Kenwood GX-401EF2 Service Manual
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Kenwood GX-401EF2 Service Manual

Cd cassette receiver
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CD CASSETTE RECEIVER
GX-401EF2
SERVICE MANUAL
SUBARU GENUINE
Front glass
(B10-4256-03)
DISP
LOCAL
SCAN
AS
MUTE
TUNE/
TRACK
Knob (SEEK)
(K23-1065-04)
Cord with plug
(E30-6075-05)
Cassette lid
(A53-1703-03)
LOUD
1
2
3
BNR
REP
RDM
Knob (CS EJ)
(K24-3876-04)
Knob (1,3,5)
(K25-1462-03)
Holder
(J19-5161-05) x 2
Blind plate
(F19-1357-04)
NEWS
DOLBY B NR
TONE/
T/B
BAL
4
5
PROG
Knob (NEWS)
Knob (2,4,6)
(K25-1463-03)
(K24-3877-04)
Knob (T/B)
(K24-3878-04)
© 2002-9 PRINTED IN JAPAN
B51-7966-00 ( N ) 1889
Panel assy
(A64-2724-02)
VOL ADJ
T.I
COMPACT
C D
DIGITAL AUDIO
BAND
TAPE
REG
PUSH
POWER
VOLUME
BRIGHT
Knob (VOL)
(K23-1066-04)

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Summary of Contents for Kenwood GX-401EF2

  • Page 1 CD CASSETTE RECEIVER GX-401EF2 SERVICE MANUAL © 2002-9 PRINTED IN JAPAN B51-7966-00 ( N ) 1889 SUBARU GENUINE Front glass Cassette lid Blind plate Panel assy (F19-1357-04) (B10-4256-03) (A53-1703-03) (A64-2724-02) VOL ADJ COMPACT DISP LOCAL DIGITAL AUDIO SCAN BAND MUTE...

  • Page 2: Block Diagram

    GX-401EF2 BLOCK DIAGRAM ANT. CD-CH (X14) IC22 IC41 IC31,32 TUNER POWER FIX-EQ SP-OUT PACK E-VOL P-ANT P-ANT IC21 Q709 BU-DET SW-AMP MUTE Q904 IC13 ACC-DET IC84 TEL-MUTE IC82 Q706 MEMORY RESET BU5V AVR IC81 Q708 MECHA PON5V SW Q101 FM+B...

  • Page 3: Components Description

    GX-401EF2 COMPONENTS DESCRIPTION Synthesizer Unit (X14-6212-71) Ref.No Application / Function Operation / Condition Dolby B / Tape EQ amplifier Playback EQ / Dolby B / between music detection Motor driver For cassette mechanism IC12 Ope-amplifier RDS noise amplifier IC13 RDS decoder...

  • Page 4: Microcomputer's Terminal Description

    GX-401EF2 COMPONENTS DESCRIPTION Ref.No Application / Function Operation / Condition Q706 AVR for microcomputer 5.6V AVR Q707 AVR control for microcomputer 5.6V AVR Q708 Switch for P-ON 5V Switch for P-ON 5V Q709 BU detection Output “Lo” when BU ON...
  • Page 5 GX-401EF2 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin name Description / Processing Operation CD_MUTE_R MUTE request from CD mechanism. “L” : Mute on request Not used (N.C.) Not used (N.C.) REF_CONT Voltage control of Avref. “H” : Active CH_REQH Communication reqest to CH.
  • Page 6 GX-401EF2 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin name Description / Processing Operation MODE3 Cassette mechanism positioning mode pluse input. FF/REW/FWD/REV detection AVSS GND for A/D. SC_CON Panel microcomputer operation control output. SC_BUSY Panel BUSY input. AVREF1 D/A reference voltage input. CH_DATAC Data input from changer.
  • Page 7 GX-401EF2 MICROCOMPUTER’S TERMINAL DESCRIPTION Panel Microprocessor : UPD780021AGC-106-8BS (X25 : IC1) Pin Name Description / Processing Operation KS0~KS3 Key scan signal output 0~3 VFD_BLK VFD driver blank output Not used (OPEN) Positive power supply 11~14 Not used (OPEN) VFD_LAT VFD SIO latch...

  • Page 8: Disassembly For Repair

    GX-401EF2 DISASSEMBLY FOR REPAIR How to Remove the Holder Plugging the minus small size screwdriver to the holder Top plate toward it causes it toward Heat sink Set up the screw point Holder (J19-5161-05) Heat sink Holder Antenna cord Rear side...

  • Page 9: Cd Player Unit

    PC BOARD (COMPONENT SIDE VIEW) PC BOARD (FOIL SIDE VIEW) CD PLAYER UNIT CD PLAYER UNIT X32-5240-01 (J74-1249-02) X32-5240-01 (J74-1249-02) FBAL GCTL TBAL VDET R218 Vref R202 TRCRS C26 R36 BU 5V D GND D OUT 12EJE SLED-/EJECT /CLK DATA SLED+/LOAD 8EJE R214...

  • Page 10: Synthesizer Unit

    PC BOARD (COMPONENT SIDE VIEW) SYNTHESIZER UNIT X14-6212-71 (J74-1380-12) Q706 Q701 IC41 SYNTHESIZER UNIT R702 R419 (X14-6212-71) C718 C707 C419 Ref. No. Address D710 C409 13 11 7 C703 C410 10 6 C708 R725 C711 CN82 IC71 C712 R508 D706 D705 C722 D501...
  • Page 11 PC BOARD (FOIL SIDE VIEW) SYNTHESIZER UNIT X14-6212-71 IC41 Q701 Q706 (J74-1380-12) R416 SYNTHESIZER UNIT Q702 R415 (X14-6212-71) C707 C718 C415 R724 Ref. No. C410 Address R735 R716 C409 R733 D710 C417 Q710 R417 R732 C703 Q705 C719 Q703 R701 Q707 R730 C711...

  • Page 12: Switch Unit

    PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT SWITCH UNIT X25-9382-70 A/2 (J74-1381-12) X25-9382-70 A/2 (J74-1381-12) X25 B/2 X25 B/2 SWITCH UNIT (X25-9382-70) Ref. No. Address Refer to the schematic diagram for the values of resistors and ca- pacitors.
  • Page 13 (X32-5240-0X) BU5V BU5V TRCRS 1000P 0.015 KICK TVD TRV TOFS PLLF RFDET 1.8V CSEL IREF TEST1 1.4V 4.8V 0.1V TEST2 2.5V IOSEL DSLF 5.0V 2.5V 5.0V NRST DPU1 (X92-) BCLK IOP- 0V or 5.0V LRCK S2 : 0.8Vp-p 2.5V OPTICAL 12cm DISC SRDATA VREF...
  • Page 14 2SB1565 UMC2N DC IN/SP OUT PHONE (X14-6212-71) R419 R421 HA12216F R506 2.2K REQ C BA6285FP IC12 NJM4565M-TE2 R509 IC13 TDA7479D DTC114EK IC21 BA3129F D503 NJM4565M-TE2 IC22 TDA7400D DTC114YUA IC41 IC84 NJM2060M IC31,32 R507 DTC343TK IC41 : AN7550NZ POWER 5.0V DATA C 2.2K IC71 M5237ML...
  • Page 15 3.7V 2.2K 4.0V 5.0V 4.0V MAOUT 4.0V LAMP 0.039 RIN(L) 4.0V MSGV(R) Q608 5.0V 33u10 NFI(L) R609 D602 4.0V IC82 RESET R21 18K 0.012 R23 16K R25 430K 11 12 14 15 19 20 CN81 PB. LEVEL X25- GX-401EF2 (1/2)
  • Page 16 SC BUSY 5.0V 5.0V AVDD AVSS 0V/5.0V ENC UP 4.2V VFD ON ENC DOWN 12MHz 4.2V 5.0V 0V/5.0V 100K 8.388MHz GX-401EF2 (2/2) CD EJ POWER 780021AGC-106 DTC114EK or UN2211 DISP NEWS UMC2N DTC114YUA or UN5214 D1,2 1SR154-400 B30-1417-05 TONE BAND...
  • Page 17 GX-401EF2 EXPLODED VIEW (CASSETTE MECHANISM) M2x2.5 (BLK) : N09-4324-08 FLAT WASHER : N19-2136-08 M2x13 : N09-4325-08 M2x3 (BLK) : N09-4326-08 M2x3 : N09-4058-08 FLAT WASHER : N19-2038-08 FLAT WASHER : N19-2136-08 FLAT WASHER : N19-2137-08 FLAT WASHER : N19-2138-08 SCREW...

  • Page 18: Exploded View (Unit)

    GX-401EF2 EXPLODED VIEW (UNIT) M2.6x3.5 (BLK) : N09-1492-05 M3x4 : N30-3004-46 M3x6 (BLK) : N30-3006-45 M3x8 (BLK) : N35-3008-45 : N80-2006-46 2x8 (BLK) : N80-2008-45 M3x6 (BLK) : N83-3006-45 : N83-3006-46 : N89-3008-46 219 219 (X14) (X14) (X25-) (X14) (X14)
  • Page 19 GX-401EF2 EXPLODED VIEW (MECHANISM ASSY) 402 437 DPU1 DFPC1 (X32-524) φ 2x8 : N09-4460-05 M1.7x8.5 : N09-4472-05 M1.7x2.5 : N09-6004-05 φ 2x3.5 : N09-6006-05 M2x2 : N09-6007-05 φ 2x6(BLK) : N09-6051-05 1.6 WASHER : N19-2163-04 M2x2 : N39-2020-46 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 20: Parts List

    GX-401EF2 PARTS LIST New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No. Description Ref. No.
  • Page 21 GX-401EF2 PARTS LIST New parts Par ts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. SYNTHESIZER UNIT (X14-6212-71) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No.
  • Page 22 GX-401EF2 PARTS LIST New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. SYNTHESIZER UNIT (X14-6212-71) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No.
  • Page 23 GX-401EF2 PARTS LIST New parts Par ts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. SYNTHESIZER UNIT (X14-6212-71) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No.
  • Page 24 GX-401EF2 PARTS LIST New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. SYNTHESIZER UNIT (X14-6212-71) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No.
  • Page 25 GX-401EF2 PARTS LIST New parts Par ts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. SWITCH UNIT (X25-9382-70) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No.
  • Page 26 GX-401EF2 PARTS LIST New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. CD PLAYER UNIT (X32-5240-01) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No.
  • Page 27 GX-401EF2 PARTS LIST / SPECIFICATIONS New parts Par ts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. FM Section Teile ohne Parts No. werden nicht geliefert. Frequency Range ......87.5MHz~108.0MHz Desti- Ref.

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