Pioneer KEX-M8406ZT/UC Service Manual
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Pioneer KEX-M8406ZT/UC Service Manual

Pioneer KEX-M8406ZT/UC Service Manual

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Service
Manual
AUDIO SYSTEM
HEAD UNIT
VEHICLE
DESTINATION
LEXUS GS430
U.S.A., CANADA
LEXUS GS430
U.S.A., CANADA
LEXUS GS430
U.S.A., CANADA
LEXUS GS430
U.S.A., CANADA
Manufactured for TOYOTA
by PIONEER CORPORATION
GS430
PRODUCED AFTER
TOYOTA PART No.
August 2000
86120-3A521
August 2000
86120-3A521
August 2000
86120-3A750
August 2000
86120-3A750
ORDER NO.
CRT2528
ID No.
PIONEER MODEL No.
P1718
KEX-M8406ZT/UC
P1718
KEX-M8406ZT-91/UC
P1723
KEX-M9406ZT/UC
P1723
KEX-M9406ZT-91/UC
CRT2528
PUB. NO.

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Summary of Contents for Pioneer KEX-M8406ZT/UC

  • Page 1 Service Manual ORDER NO. CRT2528 GS430 AUDIO SYSTEM HEAD UNIT VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No. LEXUS GS430 U.S.A., CANADA August 2000 86120-3A521 P1718 KEX-M8406ZT/UC LEXUS GS430 U.S.A., CANADA August 2000 86120-3A521 P1718 KEX-M8406ZT-91/UC LEXUS GS430 U.S.A., CANADA...

  • Page 2: Table Of Contents

    "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. - These models do not provide the test mode for CD changers. - KEX-M8406ZT/UC and KEX-M9406ZT/UC have adopted AVC-LAN. - Supplementary model is identical to the original except for the addition of following items.

  • Page 3: Safety Information

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 1. SAFETY INFORMATION This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.

  • Page 4: Exploded Views And Parts List

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 2. EXPLODED VIEWS AND PARTS LIST 2.1 EXTERIOR...
  • Page 5 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 NOTE: - Parts marked by “*” are generally unavailable because they are not in our Master Spare Parts List. ∇ mark on the product are used for disassembly. - Screws adjacent to EXTERIOR SECTION PARTS LIST Mark No. Description Part No.
  • Page 6 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 2.2 CASSETTE MECHANISM MODULE...
  • Page 7 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 - CASSETTE MECHANISM MODULE SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BSZ20P040FMC 31 Gear ENV1347 2 Washer CBF1037 32 Collar ENV1508 3 Washer CBF1038 33 Gear ENV1350 4 Washer CBG1003 34 Flywheel ENV1500 5 Deck Unit EWM1027...

  • Page 8: Block Diagram And Schematic Diagram

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM MAIN UNIT FM/AM TUNER UNIT CN201 CF52 CF53 L2 D5 L4 D7 CF51 DIVER FM-L 17 19 9 10 MAIN AM-L PA4024A PA4026A Q201 40 7 43 6 38 36 32 AM RF FMSL AMSL...
  • Page 9 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 MIX AMP UNBAL BAL CN301 IC701 IC702 TUNER-L ANALOG NJM2068MD NJM2068MD SWITCH Q703 IC781 MUTE TC74HC4066AF Q709 MUTE AM-L Q701 Q603 6,12 Q705 IC703 Q360 Q358 MUTE NJM2068MD TUNB ANSW AM NOISE ILL+ Q607 ANCELLER Q205 IC203 Q359 HA12181FP IPPW AVC LAN IC681...

  • Page 10: Main Unit

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 3.2 MAIN UNIT(GUIDE PAGE) Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS LIST”. CN901 Large size FM:-26dBs(400Hz,30%) MAIN UNIT AM:-16dBs(400Hz,30%) SCH diagram FM DIVERSITY Guide page Detailed page AM PNS RBDS DECODER TAPE:- 8dBs C D E...
  • Page 11 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 CN902 LCDBL DRIVE ILL DIRECT SOURCE DRIVE ILL DRIVE ILL 8V REGULATOR ILL DIMMER CONTROL ANALOG SW CONTROL AND BU MUTE AVC LAN MUTE 5V REGULATOR RESET AUDIO 8V REGULATOR BU ACC ILL SENSE AUDIO 4V FM:-13dBs AM:-13dBs UNBAL TAPE:+1dBs ANALOG SWITCH FM:-13dBs...
  • Page 12 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91...
  • Page 13 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91...
  • Page 14 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91...
  • Page 15 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91...
  • Page 16 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 3.3 FM/AM TUNER UNIT FM/AM TUNER UNIT FM FRONT END AM OSC FM OSC AM RF FM,AM FM,AM...
  • Page 17 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 FM,AM FM IF...

  • Page 18: Cassette Mechanism Module

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 3.4 CASSETTE MECHANISM MODULE DECK UNIT CN252 VR302 CCP1280 Q271 33K(B) 2SC4116 R260 R258 C253 390P Rev-L R283 0R0 R275 R256 C254 390P Rev-R NFI(L) MSGV(R) R284 0R0 R403 C405 R033 MAOUT RIN(L) C271 R291 C404 R01 IC251 Fwd-R R282 0R0 R404 1/50...
  • Page 19 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 PCB UNIT M1 MOTOR UNIT (MAIN MOTOR) CN253 EXA1499 LOAD R373 load ESG1004 70µs R375 ESG1004 R277 220K R362 R275 MODE SENSE 405 R033 R404 270K EGN1 EGN1005 CN254 MOTOR UNIT (SUB MOTOR) EGN2 EGN3 VCC2 EXA1382 EGN1006 EGN1006 FWD END REV END SENSE...
  • Page 20 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 3.5 LCD UNIT, KEYBOARD UNIT LCD UNIT 8V100mA...

  • Page 21: Keyboard Unit

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 KEYBOARD UNIT IL901-905,907,909,910,912-915: 8V60mA CN652 CN651...

  • Page 22: Pcb Connection Diagram

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 4. PCB CONNECTION DIAGRAM 4.1 MAIN UNIT MAIN UNIT NOTE FOR PCB DIAGRAMS 1. The parts mounted on this PCB include all necessary parts for several destination. For further information for respective destinations, be sure ANTENNA to check with the schematic diagram.
  • Page 23 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 SIDE A CN251 FRONT CN902 CN901...
  • Page 24 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 MAIN UNIT...
  • Page 25 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 SIDE B...
  • Page 26 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 4.2 FM/AM TUNER UNIT SIDE A...
  • Page 27 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 SIDE B...
  • Page 28 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 4.3 CASSETTE MACHANISM MODULE SIDE A DECK UNIT IC,Q ADJ C351 C401 C352 VR302 CN254 C354 VR302 Q271 Q271 R351 R355 C403 C404 R291 C402 CN253 R262 R275 R403 R256 R284 CN252 IC351 R274 IC351 R282 R273 R281 IC251 IC251 R272 R283...
  • Page 29 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 PCB UNIT SIDE A LOAD SW 70µs SW MODE SENSE EGN1 PCB UNIT SIDE B 6 5 4 3 2 1 CN253 MOTOR UNIT (MAIN MOTOR) REEL UNIT...
  • Page 30 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 4.4 KEYBOARD UNIT SIDE A...
  • Page 31 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 SIDE B...
  • Page 32 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 4.5 LCD UNIT SIDE A...
  • Page 33 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 SIDE B...

  • Page 34: Electrical Parts List

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 5. ELECTRICAL PARTS LIST NOTE: - Parts whose parts numbers are omitted are subject to being not supplied. - The part numbers shown below indicate chip components. Chip Resistor RS1/_S___J,RS1/__S___J Chip Capacitor (except for CQS..) CKS.., CCS.., CSZS..=====Circuit Symbol and No.===Part Name Part No.
  • Page 35 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/16S223J CEAL3R3M50 RS1/16S393J CKSYB474K16 RS1/16S104J CEAL220M6R3 RS1/16S0R0J CKSQYB104K16 RS1/16S242J CKSQYB104K16 RS1/16S473J CEAL3R3M50 RS1/16S103J CKSRYB102K50 RS1/16S104J CCSRCH100D50 RS1/16S104J CKSRYB103K25 RS1/16S103J CCSRCH100D50 RS1/16S202J CKSRYB332K50...
  • Page 36 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Transistor DTC144TK Diode MA152WK Transistor 2SD2318F5 Diode UDZ20(B) Transistor 2SB1185 Diode HZU8R2(B3) Transistor IMX1 Diode UDZS8R2(B) Transistor DTB123EK Diode MA153 Transistor DTB123EK...
  • Page 37 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S225J RS1/10S102J RS1/10S225J RS1/10S102J RS1/10S225J RS1/10S104J RS1/10S103J RS1/10S562J RS1/10S102J RS1/10S104J RS1/10S103J RS1/10S333J RS1/10S103J RS1/10S681J RS1/10S104J RS1/10S222J RS1/10S473J RS1/10S102J RS1/10S473J RS1/10S562J RS1/10S224J RS1/10S684J...
  • Page 38 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S822J RS1/10S0R0J RS1/10S822J RS1/10S392J RS1/10S822J RS1/10S392J RS1/10S103J RS1/10S224J RS1/10S102J RS1/10S224J RS1/10S102J RS1/10S224J RS1/10S102J RS1/10S222J RS1/8S222J RS1/10S222J RS1/8S472J RS1/10S822J RS1/10S104J RS1/10S102J RS1/10S102J RS1/10S102J...
  • Page 39 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CKSQYB103K50 CKSQYB334K16 CKSQYB472K50 CKSQYB473K50 CKSQYB392K50 CKSQYB473K50 CKSQYB103K50 CKSQYB473K50 CKSQYB103K50 CKSQYB222K50 CEJA100M16 2200µF/16V CCH1186 CKSQYB473K50 CKSQYB473K50 CEJA2R2M50 CEAL1R0M50 CKSQYB102K50 CEAL1R0M50 CKSQYB103K50 CKSQYB102K50 CKSQYB473K50...
  • Page 40 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- 2.2µF/50V CCH1375 Unit Number : CWM7101 2.2µF/50V CCH1375 Unit Name : Keyboard Unit CKSQYB223K50 CKSQYB223K50 MISCELLANEOUS CKSQYB223K50 Encoder CSD1055 CKSQYB153K50 Encoder CSD1057...
  • Page 41 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/16S104J Unit Number : RS1/8S0R0J Unit Name : PCB Unit RS1/8S0R0J RS1/8S0R0J Inductor ETH0002 RS1/8S0R0J Switch (LOAD) ESG1004 Switch (70µs) ESG1004 RS1/16S0R0J Photo-Interrupter...

  • Page 42: Adjustment

    KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91 6. ADJUSTMENT 6.1 TUNER/AUDIO ADJUSTMENT Connection Diagram KEX-M8406ZT/UC KEX-M9406ZT/UC GGD1236 DSP AMP GM-8506ZT/E GM-8606ZT/E GGD1167 GGD1144 CD Changer GGD1148 CDX-M8076ZT/E CDX-M8106ZT/E...
  • Page 43 KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91 BACK UP +13.2V DC Regulated Power Supply Lch + 4Ω Lch - mV Meter (1) Oscilloscope (1) GM-8506ZT/E Rch + 4Ω Rch - Dummy Antenna Antenna Plug 50Ω(37.5Ω) Stereo FM SSG Modulator 50Ω(75Ω) Main MAIN UNIT Antenna Jack R287 Extention Cord GGD1121 VR202...
  • Page 44 KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91 FM ADJUSTMENT Modulation M:MONO MOD., 400Hz 30%(22.5kHz Dev.) or 400Hz 100%(75kHz Dev.) S1:STEREO MOD., 1kHz, L or R=30%(20.25kHz+7.5kHz Dev.) S2:STEREO MOD., 1kHz, L or R=60%(40.5kHz+7.5kHz Dev.) NOTE:Before proceeding to further adjustments after switching power ON, let the tuner run for ten minutes to allow the circuits to stabilize.
  • Page 45 KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91 AM NOISE CANCELER ADJUSTMENT Connection: Output KEX-M8406ZT KEX-M8406ZT/UC 2-signal pad AM dummy Noise meter KEX-M9406ZT/UC KEX-M9406ZT Pulse generator (equivalent to HP8011A) Setting of the pulse generator (setting of superimposed pulse) Pulse width :50usec 4Vp-p(EMF) Pulse intervals :5msec...

  • Page 46: General Information

    KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91 7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 DIAGNOSIS MODE...
  • Page 47 KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91...
  • Page 48 KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91...
  • Page 49 KEX-M8406ZT ,M8406ZT-91,M9406ZT ,M9406ZT-91...

  • Page 50: Disassembly

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 7.1.2 DISASSEMBLY Removing the Case (not shown) 1. Remove the six screws. 2. Remove the case. Removing the Grille Assy (Fig.1) Holder Remove the two screws and then remove the Grille Assy. Removing the Holder (Fig.1) Remove the four screws and then remove the Holder.

  • Page 51: Connector Function Description

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 7.1.3 CONNECTOR FUNCTION DESCRIPTION SUB ANTENNA MAIN ANTENNA MUTE SGND MUTE ILL+ TX2+ TX2- ILL-...

  • Page 52: Troubleshooting

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 7.1.4 TROUBLESHOOTING Check +B Is B-UP ON? BSENS terminal (Check a power supply.) Pin 75(IC601) Turn on ACC Is ACC ON? ASENS terminal (Check a power supply.) Pin 73(IC601) Check illumination circuit? Does illumination come on? ILSENS terminal Pin 23(IC601) DSSILL terminal Pin 51(IC601) Is PWR-ON enabled? Check PWRSW terminal...

  • Page 53: Parts

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 7.2 PARTS 7.2.1 IC - Pin Functions (PD5579A) Pin No. Pin Name Function and Operation MUTESENS Not used linh Inhibit output for LCD driver Chip enable output pin for LCD driver Not used LCD driver data output Not used Clock output for LCD driver BYTE Connect to GND...
  • Page 54 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 Pin No. Pin Name Function and Operation Power supply Not used Connect to GND 65-68 KD3-0 Key data input Cassette mechanism MS sense input Head forward/reverse select output PLAY MS gain select output Cassette mechanism tape detect input asens ACC power sense input csej Cassette eject sense input...
  • Page 55 KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 - Pin Functions (LC75874W) Pin No. Pin Name Function and Operation 1–64 SE3-66 LCD segment signal output 65–68 CO1-CO4 LCD common signal output Power supply VLCD LCD Power supply VLCD1 LCD bias power supply VLCD2 LCD bias power supply linh Inhibit input from IC901 Chip enable output pin for LCD driver...

  • Page 56: Display

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 7.2.2 DISPLAY...

  • Page 57: Explanation

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 7.3 EXPLANATION 7.3.1 SYSTEM BLOCK DIAGRAM POWER SUPPLY(+B, ACC) - (7SP) SIGNAL(SOUND, VISION) +B,ACC GM-8506ZT/E GM-8606ZT/E +B, ACC KEX-M8406ZT/UC VEHICLE +B, ACC CDX-M8076ZT/E CDX-M8176ZT/E - (8SP) +B,ACC Other Makers +B, ACC KEX-M9406ZT/UC VEHICLE +B, ACC CDX-M8076ZT/E CDX-M8176ZT/E...

  • Page 58: Operational Flow Chart

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 7.3.2 OPERATIONAL FLOW CHART Power ON VDD=5V 62pin VCC=5V 16pin bsens 75pin asens 73pin swvdd←L 45pin PPW←H 22pin Source keys operative Source ON SYSPW←L 52pin Completes power-on operation. (After that, proceed to each source operation.)

  • Page 59: Operations And Specifications

    KEX-M8406ZT,M8406ZT-91,M9406ZT,M9406ZT-91 8. OPERATIONS AND SPECIFICATIONS 8.1 OPERATIONS - RADIO RADIO TEXT PRESET RECALL PRESET CH.MEMORY SCAN VOLUME, MANUAL POWER ON/OFF SEEK TUNING RDS ON/OFF TRAFFIC SEEK INFORMATION DOWN PTY IND. FAST BLANK - TAPE FORWARD DOLBY NR SKIP MUSIC REWIND DIRECTION CHANGE REPEAT BALANCE...

  • Page 60: Specifications

    PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936 C PIONEER CORPORATION 2000 K-ZZS. JULY 2000 Printed in Japan...

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