Pioneer DEH-27MP/XN/UC Service Manual
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Pioneer DEH-27MP/XN/UC Service Manual

Pioneer DEH-27MP/XN/UC Service Manual

High power cd/mp3/wma player with fm/am tuner
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HIGH POWER CD/MP3/WMA PLAYER WITH FM/AM TUNER
DEH-27MP
This service manual should be used together with the following manual(s) listed below.
For the parts numbers, adjustments, etc. which are not shown in this manual,
refer to the following manual(s).
Model No.
DEH-2750MP/XN/GS
CX-3158
SAFETY INFORMATION
WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of
California to cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65
PIONEER CORPORATION
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 2005
Order No.
Mech. Module
CRT3396
CRT3394
S10.1AAC
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
Remarks
CD Mech. Module : Circuit Description, Mech. Description, Disassembly
ORDER NO.
CRT3501
/XN/UC
K-ZZW. JULY 2005 Printed in Japan

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Summary of Contents for Pioneer DEH-27MP/XN/UC

  • Page 1 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 2005 K-ZZW.
  • Page 2 EXPLODED VIEWS AND PARTS LIST PACKING(Page 8) - PACKING SECTION PARTS LIST * : Non spare part Mark No. Description DEH-2750MP/XN/GS DEH-27MP/XN/UC Accessory Assy CEA4850 CEA4610 Screw Assy CEA3849 CEA4611 10 Polyethylene Bag CEG-162 CEG1173 11 Carton CHG5434 CHG5578 12 Contain Box...
  • Page 3 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 2004 K-ZZA.

  • Page 4: Safety Information

    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 5 [Important Check Points for Good Servicing] In this manual, procedures that must be performed during repairs are marked with the below symbol. Please be sure to confirm and follow these procedures. 1. Product safety Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by following the safety instructions described in this manual.

  • Page 6: Table Of Contents

    CONTENTS SAFETY INFORMATION ............................. 2 1. SPECIFICATIONS ............................5 2. EXPLODED VIEWS AND PARTS LIST ......................8 2.1 PACKING ..............................8 2.2 EXTERIOR............................... 10 2.3 CD MECHANISM MODULE........................12 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ..................14 3.1 BLOCK DIAGRAM ........................... 14 3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)................

  • Page 7: Specifications

    1. SPECIFICATIONS DEH-2790MP/XN/ID...
  • Page 8 DEH-2790MP/XN/ID...
  • Page 9 DEH-2790MP/XN/ID...

  • Page 10: Exploded Views And Parts List

    2. EXPLODED VIEWS AND PARTS LIST OTES : • Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List. • The > mark found on some component parts indicatesthe importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.
  • Page 11 (1) PACKING SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. Accessory Assy CEA4850 Carton See Contrast table(2) Screw Assy CEA3849 Contain Box See Contrast table(2) Screw CBA1650 Protector CHP2664 Polyethylene Bag CEG-127 Protector CHP2868 Screw CRZ50P090FTC 15-1 Owner's Manual See Contrast table(2)

  • Page 12: Exterior

    2.2 EXTERIOR DEH-2790MP/XN/ID...
  • Page 13 (1) EXTERIOR SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. Panel CNS8044 Screw BSZ26P060FTC CNV4692 Screw BSZ26P100FTC CNV4728 Cable CDE7703 CNV5576 Cord Assy XDE7008 ••••• Screw IMS20P030FZK Chassis Unit CXC3600 Case CNB2793 Detach Grille Assy See Contrast table(2) Holder CNC8659...

  • Page 14: Cd Mechanism Module

    2.3 CD MECHANISM MODULE 1GEM1024 2GEM1045 3GEM1035 DEH-2790MP/XN/ID...
  • Page 15 CD MECHANISM MODULE SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. Gear CNV8379 CD Core Unit(S10.1) CWX3096 Connector(CN101) CKS4182 Gear CNV8380 Connector(CN901) CKS4017 Gear CNV8381 Screw BMZ20P035FTC Gear CNV8382 Screw BSZ20P040FTC Gear CNV8383 Gear CNV8384 Screw(M2x4) CBA1362 Screw(M2x3)

  • Page 16: Block Diagram And Schematic Diagram

    3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM TUNER AMP UNIT 10 9 8 18 19 20 21 FM/AM TUNER UNIT IC 5 IC 3 EEPROM 3.3V 5.0V CN401 ANTENNA AM ANT FMRF IC 2 2.5V IC 1 FM ANT 3.3V FMRF MIXER, IF AMP...
  • Page 17 CN352 REAR OUTPUT RESET R Lch IC 961 RESET Q352 S-80834CNY TUNPDO TUNPDI LDET LDET TUNPDI TUNPDO TUNPCK TUNPCK VDD REGULATOR Q911 TUNPCE1 TUNPCE2 Q912 SYSTEM CONTROLLER IC 601(1/2) PE5447A DALMON CN901 BACKUP SENSE B.UP FUSE BSENS BSENS BACK UP Q931 ASENS ASENS...

  • Page 18: 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 CN901 Guide page Detailed page DEH-2770MP/XN/CS DEH-2750MP/XN/GS DEH-2790MP/XN/ID STRKEY2 BDATA BSCK NOTE : Symbol indicates a resistor.
  • Page 19 TUNER AMP UNIT > > CEK1208 BACKUP B.REM RL— FL— RR— FR— DEH-2790MP/XN/ID...
  • Page 20 DEH-2790MP/XN/ID...
  • Page 21 DEH-2790MP/XN/ID...
  • Page 22 DEH-2790MP/XN/ID...
  • Page 23 DEH-2790MP/XN/ID...

  • Page 24: Keyboard Unit

    3.3 KEYBOARD UNIT DEH-2790MP/XN/ID...
  • Page 25 KEYBOARD UNIT CN831 DEH-2790MP/XN/ID...

  • Page 26: Cd Mechanism Module(Guide Page)

    3.4 CD MECHANISM MODULE(GUIDE PAGE) PICKUP UNIT(P10)(SERVICE) M1 CXC4440 SPINDLE MOTOR M2 CXB8933 LOADING /CARRIAGE CD DRIVER MOTOR DEH-2790MP/XN/ID...
  • Page 27 SWITCHES: CD CORE UNIT(S10.1) S901:HOME SWITCH..ON-OFF S903:DSCSNS SWITCH..ON-OFF S904:12EJ SWITCH.....ON-OFF S905:8EJ SWITCH....ON-OFF The underlined indicates the switch position. SIGNAL LINE FOCUS SERVO LINE TRACKING SERVO LINE CARRIAGE SERVO LINE SPINDLE SERVO LINE CD CORE UNIT(S10.1) 3.3V REGULATOR SRAMLEVEL2 MICRO COMPUTER 3V REGULATOR CN651 SRAMLEVEL1...
  • Page 28 DEH-2790MP/XN/ID...
  • Page 29 DEH-2790MP/XN/ID...
  • Page 30 DEH-2790MP/XN/ID...
  • Page 31 DEH-2790MP/XN/ID...
  • Page 32 - Waveforms Note : 1. The encircled numbers denote measuring points in the circuit diagram. 2. Reference voltage REFO1(1.65V) 1 DSCSNS 1 DSCSNS 1 DSCSNS 5V/div 500ms/div 5V/div 500ms/div 5V/div 500ms/div 2 8SNS 5 CLCONT 2 8SNS 5V/div 5V/div 5V/div 3 12SNS 4 LOEJ 3 12SNS...
  • Page 33 0 FIN @ TE % RFAGC 500mV/div 200ms/div 500mV/div 2ms/div 1V/div 500µs/div # FE % RFAGC @ TE 500mV/div 500mV/div 500mV/div 9 TIN 500mV/div Focus Search waveform Track Open waveform 1 Track Jump waveform Ref.: Ref.: Ref.: REFO REFO REFO Mode: Mode: Mode:...
  • Page 34 7 SIN % RFAGC 1V/div 500ms/div 1V/div 500µs/div 8 CIN 9 TIN 500mV/div 1V/div 9 TIN @ TE 500mV/div 1V/div 0 FIN 1V/div CD-ROM >> CD-DA mode change(Band key) Black dot(800µm) during play Ref.: Ref.: REFO REFO Mode: Mode: Normal Normal DEH-2790MP/XN/ID...
  • Page 35 DEH-2790MP/XN/ID...

  • Page 36: Pcb Connection Diagram

    4. PCB CONNECTION DIAGRAM 4.1 TUNER AMP UNIT NOTE FOR PCB DIAGRAMS TUNER AMP UNIT 1.The parts mounted on this PCB CORD AS include all necessary parts for several destination. For further information for respective destinations, be sure to check with the schematic dia- gram.
  • Page 37 SIDE A CORD ASSY ANTENNA FRONT DEH-2790MP/XN/ID...
  • Page 38 TUNER AMP UNIT TEST DEH-2790MP/XN/ID...
  • Page 39 SIDE B DEH-2790MP/XN/ID...

  • Page 40: Keyboard Unit

    4.2 KEYBOARD UNIT KEYBOARD UNIT SIDE A DEH-2790MP/XN/ID...
  • Page 41 KEYBOARD UNIT SIDE B CN831 DEH-2790MP/XN/ID...

  • Page 42: Cd Core Unit(S10.1)

    4.3 CD CORE UNIT(S10.1) CD CORE UNIT(S10.1) SIDE A LOADING /CARRIAGE MOTOR SPINDLE MOTOR CN651 HOME REFO1 DEH-2790MP/XN/ID...
  • Page 43 CD CORE UNIT(S10.1) SIDE B 12EJ DSCSNS DEH-2790MP/XN/ID...

  • Page 44: Electrical Parts List

    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..The > mark found on some component parts indicatesthe importance of the safety factor of the part. •...
  • Page 45 Circuit Symbol and No. Part No. Circuit Symbol and No. Part No. R 658 (B,105,37) RS1/16S473J C 353 (A,132,116) CEJQ2R2M50 R 659 (B,74,40) RS1/16S221J C 354 (A,132,107) CEJQ2R2M50 R 660 (B,90,44) RS1/16S221J C 401 (B,158,66) CKSRYB103K50 R 662 (B,109,38) RS1/16S682J C 402 (B,152,56) CKSRYB103K50...
  • Page 46 Circuit Symbol and No. Part No. Circuit Symbol and No. Part No. R 1803 (B,14,158) RS1/16S0R0J R 310 (A,35,88) RS1/16SS183J R 1805 (B,29,155) RS1/16S0R0J R 601 (B,43,59) RS1/16S101J R 1807 (B,21,32) RS1/4SA471J R 602 (B,41,62) RS1/16S101J R 1808 (B,18,32) RS1/4SA471J R 606 (B,44,67) RS1/16S0R0J...
  • Page 47 Circuit Symbol and No. Part No. C 219 (A,34,7) CKSSYB104K10 C 220 (A,33,11) CKSSYB182K50 C 221 (B,35,6) CKSSYB104K10 C 222 (B,35,8) CCSSCH560J50 C 223 (B,33,8) CCSSCH4R0C50 C 224 (B,40,16) CKSSYB104K10 C 225 (B,45,14) CKSSYB103K16 C 226 (B,43,12) CCSSCH680J50 C 227 (A,45,10) CCSSCH470J50 C 228...

  • Page 48: Adjustment

    6. ADJUSTMENT 6.1 CD ADJUSTMENT 1) Cautions on adjustments 2) Test mode • In this product the single voltage (3.3V) is used for the This mode is used to adjust the CD mechanism module. regulator. The reference voltage is the REFO1 (1.65V) •...
  • Page 49 - Flow Chart [4]+[6]+Reset or [KEY] [4]+[6]+BU+ACC Contents Test Mode In Display [CD]or[SOURCE] Source On [BAND] RF AMP SPINDLE Power On Power On (T.Offset is not adjusted) Gain switching Speed switching (T.Offset is adjusted) [BAND] [→] [←] Tracking Servo Focus Close Focus Mode Automatic adjustment CRG+...

  • Page 50: Checking The Grating After Changing The Pickup Unit

    6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT • Note : The grating angle of the PU unit cannot be adjusted after the PU unit is changed. The PU unit in the CD mechanism module is adjusted on the production line to match the CD mechanism module and is thus the best adjusted PU unit for the CD mechanism module.
  • Page 51 Ech → Xch 20mV/div, AC Grating waveform Fch → Ych 20mV/div, AC 0° 30° 45° 60° 75° 90° DEH-2790MP/XN/ID...

  • Page 52: Error Mode

    6.3 ERROR MODE - Error Messages Error is displayed with number for Error cause when CD is inoperative or stops with Error during operation. The purpose is to reduce nonsense calls from users as well as to assist all related analysis and repair for defects at service station.

  • Page 53: System Microcomputer Test Program

    6.4 SYSTEM MICROCOMPUTER TEST PROGRAM - PCL Output In the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode cancelled), shift the TESTIN (Pin 15) terminal to H. The clock signal is output from the PCL terminal (Pin 14). The frequency of the clock signal is 786.432kHz that is one 16th of the fundamental frequency.

  • Page 54: General Information

    7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 DISASSEMBLY Removing the Case (not shown) 1. Remove the Case. CD Mechanism Module Removing the CD Mechanism Module (Fig.1) Remove the four screws. Disconnect the connector and then remove the CD Mechanism Module. Removing the Grille Assy (Fig.1) Release the two latchs and then remove the Grille Assy.
  • Page 55 - How to hold the Mechanism Unit 1. Hold the top and bottom frame. 2. Do not squeeze top frame's front portion too tight, because it is fragile. Do not squeeze. - Removing the Upper and Lower Frames 1. With a disc clamped, remove the four springs (A), Upper Frame the two springs (B), the two springs (C), and the four screws.
  • Page 56 - Removing the Pickup Unit 1. Apply shorting solder to the Pickup flexible cable. Disconnect the cable. 2. Set the mechanism to the clamp mode. 3. Remove the lead wires from the inner holder. 4. Remove the washer, styling holder, change arm, and pickup lock arm.

  • Page 57: Connector Function Description

    7.1.2 CONNECTOR FUNCTION DESCRIPTION Pin No. Pin No. B.UP B.REM DEH-2790MP/XN/ID...

  • Page 58: Parts

    7.2 PARTS 7.2.1 IC - Pin Functions(PE5447A) Pin No. Pin Name Function and Operation MODEL1 Model select input 2, 3 Not used AVSS 5, 6 Not used AVREF1 KYDT Display microcomputer data input DPDT Display microcomputer communication data output ADPW A/D converter power supply output TUNPDI PLL data input...
  • Page 59 Function and Operation Pin No. Pin Name RDS clock input asens ACC sense input bsens Back up sense input dsens Grille detach sense input source Source sense input 69, 70 X2, 1 Crystal oscillator connection pin IC(VPP) Not used AVDD AVREF1 Signal level input TEMP...
  • Page 60 - Pin Functions(PD6340A) Pin No. Pin Name Function and Operation SEG4-0 LCD segment output COM3-0 LCD common output VLCD LCD drive power supply 11-14 KST3-0 Key strobe output 15,16 KDT0,1 Key data input (analogue input) Remote control reception input DPDT Display data input Not used KYDT...
  • Page 61 - Pin Functions(UPD63763GJ) Pin No. Pin Name Function and Operation D.VDD Power supply for digital circuits D1.GND GND for 1.6V digital circuits reset Input of reset AB12-8 Address bus 12-8 from the microcomputer 9-16 AD7-0 Address/data bus 7-0 to the microcomputer Chip selection ASTB Address strobe...
  • Page 62 Pin No. Pin Name Function and Operation D.VDD Power supply for digital circuits Output of focus drive PWM + Output of focus drive PWM - Output of tracking drive PWM + Output of tracking drive PWM - Output of thread drive PWM + Output of thread drive PWM - Output of spindle drive PWM + Output of spindle drive PWM -...
  • Page 63 - Pin Functions(PE5454A) Pin No. Pin Name Format Function and Operation AVREF A power supply Positive power supply(5V) AVSS A power supply GND RFOK Output of state of RFOK Not used EVDD E power supply Positive power supply 6, 7 Not used IC/FLMD0 IC : VSS direct connection/FLMOD0 : Pull-down...
  • Page 64 Pin No. Pin Name Format Function and Operation xread CD LSI read control signal output XASTB CD LSI address strobe output BVSS B power supply GND BVDD B power supply Positive power supply 71-83 AD0-12 Address/data Bus 0-12 84-86 Not used FMODE For flash rewriting Connected to VSS via the resistor FLRQ...
  • Page 65 - FM/AM Tuner Unit 10 9 8 18 19 20 21 IC 5 IC 3 EEPROM 3.3V 5.0V AM ANT FMRF IC 2 2.5V IC 1 FM ANT 3.3V FMRF MIXER, IF AMP DET, FM MPX RF adj ANT adj CF52 IC 4 3.3V...

  • Page 66: Display

    7.2.2 DISPLAY - LCD(CAW1848) DEH-2790MP/XN/ID...

  • Page 67: Operational Flow Chart

    7.3 OPERATIONAL FLOW CHART Power ON AVREF1, VDD, AVDD=5V Pin 7, 68, 74, 75 bsens Pin 64 bsens=L asens Pin 63 asens=L Starts communication with Grille microcomputer. 300ms swvdd←L Pin 21 300ms In case of the above signal, the communication Source keys with Grille microcomputer may fail.

  • Page 68: Cleaning

    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 CD pickup lenses Cleaning liquid : GEM1004 Cleaning paper : GED-008 DEH-2790MP/XN/ID...

  • Page 69: Operations

    8. OPERATIONS DEH-2790MP/XN/ID...
  • Page 70 DEH-2790MP/XN/ID...
  • Page 71 DEH-2790MP/XN/ID...
  • Page 72 About the fixing screws for the front panel If you do not operate the Detaching and Replacing the Front Panel Function, use the supplied fixing screws and fix the front panel to this unit. Fixing screw (CXX1066) Fixing screw (CXX1066) DEH-2790MP/XN/ID...
  • Page 73 DEH-2790MP/XN/ID...
  • Page 74 - Jigs List Name Jig No. Remarks Test Disc TCD-782 Checking the grating L.P.F. Checking the grating g (Two pieces) DEH-2790MP/XN/ID...

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