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Pioneer DEH-2790MP/XN/ID 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-2790MP
DEH-2750MP
DEH-2770MP
This service manual should be used together with the following manual(s):
Model No.
Order No.
CX-3158
CRT3394
For details, refer to "Important Check Points for Good Servicing".
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 2004
Mech.Module
S10.1AAC
CD Mech. Module : Circuit Description, Mech. Description, Disassembly
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
DEH-2790MP/XN/ID
/XN/GS
/XN/CS
Remarks
ORDER NO.
CRT3396
/XN/ID
K-ZZA. NOV. 2004 Printed in Japan

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Summary of Contents for Pioneer DEH-2790MP/XN/ID

  • 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 2004 K-ZZA.

  • Page 2: Safety Information

    ICs inside the unit. 3. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment (shorting-solder) by referring to "the DISASSEMBLY". 4. After replacing the pickup unit, be sure to check the grating. DEH-2790MP/XN/ID...
  • Page 3 To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be installed before shipment. Please be sure to follow this method especially if it is specified in this manual. DEH-2790MP/XN/ID...

  • Page 4: Table Of Contents

    7. GENERAL INFORMATION ..........................52 7.1 DIAGNOSIS ............................. 52 7.1.1 DISASSEMBLY ............................. 52 7.1.2 CONNECTOR FUNCTION DESCRIPTION ..................55 7.2 PARTS..............................56 7.2.1 IC ................................56 7.2.2 DISPLAY ............................... 64 7.3 OPERATIONAL FLOW CHART ....................... 65 7.4 CLEANING............................... 66 8. OPERATIONS ..............................67 DEH-2790MP/XN/ID...

  • Page 5: Specifications

    1. SPECIFICATIONS DEH-2790MP/XN/ID...
  • Page 6 DEH-2790MP/XN/ID...
  • Page 7 DEH-2790MP/XN/ID...

  • Page 8: Exploded Views And Parts List

    • Screw adjacent to mark on the product are used for disassembly. • For the applying amount of lobricants or glue, follow the instructions in this manual. (In the case of no amount instructions,apply as you think it appropriate.) 2.1 PACKING DEH-2790MP/XN/ID...
  • Page 9 Handle CNC5395 Case Assy CXB3520 Bush CNV3930 Cord Assy XDE7008 Polyethylene Bag CEG-162 (2) CONTRAST TABLE DEH-2790MP/XN/ID, DEH-2750MP/XN/GS and DEH-2770MP/XN/CS are constructed the same except for the fol- lowing: Mark Description DEH-2790MP/XN/ID DEH-2750MP/XN/GS DEH-2770MP/XN/CS Carton CHG5470 CHG5434 CHG5435 Contain Box...

  • Page 10: Exterior

    2.2 EXTERIOR DEH-2790MP/XN/ID...
  • Page 11 Transistor(Q911, 921, 991) 2SD2396 Bracket CNC6791 Holder CNC8042 Panel See Contrast table(2) Cover CNM6276 (2) CONTRAST TABLE DEH-2790MP/XN/ID, DEH-2750MP/XN/GS and DEH-2770MP/XN/CS are constructed the same except for the fol- lowing: Mark Description DEH-2790MP/XN/ID DEH-2750MP/XN/GS DEH-2770MP/XN/CS Tuner Amp Unit CWM9693 CWM9693 CWM9970...

  • Page 12: Cd Mechanism Module

    2.3 CD MECHANISM MODULE 1GEM1024 2GEM1045 3GEM1035 DEH-2790MP/XN/ID...
  • Page 13 CND2712 Bracket CND1895 Screw JFZ20P020FTC CNC9968 Screw JGZ17P022FTC CND1909 ••••• Lever CND2032 Washer YE20FTC Pickup Unit(P10)(Service) CXX1641 Lever CNC9984 Sheet CNM8134 Screw IMS26P030FTC Collar CNV7798 Spring CBL1635 Guide CNV7799 Clamper CNV8372 CNV8403 Rack CNV8374 Holder CNV8376 Holder CNV8377 CNV8378 DEH-2790MP/XN/ID...

  • Page 14: Block Diagram And Schematic Diagram

    IC 301 IC 701 BRST,BRXEN,BSRQ BRST,BRXEN,BSRQ,BDATA,BSCK PE5454A BA5835FP BDATA,BSCK Q991 B.UP Q992 12EJ VDCONT DSCSNS HOME VDSENS VDSENS VDCONT VDCONT S904 S905 S903 S901 3V REGULATOR 12EJ DSCSNS HOME 3VDD IC 703 IC 203 S-812C33AUA-C2N V3R3D NJM2885DL1-33 3.3V REGULATOR DEH-2790MP/XN/ID...

  • Page 15: Keyboard Unit

    CN1801 Q801 SWVDD SW5V SOURCE SWVDD SWVDD SOURCE SOURCE INTRQ VDSENS DSENS DSENS DSENS Q821 B.UP KEY MATRIX Q822 ILMPW KEY DATA DPDT DPDT DPDT X1801 5MHz KYDT LCD DRIVER/ KYDT KYDT KEY CONTROLLER SW5V VLCD IC 1801 PD6340A DEH-2790MP/XN/ID...

  • Page 16: Overall Connection Diagram(Guide Page)

    "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. Decimal points for resistor No differentiation is made between chip resistors and and capacitor fixed values discrete resistors.
  • Page 17 TUNER AMP UNIT > > CEK1208 BACKUP B.REM RL— FL— RR— FR— DEH-2790MP/XN/ID...
  • Page 18 DEH-2790MP/XN/ID...
  • Page 19 DEH-2790MP/XN/ID...
  • Page 20 DEH-2790MP/XN/ID...
  • Page 21 DEH-2790MP/XN/ID...

  • Page 22: Keyboard Unit

    3.3 KEYBOARD UNIT DEH-2790MP/XN/ID...
  • Page 23 KEYBOARD UNIT CN831 DEH-2790MP/XN/ID...

  • Page 24: 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 25 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 SRAMLEVEL0 TYPE_A/D & DEH-2790MP/XN/ID...
  • Page 26 DEH-2790MP/XN/ID...
  • Page 27 DEH-2790MP/XN/ID...
  • Page 28 DEH-2790MP/XN/ID...
  • Page 29 DEH-2790MP/XN/ID...
  • Page 30 7 SIN 500mV/div 200mV/div 1V/div @ TE 500mV/div 9 TIN 500mV/div CD-ROM play operation(Regular track Jump) Spindle waveform during play operation Spindle waveform during play operation (Wider) Ref.: Ref.: Ref.: REFO REFO REFO Mode: Mode: Mode: Normal Normal Normal DEH-2790MP/XN/ID...
  • Page 31 500mV/div 4 LOEJ 3 12SNS 9 TIN 5V/div 5V/div 500mV/div 4 LOEJ 5V/div 12 cm CD Eject operation 8 cm CD Eject operation CD-DA >> CD-ROM mode change(Band key) Ref.: Ref.: Ref.: REFO Mode: Mode: Mode: Normal Normal Normal DEH-2790MP/XN/ID...
  • Page 32 % 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 33 DEH-2790MP/XN/ID...

  • Page 34: Pcb Connection Diagram

    CORD AS include all necessary parts for several destination. For further information for respective destinations, be sure to check with the schematic dia- gram. 2.Viewpoint of PCB diagrams Capacitor Connector SIDE A SIDE B P.C.Board Chip Part CN901 CN1801 DEH-2790MP/XN/ID...
  • Page 35 SIDE A CORD ASSY ANTENNA FRONT DEH-2790MP/XN/ID...
  • Page 36 TUNER AMP UNIT TEST DEH-2790MP/XN/ID...
  • Page 37 SIDE B DEH-2790MP/XN/ID...

  • Page 38: Keyboard Unit

    4.2 KEYBOARD UNIT KEYBOARD UNIT SIDE A DEH-2790MP/XN/ID...
  • Page 39 KEYBOARD UNIT SIDE B CN831 DEH-2790MP/XN/ID...

  • Page 40: 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 41 CD CORE UNIT(S10.1) SIDE B 12EJ DSCSNS DEH-2790MP/XN/ID...

  • Page 42: Electrical Parts List

    R 614 (B,69,63) RS1/16S104J D 931 (A,67,112) Diode HZS7L(C3) R 633 (B,51,70) RS1/16S104J D 932 (A,49,109) Diode HZS7L(A1) R 653 (B,44,37) RS1/16S104J D 991 (A,17,62) Diode HZS7L(C3) R 654 (B,73,51) RS1/16S102J L 151 (A,142,66) Inductor LAU2R2K R 655 (A,69,54) RD1/4PU102J DEH-2790MP/XN/ID...
  • Page 43 C 303 (A,130,121) CFTNA224J50 IL 1802 (B,20,150) Lamp 40mA,14V CEL1651 C 304 (A,120,107) CFTNA224J50 CAW1848 C 309 (B,133,128) CKSQYB225K10 C 310 (B,135,132) CKSQYB225K10 RESISTORS C 312 (A,101,121) CEJQ100M16 R 1801 (B,22,59) RS1/16S222J C 313 (B,98,138) CKSRYB104K16 R 1802 (B,24,59) RS1/16S222J DEH-2790MP/XN/ID...
  • Page 44 C 209 (A,54,29) CKSSYB104K10 R 304 (A,50,78) RS1/16SS183J C 212 (A,45,37) CKSRYB105K10 R 305 (A,42,77) RS1/16SS822J C 216 (A,25,8) CKSSYB332K50 C 217 (A,28,12) CKSSYB104K10 R 307 (A,36,85) RS1/16SS183J C 218 (A,25,7) CKSSYB473K10 R 308 (A,32,83) RS1/16SS183J R 309 (A,38,89) RS1/16SS183J DEH-2790MP/XN/ID...
  • Page 45 C 716 (A,61,40) CKSSYB103K16 C 722 (B,52,48) CKSQYB475K6R3 C 723 (A,26,41) CKSRYB105K10 C 903 (B,56,70) CKSSYB471K50 C 906 (A,40,77) CKSRYB224K16 C 907 (A,47,76) CKSSYB103K16 C 910 (B,60,71) CKSQYB225K10 Miscellaneous Parts List Pickup Unit(P10)(Service) CXX1641 Motor Unit(SPINDLE) CXC4440 Motor Unit(LOADING/CARRIAGE) CXB8933 DEH-2790MP/XN/ID...

  • Page 46: Adjustment

    1k ohms in series. • The load and eject operation is not guarantied with the mechanism upside down. If the mechanism is blocked due to mistaken eject operation, reset the product or turn off and on the ACC to restore it. DEH-2790MP/XN/ID...
  • Page 47 → → TYP(1X) TYP(2X) TRK 22 MIN 22 SEC 22 TRK 11 MIN 11 SEC 11 TRK 11 MIN 11 SEC 11 TRK 22 MIN 22 SEC 22 As for the double speed (2x), audio output cannot be supported DEH-2790MP/XN/ID...

  • Page 48: Checking The Grating After Changing The Pickup Unit

    Because of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the average angle. • Hint Reloading the disc changes the clamp position and may decrease the "wobble". DEH-2790MP/XN/ID...
  • Page 49 Ech → Xch 20mV/div, AC Grating waveform Fch → Ych 20mV/div, AC 0° 30° 45° 60° 75° 90° DEH-2790MP/XN/ID...

  • Page 50: Error Mode

    If TOC can’t be read, error wouldn’t occur, but mechanism still continues its operation. The upper digits of error code is mainly classified by 3 kinds as follows: 1x: Setup related error, 3x: Search related error, Ax: Other errors. DEH-2790MP/XN/ID...

  • Page 51: System Microcomputer Test Program

    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. The clock signal should be 786.432kHz ± 31.5Hz. If the clock signal is out of the range, the X'tal (X601) should be replaced with new one. DEH-2790MP/XN/ID...

  • Page 52: General Information

    Grille Assy. Fig.1 Grille Assy Removing the Tuner Amp Unit (Fig.2) Remove the screw. Remove the three screws. Straighten the tabs at three locations indicated. Remove the screw and then remove the Tuner Amp Unit. Tuner Amp Unit Fig.2 DEH-2790MP/XN/ID...
  • Page 53 Caution: Before installing the carriage mechanism in the frames, be sure to apply some alcohol to the dampers and set the mechanism to the clamp mode. Carriage Mechanism Damper Lower Frame Damper Damper DEH-2790MP/XN/ID...
  • Page 54 Caution: In assembling, move the planet gear to the load/eject position before setting the feed screw in the inner holder. Washer Pickup Lock Arm Change Arm Styling Holder Feed Screw Inner Holder Planet Gear DEH-2790MP/XN/ID...

  • Page 55: Connector Function Description

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

  • Page 56: Parts

    E.VOL data output E.VOL clock output Not used TUNPCE2 PLL chip enable output 2 TUNPCE PLL chip enable output RDS LK input(Not used) RDSLK RDS clock input(Not used) RDS57K RDS 57K input(Not used) RESET Reset LDET PLL lock detection input DEH-2790MP/XN/ID...
  • Page 57 P-BUS serial pole request input Wired remote control input(Not used) STRKEY1 * PE5447A IC's marked by * are MOS type. Be careful in handling them because they are very liable to be damaged by electrostatic induction. BA33BC0FP Vref Vref DEH-2790MP/XN/ID...
  • Page 58 Key data output MODA Crystal oscillator connection pin Crystal oscillator connection pin 25,26 KDT2,3 Key data input Not used KST4 Key strobe output 29-32 Not used 33-55 SEG35-13 LCD segment output Power supply 57-64 SEG12-5 LCD segment output * PD6340A DEH-2790MP/XN/ID...
  • Page 59 Output of DRAM ras cas)(LDQM) Output of DRAM lower cas(LDQM) cas!(UDQM) Output of DRAM upper cas(UDQM) Output of DRAM we oe(cas) Output of DRAM oe(cas) D.GND Ground for digital circuits 73-88 RDB0-15 Input/output of DRAM data0-15 89-99 RA0-10 Output of DRAM address0-10 DEH-2790MP/XN/ID...
  • Page 60 Connected to the capacitor for output of REFOUT Reversal input of FE Output of FE ADIN Input of FE, TE A/D converter Reversal input of TE Output of TE Output of LD Input of PD D.GND Ground for digital circuits * UPD63763GJ DEH-2790MP/XN/ID...
  • Page 61 CD mute control output 56-58 Not used CD LSI chip selection output Not used xwait CD LSI write control signal output CLKOUT Internal system clock output(Open) LOCK Spindle lock input Not used xwrite CD LSI write control signal output Not used DEH-2790MP/XN/ID...
  • Page 62 CD-DA analog/digital output change setup testin Chip check test program starting input HOME Home SW sense input TEMP Temperature information sense input VDSENS VD power supply short sense input Not used * PE5454A Format Meaning CMOS NJM2885DL1-33 Thermal Protection Bandgap Reference DEH-2790MP/XN/ID...
  • Page 63 22 AUDIOGND audio ground Ground of audio block 23 L ch O L channel output FM stereo “L-ch” signal output or AM audio output 24 R ch O R channel output FM stereo “R-ch” signal output or AM audio output DEH-2790MP/XN/ID...

  • Page 64: Display

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

  • Page 65: Operational Flow Chart

    In case of the above signal, the communication Source keys with Grille microcomputer may fail. operative If the time interval is not 300msec, the oscillator may be defective. Source ON SYSPW←H Pin 43 Completes power-on operation.(After that, proceed to each source operation.) DEH-2790MP/XN/ID...

  • Page 66: 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 67: Operations

    8. OPERATIONS DEH-2790MP/XN/ID...
  • Page 68 DEH-2790MP/XN/ID...
  • Page 69 DEH-2790MP/XN/ID...
  • Page 70 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 71 DEH-2790MP/XN/ID...
  • Page 72 - 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...

This manual is also suitable for:

Deh-2750mp/xn/gsDeh-2770mp/xn/cs

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