Pioneer KEH-1900R Service Manual
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Pioneer KEH-1900R Service Manual

Pioneer KEH-1900R Service Manual

High power cassette player with rds tuner
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Table of Contents

See also: Operating Manual
Service
Manual
HIGH POWER CASSETTE PLAYER WITH RDS TUNER
KEH-1900R
KEH-1930R
NOTE:
- See the separate manual CX-644(CRT1800) for the cassette mechanism description.
- The cassette mechanism assy employed in this model is one of 2M series.
CONTENTS
1. SAFETY INFORMATION............................................2
2. EXPLODED VIEWS AND PARTS LIST ......................2
4. PCB CONNECTION DIAGRAM................................18
5. ELECTRICAL PARTS LIST........................................26
6. ADJUSTMENT .........................................................31
PIONEER ELECTRONIC CORPORATION
PIONEER ELECTRONICS SERVICE INC.
PIONEER ELECTRONIC [EUROPE] N.V.
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER ELECTRONIC CORPORATION 1999
KEH-1900R/X1M/EW
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
X1M/EW
7. GENERAL INFORMATION.......................................33
7.1 PARTS ................................................................33
7.1.1 IC ...............................................................33
7.1.2 DISPLAY ...................................................36
7.2 DISASSEMBLY ..................................................37
8. OPERATIONS AND SPECIFICATIONS ....................38
K-ZZB. MAR. 1999 Printed in Japan
ORDER NO.
CRT2267
X1M/EW

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Summary of Contents for Pioneer KEH-1900R

  • Page 1: Table Of Contents

    PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936 C PIONEER ELECTRONIC CORPORATION 1999 K-ZZB. MAR. 1999 Printed in Japan...

  • Page 2: Safety Information

    KEH-1900R,1930R 1. SAFETY INFORMATION CAUTION This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual.
  • Page 3 KEH-1900R,1930R NOTE: - Parts marked by “*” are generally unavailable because they are not in our Master Spare Parts List. - Screws adjacent to mark on the product are used for disassembly. - PACKING SECTION PARTS LIST Part.No Mark No. Description...
  • Page 4 KEH-1900R,1930R 2.2 EXTERIOR...
  • Page 5 KEH-1900R,1930R (1) EXTERIOR SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BSZ26P050FMC 41 Panel Unit See Contrast table(2) 2 Screw BSZ30P100FMC 42 Door See Contrast table(2) 3 Cord Assy CDE5807 43 Spring CBH1838...
  • Page 6 KEH-1900R,1930R (2) CONTRAST TABLE KEH-1900R/X1M/EW and KEH-1930R/X1M/EW are constructed the same except for the following: Part No. Mark No. Description KEH-1900R/X1M/EW KEH-1930R/X1M/EW Chassis Unit CXB3224 CXB3225 Panel Unit CXB3714 CXB3716 Door CAT2028 CAT2037 Panel CNS5211 CNS5212 Detach Grille Assy CXB3376...
  • Page 7 KEH-1900R,1930R 2.3 CASSETTE MECHANISM ASSY...
  • Page 8 KEH-1900R,1930R - CASSETTE MECHANISM ASSY SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BSZ23P050FMC 46 Gear ENV1475 2 Washer CBG1003 47 Gear ENV1512 3 Connector(CN1) CKS2829 48 Gear ENV1513 4 Screw(M2x5) EBA1038 49 Gear ENV1502 5 Screw(M2x2.5)

  • Page 9: Block Diagram And Schematic Diagram

    KEH-1900R,1930R 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM - KEH-1900R/X1M/EW...
  • Page 10 KEH-1900R,1930R 3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS LIST”. Large size FM/AM TUNER UNIT SCH diagram Guide page Detailed page CASSETTE TAPE:-24dBs...
  • Page 11 KEH-1900R,1930R TUNER AMP UNIT TAPE:-25dBs TAPE:-25dBs FM:+9dBs MW/LW:-1dBs TAPE:+22dBs BACK IL901~904: CEL1547(KEH-1900R/X1M/EW) : CEL1479(KEH-1930R/X1M/EW) KEYBOARD UNIT...
  • Page 12 KEH-1900R,1930R...
  • Page 13 KEH-1900R,1930R...
  • Page 14 KEH-1900R,1930R...
  • Page 15 KEH-1900R,1930R...
  • Page 16 KEH-1900R,1930R 3.3 FM/AM TUNER UNIT FM/AM TUNE...
  • Page 17 KEH-1900R,1930R TUNER UNIT...

  • Page 18: Pcb Connection Diagram

    KEH-1900R,1930R 4. PCB CONNECTION DIAGRAM CORD ASSY 4.1 TUNER AMP UNIT 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 diagram.
  • Page 19 KEH-1900R,1930R SIDE A IP-BUS...
  • Page 20 KEH-1900R,1930R TUNER AMP UNIT...
  • Page 21 KEH-1900R,1930R SIDE B...
  • Page 22 KEH-1900R,1930R 4.2 FM/AM TUNER UNIT SIDE A...
  • Page 23 KEH-1900R,1930R SIDE B...
  • Page 24 KEH-1900R,1930R 4.3 KEYBOARD UNIT SIDE B SIDE A...
  • Page 25 KEH-1900R,1930R 4.4 CASSETTE MECHANISM PCB CASSETTE PCB EJECT SW LOAD SW MOTOR FWD/REV PB HEAD MUTE SW 5 7 9 FWD/REV SW 8 10 CN604...

  • Page 26: Electrical Parts List

    KEH-1900R,1930R 5. ELECTRICAL PARTS LIST NOTE: - Parts whose parts numbers are omitted are subject to being not supplied. - The part numbers shown below indicate chip components. Chip Resistor RS1/_S___J,RS1/__S___J Chip Capacitor (except for CQS..) CKS.., CCS.., CSZS..=====Circuit Symbol and No.===Part Name Part No.
  • Page 27 KEH-1900R,1930R =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RD1/4PU102J RD1/4PU102J RD1/4PU0R0J RD1/4PU102J RS1/10S561J RS1/8S102J RS1/10S103J RD1/4PU102J RS1/8S393J RS1/10S102J RD1/4PU562J RS1/10S0R0J RD1/4PU472J RS1/10S333J RD1/4PU473J RS1/10S102J RS1/10S473J RS1/10S562J RD1/4PU104J...
  • Page 28 CKSQYB473K50 CKSQYB103K50 CEJA101M10 CKSQYB473K50 CKSQYB103K50 CKSQYB102K50 330µF/10V CCH1181 CEJA2R2M50 CKSQYB103K50 CEJA2R2M50 CKSQYB104K16 CEJA100M16 100µF/16V CCH1179 CEJA100M16 Unit Number : CWM6272 (KEH-1900R/X1M/EW) CKSQYB822K50 Unit Name : Keyboard Unit CKSQYB822K50 CEJA1R0M50 MISCELLANEOUS CEJA1R0M50 PD6293A CKSQYB183K50 Diode STZ6R2N CKSQYB183K50 Ferri-Inductor LAU101K CKSQYB104K16 Ceramic Resonator 4.97MHz...
  • Page 29 KEH-1900R,1930R =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Unit Number : CWM6274 (KEH-1930R/X1M/EW) Coil CTC1136 Unit Name : Keyboard Unit Trimmer CCL1046 Ceramic Filter CTF1442 MISCELLANEOUS Ceramic Filter...
  • Page 30 KEH-1900R,1930R =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/16S104J CKSQYB104K16 RS1/16S332J CCSRCH560J50 RS1/16S202J CKSQYB104K16 RS1/16S123J CCSRCH101J50 RS1/16S103J CEJA470M6R3 RS1/16S123J CKSRYB103K25 CCSRCH101J50 CAPACITORS CEJA1R5M50 CCSRCH471J50 CCSQCH6R0D50 CKSRYB103K25 CCSRCK2R0C50...

  • Page 31: Adjustment

    KEH-1900R,1930R 6. ADJUSTMENT - Connection Diagram BACK UP +14.4V D C R e g u l a t e d P o w e r S u p p l y Lch + Lch - mV Meter (1) Oscilloscope Rch +...
  • Page 32 KEH-1900R,1930R FM ADJUSTMENT Modulation M:MONO MOD., 400Hz 30%(22.5kHz Dev.) or 400Hz 100%(75kHz Dev.) S:STEREO MOD., 1kHz, L or R=30%(20.25kHz+7.5kHz Dev.) NOTE:Before proceeding to further adjustments after switching power ON, let the tuner run for ten minutes to allow the circuits to stabilize.

  • Page 33: General Information

    KEH-1900R,1930R 7. GENERAL INFORMATION 7.1 PARTS 7.1.1 IC SN761029DL AVcc IN1-L IN1-R IN2-L IN2-R IN3-L IN3-R IN4(+)-L IN4(+)-R IN4(-)-L IN4(-)-R AGND AGND SWout-L SWout-R ZCin-L ZCin-R LOUD-L LOUD-R VRin-L VRin-R TREB-L TREB-R BASS-C1-L BASS-C1-R BASS-R-L BASS-R-R BASS-C2-L BASS-C2-R TONEout-L TONEout-R...
  • Page 34 KEH-1900R,1930R - Pin Functions(PE5016A) Pin No. Pin Name Format Function and Operation RDS data input Not used ADPW A/D converter power DRST RDS decoder reset output MDSENS Modulation detect input AVREF1 (Connect to VDD) KYDT Key data input DPDT Display data output...
  • Page 35 KEH-1900R,1930R Pin No. Pin Name Format Function and Operation TESTIN Test program mode input AVDD A/D converter analog power supply (VDD) AVREF0 (A/D converter standard voltage input) Signal level input Composite level input Noise level input Trigger level input rdslk...

  • Page 36: Display

    KEH-1900R,1930R 7.1.2 DISPLAY - CAW1512...

  • Page 37: Disassembly

    KEH-1900R,1930R 7.2 DISASSEMBLY Cassette Mechanism Assy Remove the Case(not shown) 1. Remove the three screws. 2. Remove the Case. Remove the Cassette Mechanism Assy (not shown) 1. Remove the four screws. 2.Disconnect the connector, and then remove the Cassette Mechanism Assy.

  • Page 38: Operations And Specifications

    KEH-1900R,1930R 8. OPERATIONS AND SPECIFICATIONS...
  • Page 39 KEH-1900R,1930R 8.1 OPERATIONS...
  • Page 40 KEH-1900R,1930R...

  • Page 41: Specifications

    KEH-1900R,1930R 8.2 SPECIFICATIONS Specifications General FM tuner Power source ..14.4 V DC (10.8 – 15.1 V allowable) Frequency range ........87.5 – 108 MHz Grounding system ........Negative type Usable sensitivity Max. current consumption ........8.5 A ....11 dBf (1.0 V/75 , mono, S/N: 30 dB) Dimensions 50 dB quieting sensitivity ..

This manual is also suitable for:

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