Table of Contents
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QQ
3 7 63 1515 0
Service
Manual
HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-1900
KEH-1950
- This service manual should be used together with the following manual(s):
Model No.
CX-644
TE
L 13942296513
CONTENTS
1. SAFETY INFORMATION............................................2
2. EXPLODED VIEWS AND PARTS LIST ......................2
4. PCB CONNECTION DIAGRAM................................18
www
5. ELECTRICAL PARTS LIST........................................26
6. ADJUSTMENT .........................................................30
.
PIONEER CORPORATION
PIONEER ELECTRONICS SERVICE INC.
PIONEER ELECTRONIC [EUROPE] N.V.
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 1999
http://www.xiaoyu163.com
Order No.
Mech. Module Remarks
CRT1800
2M
x
ao
y
i
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
http://www.xiaoyu163.com
8
KEH-1900/X1M/UC
X1M/ES
Cassette Mech. Module:Circuit Description, Mech.Description, Disassembly
Q Q
3
6 7
1 3
7. GENERAL INFORMATION.......................................32
7.1 DISASSEMBLY ..................................................32
7.2 PARTS ................................................................33
7.2.1 IC ...............................................................33
7.2.2 DISPLAY ...................................................36
u163
8. OPERATIONS AND SPECIFICATIONS ....................37
.
2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
m
co
K-ZZY. NOV. 1999 Printed in Japan
9 9
ORDER NO.
CRT2424
X1M/UC
2 8
9 9
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Table of Contents
Related Manuals for Pioneer KEH-1900
Summary of Contents for Pioneer KEH-1900
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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 CORPORATION 1999 K-ZZY. NOV. 1999 Printed in Japan http://www.xiaoyu163.com... -
Page 2: Safety Information
KEH-1900,1950 3 7 63 1515 0 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: Manual
KEH-1900,1950 3 7 63 1515 0 NOTE: - Parts marked by “*” are generally unavailable because they are not in our Master Spare Parts List. ∇ mark on the product are used for disassembly. - Screws adjacent to - PACKING SECTION PARTS LIST Part.No... -
Page 4: Manual
KEH-1900,1950 3 7 63 1515 0 2.2 EXTERIOR L 13942296513 u163 http://www.xiaoyu163.com... -
Page 5: Manual
See Contrast table(2) 34 Button(FF) CAC5874 69 Holder See Contrast table(2) 35 Button(CROSS) CAC6295 (2) CONTRAST TABLE KEH-1900/X1M/UC and KEH-1950/X1M/ES are constructed the same except for the following: Part No. Mark No. Description KEH-1900/X1M/UC KEH-1950/X1M/ES Tuner Amp Unit CWM6742 CWM6744... -
Page 6: Manual
KEH-1900,1950 3 7 63 1515 0 2.3 CASSETTE MECHANISM ASSY L 13942296513 u163 http://www.xiaoyu163.com... -
Page 7: Manual
KEH-1900,1950 3 7 63 1515 0 - 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... -
Page 8: Block Diagram And Schematic Diagram
KEH-1900,1950 3 7 63 1515 0 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM - KEH-1900/X1M/UC TUNER AMP UNIT TUN-L FM/AM TUNER UNIT ILL+B Q31 CF51 CF52 CF53 FM/AM MIX FM/AM IF FM IF FM IF FM RF... -
Page 9: Manual
KEH-1900,1950 3 7 63 1515 0 CN401 TUN-L REAR Lch OUT RL OUT Q403 Q401 ILL+B MUTE ELECTRONIC VOLUME FWD-L POWER AMP CASSETTE SPEAKER EQUALIZER IC 401 FWD/REV SWITCH IC 501 SN761029DL IC 201 TDA7384 LA3161P SPEAKER STBY MUTE... - Page 10 KEH-1900,1950 3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) 3 7 63 1515 0 Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS LIST”. TUNER AMP UNIT ELECTRONIC VOLU Large size SCH diagram...
- Page 11 KEH-1900,1950 3 7 63 1515 0 FM : 100% 35.1dBs AM : 30% 24.1dBs TAPE : 315Hz 0dB 22.1dBs TAPE : -4.5dBs POWER AMP TAPE : -3.9dBs AM : -0.9dBs FM : 5.1dBs TAPE : 22.1dBs L 13942296513 FUSE 600µH...
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Page 12: Manual
KEH-1900,1950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 13: Manual
KEH-1900,1950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 14: Manual
KEH-1900,1950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 15: Manual
KEH-1900,1950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 16: Manual
KEH-1900,1950 3 7 63 1515 0 3.3 FM/AM TUNER UNIT FM/AM TUNER UN L 13942296513 u163 http://www.xiaoyu163.com... -
Page 17: Manual
KEH-1900,1950 3 7 63 1515 0 R UNIT L 13942296513 u163 http://www.xiaoyu163.com... -
Page 18: Pcb Connection Diagram
KEH-1900,1950 3 7 63 1515 0 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: Manual
KEH-1900,1950 3 7 63 1515 0 SIDE A L 13942296513 u163 CN901 http://www.xiaoyu163.com... -
Page 20: Manual
KEH-1900,1950 3 7 63 1515 0 TUNER AMP UNIT L 13942296513 u163 http://www.xiaoyu163.com... -
Page 21: Manual
KEH-1900,1950 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 22: Manual
KEH-1900,1950 3 7 63 1515 0 4.2 FM/AM TUNER UNIT SIDE A L 13942296513 u163 http://www.xiaoyu163.com... -
Page 23: Manual
KEH-1900,1950 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 24: Manual
KEH-1900,1950 4.3 KEYBOARD UNIT 3 7 63 1515 0 SIDE A SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 25: Manual
KEH-1900,1950 3 7 63 1515 0 4.4 CASSETTE PCB CASSETTE PCB LOAD SW MOTOR FWD/REV PB HEAD MUTE SW 5 7 9 FWD/REV SW 8 10 CN601 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 26: Electrical Parts List
KEH-1900,1950 3 7 63 1515 0 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.. -
Page 27: Manual
KEH-1900,1950 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S393J CAPACITORS (1950/X1M/ES) RS1/10S0R0J RS1/10S0R0J CEJA2R2M50 (1950/X1M/ES) RS1/8S0R0J CEJA2R2M50 RS1/10S162J CKSQYB333K25 CKSQYB333K25 RS1/10S162J... -
Page 28: Manual
KEH-1900,1950 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CEJA100M16 RESISTORS CKSQYB104K50 CKSQYB104K16 RS1/16S225J CKSQYB102K50 RS1/16S225J CEJA4R7M35 RS1/16S154J RS1/16S391J CKSQYB224K16 RS1/16S223J CKSQYB102K50... -
Page 29: Manual
KEH-1900,1950 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CAPACITORS CCSRCH560J50 CKSQYB104K16 CCSRCH101J50 CCSQCH6R0D50 CEJA470M6R3 CCSRCK2R0C50 CKSRYB103K25 CCSRCH820J50 CCSRCH820J50 CCSRCH101J50 CKSRYB103K25 CEJA1R5M50... -
Page 30: Adjustment
KEH-1900,1950 3 7 63 1515 0 6. ADJUSTMENT - Connection Diagram BACK UP +14.4V DC Regulated Power Supply Lch + 4Ω Lch - mV Meter (1) Oscilloscope Rch + 4Ω Rch - Dummy Antenna Antenna Plug 50Ω (37.5Ω ) - Page 31 KEH-1900,1950 3 7 63 1515 0 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.
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Page 32: General Information
KEH-1900,1950 3 7 63 1515 0 7. GENERAL INFORMATION 7.1 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. -
Page 33: Parts
KEH-1900,1950 3 7 63 1515 0 7.2 PARTS 7.2.1 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 L 13942296513 BASS-C1-L BASS-C1-R BASS-R-L... -
Page 34: Manual
KEH-1900,1950 3 7 63 1515 0 Pin Functions (PE5107A) Pin No. Pin Name Format Function and Operation mcmute Cassette mechanism mute input tapld Tape loading input Error output VDD1 Power supply VCOIN AM/FM VCO input ACC power sense input... -
Page 35: Manual
KEH-1900,1950 3 7 63 1515 0 *PE5107A IC's marked by* are MOS type. Be careful in handling them because they are very liable to be damaged by electrostatic induction. Format Meaning C MOS - Pin Functions(PDC045A) Pin No. Pin Name Function and Operation 1–4... -
Page 36: Display
KEH-1900,1950 3 7 63 1515 0 7.2.2 DISPLAY - CAW1568 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 37: Operations And Specifications
KEH-1900,1950 3 7 63 1515 0 8. OPERATIONS AND SPECIFICATIONS - KEH-1900/X1M/UC L 13942296513 u163 http://www.xiaoyu163.com... -
Page 38: Manual
KEH-1900,1950 3 7 63 1515 0 - KEH-1900/X1M/UC 8.1 OPERATIONS L 13942296513 u163 http://www.xiaoyu163.com... -
Page 39: Manual
KEH-1900,1950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 40: Manual
KEH-1900,1950 3 7 63 1515 0 8.2 SPECIFICATIONS - KEH-1900/X1M/UC Specifications General FM tuner Power source ..14.4 V DC (10.8 – 15.1 V allowable) Frequency range ........87.9 – 107.9 MHz Grounding system ........Negative type Usable sensitivity ............ 11 dBf (1.0 µV/75 Ω, mono, S/N: 30 dB) -
Page 41: Manual
KEH-1900,1950 3 7 63 1515 0 - KEH-1950/X1M/ES 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 ............ 11 dBf (1.0 µV/75 Ω, mono, S/N: 30 dB)