Table of Contents
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3 7 63 1515 0
Service
Manual
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-P7850
TE
L 13942296513
NOTE:
- See the separate manual CX-631(CRT1640) for the cassette mechanism description.
- The cassette mechanism assy employed in this model is one of 2L series.
- Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
CONTENTS
1. SAFETY INFORMATION ...........................................2
2. EXPLODED VIEWS AND PARTS LIST......................2
3. SCHEMATIC DIAGRAM ..........................................10
4. PCB CONNECTION DIAGRAM ...............................20
5. ELECTRICAL PARTS LIST .......................................30
6. ADJUSTMENT ........................................................36
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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 1998
http://www.xiaoyu163.com
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P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
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7. GENERAL INFORMATION ......................................38
7.1 PARTS.................................................................38
7.1.1 IC ...............................................................38
7.1.2 DISPLAY ...................................................43
7.2 DIAGNOSIS........................................................44
7.2.1 DISASSEMBLY .........................................44
7.2.2 TEST MODE .............................................45
7.3 BLOCK DIAGRAM..............................................48
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8. OPERATIONS AND SPECIFICATIONS ...................49
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4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
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ORDER NO.
CRT2307
X1N/ES
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8
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K-ZZS. NOV. 1998 Printed in Japan
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Summary of Contents for Pioneer KEH-P7850
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Page 1: Table Of Contents
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 1998 K-ZZS. NOV. 1998 Printed in Japan http://www.xiaoyu163.com... -
Page 2: Safety Information
KEH-P7850 3 7 63 1515 0 1. SAFETY INFORMATION 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-P7850 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 Mark No. -
Page 4: Http://Www.xiaoyu163.Com 3
KEH-P7850 3 7 63 1515 0 2.2 EXTERIOR L 13942296513 u163 http://www.xiaoyu163.com... -
Page 5: Manual
KEH-P7850 3 7 63 1515 0 (1) EXTERIOR SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BMZ30P040FMC 46 Insulator CNM6190 2 Screw BSZ26P050FMC 47 Insulator CNM6257 3 Screw BSZ30P050FMC 48 Heat Sink... -
Page 6: Http://Www.xiaoyu163.Com
KEH-P7850 3 7 63 1515 0 Mark No. Description Part No. 91 Holder CNS5165 92 Holder CNS5389 93 Switch(S602) CSN1027 94 Holder Unit CXB3049 95 Holder Unit CXB3050 96 Holder Unit CXB3051 97 Damper Unit CXB3180 98 Screw IMS20P040FZK... -
Page 7: Manual
KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... - Page 8 KEH-P7850 3 7 63 1515 0 2.3 CASSETTE MECHANISM MODULE L 13942296513 u163 http://www.xiaoyu163.com...
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Page 9: Manual
KEH-P7850 3 7 63 1515 0 - CASSETTE MECHANISM MODULE SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BSZ20P040FMC 31 Gear ENV1347 2 Washer CBF1037 32 Collar ENV1508 3 Washer CBF1038 33 Gear... -
Page 10: Schematic Diagram
KEH-P7850 3 7 63 1515 0 3. SCHEMATIC DIAGRAM 3.1 OVERALL CONNECTION DIAGRAM (GUIDE PAGE) Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS LIST”. ANTENNA JACK Large size SCH diagram... -
Page 11: Manual
KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 12: Manual
KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 13: Manual
KEH-P7850 3 7 63 1515 0 L 13942296513 u163 A-a C http://www.xiaoyu163.com... -
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KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 15: Manual
KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 16: Manual
KEH-P7850 3 7 63 1515 0 3.2 FM/AM TUNER UNIT FM/AM TUNER UN L 13942296513 u163 http://www.xiaoyu163.com... -
Page 17: Manual
KEH-P7850 3 7 63 1515 0 ER UNIT L 13942296513 u163 http://www.xiaoyu163.com... -
Page 18: Manual
KEH-P7850 3 7 63 1515 0 3.3 CASSETTE MECHANISM MODULE DECK UNIT VR302 CCP1280 33K(B) C256 R258 C253 330P R283 0R0 R256 220 R273 C254 330P R284 0R0 R272 R271 R290 R282 0R0 R274 C273 CXA2560Q C252 330P R287... -
Page 19: Manual
KEH-P7850 3 7 63 1515 0 PCB UNIT MOTOR UNIT (MAIN MOTOR) EXA1490 LOAD R373 70µs ESG1004 R375 ESG1004 R290 MODE SENSE C403 R068 EGN1 R403 82K EGN1005 C402 R402 4700P C401 R401 4R7K MOTOR UNIT (SUB MOTOR) EXA1485... -
Page 20: Pcb Connection Diagram
KEH-P7850 3 7 63 1515 0 4. PCB CONNECTION DIAGRAM TUNER AMP UNIT 4.1 TUNER AMP UNIT CORD ASSY CORD NOTE FOR PCB DIAGRAMS 1. The parts mounted on this PCB include all necessary parts for several destination. For further information for... -
Page 21: Manual
KEH-P7850 3 7 63 1515 0 SIDE A CORD PRE OUT IP BUS IN ANTENNA L 13942296513 CN251 S602 u163 DOOR CN901 http://www.xiaoyu163.com... -
Page 22: Manual
KEH-P7850 3 7 63 1515 0 TUNER AMP UNIT L 13942296513 u163 http://www.xiaoyu163.com... -
Page 23: Manual
KEH-P7850 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 24: Manual
KEH-P7850 3 7 63 1515 0 4.2 KEYBOARD UNIT SIDE A L 13942296513 u163 http://www.xiaoyu163.com... -
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KEH-P7850 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 26: Manual
KEH-P7850 3 7 63 1515 0 4.3 FM/AM TUNER UNIT SIDE A L 13942296513 u163 http://www.xiaoyu163.com... -
Page 27: Manual
KEH-P7850 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 28: Manual
KEH-P7850 3 7 63 1515 0 4.4 CASSETTE MECHANISM MODULE DECK UNIT SIDE A CN602 L 13942296513 DECK UNIT SIDE B HEAD ASSY u163 http://www.xiaoyu163.com... -
Page 29: Manual
KEH-P7850 3 7 63 1515 0 PCB UNIT SIDE A LOAD SW EGN1 MODE SENSE 70µ SW PCB UNIT SIDE B L 13942296513 CN253 1 2 3 4 5 6 REEL PCB u163 http://www.xiaoyu163.com... -
Page 30: Electrical Parts List
KEH-P7850 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 31: Manual
KEH-P7850 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CAPACITORS CKSQYB104K16 CCSRCH101J50 CCSQCH6R0D50 CEJA470M6R3 CCSRCK2R0C50 CKSRYB103K25 CCSRCH820J50 CCSRCH101J50 CCSRCH820J50 CKSRYB103K25 CEJA1R5M50 CCSRCH471J50... -
Page 32: Manual
KEH-P7850 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Transistor 2SA1674 RS1/10S222J Transistor 2SA1048 RS1/10S562J Transistor DTC114TU RS1/10S821J Transistor DTC114TU RS1/10S821J Transistor... -
Page 33: Manual
KEH-P7850 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S751J RS1/8S474J RS1/10S473J RS1/8S105J RD1/4PU102J RD1/2PM182J RS1/10S103J RD1/2PM182J RS1/10S223J RS1/10S152J RS1/10S223J RS1/10S103J RS1/10S223J... -
Page 34: Manual
KEH-P7850 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CKSQYB223K50 Unit Number : CWM6061 CKSQYB102K50 Unit Name : Keyboard Unit CEJA220M16 CKSQYB103K50... - Page 35 KEH-P7850 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CAPACITORS CKSQYB103K50 CKSQYB103K50 CSZSR100M6R3 CKSYB104K50 CKSQYF104Z50 CKSQYB103K50 CSZSR100M6R3 CKSQYB334K16 CKSQYB103K25 CKSQYB103K25 CKSQYB472K50 CKSQYB683K16...
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Page 36: Adjustment
KEH-P7850 3 7 63 1515 0 6. ADJUSTMENT - Connection Diagram BACK UP +14.4V DC Regulated Power Supply Lch + 4Ω Lch - Oscilloscope mV Meter (1) Rch + 4Ω Rch - FM/AM TUNER UNIT (TOP VIEW) TUNER AMP UNIT... -
Page 37: Manual
KEH-P7850 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. -
Page 38: General Information
KEH-P7850 3 7 63 1515 0 7. GENERAL INFORMATION 7.1 PARTS 7.1.1 IC PML003AM Loud- Front- Rear- IN1_R IN2_R IN3_R IN4+_R IN4-_R AGND out_R SVin_R out_R out_R FIE_R DATA Isolator circuit Anti radiation Fader Secondary Anti Alias filter volume... -
Page 39: Manual
KEH-P7850 3 7 63 1515 0 PML005A VCCO PGND GATE ISET-N ISET-D CLKC CLKR VDCSEN CXA2560Q L 13942296513 u163 http://www.xiaoyu163.com... -
Page 40: Manual
KEH-P7850 3 7 63 1515 0 - Pin Functions (PE5002A) Pin No. Pin Name Function and Operation swvdd Key board unit power supply control output dsens Grille detach sense csens Flap close sense input isens Illumination sense input TESTIN... -
Page 41: Manual
KEH-P7850 3 7 63 1515 0 Pin No. Pin Name Function and Operation RIMUTE Mute output when RI Clock adjustment output NR output Cassette mechanism sub motor control output Cassette mechanism sub motor control output Cassette mechanism capstan motor control output... -
Page 42: Manual
KEH-P7850 3 7 63 1515 0 - Pin Functions(PD6294A) Pin No. Pin Name Function and Operation Crystal oscillator connection pin Crystal oscillator connection pin System reset MODE1,0 GRN/amb Green/Amber select output UART output UART input REMIN Remote control reception... -
Page 43: Display
KEH-P7850 3 7 63 1515 0 7.1.2 DISPLAY - CAW1502 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 44: Diagnosis
KEH-P7850 3 7 63 1515 0 7.2 DIAGNOSIS 7.2.1 DISASSEMBLY Removing the Case(not shown) 1. Remove the two screws. 2. Remove the Case. Removing the Cassette Mechanism Module (not shown) 1. Remove the four screws. 2.Disconnect the connector, and then removing the Cassette Mechanism Module. -
Page 45: Test Mode
KEH-P7850 3 7 63 1515 0 7.2.2 TEST MODE - Flow Chart ACC, Back-up ON 00" SOURCE Display <CD multi player selected> During regulator off, press the 6 00" key and the system will be put into BAND 00"... -
Page 46: Manual
KEH-P7850 3 7 63 1515 0 - New Test Mode(aging operation and setup analysis) The single CD player plays in normal mode. After being set up, it will display FOK (focus), LOCK (spindle), subcode, sound skip, protection against a mechanical error or the like, occurrence of an error, cause and time of an expiry, if any, (and disc number) During the setup, the CD software operation status (internal RAM and C-point)is displayed. -
Page 47: Manual
KEH-P7850 3 7 63 1515 0 (5) Example of Display. •Protection/Error upon occurrence(8 digits display LCD) •SET UP in progress 8 digits display LCD (a) Error number indicated TNo. ERROR–xx Select the display with the •Operation (PLAY, SEARCH, etc.) in progress perfectly BAND key. -
Page 48: Block Diagram
KEH-P7850 3 7 63 1515 0 7.3 BLOCK DIAGRAM L 13942296513 u163 http://www.xiaoyu163.com... -
Page 49: Operations And Specifications
KEH-P7850 8. OPERATIONS AND SPECIFICATIONS 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
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KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
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KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
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KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
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KEH-P7850 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 54: Manual
KEH-P7850 3 7 63 1515 0 8.2 SPECIFICATIONS General Cassette player Power source 14.4 V DC (10.8 – 15.1 V allowable) Tape .... Compact cassette tape (C-30 – C-90) Grounding system ......Negative type Tape speed 4.76 cm/sec.(+0.14cm/sec.,-0.05cm/sec.) Max. current consumption ......10 A Fast forward/rewinding time Approx.