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Pioneer DEH-P4950MP/XU/CN5 Service Manual
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Pioneer DEH-P4950MP/XU/CN5 Service Manual

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CD RECEIVER
DEH-P4950MP
This service manual should be used together with the following manual(s):
Model No.
Order No.
CX-3195
CRT3815
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 2006
Mech.Module
S10.5COMP2
CD Mech. Module : Circuit Descriptions, Mech. Descriptions, Disassembly
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
DEH-P4950MP/XU/CN5
Remarks
ORDER NO.
CRT3817
/XU/CN5
K-ZZA. OCT. 2006 Printed in Japan

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Summary of Contents for Pioneer DEH-P4950MP/XU/CN5

  • 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 2006 K-ZZA.

  • Page 2: Safety Information

    (shorting-solder) by referring to "the DISASSEMBLY". 4. After replacing the pickup unit, be sure to check the grating. 5. Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by electrostatic induction. DEH-P4950MP/XU/CN5...
  • 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-P4950MP/XU/CN5...

  • Page 4: Table Of Contents

    7. GENERAL INFORMATION ..........................49 7.1 DIAGNOSIS ............................. 49 7.1.1 DISASSEMBLY ............................. 49 7.1.2 CONNECTOR FUNCTION DESCRIPTION ..................52 7.2 PARTS..............................53 7.2.1 IC ................................53 7.2.2 DISPLAY ............................... 62 7.3 OPERATIONAL FLOW CHART ....................... 63 8. OPERATIONS ..............................64 DEH-P4950MP/XU/CN5...

  • Page 5: Specifications

    1. SPECIFICATIONS DEH-P4950MP/XU/CN5...

  • Page 6: Exploded Views And Parts List

    • Screw adjacent to mark on the product are used for disassembly. • For the applying amount of lubricants 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-P4950MP/XU/CN5...
  • Page 7 CEG-127 Protector YHP5009 Screw CRZ50P090FTC 22-1 Owner's Manual YRB5029 Screw TRZ50P080FTC 22-2 Installation Manual YRB5030 22-3 Caution Card CRP1310 Polyethylene Bag CEG-158 22-4 Warranty Card ARY7046 Handle CND3707 ••••• Owner's Manual,Installation Manual Part No. Language YRB5029, Simplified Chinese YRB5030 DEH-P4950MP/XU/CN5...

  • Page 8: Exterior

    2.2 EXTERIOR DEH-P4950MP/XU/CN5...
  • Page 9 YXA5196 Detachable Assy YXA5207 Screw BPZ20P100FTB Button(Detach) CAC9941 Button(AUDIO/FUNC) CAC9942 Button(L/R) CAC9946 Button(UP) CAC9947 Button(DOWN) CAC9948 Button(EJECT) CAC9949 Button(EQ/BAND) CAC9950 Spring CBH2210 Cover CNS8758 Knob Unit(SOURCE,VOLUME) CXC7054 Spring CBL1761 Button(1-6) YAC5118 Jack CKN1047 Connector(CN1801) CKS5663 LCD(LCD1801) YAW5080 Holder YNC5025 DEH-P4950MP/XU/CN5...

  • Page 10: Cd Mechanism Module

    2.3 CD MECHANISM MODULE DEH-P4950MP/XU/CN5...
  • Page 11 Bracket CND2583 CND2584 Lever CND2585 CND2586 Bracket CND2587 CND2588 Lever CND2589 Holder CNV7201 Gear CNV7207 Gear CNV7208 Gear CNV7209 Gear CNV7210 Gear CNV7211 Gear CNV7212 Rack CNV7214 CNV7216 Roller CNV8189 Gear CNV7219 Guide CNV7361 Gear CNV7595 Guide CNV8448 CNV7805 DEH-P4950MP/XU/CN5...

  • Page 12: Block Diagram And Schematic Diagram

    SPINDLE MOTOR RESET /RESET /RESET LOEJ CDRST LOEJ CLCONT CLCONT LCOP LOAD/ CARRIAGE BRST,BRXEN,BSRQ,BDATA,BSCK BRST,BRXEN,BSRQ MOTOR LCOM CONT CONT BDATA,BSCK Q702 B.UP Q701 12EJ DSCSNS HOME S904 S905 S901 12EJ HOME S903 DSCSNS VDSENS EEPROM CS,SK IC202 DI,DO S-93C56BD0I-J8 DEH-P4950MP/XU/CN5...

  • Page 13: Keyboard Unit

    B.UP CLOCK Q842 ILMPW SWVDD S1827 SSENS SSENSE REM.CON. B.UP SSENS ROT1 ROT1 IC1802 ROT1 GP1UX51RK ROT0 ROT0 ROT0 VOLUME KEY DATA PUSH:SOURCE X1801 5MHz DPDT DPDT DPDT LCD DRIVER/ KEY CONTROLLER KYDT KYDT KYDT IC 1801 LCD1801 PD6538A DEH-P4950MP/XU/CN5...

  • Page 14: Overall Connection Diagram(Guide Page)

    "ELECTRICAL PARTS LIST". Large size SCH diagram CN701 CD(-20 dB) : -19.4 dB Guide page FM(10%) : -33.5 dB Detailed page AM(15%) : -30.0 dB AUX IN(-20 dB) : -17.8 dB SYSTEM CONTROLLER IP-BUS(-20 dB) : -17.8 dB CN1801 DEH-P4950MP/XU/CN5...
  • Page 15 No differentiation is made between chip capacitors and discrete capacitors. For resistors and capacitors in the circuit diagrams, their resistance values or capacitance values are expressed in codes: Ex. *Resistors Code Practical value 12k ohms 10k ohms *Capacitors Code Practical value 0.01uF 101/10 100uF/10V DEH-P4950MP/XU/CN5...
  • Page 16 DEH-P4950MP/XU/CN5...
  • Page 17 DEH-P4950MP/XU/CN5...
  • Page 18 DEH-P4950MP/XU/CN5...
  • Page 19 DEH-P4950MP/XU/CN5...

  • Page 20: Keyboard Unit

    3.3 KEYBOARD UNIT DEH-P4950MP/XU/CN5...
  • Page 21 KEYBOARD UNIT AUX1 INPUT D1805-1815,D1822-1824 : SML-310PT DEH-P4950MP/XU/CN5...

  • Page 22: Cd Mechanism Module(Guide Page)

    3.4 CD MECHANISM MODULE(GUIDE PAGE) PICKUP UNIT(P10.5)(SERVICE) EEPROM SWITCHES: CD CORE UNIT(S10.5COMP2) 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. M1 CXC7134 SPINDLE MOTOR M2 CXC4026 LOADING/CARRIAGE MOTOR CD DRIVER DEH-P4950MP/XU/CN5...
  • Page 23 CD CORE UNIT(S10.5COMP2) SIGNAL LINE FOCUS SERVO LINE TRACKING SERVO LINE CARRIAGE SERVO LINE SPINDLE SERVO LINE CN701 & DEH-P4950MP/XU/CN5...
  • Page 24 DEH-P4950MP/XU/CN5...
  • Page 25 DEH-P4950MP/XU/CN5...
  • Page 26 DEH-P4950MP/XU/CN5...
  • Page 27 DEH-P4950MP/XU/CN5...
  • Page 28 200 ms/div 500 mV/div 2 ms/div 1 V/div %RFAGC 500 mV/div 500 mV/div 500 mV/div 9TIN 500 mV/div Focus Search waveform Track Open waveform 1 Track Jump waveform Ref.: Ref.: Ref.: REFO REFO REFO Mode: Mode: Mode: TEST TEST TEST DEH-P4950MP/XU/CN5...
  • Page 29 4LOEJ 312SNS 5 V/div 5 V/div 1 V/div 4LOEJ 0FIN 5 V/div 1 V/div Black dot(800 µm) during play 12 cm CD Eject operation 8 cm CD Eject operation Ref.: Ref.: Ref.: REFO Mode: Mode: Mode: Normal Normal Normal DEH-P4950MP/XU/CN5...

  • Page 30: Pcb Connection Diagram

    For further information for respective destinations, be sure to check with the schematic dia- CORD ASSY gram. 2.Viewpoint of PCB diagrams IP-BUS INPUT Capacitor Connector SIDE A SIDE B P.C.Board Chip Part CN701 DEH-P4950MP/XU/CN5...
  • Page 31 SIDE A REAR OUTPUT FRONT OUTPUT SUBWOOFER OUTPUT ANTENNA CN1801 FRONT DEH-P4950MP/XU/CN5...
  • Page 32 TUNER AMP UNIT TEST DEH-P4950MP/XU/CN5...
  • Page 33 SIDE B >FU 353 (B,131,133) Fuse 3 A CEK1286 DEH-P4950MP/XU/CN5...

  • Page 34: Keyboard Unit

    4.2 KEYBOARD UNIT KEYBOARD UNIT SIDE A KEYBOARD UNIT SIDE B CN803 DEH-P4950MP/XU/CN5...
  • Page 35 DEH-P4950MP/XU/CN5...

  • Page 36: Cd Core Unit(S10.5Comp2)

    4.3 CD CORE UNIT(S10.5COMP2) CD CORE UNIT(S10.5COMP2) SIDE A CN701 PICKUP UNIT(P10.5)(SERVICE) LOADING /CARRIAGE MOTOR SPINDLE MOTOR DEH-P4950MP/XU/CN5...
  • Page 37 CD CORE UNIT(S10.5COMP2) SIDE B DEH-P4950MP/XU/CN5...

  • Page 38: Electrical Parts List

    (B,119,24) Transistor 2SA1036K R 102 (B,33,101) RS1/16S222J Q 842 (B,122,32) Transistor DTC114EUA R 103 (B,25,130) RS1/16S181J R 104 (B,36,135) RS1/16S101J Q 851 (B,36,13) Transistor 2SA1036K R 105 (B,33,136) RS1/16S101J Q 852 (B,30,10) Transistor DTC114EUA Q 911 (A,6,102) Transistor 2SD2396 DEH-P4950MP/XU/CN5...
  • Page 39 R 603 (B,98,84) RS1/16S103J R 935 (B,56,87) RS1/16S473J R 604 (B,120,61) RS1/16S681J R 936 (B,60,93) RS1/16S473J R 605 (B,153,61) RS1/16S681J R 937 (B,62,118) RS1/16S473J R 606 (B,114,48) RS1/16S103J R 938 (B,60,123) RS1/4SA102J R 607 (B,144,58) RS1/16S681J R 961 (B,70,36) RS1/16S102J DEH-P4950MP/XU/CN5...
  • Page 40 (B,36,122) Ceramic Resonator 5.00 MHz CSS1547 C 606 (B,81,34) CKSRYB104K25 S 1827 (A,25,41) Switch(VOLUME/SOURCE) YSD5013 C 607 (A,73,32) CEJQ100M16 C 609 (B,144,51) CCSRCH470J50 LCD1801 (A,13,63) LCD YAW5080 C 701 (B,23,47) CKSRYB473K25 C 703 (A,30,29) CEJQ101M10 RESISTORS C 704 (B,143,76) CKSRYB105K10 DEH-P4950MP/XU/CN5...
  • Page 41 C 240 (A,35,61) CKSSYB104K10 R 214 (B,36,34) RS1/16SS472J C 250 (B,36,30) CKSSYB102K50 R 216 (B,47,49) RS1/16SS472J R 221 (B,36,32) RS1/16SS103J C 251 (B,33,29) CKSSYB102K50 C 303 (A,35,19) CKSSYB472K25 R 222 (B,35,32) RS1/16SS103J C 304 (A,34,21) CKSSYB223K16 R 225 (A,49,49) RS1/16SS103J DEH-P4950MP/XU/CN5...
  • Page 42 Circuit Symbol and No. Part No. C 307 (B,25,9) CKSRYB104K16 C 308 (B,10,27) CKSRYB105K10 C 703 (B,11,37) CCSSCH101J50 C 704 (B,8,36) CKSSYB102K50 C 711 (A,25,26) CKSSYB104K10 Miscellaneous Parts List Pickup Unit(P10.5)(Service) CXX1942 Motor Unit(SPINDLE) CXC7134 Motor Unit(LOADING/CARRIAGE) CXC4026 DEH-P4950MP/XU/CN5...

  • Page 43: 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-P4950MP/XU/CN5...
  • Page 44 • When the power is turned on/off the jump mode is reset to the Single TR (91) while the gain of the RFAMP is reset to 0 dB. At the same time all the self-adjusting values shall return to the default setting. DEH-P4950MP/XU/CN5...

  • Page 45: 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-P4950MP/XU/CN5...
  • Page 46 Ech → Xch 20 mV/div, AC Grating waveform Fch → Ych 20 mV/div, AC 0° 30° 45° 60° 75° 90° DEH-P4950MP/XU/CN5...

  • Page 47: Error Mode

    Remarks: Mechanical errors are not displayed (because a CD is turned off in these errors). Unreadable TOC does not constitute an error. An intended operation continues in this case. Upper digits of an error code are subdivided as shown below: 1x: Setup relevant errors, 3x: Search relevant errors, Ax: Other errors. DEH-P4950MP/XU/CN5...

  • Page 48: System Microcomputer Test Program

    The frequency of the clock signal is 468 750 Hz that is one 32th of the fundamental frequency. The clock signal should be 468 750 Hz(- 10 Hz, + 15 Hz). If the clock signal is out of the range, the X'tal (X601) should be replaced with new one. DEH-P4950MP/XU/CN5...

  • Page 49: General Information

    Release the two latchs and then remove the Detachable Assy. Detachable Assy Fig.1 Removing the Tuner Amp Unit (Fig.2) Remove the screw. Remove the three screws. Straighten the tabs at four locations indicated and then remove the Tuner Amp Unit. Tuner Amp Unit Fig.2 DEH-P4950MP/XU/CN5...
  • Page 50 Upper Frame. 3. While lifting the Carriage Mechanism, remove it from the three Dampers. Caution: When assembling, be sure to apply some alcohol to the Dampers and assemble the mechanism in a clamped state. Damper Damper Carriage Mechanism Lower Frame DEH-P4950MP/XU/CN5...
  • Page 51 Assemble the sub unit side of the Pickup, taking the plate (Chassis) in-between. When treating the leads of the Load Carriage Motor Assy, do not make them loose over the Feed Screw. Poly Washer Change Arm Pickup Lock Arm Inner Holder Feed Screw Planet Gear Pickup Rack Chassis Pickup DEH-P4950MP/XU/CN5...

  • Page 52: Connector Function Description

    7.1.2 CONNECTOR FUNCTION DESCRIPTION DEH-P4950MP/XU/CN5...

  • Page 53: Parts

    7.2 PARTS 7.2.1 IC HA12241FP -BUS +BUS BIAS DRIVER OUTPUT (current) PAL007C RECEIVER OUTPUT R out DEH-P4950MP/XU/CN5...
  • Page 54 PML015B - Block Diagram - Pin Layout IN1_L IN1_R IN2_L IN2_R IN3_L IN3_R IN4+_L IN4+_R IN4-_R IN4-_L Front_R Front_L Rear_L Rear_R Vref DATA FIE_R FIE_L Pre/SW_R Pre/SW_L LMout PGND Pref DEH-P4950MP/XU/CN5...
  • Page 55 E.VOL clock output E.VOL data output Not used ROM correction data input/output ROMDATA ROM correction clock output ROMCK ROMCS ROM correction chip select output Not used Power supply input(+) Not used TUNER : Chip enable output(EEPROM) TUNER : Chip enable output(PLL) DEH-P4950MP/XU/CN5...
  • Page 56 A/D converter reference voltage input VREF AVCC A/D converter power supply input terminal(Connected to VCC) Not used PEG286A Format Meaning CMOS Nch open drain NJM2794V OUT1 IN1+ IN1- OUT1 IN1+ IN1- VREF Vref IN2- IN2+ OUT2 IN2- OUT2 IN2+ DEH-P4950MP/XU/CN5...
  • Page 57 Key data 4-1 output Key strobe 6-1 output 64-69 KST6-1 LCD segment output 70-100 SEG69-39 PD6538A Format Meaning CMOS Nch open drain GP1UX51RK - Block Diagram - Pin Layout Limiter B.P.F Demodulato Integrator Comparator vout GND VCC GND VCC vout DEH-P4950MP/XU/CN5...
  • Page 58 Power supply for the crystal oscillator Power supply for DAC DA.VDD Output of audio for the left channel LOUT Ground for DAC DA.GND Connected to the capacitor for band gap REGC DA.GND Ground for DAC Output of audio for the right channel ROUT DEH-P4950MP/XU/CN5...
  • Page 59 Output of reference voltage REFOUT Reversal input of FE Output of FE ADCIN FE,TE A/D converter input Reversal input of TE Output of TE Output of LD Input of PD AD.VDD Power supply for servo ADC Ground for servo ADC AD.GND DEH-P4950MP/XU/CN5...
  • Page 60 Output pin for preamplifier for thread OPINLSL Input pin for preamplifier for thread OPOUT3 CH3 preamplifier output pin OPIN3(-) Input pin for inverting input for CH3 preamplifier OPIN3(+) Input pin for non-inverting input for CH3 preamplifier PREVCC PreVcc BA5839FP DEH-P4950MP/XU/CN5...
  • Page 61 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-P4950MP/XU/CN5...

  • Page 62: Display

    7.2.2 DISPLAY - LCD(YAW5080) DEH-P4950MP/XU/CN5...

  • Page 63: Operational Flow Chart

    In case of the above signal, the communication with Grille microcomputer may fail. Source keys If the time interval is not 300 msec, the oscillator operative may be defective. Source ON SYSPW←H Pin 48 Completes power-on operation. (After that, proceed to each source operation) DEH-P4950MP/XU/CN5...

  • Page 64: Operations

    8. OPERATIONS DEH-P4950MP/XU/CN5...
  • Page 65 DEH-P4950MP/XU/CN5...
  • Page 66 (CXX2204) DEH-P4950MP/XU/CN5...
  • Page 67 - Connection Diagram DEH-P4950MP/XU/CN5...
  • Page 68 CD Mechanism Module 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 g p p DEH-P4950MP/XU/CN5...

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