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Pioneer DEH-1850 Service Manual
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Pioneer DEH-1850 Service Manual

Pioneer DEH-1850 Service Manual

High power cd player with fm/am tuner
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See also: Operating Manual , Installation Manual
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3 7 63 1515 0
HIGH POWER CD PLAYER WITH FM/AM TUNER
DEH-1850
This service manual should be used together with the following manual(s):
Model No.
CX-3166
CRT3582
TE
L 13942296513
www
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 2005
http://www.xiaoyu163.com
Order No.
Mech. Module
S10.5STD
x
ao
u163
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i
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
http://www.xiaoyu163.com
2 9
8
DEH-1850/XN/ES
CD Mech. Module : Circuit Descriptions, Mech. Descriptions, Disassembly
Q Q
3
6 7
1 3
1 5
co
.
9 4
2 8
ORDER NO.
CRT3552
/XN/ES
Remarks
0 5
8
2 9
9 4
2 8
m
K-ZZA. NOV. 2005 Printed in Japan
9 9
9 9

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Summary of Contents for Pioneer DEH-1850

  • 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-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. L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • 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. u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 4: Table Of Contents

    7.1 DIAGNOSIS ............................. 44 7.1.1 DISASSEMBLY ............................. 44 7.1.2 CONNECTOR FUNCTION DESCRIPTION ..................47 7.2 PARTS..............................48 7.2.1 IC ................................48 7.2.2 DISPLAY ............................... 56 7.3 OPERATIONAL FLOW CHART ....................... 57 8. OPERATIONS ..............................58 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 5: Specifications

    1. SPECIFICATIONS 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • 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 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 7 16-3 Caution Card CRP1310 Polyethylene Bag CEG-158 Cord Assy XDE7008 Handle CNC5395 Case Assy CXB3520 Bush CNV3930 Owner's Manual,Installation Manual Part No. Language CRD4039 English, Spanish, Portuguese(B), Traditional Chinese, Arabic CRD4030 English, Spanish, Portuguese(B), Traditional Chinese, Arabic L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 8: Exterior

    2.2 EXTERIOR 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 9 CNM6276 Panel CNS8404 CNV4692 CNV4728 CNV5576 Screw IMS20P030FTB Detach Grille Assy CXC5235 Screw BPZ20P100FTB Button(DETACH) CAC9382 Button(VOLUME(+/ -)) CAC9384 Button(CLOCK,1-6,LOCAL/BSM,AUDIO) CAC9385 Button(<, >EJECT) CAC9389 Panel CNS8389 Button(EQ,LOUDNESS) CAC9390 Button(SOURCE,BAND) CAC9383 u163 Spring CBH2210 Cover CNS8367 CAW1905 Connector(CN1801) CKS3580 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 10: Cd Mechanism Module

    2.3 CD MECHANISM MODULE 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 11 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 CNV7218 Gear CNV7219 u163 Guide CNV7361 Gear CNV7595 Guide CNV7799 CNV7805 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 12: Block Diagram And Schematic Diagram

    VO3(-) PA5/CLCONT CDMUTE VO3(+) PC7/CDMUTE LDIN PA6/LOEJ VO4(-) LOAD/ CARRIAGE BRST,BRXEN,BSRQ BRST,BRXEN,BSRQ MOTOR VO4(+) MUTE PA4/CONT BDATA,BSCK BDATA,BSCK CD VD Q991 B.UP Q992 PA1/12SNS PA2/8SNS PA3/DSCSNS VDCONT VDCONT PA0/HOME PB1/VDCONT S904 S905 S901 12EJ HOME S903 DSCSNS u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 13: Http://Www.xiaoyu163.Com 6 8 7

    Q821 4ch/RDM LEFT DOWN RIGHT B.UP S1818 S1819 S1826 S1838 S1829 S1827 S1820 Q822 AUDIO EJECT BAND DISP/LOUD ILMPW u163 KEY DATA X1801 5MHz DPDT DPDT DPDT DPDT LCD DRIVER/ KEY CONTROLLER KYDT KYDT KYDT KYDT IC1801 PD6340A DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 14: Overall Connection Diagram(Guide Page)

    No differentiation is made between chip capacitors and ← 0.022 R022 discrete capacitors. u163 The > mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 15 3 7 63 1515 0 TUNER AMP UNIT > L 13942296513 CEK1208 10A > 600 H STRKEY2 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 16 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 17 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 18 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 19 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 20: Keyboard Unit

    3.3 KEYBOARD UNIT 3 7 63 1515 0 KEYBOARD UNIT L 13942296513 LCD DRIVER u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 21 3 7 63 1515 0 CN831 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 22: Cd Mechanism Module

    3 7 63 1515 0 CD CORE UNIT(S10.5) PICKUP UNIT(P10.5)(SERVICE) L 13942296513 M1 CXC6742 SPINDLE MOTOR M2 CXC4026 LOADING/CARRIAGE MOTOR SWITCHES: CD CORE UNIT(S10.5) S901:HOME SWITCH..ON-OFF S903:DSCSNS SWITCH..ON-OFF CD DRIVER S904:12EJ SWITCH.....ON-OFF S905:8EJ SWITCH....ON-OFF The underlined indicates the switch position. u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 23 3 7 63 1515 0 SIGNAL LINE FOCUS SERVO LINE TRACKING SERVO LINE CARRIAGE SERVO LINE SPINDLE SERVO LINE CD DSP L 13942296513 CN651 & u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 24 # FE % RFAGC @ TE 500 mV/div 500 mV/div 500 mV/div 9 TIN 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 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 25 5 V/div 1 V/div 4 LOEJ 0 FIN 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 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 26: Pcb Connection Diagram

    For further information for CORD ASSY respective destinations, be sure to check with the schematic dia- gram. 2.Viewpoint of PCB diagrams Capacitor Connector SIDE A SIDE B Chip Part P.C.Board L 13942296513 CN651 CN702 u163 CN1801 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 27 3 7 63 1515 0 SIDE A REAR OUTPUT ANTENNA JACK L 13942296513 u163 FRONT DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 28 3 7 63 1515 0 TUNER AMP UNIT L 13942296513 IC151 TEST u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 29 3 7 63 1515 0 SIDE B L 13942296513 IC963 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 30: Keyboard Unit

    4.2 KEYBOARD UNIT 3 7 63 1515 0 SIDE B SIDE A KEYBOARD UNIT KEYBOARD UNIT R1815 R1814 R1813 R1812 L 13942296513 CN831 D1810 R1808 R1809 R1807 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 31 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 32: Cd Core Unit(S10.5)

    4.3 CD CORE UNIT(S10.5) 3 7 63 1515 0 SIDE A CD CORE UNIT(S10.5) PICKUP UNIT(P10.5)(SERVICE) CN651 REFO1 L 13942296513 HOME CN702 IC301 LOADING /CARRIAGE MOTOR SPINDLE MOTOR u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 33 3 7 63 1515 0 SIDE B CD CORE UNIT(S10.5) 12EJ Q101 DSCSNS C709 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 34: Electrical Parts List

    (B,111,61) RS1/16S104J R 607 (B,107,61) RS1/16S222J D 901 (A,35,131) Diode MPG06G-6415G3 R 608 (B,106,74) RS1/16S0R0J D 902 (A,35,128) Diode MPG06G-6415G3 R 609 (B,102,43) RS1/16S473J D 911 (A,21,106) Diode MPG06G-6415G3 R 610 (B,99,52) RS1/16S681J D 912 (A,18,120) Diode HZS6L(B2) DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 35 (A,28,29) LED SML-310PT C 302 (B,128,111) CKSQYB474K16 C 303 (B,131,122) CKSQYB474K16 D 1807 (A,43,39) LED SML-310PT D 1808 (A,43,55) LED SML-310PT C 304 (B,123,107) CKSQYB474K16 D 1809 (A,28,42) LED SML-310PT C 305 (B,119,113) CKSRYB474K10 D 1810 (A,29,50) LED NESW505C-5273 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 36 (B,20,30) RS1/16SS473J C 236 (B,43,58) CKSSYB104K10 C 238 (A,39,70) CKSRYB104K16 R 108 (B,63,68) RS1/16SS105J C 240 (A,39,68) CKSRYB104K16 R 109 (B,49,64) RS1/16SS102J C 304 (A,40,24) CKSSYB472K25 R 214 (A,48,45) RS1/16SS332J C 305 (A,41,26) CKSSYB103K16 R 215 (A,47,44) RS1/16SS183J DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 37 Circuit Symbol and No. Part No. 3 7 63 1515 0 C 306 (A,26,14) CKSRYB105K10 C 705 (B,14,39) CCSSCH101J50 C 710 (B,15,37) CKSSYB102K50 Miscellaneous Parts List Pickup Unit(P10.5)(Service) CXX1942 Motor Unit(SPINDLE) CXC6742 Motor Unit(LOADING/CARRIAGE) CXC4026 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 38: Adjustment

    • 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. u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 39 • 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-1850/XN/ES http://www.xiaoyu163.com...

  • Page 40: 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 u163 Reloading the disc changes the clamp position and may decrease the "wobble". DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 41 Ech → Xch 20mV/div, AC Grating waveform 3 7 63 1515 0 Fch → Ych 20mV/div, AC 0° 30° 45° 60° L 13942296513 75° 90° u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 42: 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. u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 43: System Microcomputer Test Program

    The frequency of the clock signal is 786.432 kHz that is one 16th of the fundamental frequency. The clock signal should be 786.432 kHz ± 31.5 Hz. If the clock signal is out of the range, the X'tal (X601) should be replaced with new one. L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 44: General Information

    Grille Assy. Fig.1 Grille Assy L 13942296513 Removing the Tuner Amp Unit (Fig.2) Remove the screw. Remove the three screws. Straighten the tabs at three locations indicated and then remove the Tuner Amp Unit. u163 Tuner Amp Unit Fig.2 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 45 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. L 13942296513 Damper Damper Carriage Mechanism Lower Frame u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 46 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. L 13942296513 Poly Washer Change Arm Pickup Lock Arm Inner Holder Feed Screw Planet Gear Pickup Rack Chassis Pickup u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 47: Connector Function Description

    7.1.2 CONNECTOR FUNCTION DESCRIPTION 3 7 63 1515 0 Pin No. Pin No. B.UP L 13942296513 B.REMOTE u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 48: Parts

    RDS LK input RDS clock input RDSLK RDS 57K input RDS57K Reset RESET PLL lock detection input LDET RDS clock input asens ACC sense input bsens Back up sense input dsens Grille detach sense input source Source sense input u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 49 Be careful in handling them because they are very liable to be damaged by electrostatic induction. L 13942296513 PAL007B sw_vcc amp_vcc sw_vcc stby 12 13 14 15 16 17 20 21 22 23 24 25 10 11 18 19 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 50 PML014A 3 7 63 1515 0 - Block Diagram - Pin Layout IN1_L IN1_R IN2_L IN2_R IN3_R IN3_L IN4+_L IN4+_R IN4-_L IN4-_R Front_L Front_R Rear_L Rear_R Vref DATA L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 51 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 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 52 IO.GND IO.VDD Power supply for the digital port Focus drive output (PWM) Tracking drive Sled drive Motor drive output (PWM) Test TEST Ground for the A/D converter AD.GND Power supply for the A/D converter AD.VDD EFM signal u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 53 Impedance connection to focus error amp for negative feedback Focus error amp output A/D converter input ADCIN Impedance connection to tracking error amp for negative feedback Tracking error amp output Tracking error amp output multiplied by two Tracking error comparator * PE5497B L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 54 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 L 13942296513 BA5839FP u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 55 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 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 56: Display

    7.2.2 DISPLAY 3 7 63 1515 0 - LCD(CAW1905) L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 57: 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 300 msec, the oscillator may be defective. Source ON SYSPW←H Pin 43 Completes power-on operation.(After that, proceed to each source operation.) u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

  • Page 58: Operations

    8. OPERATIONS 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 59 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 (CXX1982) Fixing screw (CXX1982) L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 60 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 61 3 7 63 1515 0 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...
  • Page 62 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 L 13942296513 u163 DEH-1850/XN/ES http://www.xiaoyu163.com...

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