450MHz Groups ....