Pioneer KEX-M8806ZT/EW Service Manual
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Pioneer KEX-M8806ZT/EW Service Manual

Pioneer KEX-M8806ZT/EW Service Manual

Audio system head unit lexus lx470
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Service
Manual
AUDIO SYSTEM
HEAD UNIT
VEHICLE
DESTINATION
LEXUS LX470
EUROPE
LEXUS LX470
EUROPE
LEXUS LX470
EUROPE
LEXUS LX470
EUROPE
Manufactured for TOYOTA
by PIONEER CORPORATION
LX470
PRODUCED AFTER
TOYOTA PART No.
August 2000
86120-60410
August 2000
86120-60410
August 2000
86120-60400
August 2000
86120-60400
ORDER NO.
CRT2546
ID No.
PIONEER MODEL No.
P3726
KEX-M8806ZT/EW
P3726
KEX-M8806ZT-91/EW
P3727
KEX-M8906ZT/EW
P3727
KEX-M8906ZT-91/EW
CRT2546
PUB. NO.

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Summary of Contents for Pioneer KEX-M8806ZT/EW

  • Page 1 Service Manual ORDER NO. CRT2546 LX470 AUDIO SYSTEM HEAD UNIT VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No. LEXUS LX470 EUROPE August 2000 86120-60410 P3726 KEX-M8806ZT/EW LEXUS LX470 EUROPE August 2000 86120-60410 P3726 KEX-M8806ZT-91/EW LEXUS LX470...

  • 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-M8806ZT/EW and KEX-M8906ZT/EW have adopted AVC-LAN. - Supplementary model is identical to the original except for the addition of following items.

  • Page 3: Safety Information

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 2. EXPLODED VIEWS AND PARTS LIST 2.1 EXTERIOR(KEX-M8806ZT)
  • Page 5 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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(KEX-M8806ZT) Mark No. Description Part No.
  • Page 6 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 2.2 EXTERIOR(KEX-M8906ZT)
  • Page 7 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 EXTERIOR SECTION PARTS LIST(KEX-M8906ZT) Mark No. Description Part No. Mark No. Description Part No. 1 Screw BMZ26P050FMC 26 Lighting Conductor CNV6144 2 Screw BMZ30P050FMC 27 Rubber CNV6145 3 Case CNB2590 28 Lighting Conductor CNV6500 4 Insulator CNM6654 29 Holder CNV6502 5 Cushion CNM6934...
  • Page 8 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 2.3 CASSETTE MECHANISM MODULE...
  • Page 9 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 10: Block Diagram And Schematic Diagram

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 FM-L Q703 17 19 9 10 MUTE PA4024A PA4026A 40 7 43 Q201 6 38 36 32 AM RF FMSL AMSL...
  • Page 11 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 E-VOL CN301 FM-L AM-L IC701 Q703 PML003AM TAPE-L MUTE MUTE Q701 Q753 MUTE CONTROL ILL+ Q205 Q603 Q755 Q756 IPPW AVC LAN IC681 HA12187FP MUTE CONTROL Q358 AMPMUT Q357 CN302 Q302 ASEN Q301 BSEN Q303 95 90 89 ISEN IPPW Q336 AMPMUT...

  • Page 12: Main Unit

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 FM:-26dBs(400Hz,30%) MAIN UNIT AM:-16dBs(400Hz,30%) Large size SCH diagram Guide page Detailed page RBDS DECODER TAPE:- 8dBs CASSETTE C D E MECHANISM MODULE...
  • Page 13 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 ILL 8V REGULATOR ILL DIMMER CONTROL MUTE AMP CONTROL BEEP AVC LAN ANT CONTROL SYSTEM CONTROLLER 5V REGULATOR BU MUTE RESET AUDIO 8V REGULATOR BU ACC ILL SENSE FM:-15dBs AM:-15dBs TAPE:-6dBs AUX :+2.2dBs SYSTEM MUTE...
  • Page 14 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91...
  • Page 15 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91...
  • Page 16 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91...
  • Page 17 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91...
  • Page 18 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 3.3 FM/AM TUNER UNIT FM/AM TUNER UNIT PA4023B...
  • Page 19 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91...

  • Page 20: Cassette Mechanism Module

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 21 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 22 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 3.5 KEYBOARD UNIT(KEX-M8806ZT) KEYBOARD UNIT POWER-VOL CN651...
  • Page 23 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91...
  • Page 24 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 3.6 KEYBOARD UNIT(KEX-M8906ZT) KEYBOARD UNIT POWER-VOL CN651...
  • Page 25 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91...

  • Page 26: Pcb Connection Diagram

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 to check with the schematic diagram.
  • Page 27 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 SIDE A CN251 FRONT CN901...
  • Page 28 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 MAIN UNIT...
  • Page 29 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 SIDE B FRONT...
  • Page 30 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 4.2 FM/AM TUNER UNIT SIDE A...
  • Page 31 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 SIDE B...
  • Page 32 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 33 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 34 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 4.4 KEYBOARD UNIT(KEX-M8806ZT) SIDE A...
  • Page 35 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 SIDE B...
  • Page 36 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 4.5 KEYBOARD UNIT(KEX-M8906ZT) SIDE A...
  • Page 37 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 SIDE B...

  • Page 38: Electrical Parts List

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 39 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/16S0R0J CKSQYB104K16 RS1/16S562J CKSQYB104K16 RS1/16S104J CEAL3R3M50 RS1/16S104J CKSRYB102K50 RS1/16S472J CCSRCH100D50 RS1/16S202J CKSRYB103K25 RS1/16S123J CCSRCH100D50 RS1/16S103J CKSRYB332K50 RS1/16S0R0J CKSQYB473K16 RS1/16S0R0J CKSQYB473K16 RS1/10S153J CKSQYB103K25...
  • Page 40 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Transistor DTC144EK Inductor LCTB2R2K2125 Transistor 2SA1255 Inductor LCTB2R2K2125 Chip Transistor 2SC2712 Coil 350µH CTH1092 Chip Transistor 2SC2712 Inductor LCTB100K3216 Transistor 2SA1162 Inductor...
  • Page 41 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S102J RS1/8S222J RS1/10S102J RS1/8S472J RS1/10S102J RS1/10S104J RS1/10S102J RS1/10S102J RS1/10S104J RS1/10S102J RS1/10S562J RS1/10S102J RS1/10S104J RS1/10S102J RS1/10S333J RS1/10S681J RS1/10S681J RS1/10S102J RS1/10S222J RS1/10S102J RS1/10S102J RS1/10S473J...
  • Page 42 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S182J CKSQYB102K50 RS1/10S182J CKSQYB392K50 RS1/10S273J CKSQYB182K50 RS1/10S273J CKSQYB473K50 RS1/10S0R0J CEJA3R3M50 RS1/10S0R0J CKSQYB333K50 RS1/10S391J CEJANP1R0M50 RS1/10S391J CQMA683J50 RS1/10S391J CQMA333J50 RS1/10S391J CQMA333J50 RS1/10S103J CQMA333J50...
  • Page 43 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CKSQYB103K50 Unit Number : CWM7103(KEX-M8806ZT) CKSQYB103K50 Unit Name : Keyboard Unit CKSQYB102K50 CKSQYB102K50 MISCELLANEOUS CKSQYB102K50 Encoder CSD1045 CKSQYB102K50 Encoder CSD1047 CKSQYB103K50 Lamp 8V 60mA...
  • Page 44 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/16S133J Unit Number : RS1/16S274J Unit Name : PCB Unit RS1/16S274J RS1/16S183J Inductor ETH0002 RS1/8S0R0J Switch (LOAD) ESG1004 Switch (70µs) ESG1004 RS1/8S0R0J Photo-Interrupter...

  • Page 45: Adjustment

    KEX-M8806ZT ,M8806ZT-91,M8906ZT ,M8906ZT-91 6. ADJUSTMENT 6.1 TUNER/AUDIO ADJUSTMENT Connection Diagram KEX-M8806ZT/EW (LHD) KEX-M8906ZT/EW (RHD) GGD1242 BULLET CONNECTOR BULLET CONNECTOR GGD1169 (Made by NIPPON DENSO) (Made by MATSUSHITA) GGD1239 BULLET CONNECTOR...
  • Page 46 KEX-M8806ZT ,M8806ZT-91,M8906ZT ,M8906ZT-91 BACK UP +13.2V DC Regulated Power Supply Lch + 4Ω Lch - mV Meter (1) Oscilloscope (1) AMPLIFIER Rch + 4Ω Rch - Dummy Antenna Antenna Plug 50Ω(37.5Ω) Stereo FM SSG Modulator 50Ω(75Ω) Antenna Jack MAIN UNIT Extention Cord GGD1121 R287 VR202...
  • Page 47 KEX-M8806ZT ,M8806ZT-91,M8906ZT ,M8906ZT-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 48 KEX-M8806ZT ,M8806ZT-91,M8906ZT ,M8906ZT-91 AM NOISE CANCELER ADJUSTMENT Connection: Output KEX-M8406ZT KEX-M8806ZT/EW 2-signal pad AM dummy Noise meter KEX-M8906ZT/EW 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 49: General Information

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 DISASSEMBLY Removing the Case (not shown) 1. Remove the case. Removing the Grille Assy (Fig.1) Cassette Mechanism Module Remove the two screws and then remove the Grille Assy. Removing the Cassette Mechanism Module (Fig.1) Remove the four screws and then remove the Cassette Mechanism Module.

  • Page 50: Connector Function Description

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 7.1.2 CONNECTOR FUNCTION DESCRIPTION ANTENNA MUTE SGND CDL+ CDR+ MUTE ILL+ TX2+ TX2- CDL- CDR- ILL- BEEP SGND...

  • Page 51: Troubleshooting

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 7.1.3 TROUBLESHOOTING Is B-UP ON? Check +B (Check a power supply.) BSENS terminal Pin 75(IC601) Is ACC ON? Turn on ACC (Check a power supply.) ASENS terminal Pin 73(IC601) Check illumination circuit? Does illumination come on? ILSENS terminal Pin 23(IC601) DSSILL terminal Pin 51(IC601) Check PWRSW terminal Is PWR-ON enabled?
  • Page 52 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 7.2 IC - Pin Functions (PD5581A) Pin No. Pin Name Function and Operation Not used currq Current request E-VOL driver data output Not used E-VOL driver data clock Not used E-VOL driver strobe output BYTE Connect to GND CNVSS Connect to GND XCIN Not used...
  • Page 53 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 Pin No. Pin Name Function and Operation 59-61 KST2-0 Key strobe output 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...
  • Page 54 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 HA12216F NFI(L) MSGV(R) Dolby B-N RIN(L) MAOUT FIN(L) MSDET MSOUT FIN(R) MSGV VREF RIN(R) 120/70 Dolby B-N NFI(R)

  • Page 55: Explanation

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 7.3 EXPLANATION 7.3.1 SYSTEM BLOCK DIAGRAM POWER SUPPLY(+B, ACC) SIGNAL(SOUND, VISION) (OTHER MAKERS) NAVIGATION DISPLAY (OTHER MAKERS) CD CHANGER KEX-M8806ZT/EW KEX-M8906ZT/EW CDX-M8106ZT/WL (OTHER MAKERS) +B, ACC...

  • Page 56: Operational Flow Chart

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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 57: Operations And Specifications

    KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 8. OPERATIONS AND SPECIFICATIONS 8.1 OPERATIONS - RADIO(KEX-M8806ZT) TRAFFIC INFORMATION DOWN UP TUNING, MANUAL SEEK SEEK POWER ON/OFF VOLUME - RADIO(KEX-M8906ZT) TRAFFIC INFORMATION TUNING, DOWN MANUAL SEEK SEEK POWER ON/OFF VOLUME...
  • Page 58 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 - TAPE(KEX-M8806ZT) EJECT DOWN UP TAPE DIRECTION CHANGE AUTO PROGRAM POWER ON/OFF SEARCH VOLUME - TAPE(KEX-M8906ZT) EJECT DOWN TAPE DIRECTION CHANGE AUTO PROGRAM SEARCH POWER ON/OFF VOLUME...
  • Page 59 KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91 - CD, MD(KEX-M8806ZT) DOWN UP DOWN UP CD, MD TRACK SELECT DISC SELECT POWER ON/OFF VOLUME - CD, MD(KEX-M8906ZT) DOWN DOWN CD, MD DISC SELECT TRACK SELECT POWER ON/OFF VOLUME...

  • 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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