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Pioneer KEH-M8276ZT Service Manual
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Pioneer KEH-M8276ZT Service Manual

Pioneer KEH-M8276ZT Service Manual

Multi-cd control am/fm cassette deck
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S
ervice
M anua l
MULTI-CD CONTROL AM/FM CASSETTE DECK
KEH-M8276
VEHICLE
DESTINATION
COROLLA
THAILAND
NOTE:
-
Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
- See the separate manual CX-631(CRT1640) for the cassette mechanism description.
- The cassette mechanism module employed in this model is one of 2L series.
CONTENTS
1. SAFETY INFORMATION ............................................3
2. EXPLODED VIEWS AND PARTS LIST .......................4
3. SCHEMATIC DIAGRAM .............................................8
4. PCB CONNECTION DIAGRAM ................................18
5. ELECTRICAL PARTS LIST ........................................28
6. ADJUSTMENT..........................................................35
7. GENERAL INFORMATION .......................................37
7.1 PARTS .................................................................37
7.1.1 IC ................................................................37
7.1.2 DISPLAY.....................................................41
PIONEER ELECTRONIC CORPORATION
PIONEER ELECTRONICS SERVICE INC.
PIONEER ELECTRONIC [EUROPE] N.V.
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 501 Orchard Road, #10-00, wheelock Place, Singapore 238880
C PIONEER ELECTRONIC CORPORATION 1997
TOYOTA
PRODUCED AFTER
OCTOBER 1997
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
ZT
TOYOTA PART No.
ID No.
86120-YZB13
T7402
7.2 DIAGNOSIS ........................................................42
7.2.2 DISASSEMBLY .........................................46
7.2.4 TEST MODE...............................................48
7.3 EXPLANATION ...................................................50
7.3.1 BLOCK DIAGRAM.....................................50
7.3.2 SYSTEM BLOCK DIAGRAM.....................52
8. OPERATIONS AND SPECIFICATIONS.....................53
ORDER NO.
CRT2132
X1N/ES
PIONEER MODEL No.
KEH-M8276ZT/X1N/ES
K-ZEM. NOV. 1997 Printed in Japan

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Summary of Contents for Pioneer KEH-M8276ZT

  • Page 1: Table Of Contents

    P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 501 Orchard Road, #10-00, wheelock Place, Singapore 238880 C PIONEER ELECTRONIC CORPORATION 1997 K-ZEM. NOV. 1997 Printed in Japan...
  • Page 2 KEH-M8276ZT...

  • Page 3: Safety Information

    KEH-M8276ZT 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.

  • Page 4: Exploded Views And Parts List

    KEH-M8276ZT 2. EXPLODED VIEWS AND PARTS LIST 2.1 EXTERIOR Fig. 1...
  • Page 5 KEH-M8276ZT NOTE: - Parts marked by “*”are generally unavailable because they are not in our Master Spare Parts List. - Screws adjacent to ∇ mark on the product are used for disassembly. - EXTERIOR SECTION PARTS LIST Mark No. Description Part No.
  • Page 6 KEH-M8276ZT 2.2 CASSETTE MECHANISM MODULE Fig. 2...
  • Page 7 KEH-M8276ZT - CASSETTE MECHANISM MODULE SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BSZ20P040FMC 36 Worm Wheel ENV1440 2 Washer CBF1037 37 Gear ENR1028 3 Washer CBF1038 38 Lever ENV1442 4 Washer CBG1003...

  • Page 8: Schematic Diagram

    KEH-M8276ZT 3. SCHEMATIC DIAGRAM 3.1 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 Guide page Detailed page E F G...
  • Page 9 KEH-M8276ZT Fig. 3...
  • Page 10 KEH-M8276ZT...
  • Page 11 KEH-M8276ZT Fig. 4...
  • Page 12 KEH-M8276ZT...
  • Page 13 KEH-M8276ZT Fig. 5...
  • Page 14 KEH-M8276ZT 3.2 TUNER UNIT TUNER UNIT PA4023B...
  • Page 15 KEH-M8276ZT Fig. 6...
  • Page 16 KEH-M8276ZT 3.3 CASSETTE MECHANISM MODULE CN602...
  • Page 17 KEH-M8276ZT Fig. 7 E F G...

  • Page 18: Pcb Connection Diagram

    KEH-M8276ZT 4. PCB CONNECTION DIAGRAM 4.1 CONTROL UNIT NOTE FOR PCB DIAGRAMS CONTROL UNIT 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 19 KEH-M8276ZT SIDE A Fig. 8...
  • Page 20 KEH-M8276ZT CONTROL UNIT...
  • Page 21 KEH-M8276ZT SIDE B Fig. 9...
  • Page 22 KEH-M8276ZT 4.2 AMP UNIT AMP UNIT SIDE A Fig. 10 SIDE B Fig. 11...
  • Page 23 KEH-M8276ZT 4.3 KEYBOARD UNIT SIDE B SIDE A Fig. 13 Fig. 12...
  • Page 24 KEH-M8276ZT 4.4 TUNER UNIT SIDE A Fig. 14...
  • Page 25 KEH-M8276ZT SIDE B Fig. 15...
  • Page 26 KEH-M8276ZT 4.5 CASSETTE MECHANISM MODULE DECK UNIT Fig. 16...
  • Page 27 KEH-M8276ZT SIDE A PCB UNIT Fig. 17 SIDE B Fig. 18 REEL PCB Fig. 19...

  • Page 28: Electrical Parts List

    KEH-M8276ZT 5. ELECTRICAL PARTS LIST NOTES: - Parts whose parts numbers are omitted are subject to being not supplied. - T he part numbers shown below indicate chip components. Chip Resistor RS1/_S___J,RS1/__S___J Chip Capacitor (except for CQS..) CKS.., CCS.., CSZS..
  • Page 29 KEH-M8276ZT =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/16S123J CEJA3R3M50 RS1/16S103J CKSRYB102K50 RS1/10S153J CCSRCH100D50 CKSRYB103K25 CAPACITORS CCSRCH100D50 CCSRCH220J50 CKSRYB332K50 CKSRYB222K50 CKSQYB473K16 CCSRCH6R0D50 CKSQYB473K16 CKSRYB222K50 CKSQYB103K25 CKSQYB473K16 CCSRCH120J50...
  • Page 30 KEH-M8276ZT =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Transistor 2SC4116 RS1/10S332J Transistor 2SA1048 RS1/10S332J Transistor 2SC4116 RS1/10S821J Transistor 2SC4116 RS1/10S562J Transistor 2SC4116 RS1/10S821J Transistor 2SK330 RS1/10S242J Transistor...
  • Page 31 KEH-M8276ZT =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S473J RS1/10S222J RS1/10S473J RD1/4PU152J RD1/4PU472J RD1/4PU152J RD1/4PU102J RS1/10S472J RD1/4PU222J RS1/10S472J RS1/10S152J RS1/10S271J RS1/10S102J RS1/10S271J RS1/10S103J RS1/10S472J RS1/10S102J RS1/10S472J RS1/10S393J...
  • Page 32 KEH-M8276ZT =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CEHAQ470M10 CEJANP100M10 CEHAQ470M10 CEJANP100M10 CEHAQ470M10 CEJA220M10 CEHAQ470M10 CKSQYB103K50 CEJA1R0M50 CEJA2R2M50 CKSQYB102K50 CEJA1R0M50 100µF/16V CCH1299 CEJA1R0M50 CEJA1R0M50 CEJA1R0M50 CEJA101M6R3 CEJA1R0M50 0.047F/5.5V...
  • Page 33 KEH-M8276ZT =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Unit Number : CWM5225 Unit Number : EWM1007 Unit Name : Keyboard Unit Unit Name : Deck Unit MISCELLANEOUS...
  • Page 34 KEH-M8276ZT =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- CKSRYB103K25 CEV1R0M50 CKSQYB104K16 CKSYB474K16 CKSYB474K16 CKSQYB104K16 CKSQYB104K16 CKSYB224K25 CKSQYB392K50 CKSQYB103K50 CKSQYB103K50 CKSYB104K50 CKSQYB103K50 CKSRYB182K50 CKSRYB822K50 CKSRYB333K16 CKSRYB471K50 Unit Number : Unit Name : PCB Unit Switch (Load) ESG1004 Switch (70µS)

  • Page 35: Adjustment

    KEH-M8276ZT 6. ADJUSTMENT - Connection Diagram RL– RR– 4kΩ mV Meter (1) Oscilloscope 4kΩ DC Regulated Power Supply +13.2V Antenna Jack TUNER UNIT (TOP VIEW) Pin26 CONTROL UNIT Pin 19 DC V Meter(1) Pin14 Pin13 VR151 Pin 6 VR156 VR154...
  • Page 36 KEH-M8276ZT FM ADJUSTMENT NOTE:Before proceeding to further adjustments after switching power ON, let the tuner run for ten minutes to allow the circuits to stabilize. Modulation M : MONO MOD., 400Hz, 30%(22.5kHz Dev.) S : STEREO MOD., 1kHz, L or R=30%(20.25+7.5kHz Dev.)

  • Page 37: General Information

    KEH-M8276ZT 7. GENERAL INFORMATION 7.1 PARTS 7.1.1 IC PA4023B *SN761027DL 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 5.1dB FRONT BUFFER 4 CHANNEL 2 BANDS LOUD &...
  • Page 38 KEH-M8276ZT Pin Functions(PD4806C) Pin No. Pin Name Format Function and Operation 1–3 Not used AVSS A/D GND Not used AVREF1 MUTE System mute output AM/fm AM/FM select output Antenna control output Serial data input Serial data output Serial clock output for LCD driver...
  • Page 39 KEH-M8276ZT Pin No. Pin Name Format Function and Operation AVDD A/D converter analog power supply (VDD) AVREF0 (A/D converter standard voltage input) A/D for volume input Signal level input SD input *PD4806C IC's marked by* are MOS type. Be careful in handling them because they are very liable to be damaged by electrostatic induction.
  • Page 40 KEH-M8276ZT Pin Functions(LC75853NW) Pin No. Pin Name Format Function and Operation LCD back light control output Illumination control output Not used 6-27 S6-27 LCD segment signal output 6-27 8-31 Not used 32-40 S32-40 LCD segment signal output 32-40 41-43 COM3-1...

  • Page 41: Display

    KEH-M8276ZT 7.1.2 DISPLAY - CAW1415 SEGMENT COMMON Fig. 21...

  • Page 42: Diagnosis

    KEH-M8276ZT 7.2 DIAGNOSIS 7.2.1 SELF-DIAGNOSTIC FUNCTION...
  • Page 43 KEH-M8276ZT...
  • Page 44 KEH-M8276ZT...
  • Page 45 KEH-M8276ZT...

  • Page 46: Disassembly

    KEH-M8276ZT 7.2.2 DISASSEMBLY - Removing the Case(not shown) 1. Insert and turn a screwdriver to remove the case. - Removing the Cassette Mechanism Module (not shown) 1. Removing the four screws. 2. Disconnect the connector , and then removing the Cassette Mechanism Module.

  • Page 47: Connector Function Description

    KEH-M8276ZT 7.2.3 CONNECTOR FUNCTION DESCRIPTION ( – ) ( + ) ( – ) ( – ) SGND MUTE ( + ) ( + ) Fig. 24...

  • Page 48: Test Mode

    KEH-M8276ZT 7.2.4 TEST MODE Test mode is mainly used adjustment of CDX-M8066ZT/WL. a) CD multi-player Function SCAN Power ON/OFF TRK UP FWD kick TRK DOWN REV kick Tracking close DISC DOWN Tracking open Focus close DISC UP Change discs (up) DISP Change display (DISC/TRACK No↔MIN.´SEC.
  • Page 49 KEH-M8276ZT - Flow Chart Press the CD key three times, while holding down the [1] and [6] keys simultaneously. Diagnosis mode Press the TRK UP and CD keys simultaneously. CD test mode Normal focus close 00 only <Regulator OFF> Normal display...

  • Page 50: Explanation

    KEH-M8276ZT 7.3 EXPLANATION 7.3.1 BLOCK DIAGRAM...
  • Page 51 KEH-M8276ZT Fig. 26...

  • Page 52: System Block Diagram

    KEH-M8276ZT 7.3.2 SYSTEM BLOCK DIAGRAM AUDIO SYSTEM FOUR SPEAKERS MAIN UNIT MULTI-CD CDX-M8226ZT/ES MUSIC CD Fig. 27...

  • Page 53: Operations And Specifications

    KEH-M8276ZT 8. OPERATIONS AND SPECIFICATIONS 8.1 OPERATIONS Listening to the Radio Band SW Balance Power SW Fader Volume Bass Treble Preset Scan,Preset Scan Fig. 28 Tuning Listening to the Tape Eject Dolby B Balance Fader Power SW Bass Volume Treble Auto Program Search Fig.
  • Page 54 KEH-M8276ZT 8.2 SPECIFICATIONS Power source..........13.2V±0.2V DC FM tuner Frequency...........87.5–108.0 MHz Grounding system........Negative type S/N ..............50dB or more x163 Dimensions.......180(W) 50(H) (D)mm Distortion............2.0% or less Weight..............1.240kg IF interference ..........84dB or more Image interference........46dB or more Amplifier Maximum power output .......20W or more AM tuner Tone controls(bass) ........±8dB(100Hz)

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