Pioneer GX470 Service Manual
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Pioneer GX470 Service Manual

Pioneer GX470 Service Manual

Audio system head unit
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AUDIO SYSTEM
HEAD UNIT
VEHICLE
DESTINATION
LEXUS GX470
U.S.A., CANADA
LEXUS GX470
U.S.A., CANADA
Manufactured for TOYOTA
by PIONEER CORPORATION
GX470
PRODUCED
TOYOTA PARTS No.
AFTER
November 2002
86120-60440
November 2002
86120-60470
ORDER NO.
CRT2916
PIONEER MODEL
ID No.
No.
P1731
KEX-M8727ZT/UC
KEX-M8727ZT-91/UC
P1732
KEX-M8527ZT/UC
KEX-M8527ZT-91/UC
CRT2916
PUB.NO.

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Summary of Contents for Pioneer GX470

  • Page 1 ORDER NO. CRT2916 GX470 AUDIO SYSTEM HEAD UNIT PRODUCED PIONEER MODEL VEHICLE DESTINATION TOYOTA PARTS No. ID No. AFTER LEXUS GX470 U.S.A., CANADA November 2002 86120-60440 P1731 KEX-M8727ZT/UC KEX-M8727ZT-91/UC LEXUS GX470 U.S.A., CANADA November 2002 86120-60470 P1732 KEX-M8527ZT/UC KEX-M8527ZT-91/UC Manufactured for TOYOTA CRT2916 PUB.NO.

  • Page 2: Block Diagram And Schematic Diagram

    3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM MAIN UNIT FM/AM TUNER UNIT FM/AM 1ST IF 10.7MHz MPXREF 41kHz AMRF T51 Q51 CF51 CF52 CF53 TUNER MIXING AMDET CN501 AMANT L ch IC401 IC 2 FM MPX NJM2068M Q406 MAIN ANT ADJ COMP...
  • Page 3 AUDIO SELECT UNBALANCE TO BALANCE FOR AMP TUNER MIXING AMP CN801 AUD+B SYSTEM MUTE IC401 Q204 Q205 IC202 IC203 IC204 NJM2068MD TC4052BF NJM2068MD NJM2068MD LANL Q406 AUDIO SELECT FOR RSA UNBALANCE TO BALANCE SYSTEM MUTE Q304 Q305 IC303 IC304 IC302 IC252 NJM2068MD NJM2068MD...

  • Page 4: Overall Connection Diagram(Guide Page)

    3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or "ELECTRICAL PARTS LIST". Large size SCH diagram FM:-24.0dBs(30%,400Hz) AM:-11.7dBs(30%,400Hz) TUNER Guide page Detailed page FM DIVERSITY RBDS DECODER CN251 TAPE:-7.5dBs(0dB,1kHz) CN901...
  • Page 5 BALANCE TO UNBALANCE MAIN UNIT R417,418 KEX-M8727ZT KEX-M8527ZT TUNER MIXING AMP SYSTEM MUTE AUDIO SELECTOR FOR AMP FM:-14.4dBs AM:-14.8dBs (KEX-M8727ZT) (AMP) AM:-11.5dBs (KEX-M8527ZT) UNBALANCE TO BALANCE TAPE: -7.5dBs UNBALANCE TO BALANCE AUDIO SELECTOR FOR RSA/RSE SYSTEM MUTE FM:-14.4dBs AM:-14.8dBs (KEX-M8727ZT) AM:-11.5dBs (KEX-M8527ZT) TAPE: -7.5dBs...
  • Page 6 KEX-M8727ZT/UC...
  • Page 7 KEX-M8727ZT/UC...
  • Page 8 KEX-M8727ZT/UC...
  • Page 9 KEX-M8727ZT/UC...

  • Page 10: Keyboard Unit

    3.3 KEYBOARD UNIT PWR•VOL CN804 KEX-M8727ZT/UC...
  • Page 11 KEYBOARD UNIT KEX-M8727ZT/UC...

  • Page 12: Cassette Mechanism Module

    3.4 CASSETTE MECHANISM MODULE DECK UNIT CN252 VR302 CCP1280 Q271 33K(B) 2SC4116 R260 R258 C253 390P Rev-L R283 0R0 R256 C254 390P Rev-R NFI(L) MSGV(R) R284 0R0 R403 MAOUT RIN(L) C271 R291 C404 R01 IC251 Fwd-R R282 0R0 1/50 MSDET FIN(L) C252 390P HA12216F...

  • Page 13: Sensor Unit

    M1 MOTOR UNIT (MAIN MOTOR) EXA1618 CN255 Q101 CN256 EGN1004 CN253 L102 L101 Q271 2SC4116 R277 R375 70µs S103 220K MODE S102 R373 load LOAD S101 R275 ESG1007x3 C405 R033 SENSOR UNIT R404 270K CN254 MOTOR UNIT (SUB MOTOR) VCC2 EXA1623 R374 MECHANISM...

  • Page 14: Connection Diagram

    6. ADJUSTMENT 6.1 CONNECTION DIAGRAM 1. RSE (option) system KEX-M8727ZT/UC EMV(DENSO) GGD1305 GGD1239 Bullet connector Bullet connector (To DC Regulated Power Supply) (To DC Regulated Power Supply) Bullet connector (To DC Regulated Power Supply) AMP(M/L) NAVI ECU(DENSO) GGD1169 GGD1240 AUI+ AUI- Bullet connector SP Line...
  • Page 15 2. RSA (option) system KEX-M8727ZT/UC EMV(DENSO) GGD1302 GGD1239 Bullet connector (To DC Regulated Power Supply) AMP(M/L) Bullet connector (To DC Regulated Power Supply) Bullet connector (To DC Regulated Power Supply) NAVI ECU(DENSO) GGD1240 Bullet connector GGD1169 SP Line AUI- AUI+ RSA Controller CDX-M8027ZT/E *Please connect only one Multi CD at the same time...
  • Page 16 3. Standard system KEX-M8727ZT/UC EMV(DENSO) GGD1304 GGD1300 GGD1239 Bullet connector (To DC Regulated Power Supply) AMP(M/L) Bullet connector (To DC Regulated Power Supply) Bullet connector (To DC Regulated Power Supply) NAVI ECU(DENSO) GGD1240 GGD1169 Bullet connector SP Line AUI- AUI+ Bullet connector (To DC Regulated Power Supply) CDX-M8027ZT/E...
  • Page 17 4. RSE (option) system KEX-M8527ZT/UC EMV(DENSO) GGD1305 GGD1239 Bullet connector Bullet connector (To DC Regulated Power Supply) (To DC Regulated Power Supply) GM-8027ZT/E Bullet connector (To DC Regulated Power Supply) NAVI ECU(DENSO) GGD1169 GGD1240 AUI+ AUI- Bullet connector SP Line GGD1306 SDVD(PANA) RSE-ECU...
  • Page 18 5. RSA (option) system KEX-M8527ZT/UC EMV(DENSO) GGD1302 GGD1239 Bullet connector (To DC Regulated Power Supply) GM-8027ZT/E Bullet connector (To DC Regulated Power Supply) Bullet connector (To DC Regulated Power Supply) NAVI ECU(DENSO) GGD1240 Bullet connector GGD1169 SP Line AUI- AUI+ RSA Controller CDX-M8027ZT/E *Please connect only one Multi CD at the same time...
  • Page 19 6. Standard system KEX-M8527ZT/UC EMV(DENSO) GGD1304 GGD1300 GGD1239 Bullet connector (To DC Regulated Power Supply) GM-8027ZT/E Bullet connector (To DC Regulated Power Supply) Bullet connector (To DC Regulated Power Supply) NAVI ECU(DENSO) GGD1240 Bullet connector GGD1169 SP Line AUI- AUI+ Bullet connector (To DC Regulated Power Supply) CDX-M8027ZT/E...
  • Page 20 6.2 TUNER/AUDIO ADJUSTMENT Extention Cord GGD1121 MAIN UNIT CN353 DECK UNIT VR302 VR301 Pin2 Pin3 CN251 L-CH R-CH Meter DOLBY B NR ADJUSTMENT Test Tape Adjustment Point Adjustment Method (Switch Position) NCT-150 VR301(Lch),VR302(Rch) mV Meter : –8.24dBs(300mV)±1dB (400Hz,200nwb/m) (DOLBY NR Switch : OFF) KEX-M8727ZT/UC...
  • Page 21 AM NOISE CANCELER ADJUSTMENT Connection: Output KEX-M8727ZT/UC 2-signal pad AM dummy Noise meter KEX-M8527ZT/UC Pulse generator (equivalent to HP8011A) Setting of the pulse generator (setting of superimposed pulse) Pulse width :50usec 4Vp-p(EMF) Pulse intervals :5msec 50us Pulse voltage :4Vp-p Adjustment: 1.

  • Page 22: Self-Diagnostic Function

    6.3 SELF-DIAGNOSTIC FUNCTION KEX-M8727ZT/UC...
  • Page 23 KEX-M8727ZT/UC...
  • Page 24 KEX-M8727ZT/UC...

  • Page 25: General Information

    7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 DISASSEMBLY Removing the Upper Case (not shown) 1. Remove the Upper Case. Removing the Cassette Mechanism Module (Fig.1) Cassette Mechanism Module Remove the four screws and then remove the Cassette Mechanism Module. Removing the Grille Assy (Fig.1) Remove the two screws and then remove the Grille Assy.

  • Page 26: Connector Function Description

    7.1.2 CONNECTOR FUNCTION DESCRIPTION STSW2 STSW1 SWGND (SGND) L+ R+ MUTE TX+ NC (AMP+) ILL+ BU MUTE L- R+ SGND GND L- NC NC TX- ILL- RMUTE RSA L- RSA L+ RSA R- RSA R+ SGND (BU) (ACC) (GND) KEX-M8727ZT/UC...

  • Page 27: Troubleshooting

    7.1.3 TROUBLESHOOTING Is B-UP ON? Check +B (Check a power supply.) BSENS terminal Pin 75(IC601) Turn on ACC Is ACC ON? ASENS terminal (Check a power supply.) Pin 73(IC601) Does illumination Check illumination circuit? come on? ISENS terminal Pin 2(IC601) Check PWRSW terminal Is PWR-ON enabled? power Pin 69(IC601)
  • Page 28 7.2 IC Pin Functions(PD5840A) Pin No. Pin Name Function and Operation SYSPWR S ystem power control isens Illumination sense input Not used LAMP Lamp power supply control SYSMUTE2,1 System mute output RSEMUTE RSE mute BYTE Vss joint CNVSS LANMUTE AVC-LAN mute SWVDD SWVDD reset...
  • Page 29 Pin No. Pin Name Function and Operation ROMCS ROM correction chip select output TEST Test terminal ENC1+ VOL encoder input+ ENC1- VOL encoder input- 66–68 KST0-2 Key strobe power POWER key input 70-72 KDT0-2 Key data input asens ACC power sense input csej Cassette eject sense input bsens...
  • Page 30 - FM/AM Tuner Unit FM/AM 1ST IF 10.7MHz MPXREF 41kHz AMRF T51 Q51 CF51 CF52 CF53 AMDET AMANT L ch IC 2 FM MPX R ch AMIN ANT ADJ COMP MIXER, IF AMP, DET. LDET FMANT RFGND FMRF CF202 IC 3 AM 2ND IF X901 IMG ADJ...

  • Page 31: System Block Diagram

    7.3.1 SYSTEM BLOCK DIAGRAM 1. Standard system +B, ACC AVC-LAN +B, ACC SPEAKER AMPLIFIER NAVI 1DIN AVC-LAN HEAD UNIT OTHER MAKERS PIONEER or OTHER MAKERS OTHER MAKERS AVC-LAN CD-CH 2. RSA (option) system +B, ACC SPEAKER AMPLIFIER NAVI 1DIN AVC-LAN...
  • Page 32 3. RSE (option) system +B, ACC SPEAKER NAVI NTSC AMPLIFIER 1DIN HEAD UNIT AVC-LAN PIONEER or OTHER MAKERS OTHER MAKERS OTHER MAKERS AVC-LAN RSE ECU DVD-P CD-CH AVC-LAN AVC-LAN OTHER NTSC OTHER PIONEER MAKERS MAKERS REAR EXTENSION DISPLAY UNIT OTHER...

  • Page 33: Operational Flow Chart

    7.3.2 OPERATIONAL FLOW CHART Power ON VCC=5V Pin 62 VDD=5V Pin 16 bsens Pin 75 BSENS=L asens Pin 73 ASENS=L SWVDD←H Pin 11 IPPW←H Pin 22 SYSPWR←H Pin 1 Source keys operative Source ON Completes power-on operation. (After that, proceed to each source operation) KEX-M8727ZT/UC...
  • Page 34 7.4 CLEANING Before shipping out the product, be sure to clean the following portions by using the prescribed cleaning tools: Portions to be cleaned Cleaning tools Cassette heads Pinch rollers Cleaning paper : GED-008 Capstans KEX-M8727ZT/UC...
  • Page 35 PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS (USA) 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 PIONEER CORPORATION 2002 K-ZZS.AUG.

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