Pioneer DEH-P940MP Service Manual
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Pioneer DEH-P940MP Service Manual

Multi-cd/dab control dsp high power cd/mp3/wma player with fm/am tuner
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See also: Operating Manual , Installation Manual
MULTI-CD/DAB CONTROL DSP HIGH POWER CD/MP3/WMA PLAYER WITH FM/AM TUNER
DEH-P940MP
DEH-P9400MP
DEH-P9450MP
This service manual should be used together with the following manual(s):
Model No.
Order No.
CX-3007
CRT2820
For details, refer to "Important symbols for good services".
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 2002
Mech.Module
S9MP3
CD Mech. Module:Circuit Description,Mech. Description,Disassembly
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
DEH-P940MP/UC
UC
ES
Remarks
ORDER NO.
CRT2847
UC
K-ZZS.FEB.2002.printed in Japan

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  • 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 2002 K-ZZS.FEB.2002.printed in Japan...

  • Page 2: Safety Information

    By following the instructions in this manual, be sure to apply the prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed ones should be used. DEH-P940MP/UC...

  • Page 3: Table Of Contents

    2. EXPLODED VIEWS AND PARTS LIST ......6 2.1 PACKING(DEH-P940MP,P9400MP) ......6 2.2 PACKING(DEH-P9450MP) .

  • Page 4: Specifications

    1. SPECIFICATIONS DEH-P940MP/UC...
  • Page 5 DEH-P940MP/UC...

  • Page 6: 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-P940MP,P9400MP) 23 23 34 36...
  • Page 7 PACKING(DEH-P940MP,P9400MP) SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. Carton(P940MP) CHG4675 Cord Assy CDE6563 Carton(P9400MP) CHG4673 Accessory Assy CEA2430 Screw CBA1002 Contain Box(P940MP) CHL4675 Screw Assy CEA2433 Contain Box(P9400MP) CHL4673 Handle CNC5395 Remote Control Assy...

  • Page 8: Packing(Deh-P9450Mp)

    2.2 PACKING(DEH-P9450MP) 23 23 DEH-P940MP/UC...
  • Page 9 Polyethylene Bag CEG1305 Microphone Assy CPM1054 Protector CHP2383 Spring CBH-865 Screw BMZ50P060FMC Protector CHP2384 Protector CHP2430 Screw CMZ50P060FMC Protector CHP2386 Polyethylene Bag CEG-127 Sub Carton CHA3167 Owner's Manual,Installation Manual Part No. Language CRB1754 English CRD3592 English,Spanish CRD3593 Portuguese(B),Arabic CRD3594 English,Spanish,Portuguese(B),Arabic DEH-P940MP/UC...

  • Page 10: Exterior(1)(Deh-P940Mp,P9400Mp)

    2.3 EXTERIOR(1)(DEH-P940MP,P9400MP) DEH-P940MP/UC...
  • Page 11 Grille Unit(Service) See Contrast table(2) Spring CBH2445 Cord CDE5856 Spacet CNM7959 Cord CDE5960 (2) CONTRAST TABLE DEH-P940MP/UC and DEH-P9400MP/UC are constructed the same except for the following: Mark Symbol and Description DEH-P940MP/UC DEH-P9400MP/UC Grille Unit CXB8550 CXB9470 Button Unit CXB9378 CXB9385...

  • Page 12: Exterior(2)(Deh-P940Mp,P9400Mp)

    2.4 EXTERIOR(2)(DEH-P940MP,P9400MP) DEH-P940MP/UC...
  • Page 13 EXTERIOR(2)(DEH-P940MP,P9400MP) SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. Holder CND1075 Tuner Amp Unit(P940) CWM8223 Tuner Amp Unit(P9400) CWM8224 Connector(CN701) CKS3918 Antenna Cable CDH1308 Sheet CNM7910 Cord Assy CDE6784 Chassis Unit CXB9285 Insulator CNM7773 Screw...

  • Page 14: Exterior(1)(Deh-P9450Mp)

    2.5 EXTERIOR(1)(DEH-P9450MP) DEH-P940MP/UC...
  • Page 15 CBA1154 Screw(M2x1.5) CBA1430 Screw(M1.4x4) CBA1454 Screw(M2x1.5) CBA1528 Spring CBH2445 Cord CDE5856 Cord CDE5960 Mini-Jack CKN1015 Connector CKS4436 Frame CNC8201 Spacer CNM6155 Spacer CNM6156 Spacer CNM7427 CNP5341 CNP5941 CNP6124 Guide CNV5696 Rack CNV5697 Gear CNV5698 Gear CNV5761 Gear Unit CNV5762 DEH-P940MP/UC...

  • Page 16: Exterior(2)(Deh-P9450Mp)

    2.6 EXTERIOR(2)(DEH-P9450MP) DEH-P940MP/UC...
  • Page 17 BMZ26P160FMC Holder CNC9291 IC(IC301) PAL007A Holder CNC9295 Holder CNC9296 Connector(CN1501) CKS4452 Insulator CNM7181 Plug(CN901) CKM1278 Connector(CN351) CKS3606 Clamper CEF1008 Connector(CN591) CKS4571 Plug(CN101) CKS1058 Pinjack(CN451) CKX1046 Connector(CN801) CKS1536 Plug(CN851) CKS-786 Connector(CN251) CKS4453 Plug(CN702) CKS-787 Plug(CN131) CKS-784 Holder CND1075 Connector(CN701) CKS3918 DEH-P940MP/UC...

  • Page 18: Cd Mechanism Module

    2.7 CD MECHANISM MODULE DEH-P940MP/UC...
  • Page 19 CNC8949 Guide CNV6922 CNC9661 Roller CNV6887 Spring CBH2509 CNC9016 CNC9017 Spring CBH2512 Bracket CNC9123 Spring CBH2536 Frame CNC9656 Collar CNV6906 Belt CNT1086 Connector(CN902) CKS2195 Gear CNV6886 Gear CNV6316 Gear CNV6317 Gear CNV6318 Gear CNV6319 Gear CNV6320 CNV6322 CNV6323 CNV6324 DEH-P940MP/UC...

  • Page 20: Block Diagram And Schematic Diagram

    EQ PCB DALMON Q851 OEL PW Q852 FLPPW FLAP MOTOR FLPPW M951 CONTROL CN851 AUTOMATIC Q853 ILMPW FLAP MOTOR FLPOPN FLPOPN OUT1 IC 851 FLPCLS BA6288FS OUT2 FLPCLS BLUE FCLSSW S951 FCLSSW CLOSE FOPNSW SWVDD FOPNSW SWITCH S952 OPEN WHITE DEH-P940MP/UC...
  • Page 21 12V REG (FLASH) OEL+B SWDVDD3 REGULATOR ILM+B Q806 REGULATOR SWDVDD5 KEY MATRIX SWVDD D1909–1917,1919 FLPPW SWDVDD3 OEL CONTROLLER Q807 IC 1907 ILMPW FLPOPN PD3430A Q801 FLPCLS VDD2 CN1902 FCLSSW IC 801 SWVDD 18 17 FOPNSW Q802 NJU7223DL1-33 OEL MODULE MXK8019 DEH-P940MP/UC...

  • Page 22: Overall Connection Diagram(Deh-P940Mp,P9400Mp)(Guide Page)

    3.2 OVERALL CONNECTION DIAGRAM(DEH-P940MP,P9400MP)(GUIDE PAGE) Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or "ELECTRICAL PARTS LIST". MOTOR CXM1194 R120 R118 FAN MOTOR REG. VD REG. R117 R119 IP-BUS DRIVER A-EQ EQ PCB...
  • Page 23 Therefore, when replacing, be sure to use parts of discrete resistors. are expressed as : identical designation. Symbol indicates a capacitor. ← ← No differentiation is made between chip capacitors and 0.022 R022 discrete capacitors. DEH-P940MP/UC...
  • Page 24 DEH-P940MP/UC...
  • Page 25 DEH-P940MP/UC...
  • Page 26 DEH-P940MP/UC...
  • Page 27 DEH-P940MP/UC...

  • Page 28: Overall Connection Diagram(Deh-P9450Mp)(Guide Page)

    IP-BUS DRIVER A-EQ EQ PCB CN4602 CN902 CN901 CD(analog):+0.09dBs Large size SCH diagram Guide page DSP 3.3V REG. Detailed page 2R7K 2R7K PD5750A SYSTEM CONTROLLER ANTENNA FLAP MOTOR REG. SWVD MOTOR DRIVER SWITCH M951 CN1901 AUTOMATIC FLAP MOTOR CXM1085 DEH-P940MP/UC...
  • Page 29 Therefore, when replacing, be sure to use parts of discrete resistors. are expressed as : identical designation. ← Symbol indicates a capacitor. ← No differentiation is made between chip capacitors and 0.022 R022 discrete capacitors. DEH-P940MP/UC...
  • Page 30 DEH-P940MP/UC...
  • Page 31 DEH-P940MP/UC...
  • Page 32 DEH-P940MP/UC...
  • Page 33 DEH-P940MP/UC...

  • Page 34: Dsp Unit

    3.4 DSP UNIT DSP INPUT FM(100%):-16.4dBs AM(30%):-26.9dBs IP-BUS:-4.80dBs DSP INPUT CD:-4.91dBs FILTER DSP OUTPUT FM(100%):-14.0dBs AM(30%):-24.5dBs IP-BUS:-2.40dBs CD:-2.51dBs DSP OUTPUT FILTER DEH-P940MP/UC...
  • Page 35 DSP UNIT DSP µCOM E-VOL OUTPUT FM(100%):+2.40dBs AM(30%): -8.10dBs CN251 IP-BUS: +8.0dBs CD:+7.89dBs SOURCE SELECTOR / E-VOL SELECTOR INPUT FM(100%):-20.4dBs AM(30%):-30.9dBs IP-BUS: +2.2dBs CD:+0.09dBs DEH-P940MP/UC...

  • Page 36: Keyboard Unit

    3.5 KEYBOARD UNIT COMMUNICATION LINE(KYDT, DPDT) 5V, 5V RESET SW REMOTE CONTROL SENSOR VOLUME KEY ILM DEH-P940MP/UC...
  • Page 37 OEL MODULE KEYBOARD UNIT RESET DISPLAY CONTROLLER 12V REG. (FLASH) DEH-P940MP/UC...

  • Page 38: Cd Mechanism Module(Guide Page)

    S902 : CLAMP SWITCH ON-OFF ..S903 : DSCSNS SWITCH ON-OFF ... S904 : 12EJ SWITCH ON-OFF .... S905 : 8EJ SWITCH ON-OFF The underlined indicates the switch position. 5/3.3 CD DRIVER SPINDLE MOTOR M1 CXB6007 LOADING/CARRIAGE MOTOR M2 CXB5903 +3.3V REGULATOR DEH-P940MP/UC...
  • Page 39 CD CORE UNIT (S9MP3) CN902 +2.5V REGULATOR & +3.3V REGULATOR CN901 SINGLE CD CONTROLLER DEH-P940MP/UC...
  • Page 40 DEH-P940MP/UC...
  • Page 41 DEH-P940MP/UC...
  • Page 42 CN702 DEH-P940MP/UC...
  • Page 43 CN701 DEH-P940MP/UC...
  • Page 44 5µs/div. 5ms/div. 5µs/div. 5 CH2:SIN 5 CH2:SIN 1V/div. 1V/div. Spindle waveform during "Play" RF eye pattern Spindle waveform during "Play" (Magnified) Ref. : Ref. : Ref. : REFO REFO REFO Mode : Mode : Mode : Normal Normal Normal DEH-P940MP/UC...
  • Page 45 5V/div. 2 CH2:CLCONT 5V/div. 10µs/div. 10µs/div. 3 CH3:LOEJ 5V/div. 3 CH3:LOEJ 5V/div. Analog Audio (Magnified) When "Eject" (12cm CD) When "Eject" (8cm CD) Ref. : Ref. : Ref. : AGND Mode : Mode : Mode : Normal Normal Normal DEH-P940MP/UC...

  • Page 46: Pcb Connection Diagram

    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 RCA OUT MOTOR CN1501 CN902 AUTOMATIC FLAP MOTOR M951 FRONT DEH-P940MP/UC...
  • Page 47 ANTENNA CABLE CORD ASSY SIDE A IC,Q FM/AM TUNER UNIT ANTENNA MODE IP-BUS CN901 CN1901 DEH-P940MP/UC...
  • Page 48 TUNER AMP UNIT DEH-P940MP/UC...
  • Page 49 SIDE B DEH-P940MP/UC...
  • Page 50 4.2 DSP UNIT SIDE A DSP UNIT IC,Q DEH-P940MP/UC...
  • Page 51 SIDE B DSP UNIT IC,Q CN251 DEH-P940MP/UC...
  • Page 52 4.3 KEYBOARD UNIT IC,Q KEYBOARD UNIT SIDE A DEH-P940MP/UC...
  • Page 53 IC,Q KEYBOARD UNIT SIDE B OEL MODULE CN801 DEH-P940MP/UC...

  • Page 54: Cd Core Unit(S9Mp3)

    4.4 CD CORE UNIT(S9MP3) CD CORE UNIT (S9MP3) SIDE A 12EJ DSCSNS LOADING /CARRIAGE MOTOR SPINDLE MOTOR CN701 HOME PICKUP UNIT (SERVICE)(P9MP3) CN702 REFO1 DEH-P940MP/UC...
  • Page 55 CD CORE UNIT (S9MP3) SIDE B CLAMP DEH-P940MP/UC...

  • Page 56: Eq Pcb, Switch Pcb

    4.5 EQ PCB, SWITCH PCB EQ PCB CN131 SWITCH PCB BLUE CLOSE OPEN S951 S952 WHITE CN851 DEH-P940MP/UC...

  • Page 57: Electrical Parts List

    Surge Protector RCCA-201Q43UA-PI Q 912 Transistor IMD2A L 101 Inductor LCTB3R3K2125 L 251 Inductor LAU1R0K Q 921 Transistor 2SD2375 Q 922 Transistor 2SB1238 L 252 Ferri-Inductor LAU2R2K Q 923 Transistor RT1N141C-12 L 253 Inductor CTF1531 Q 931 Transistor IMX1 DEH-P940MP/UC...
  • Page 58 R 411 RS1/16S681J R 142 RS1/16S104J R 412 RS1/16S681J R 143 RS1/16S152J R 413 RS1/16S681J R 144 RS1/16S102J R 414 RS1/16S473J R 145 RS1/16S101J R 415 RS1/16S472J R 146 RS1/16S563J R 416 RS1/16S473J R 147 RS1/16S103J R 417 RS1/16S473J DEH-P940MP/UC...
  • Page 59 C 143 CKSRYB105K10 R 801 RS1/16S222J C 144 CCSRCH101J50 R 802 RS1/16S222J C 145 CEJQNP4R7M16 R 803 RS1/16S222J C 146 CKSRYB105K10 R 804 RS1/16S103J C 147 CEJQNP4R7M16 R 805 RS1/16S222J C 148 CKSRYB105K10 R 807 RS1/16S1R0J C 149 CKSRYB104K16 DEH-P940MP/UC...
  • Page 60 C 913 CKSRYB103K50 C 354 CEJQ100M50 C 914 CEAL470M10 C 355 CEJQ100M50 C 915 470µF/16V CCH1331 C 356 CEJQ100M50 C 921 CEAT331M10 C 357 CKSRYB222K50 C 922 CKSRYB103K50 C 358 CKSRYB222K50 C 923 CEV101M16 C 359 CKSRYB222K50 C 931 CKSRYB105K10 DEH-P940MP/UC...
  • Page 61 Q 951 Transistor 2SA1235A-12 IL 801 Lamp 14V 60mA CEL1690 Q 962 Transistor 2SC3052-12 VR141 Semi-fixed 10kΩ(B) CCP1448 Q 980 Transistor IMD2A MIC141 Microphone CPM1011 Q 981 Transistor 2SC3052-12 SP641 Buzzer CPV1050 D 131 Diode MA3039(L) FM/AM Tuner Unit CWE1563 DEH-P940MP/UC...
  • Page 62 R 604 RS1/16S472J R 251 RS1/16S472J R 605 RS1/16S221J R 252 RS1/16S122J R 606 RS1/16S682J R 271 RS1/16S103J R 607 RS1/16S221J R 272 RS1/16S0R0J R 608 RS1/16S682J R 277 RS1/16S103J R 609 RS1/16S102J R 301 RS1/16S103J R 610 RS1/16S102J DEH-P940MP/UC...
  • Page 63 R 851 RAB4C102J R 852 RS1/16S102J C 253 CKSQYB225K10 R 853 RS1/16S102J C 254 CKSRYF105Z10 R 861 RS1/16S102J C 256 CCSRCH101J50 R 862 RS1/16S102J C 258 CEJQ101M6R3 C 259 CEJQ221M6R3 R 911 RS1/16S0R0J R 912 RS1/16S821J C 260 CCSRCH101J50 DEH-P940MP/UC...
  • Page 64 C 594 CKSRYB103K50 IC 301 PAL007A C 601 CCSRCH200J50 IC 601 PD5750A C 602 CCSRCH180J50 IC 801 NJU7223DL1-33 C 603 CKSRYB104K16 IC 851 BA6288FS C 605 CEJQ4R7M35 IC 961 S-80835ANUP-EDZ C 606 CKSQYB225K10 Q 101 Transistor 2SA1235A-12 C 701 CCSRCH101J50 DEH-P940MP/UC...
  • Page 65 R 112 RS1/16S102J D 814 Diode Network DA204U R 113 RS1/16S102J D 815 Diode HZS11L(A1) R 115 RS1/16S562J D 851 Diode HZS7L(C3) R 116 RS1/16S150J D 852 Diode 1SS133 R 117 RS1/16S0R0J D 853 Diode 1SS133 R 118 RS1/16S0R0J DEH-P940MP/UC...
  • Page 66 R 625 RS1/16S473J R 363 RS1/16S103J R 626 RS1/16S104J R 364 RS1/16S103J R 628 RS1/16S0R0J R 365 RS1/16S103J R 633 RS1/16S0R0J R 366 RS1/16S103J R 634 RS1/16S0R0J R 367 RS1/16S103J R 635 RS1/16S0R0J R 368 RS1/16S103J R 636 RS1/16S0R0J DEH-P940MP/UC...
  • Page 67 C 284 CKSRYB105K10 R 953 RS1/16S472J C 285 CKSRYB105K10 R 954 RS1/16S102J C 286 CKSRYB105K10 R 961 RS1/16S102J C 287 CKSRYB105K10 R 962 RS1/16S102J C 288 CKSRYB105K10 R 963 RS1/16S473J C 301 CKSRYB474K10 R 964 RS1/16S183J C 302 CKSRYB474K10 DEH-P940MP/UC...
  • Page 68 CTF1546 C 810 CEV470M6R3 C 812 CKSRYB103K50 L 202 Inductor CTF1546 C 815 CCSRCH101J50 L 204 Inductor CTF1546 C 816 CCSRCH101J50 L 701 Inductor CTF1546 L 702 Inductor LCYBR22J1608 C 818 CEJQ330M16 L 901 Inductor CTF1306 C 819 CCSRCH101J50 DEH-P940MP/UC...
  • Page 69 R 748 RS1/16SS102J R 309 RS1/16SS183J R 749 RS1/16SS102J R 310 RS1/16SS822J R 750 RS1/16SS104J R 311 RS1/16SS0R0J R 752 RS1/16SS473J R 501 RS1/16SS221J R 801 RS1/16SS104J R 502 RS1/16SS221J R 802 RS1/16SS473J R 503 RS1/16SS221J R 803 RS1/16SS273J DEH-P940MP/UC...
  • Page 70 CTF1379 C 304 CKSSYB472K25 L 1541 Inductor LCTA151J3225 C 305 CEV101M16 L 1571 Inductor CTF1389 C 306 CKSRYB224K16 L 1572 Inductor CTF1379 C 501 CKSSYB104K10 L 1573 Inductor CTF1409 C 502 CKSSYB471K50 L 1574 Inductor CTF1379 C 503 CKSSYB104K10 DEH-P940MP/UC...
  • Page 71 C 1535 CKSQYB225K10 R 1611 RS1/16S0R0J C 1537 CKSQYB225K10 R 1621 RS1/16S223J C 1539 CKSRYB105K10 R 1622 RS1/16S472J C 1540 CKSRYB105K10 R 1623 RS1/16S223J C 1541 CKSRYB105K10 R 1624 RS1/16S472J C 1542 CKSRYB105K10 R 1625 RS1/16S103J C 1543 CKSRYB105K10 DEH-P940MP/UC...
  • Page 72 L 1907 Inductor-Array CTF1421 L 1908 Inductor-Array CTF1421 C 1640 CKSQYB225K10 L 1909 Inductor-Array CTF1421 C 1641 CCSRCH221J50 C 1642 CCSRCH151J50 L 1910 Inductor-Array CTF1421 C 1643 CCSRCH151J50 L 1911 Inductor LCTC2R2K2125 C 1644 CKSQYB225K10 L 1912 Inductor CTF1530 DEH-P940MP/UC...
  • Page 73 RS1/16S473J R 1925 RS1/16S101J C 1963 CCSRCH101J50 R 1927 RS1/16S101J C 1964 CKSRYB104K16 R 1933 RAB4C102J C 1965 CKSRYB104K25 R 1934 RAB4C473J Unit Number: R 1936 RS1/16S473J R 1937 RS1/16S473J Unit Name:Switch PCB R 1938 RS1/16S473J R 1939 RS1/16S473J DEH-P940MP/UC...
  • Page 74 Circuit Symbol and No. Part Name Part No. S 951 Switch(CLOSE) CSN1012 S 952 Switch(OPEN) CSN1022 Miscellaneous Parts List Pickup Unit(Service)(P9MP3) CXX1550 Motor Unit(SPINDLE) CXB6007 CXB5903 Motor Unit(LOADING/CARRIAGE) Fan Motor CXM1194 M 951 Motor(AUTOMATIC FLAP) CXM1085 DEH-P940MP/UC...

  • Page 75: Adjustment

    - When checking the CD mechanism, adjust the position of the CD mech module by using a booster (or height adjuster) as shown below to prevent its connectors from being stretched. CD Mechanism Module Connector Booster (or height adjuster) DEH-P940MP/UC...
  • Page 76 SPDL 1X/2X switching (Double-speed compatibility only) *6) Only at the time of CRG move or 100TR jump Error rate measurement F.AGC T.AGC RF AGC F.Bias TRK/MIN/SEC Gain Gain Gain F.Mode switching/T.CLS/CRG,TR Jump switching *8) CRG motor voltage = 2 [V] DEH-P940MP/UC...

  • Page 77: 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 aver- age angle. • Hint Reloading the disc changes the clamp position and may decrease the "wobble". DEH-P940MP/UC...
  • Page 78 Ech → Xch 20mV/div, AC Grating waveform Fch → Ych 20mV/div, AC 0° 30° 45° 60° 75° 90° DEH-P940MP/UC...

  • Page 79: Test 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-P940MP/UC...

  • Page 80: Display Test Mode

    TEMP region is deleted, data is written and data is read. Examples of flash ROM writing verification results display FLASH SETUP ••• Verification of basic operations. FLASH WRITING ••• Verification of flash data writing operation. FLASH WRITING DATA ••• Verification of flash data reading operation. DEH-P940MP/UC...
  • Page 81 The Flash ROM has a limited life. The guaranteed component life is 10,000 data rewrites. If the component reaches the end of its life, it appears that an electrostatic buildup will occur and no more “0” can be written in the flash memory. DEH-P940MP/UC...

  • Page 82: General Information

    Remove the four screws. Disconnect the connector and then remove the CD Mechanism Module. CD Mechanism Module Fig.1 Removing the Panel Assy (Fig.2) Remove the four screws. Disconnect the connector and then remove the Panel Assy. Panel Assy Fig.2 DEH-P940MP/UC...
  • Page 83 2. Disconnect the connector and then remove the DSP Unit. DSP Unit 3. Remove the Upper Holder. 4. Remove the solder of tab indicated by arrow B. Lower Holder 5. Straight the four tabs indicated by arrows B and C, remove the Lower Holder. Fig.4 DEH-P940MP/UC...
  • Page 84 3. Shift the Guide Arm Assy to the left and slowly rotate Assy it to the upper direction. 4. When the Guide Arm Assy rotates approximately 45 degree, shift the Assy to the right side direction and remove it. Spring DEH-P940MP/UC...
  • Page 85 Feed Screw Guide (The pawl is located inside the guide). 3. Remove the belt from the Pulley, then remove the Pickup unit. Pulley Cover (Caution) Make sure not to stain the belt with grease when you fix the belt. Feed Screw Guide Grease Application DEH-P940MP/UC...

  • Page 86: Connector Function Description

    LOW/SUBWOOFER OUTPUT 14. FR- 15. RR+ 1. BUS+ 16. FR+ 2. GND 3. GND 4. NC 5. BUS- 6. GND 7. BUS L+ INPUT 8. ASENB IP-BUS 9. BUS R+ INPUT 10. BUS R- INPUT 11. BUS L- INPUT DEH-P940MP/UC...
  • Page 87 Clock adjustment output LOCH TUNER:Local "H" output AMfm Not used TUNER:FM stereo input TUNER:SD input DALMON For consumption low-current output currq Not used SDBW Not used RECIVE Not used drst Not used rdslk Not used Not used 51-55 Not used DEH-P940MP/UC...
  • Page 88 Signal level input VREF A/D converter standard voltage AVCC A/D converter power supply TUNPDI PLL data input *PD5750A IC's marked by * are MOS type. Be careful in handling them because they are very liable to be damaged by electrostatic induction. DEH-P940MP/UC...
  • Page 89 BA033SFP Reference voltage PAL007A sw_vcc amp_vcc sw_vcc stby 12 13 14 15 16 17 20 21 22 23 24 25 10 11 18 19 DEH-P940MP/UC...
  • Page 90 DQ13 oe : Output enable we : Write enable reset : Hardware reset DQ12 RY/by : Ready/Busy output byte : 8bit, 16bit mode select reset Vcc : Supply voltage DQ11 Vss : GND NC : Not used DQ10 RY/by DEH-P940MP/UC...
  • Page 91 *PD8093A D15/A-1 : Data output / Address input A0-A20 : Address input D0-D14 : Data output ce : Chip enable oe : Output enable byte : Mode switch Vcc : Power supply Vss : GND *S-80826ANUP-EDP VREF DEH-P940MP/UC...
  • Page 92 SONY DSP master/slave select output DSPLAT SONY DSP latch output DSPRDY SONY DSP I/F ready/busy input EMPHIN Emphasis data input 67-73 Not used NOISE ASL noise input AVSS A/D converter GND Not used VREF A/D converter reference voltage Power supply 79,80 Not used DEH-P940MP/UC...
  • Page 93 AC: 2Vr ms%0.8Vr ms CassR Bypass -gain Bypass- Selector Input -gain-adjuster SPKR1L CDL + (4-inputs independent-control) Zero-cross d etect (6ch independent control) Input-source-selector SPKR1R (4-inputs independent-control) Volume (6ch independent control) SPKR2L CDR+ Linedriv er-amplifier SPKR2R Phone+ SPKR3L Phone- SPKR3R Navi- OUTPUTREF Navi+ DEH-P940MP/UC...
  • Page 94 OEL controller pin STBY Flash memory stand by output FL12ON Flash memory protect output 91-93 KD3-1 Key data input 3-1 AVSS Key data input 0 VREF VCC3 BSDATA ROM correction data input / output Not used BSCK ROM correction clock output DEH-P940MP/UC...
  • Page 95 41,42 PVCSEL0,1 Not used TESTRAM Not used 44,45 TESTSEL0,1 Not used 46,47 PNLSEL0,1 Not used Test pin Test pin Reset input 51-56 DB0-5 Data bus input / output VCC3 3.3V power supply 59-64 DB6-11 Data bus input / output DEH-P940MP/UC...
  • Page 96 71-73 SI1-3 Serial data input1-3 Serial data input Serial bit forward clock of serial input/output data LRCK Sampling frequency clock of serial input/output data XMST Master/Slave mode select input VDD3 Digital power supply AVSP PLL GND XPLLEN PLL Enable DEH-P940MP/UC...
  • Page 97 Pin No. Pin Name Function and Operation PLCLK PLL clock output XECKSTP PLL clock output control AVDP PLL power supply VSS4 Digital GND 85-94 TD14-23 VDD4 Digital power supply AVSD DRAM GND SCLI TSDRAM AVDD DRAM power supply PDG267A *S-80835ANUP-EDZ DEH-P940MP/UC...
  • Page 98 Output pin for preamplifier for thread OPINSL 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 BA5996FM DEH-P940MP/UC...
  • Page 99 Information on error correction C1D2 Information on error correction C2D1(RMUTE) Information on error correction (mute for Rch) C2D2(LMUTE) Information on error correction (mute for Lch) C2D3 Information on error correction D.GND Ground for digital circuits Output of DRAM RAS DEH-P940MP/UC...
  • Page 100 Output of FE Reversal input of TE Output of TE A.GND Ground for the analog system LDREGO Output of REG voltage for APC Input of PD Output of LD Assignment of pickup polarity A.VDD Power supply for the analog system DEH-P940MP/UC...
  • Page 101 VCC : Power supply VSS : GND NC : No connection 32 NC 31 lcas 30 hcas ras 16 29 oe 28 A8 27 A7 26 A6 25 A5 24 A4 23 VSS *S-818A33AUC-BGN BA25BC0WFP ON/OFF ON/OFF Vref VOUT DEH-P940MP/UC...
  • Page 102 70, 71 DBBWRDY0, 1 Input of write-ready flag with WMA decoder DBBI0, 1 72, 73 DBBRRDY0, 1 Input of read-ready flag with WMA decoder DBBO0, 1 AVDD A power supply, positive supply (5V) AVSS A power supply, potential of GND DEH-P940MP/UC...
  • Page 103 Format Meaning *PE5269A C MOS *PD9023A CS : Chip select input N.C. SK : Serial clock input DI : Serial data input DO : Serial data output N.C. GND : Ground N.C. : No connection VCC : Power supply DEH-P940MP/UC...
  • Page 104 Bus direction flag from external 72,73 DBBWRDY0, 1 DBB write ready flag DBBRRDY0 DBB read ready flag VDD2 Power supply (2.5V) GND3 DBBRRDY1 DBB read ready flag GND3 RESETB Reset GND3 VDD3 Power supply (3.3V) GND3 PLLCONT PLL control GND3 DEH-P940MP/UC...
  • Page 105 LRCKI2 PCM input LRCK BCKI2 PCM input bit clock PCM input data LRCKI1 PCM input LRCK BCKI1 PCM input bit clock VDD2 Power supply (2.5V) PCM input data LRCKI0 PCM input LRCK BCKI0 PCM input bit clock GND2 *UPD61002GC DEH-P940MP/UC...
  • Page 106 Connect to the antenna through an L (LAU type) of 4.7µH.To cope with the power transmission line hums, insert a series circuit consisting of an L (a coil of about 100mH) + R (a resistor of 470 Ω to 2.2kΩ) between the GND. DEH-P940MP/UC...

  • Page 107: Operational Flow Chart

    In case of the above signal, the communication with Grille microcomputer may fail. Source keys If the time interval is not 300msec, the oscillator operative may be defective. Source ON SYSPW←H Pin 37 Completes power-on operation. (After that, proceed to each source operation) DEH-P940MP/UC...

  • Page 108: 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 Portions to be cleaned Cleaning tools Fans Cleaning paper : GED-008 DEH-P940MP/UC...

  • Page 109: Operations

    ATT button This lets you quickly lower volume level (by about 90%). Press once more to return to the original volume level. BAND button SOURCE button 2/3 buttons 5/∞ buttons VOLUME Raise or FUNCTION button AUDIO button lower the volume. DEH-P940MP/UC...
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