Pioneer CDX-P1250 Service Manual Download Page 17

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CDX-P1250

CH1: TE

0.2V/div.

CH2: TD

0.2V/div.

Normal mode: play

CH1: TE

0.5V/div.

CH2: SD

0.5V/div.

TEST mode:100Tracks jump(FWD)

5ms/div.

0.5V/div.

0.1s/div.

Normal mode: Play (12cm)

1V/div.

10ms/div.

Long Search (12cm)

EFM

1V/div.

s/div.

Normal mode: Play

CH1: TE

1V/div.

CH2: TEC

1V/div.

Test mode: Focus close

Tracking open

2ms/div.

CH1: TE

0.5V/div.

CH2: FE

0.5V/div.

Normal mode: AGC after focus close

0.2s/div.

20ms/div.

SCKO

2V/div.

s/div.

Normal mode: Play

DOUT

2V/div.

s/div.

Normal mode: Play

LRCK

2V/div.

s/div.

Normal mode: Play

5V/div.

50ms/div.

Normal mode: No disc

GND

→

REFO

→

REFO

→

GND

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

GND

→

REFO

→

GND

→

REFO

→

GND

→

REFO

→

Summary of Contents for CDX-P1250

Page 1: ...O CRT2318 MULTI COMPACT DISC PLAYER CDX P1250 X1N UC Service Manual CONTENTS 1 SAFETY INFORMATION 3 2 EXPLODED VIEWS AND PARTS LIST 4 3 SCHEMATIC DIAGRAM 12 4 PCB CONNECTION DIAGRAM 20 5 ELECTRICAL PARTS LIST 26 6 ADJUSTMENT 29 7 GENERAL INFORMATION 35 7 1 IC 35 7 2 DIAGNOSIS 40 7 2 1 DISASSEMBLY 40 7 2 2 TEST MODE 42 7 3 BLOCK DIAGRAM 48 8 OPERATIONS AND SPECIFICATIONS 50 See the separate manual ...

Page 2: ...since these screws protects the mechanism during transport be sure to affix it when it is transported for repair etc Transport screw Attach to the original position before transporting the set Seal After removing the transport screw cover the hole with the supplied seal Transportation of multi CD Player A transport screw has been attached to the set in order to protect it during transportation Aft...

Page 3: ...arts 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 1 2 CDX P1250 X1N EW 1 Safety Precautions for those who Service this Unit Follow the adjustment steps see pages 29 through 34 in the service manual when servicing this unit When check ing or adjusting the emitting power of the ...

Page 4: ...4 CDX P1250 2 EXPLODED VIEWS AND PARTS LIST 2 1 PACKING 12 11 11 12 8 9 15 19 10 7 13 5 4 3 1 6 2 14 21 20 16 ...

Page 5: ...RD2895 CRD2896 CRD2898 14 2 Owner s Manual Not used CRD2897 CRB1533 14 3 Warranty Card Not used CRY1087 Not used 14 4 Caution Card CRP1201 CRP1203 CRP1202 14 5 Caution Card CRP1205 CRP1205 CRP1205 15 Magazine Assy CXB4028 CXB4028 CXB4028 16 Angle Assy CXB3589 CXB3590 CXB3590 17 18 19 Cord CDE5831 CDE5830 CDE5831 20 Caution Card CRP1090 CRP1090 CRP1090 21 Caution Card CRP1196 CRP1196 CRP1196 Owner ...

Page 6: ...6 CDX P1250 2 2 EXTERIOR ...

Page 7: ... 2 33 CD Mechanism Module See Contrast table 2 34 Screw IMS20P035FZK 35 Screw IMS26P040FMC 36 Sheet See Contrast table 2 37 Transistor Q910 2SD2396 38 Seal See Contrast table 2 39 Caution Card CRP1196 1 EXTERIOR SECTION PARTS LIST Mark No Description Part No Mark No Description Part No Part No Mark No Symbol and Description CDX P1250 X1N UC CDX P1250 X1N EW CDX P1250 X1N ES 8 Cord CDE5831 CDE5830 ...

Page 8: ...8 CDX P1250 2 3 CD MECHANISM MODULE ...

Page 9: ... 45 Bracket CNC8355 46 Plate CNC8375 47 Cover CNC8434 48 Sheet CNM6009 49 Spacer CNM6146 50 Sheet CNM6296 51 PCB CNP5227 52 PCB CNP5228 53 Ball CNR1189 54 Gear CNR1531 55 Belt CNT1086 56 Gear CNV5472 57 Gear CNV5473 58 Rail CNV5474 59 Lever CNV5475 60 Gear CNV5477 61 Arm CNV5478 62 Holder CNV5480 63 Guide CNV5481 64 Guide CNV5482 65 Holder CNV5483 66 Holder CNV5484 67 Clamper CNV5485 68 Gear CNV54...

Page 10: ...o transistor Q851 PT4800 102 Spring Switch S851 S853 CSN1051 103 LED D851 CN504 2 104 Spring Switch S852 CSN1052 Mark No Description Part No 2 CONTRAST TABLE CDX P1250 X1N UC CDX P1250 X1N EW and CDX P1250 X1N ES are constructed the same except for the following Part No Mark No Symbol and Description CDX P1250 X1N UC CDX P1250 X1N EW CDX P1250 X1N ES 2 CD Core Unit C8 CWX2262 CWX2263 CWX2262 ...

Page 11: ...11 CDX P1250 2 4 MAGAZINE ASSY 1 Magazine Assy CXB4028 2 Tray CNV5341 3 Label CRW1396 MAGAZINE ASSY SECTION PARTS LIST Mark No Description Part No ...

Page 12: ...rts be sure to refer to EXPLODED VIEWS AND PARTS LIST or ELECTRICAL PARTS LIST M853 CXB3005 M852 CXB3006 M851 CXB3003 M854 CXB3004 PICKUP UNIT SERVICE CXX1285 CSN1051 CSN1051 CSN1052 CN504 2 PT4800 10k 680 B C MECHANISM PCB D SWITCH PCB E MOTOR PCB MOT 4CH SERVO DRIV RF A DSP 1 12 6 8 13 21 1 4 CN801 CN802 C D E A1 2 ...

Page 13: ...13 CDX P1250 5 6 7 8 5 6 7 8 D C B A A CD CORE UNIT A 2 2 MOTOR DRIVER DRIVER RF AMP SERVO DSP DAC 18 7 2 5 19 20 15 17 16 12 3 9 11 10 EWmodel UC ES model A1 2 ...

Page 14: ...14 CDX P1250 1 2 3 4 1 2 3 4 D C B A A2 2 A 1 2 SYSTEM CONTROLLER EWmodel UC ESmodel ...

Page 15: ...15 CDX P1250 5 6 7 8 5 6 7 8 D C B A A2 2 GGC1257 SRM2B256SLTMX70 B CN911 LER SRAM IP BUS DRIVER POWER UNIT EWmodel UC ESmodel ...

Page 16: ...iv 9 CH2 TD 0 5V div Test mode 32 tracks jump REV 0 5ms div 8 CH1 TE 0 5V div 9 CH2 TD 0 5V div Test mode Single jump REV 0 5ms div 8 CH1 TE 0 5V div 9 CH2 TD 0 5V div Test mode 100 tracks jump REV 5ms div 6 CH1 FE 0 1V div 3 CH2 FD 0 2V div Normal mode Play 20ms div 3 CH1 FD 0 5V div 0 CH2 MD 1V div Normal mode Focus close 12cm 0 5s div 3 CH1 FD 0 5V div 0 CH2 MD 1V div Normal mode Focus close 8c...

Page 17: ...v 5µs div Normal mode Play 8 CH1 TE 1V div CH2 TEC 1V div Test mode Focus close Tracking open 2ms div 8 CH1 TE 0 5V div 6 CH2 FE 0 5V div Normal mode AGC after focus close 0 2s div 20ms div SCKO 2V div 1µs div Normal mode Play DOUT 2V div 10µs div Normal mode Play LRCK 2V div 20µs div Normal mode Play VD 5V div 50ms div Normal mode No disc GND REFO REFO GND REFO REFO REFO REFO REFO REFO REFO REFO ...

Page 18: ...5V div Normal mode During AGC 1 CH1 RFI 1V div CH2 HOLD 5V div Normal mode The defect part passes 800µm B D 500µs div 1ms div 0 5ms div 3 CH1 FD 1V div CH2 HOLD 5V div Normal mode The defect part passes 800µm B D 0 5ms div 9 CH1 TD 0 1V div CH2 HOLD 5V div Normal mode The defect part passes 800µm B D 0 5ms div REFO REFO REFO REFO REFO REFO REFO REFO REFO REFO REFO REFO ...

Page 19: ...19 CDX P1250 1 2 3 4 1 2 3 4 D C B A B 3 2 POWER UNIT 470 16 470 16 1SR139 400 CTH1047 1mH 1SR139 400 220000 5R5 HZS6L B1 MUTE 8V REG CEK1018 Yellow B A ...

Page 20: ...CDX P1250 1 2 3 4 1 2 3 4 D C B A A SIDE A CD CORE UNIT A NOTE FOR PCB DIAGRAMS 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 dia gram CN911 B C CN801 ...

Page 21: ...RESET EJECT MAG 21 CDX P1250 D C B A 1 2 3 4 1 2 3 4 A SIDE B CD CORE UNIT A Capacitor Connector P C Board Chip Part SIDE A SIDE B 2 Viewpoint of PCB diagrams ...

Page 22: ...22 CDX P1250 1 2 3 4 1 2 3 4 D C B A SIDE A B POWER UNIT B CN701 A CORD 4 2 POWER UNIT IP BUS ...

Page 23: ...23 CDX P1250 D C B A 1 2 3 4 1 2 3 4 B POWER UNIT B SIDE B ...

Page 24: ...24 CDX P1250 1 2 3 4 1 2 3 4 D C B A D 4 4 SWITCH PCB SWITCH PCB D C C 4 3 MECHANISM PCB A CN101 E D MECHANISM PCB C M M854 CRG M M851 SPDL HOME TRP DSP D851 PICKUP UNIT SERVICE ...

Page 25: ...25 CDX P1250 D C B A 1 2 3 4 1 2 3 4 E 4 5 MOTOR PCB MOTOR PCB E C ...

Page 26: ...1J R 259 RS1 16S102J R 260 RS1 16S681J R 298 RS1 16S681J R 301 RS1 16S103J R 302 RS1 16S153J R 303 RS1 16S103J R 304 RS1 16S153J R 305 RS1 16S103J R 306 RS1 16S752J R 307 RS1 16S103J R 308 RS1 16S752J R 309 RA4C332J R 311 RS1 16S102J R 501 RS1 16S102J R 651 RSK1 16S153J R 652 RSK1 16S153J R 653 RSK1 16S153J R 654 RSK1 16S153J R 659 RSK1 16S123J R 660 RSK1 16S123J R 661 RSK1 16S123J R 662 RSK1 16S1...

Page 27: ...0V CCH1300 C 273 CKSQYB334K16 C 301 CEV101M10 C 302 CKSQYB224K16 C 501 EW model CKSQYB104K25 C 502 EW model CKSRYB471K50 C 651 CCSRCH391J50 C 652 CCSRCH391J50 C 653 CCSRCH181J50 C 654 CCSRCH181J50 C 655 CCSRCH181J50 C 656 CCSRCH181J50 C 661 CKSQYB104K25 C 664 CKSRYB103K25 C 665 CEV470M6R3 C 666 CKSRYB103K25 C 701 CKSRYB103K25 C 702 CKSQYB473K16 C 703 CKSQYB473K16 C 707 CKSRYB103K25 C 708 CKSQYB104...

Page 28: ... Unit Number Unit Name Mechanism PCB Q 851 Photo transistor PT4800 S 853 Spring Switch HOME CSN1051 Unit Number Unit Name Switch PCB D 851 LED CN504 2 S 851 Spring Switch DSP CSN1051 S 852 Spring Switch TAP CSN1052 Unit Number Unit Name Motor PCB M 853 Motor TRAY CXB3005 Miscellaneous Parts List Pickup Unit P8 Service CXX1285 M 851 Motor SPINDLE CXB3003 M 852 Motor ELV CXB3006 M 854 Motor CARRIAGE...

Page 29: ... buttons move the pickup unit to the innermost track 3 Press key 9 to close focus the display should read 91 Press key 9 2 times Enter Rough Servo mode Press key 8 to implement the tracking balance adjustment the display should now read 81 4 As shown in the diagram above monitor the LPF outputs using the oscilloscope and check that the phase differ ence is within 75 Refer to the photographs suppli...

Page 30: ...30 CDX P1250 Grating waveform 45 0 75 60 30 90 Echt Xch 20mV div AC Fcht Ych 20mV div AC ...

Page 31: ...loscope One L P F Measuring Points EREF EPVO Setting Without a magazine in Test mode With the mechanism placed upside down Place the CD mechanism module so that the CD core unit is above Confirmation Procedure 1 Enter Test mode then select Multi CD player 2 Press key 7 to enter Mechanism Test mode 3 Press key 12 twice to specify the amount of movement 6 2 ADJUSTMENT OF ELEVATION WHEN THE CD CORE U...

Page 32: ... CD core unit below Take care not to short cir cuit the PCB 11 Confirm the height of the stage Use the DISC key to select Disc No 6 Check if the stopper bend of the clamp lever is engaged in the groove of the frame stopper Fig 2 4 Note The stopper bend will be pressed downward into the groove for final clamping Confirm the engagement position of the stopper bend If the stopper bend is engaged in t...

Page 33: ...the volt age of EREF adjusted in step 8 by 10 mV 13 Place the mechanism horizontal Go back to step 11 to reconfirm the stage height 14 When adjustment of the stage height is completed proceed as fol lows 15 Press the EJECT switch 16 Once operation of the mechanism has stopped turn the power OFF 17 Wait more than one minute after the power is turned off then turn the power ON and insert a magazine ...

Page 34: ...mp lever Frame stopper OK Engaged in the center and pressed downward NG Fig 1 Dislocated toward the first CD Adjust the insertion gate of magazine to the sixth scale Dislocated toward the twelfth CD Fig 2 Fig 3 Fig 4 E 1 2 3 4 6 5 7 8 9 B C ...

Page 35: ...sub Q code 28 FLAG O Flag output pin to indicate that audio data currently being output consists of noncorrectable data 29 DIN I Serial data input to internal DAC 30 DOUT O Serial audio data output 31 SCKIN I Serial clock input to internal DAC 32 SCKO O Audio data that is output from DOUT changes at rising edge of this clock 33 LRCKIN I LRCK signal input to internal DAC 34 LRCK O Signals to distin...

Page 36: ... regulation 75 AGCO O RF signal output of after gain adjustment 76 AGCI I RF AGC amplifier input 77 RFO O RF summing amplifier output 78 EQ2 RF amplifier equalizer parts additional pin 79 EQ1 RF amplifier equalizer parts additional pin 80 RF I RF summing amplifier inverted input 81 A GND Analog circuit GND 82 A I Photo detector A input 83 C I Photo detector C input 84 B I Photo detector B input 85...

Page 37: ...y electrostatic induction BA05FP Reference voltage Vcc GND OUT 1 2 3 VCC 28 27 26 25 PreVcc OPIN4 OPIN4 OPOUT4 24 23 22 OPIN3 OPIN3 OPOUT3 21 20 19 18 GND STBY PowVcc VO3 17 16 15 VO3 VO4 VO4 1 2 3 4 BIAS IN OPIN1 OPIN1 OPOUT1 5 6 7 OPIN2 OPIN2 OPOUT2 8 9 10 11 GND MUTE PowVcc VO2 12 13 14 VO2 VO1 VO1 Stand by Mute Level shift Level shift Level shift Level shift BA5986FM ...

Page 38: ...W I When there is SRAM H 26 CCS O C IP BUS chip select 27 28 NC Not used 29 IPIN I Data input from IP BUS interface IC 30 IPOUT O C Data output for IP BUS interface IC 31 32 NC Not used 33 FMIPSW I FM IP BUS select switch 34 testin I Test program mode input 35 XSO O NM LSI data output 36 XSI I LSI data input 37 XSCK O NM LSI clock output 38 M6M12 I 6 12 disc select input 39 43 NC Not used 44 rd O ...

Page 39: ...er control output 79 I2 O C Motor driver control output 80 I4 O C Motor driver control output 81 88 D0 D7 I O C SRAM data bus 89 90 NC Not used 91 DSP I DISC detect timing input 92 disk I Disc detector input 93 ELVPVO I Voltage input from ELV position sense 94 ELVREF I ELV reference voltage input 95 TRP I Tray position input 96 AVSS I A D GND 97 VDIN Power supply short sensor input 98 VREF I A D c...

Page 40: ...e Upper Case Removing the CD Mechanism Module Remove the four dampers Fig 5 Disconnect the connector Fig 5 Remove the two springs Fig 5 Disconnect the connector and then remove the CD Mechanism Module Fig 6 Removing the Grille Unit not shown 1 Press the two tabs indicated by arrows and then pull out the Grille Unit Fig 7 CD Mechanism Module Fig 5 Fig 6 7 2 DIAGNOSIS 7 2 1 DISASSEMBLY Power Unit ...

Page 41: ...e make sure that the flexible tray motor printed circuit board and flexible relay card are not pulled exces sively 6 Remove screw A and then remove the carriage motor assy lighting conductor feed screw holder feed screw and belt see Fig 9 7 Remove screw B on the main side and the pickup unit together with the guide shaft see Fig 9 Fig 8 Flexible card Erect Flexible relay card han dle with care Fle...

Page 42: ...em when making adjustment Disc detection during tray extraction and return oper ations is performed by means of the photo transistor in this unit Consequently if the inside of the unit is exposed to a strong light source with the outer casing removed for repairs or adjustment the following mal functions may occur Even with a disc loaded the unit detects no disc and cannot start play Although a 12 ...

Page 43: ...isplay T Close and F T AGC and RF AGC and Fit Servo Display Power ON Not adjustment for T Offset Display Display 8 RF AMP Gain Select 8 Power OFF Power OFF Power OFF 8x 8x 8x TRK SEC MIN 9x 9x 9x TRK SEC MIN 8x 8x 8x TRK SEC MIN 9x 9x 9x TRK SEC MIN or 8x 8x 8x TRK SEC MIN 9x 9x 9x TRK SEC MIN or 00 00 00 TRK SEC MIN 99 99 99 TRK SEC MIN or 00 00 00 TRK SEC MIN 99 99 99 TRK SEC MIN or 00 00 00 TRK...

Page 44: ... inner diameter CRG can t be moved from inner diameter Failure on home switch or CRG move mechanism 11 Electricity Focus Servo NG Focusing not available Stains on rear side of disc or excessive vibrations on REWRITABLE 12 Electricity Spindle Lock NG Spindle not locked Sub code is strange not readable Failure on spindle stains or damages on disc or excessive vibrations Subcode NG A disc not contain...

Page 45: ...ouble analysis 1 Shifting to the New Test Mode 1 Turn on the current test mode by starting the reset from the 4 and 6 keys together 2 Select M CD for the source through the specified procedure including use of the SOURCE key Then press the 12 key while maintaining the regulator turned off 3 After the above operations the new test mode remains on irrespective of whether the M CD is turned on or off...

Page 46: ...tup Status No Contents Protective action 00 CD 5V ON process in progress None 01 Servo LSI initialization 1 3 in progress None 02 Servo LSI CRAM initialization in progress None 03 Servo LSI initialization 2 3 in progress None 04 Offset adjustment 1 3 in progress None 05 Offset adjustment 2 3 in progress None 06 Offset adjustment 3 3 in progress None 07 FZD adjustment in progress None 08 Servo LSI ...

Page 47: ...s closed Off focus Carriage closing in progress 41 Focus tracking AGC started Off focus 42 Focus AGC started Off focus 43 Focus AGC in progress Off focus 44 Tracking AGC in progress Off focus 45 Standing by after focus tracking AGC are over Off focus 46 Spindle processes applicable servo Off focus 47 Check for servo close is started Off focus 48 Check of LOCK pin started Off focus or spindle not l...

Page 48: ...48 CDX P1250 7 3 BLOCK DIAGRAM A C D E ...

Page 49: ...49 CDX P1250 B ...

Page 50: ... switch is set to the ON or ACC position the CD title display and ITS memory are cleared Clear button 8 2 SPECIFICATIONS General System Compact disc audio system Usable discs Compact Disc Signal format Sampling frequency 44 1 kHz Number of quantization bits 16 linear Power source 14 4 V DC 10 8 15 1 V allowable Max current consumption 1 0 A Weight 2 2 kg 4 9 lbs Dimensions 257 W 94 H 172 D mm 10 1...

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