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File name KEH-P7900R_KEH-P7910R_KEH-P7950.pdf part 1.pdf

Service Manual KEH-P7900R/X1N/EW ORDER NO. CRT2458 MULTI-CD/DAB CONTROL HIGH POWER CASSETTE PLAYER WITH RDS TUNER KEH-P7900R KEH-P7910R KEH-P7950 1 Model No. CX-1011 Order No. CRT2406 X1N/EW X1N/EE MULTI-CD/DAB CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER X N/ES - This service manual should be used together with the following manual(s): Mech. Module Remarks 3L Cassette Mech. Module:Mech.Description, Disassembly, Adjustment NOTE: - Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. - This service manual does not describe the CD test mode. For the operations in the CD test mode, refer to the CD player's Service manual. CONTENTS 1. 2. 3. 4. 5. 6. SAFETY INFORMATION ...2 EXPLODED VIEWS AND PARTS LIST ...2 BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...10 PCB CONNECTION DIAGRAM ...32 ELECTRICAL PARTS LIST ...44 ADJUSTMENT...62 7. GENERAL INFORMATION ...63 7.1 DISASSEMBLY ...63 7.2 IC ...65 7.3 OPERATIONAL FLOW CHART ...72 8. OPERATIONS AND SPECIFICATIONS...73 PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER 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 2000 K-ZZB. FEB. 2000 Printed in Japan KEH-P7900R,P7910R,P7950 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. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely; you should not risk trying to do so and refer the repair to a qualified service technician. 2. EXPLODED VIEWS AND PARTS LIST 2.1 PACKING - KEH-P7900R/X1N/EW, KEH-P7910R/X1N/EE 3 5 4 6 2 7 14 12 1 10 8 13 11 9 2 KEH-P7900R,P7910R,P7950 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 Mark No. Description 1 Cord Assy(EW) Cord Assy(EE) 2 Inner Box 3 Accessory Assy 4 Screw 5 6 7 8 9 Handle Bush Polyethylene Bag Polyethylene Ba

File name KEH-P7900R_KEH-P7910R_KEH-P7950.pdf part 2..pdf

1 2 3 4 KEH-P7900R,P7910R,P7950 3.7 KEYBOARD UNIT(KEH-P7950/X1N/ES) A D CN604 DISP ENT B LOUD EQ+ SOURCE 1 EQ- 2 3 4 5 6 CLOCK C AUDIO PGM BAND FUNC OPEN D OE 26 C 1 2 3 4 5 6 7 8 KEH-P7900R,P7910R,P7950 A C KEYBOARD UNIT DATA ROM B KEY / OEL CONTROLLER C 22k(B) D OEL UNIT MXR8004 5 6 7 C 8 27 1 2 3 4 KEH-P7900R,P7910R,P7950 3.8 PANEL PCB UNIT A D PANEL PCB UNIT CN604 CN605 S602 C B CN1901 EJECT CSG1112 A CN801 C D 28 D 1 2 3 4 KEH-P7900R,P7910R,P7950 29 1 2 3 4 KEH-P7900R,P7910R,P7950 3.9 CASSETTE MECHANISM MODULE A F CN252 DECK UNIT CCP1280 VR302 33K(B) C310 TCH2 C253 330P R01 1K LINEOUT2 PBOUT2 PBTC2 DIREF OUTREF2 TAPEIN2 MSSW GND Rev-L RL R283 0R0 30 29 28 27 26 25 24 23 22 21 18K R1 R258 R301 C256 C302 R1 Rev-R RR C254 330P R284 0R0 R256 220 B FR Fwd-R Fwd-L FL R282 0R0 C252 330P C273 22/16 R281 0R0 C251 330P R287 0R0 LINEOUT1 OUTREF1 TAPEIN1 PBOUT1 R01 1K CCP1280 VR301 33K(B) TEST TAPE NCT-150 (400Hz, 200nWb/m) C255 R257 C301 1 2 3 4 5 6 7 8 9 10 VCC MSLPF PBTC1 HD1 HEAD ASSY EXA1589 R255 220 31 32 33 34 35 36 37 38 39 40 PBFB2 PBRIN2 PBGND PBFIN2 VCT PBREF PBFIN1 PBGND PBRIN1 PBFB1 MSMODE DRSW IC251 CXA2560Q TAPESW MUTESW NRSW MSOUT DOLBY B NR TCH1 MSTC G1FB G2FB 20 19 18 17 16 15 14 13 12 11 R273 R272 R271 R274 1K 1K 1K 1K R290 0R C403 R0 R403 82 C402 3900P C401 R33 R401 4R7K R402 0R0 R1 C309 100P R1 C C272 R1 0R0 CN251 MUTE R286 R285 0R0 C313 -6dBs(388mV)±1dB A R323 CN251 D 30 1 F 2 3 4 R322 1K 5 6 7 8 KEH-P7900R,P7910R,P7950 A M1 MOTOR UNIT (MAIN MOTOR) EXA1490 CN255 CN253 R375 0R0 CN256 REEL SENSE RSB GND RS mtl S3 70µs MODE S2 LOAD S1 ESG1007x3 EGN1 EGN1004 MCS R373 0R0 3900P R355 270K C352 load RS3 R290 0R0 RS2 RS1 SC2 SC1 TAB MC MCS 300 RRS FRS RSB C TAB MS2 PA2020A REEL SENSE PCB B R362 C403 R068 G R403 82K C402 3900P R402 18K R401 4R7K CN254 R22 M2 MOTOR UNIT (SUB MOTOR) EXA1580 IC351 C401 R33 CE VCC2 VCC NC NC NC SM1 MM R374 0R0 R01 1SS355 C356 R01 C353 R01 MECHANISM DRIVER 1K 1K 1K 1K R351 R352 R353 R354 C354 C351 C355 R1 SWITCHES: REEL SENSE PCB S1:LOAD SWITCH...EJECT-PLAY S2:MODE SWITCH...ON-OFF S3:70µs SWITCH...ON-OFF The underlined indicates the switch position. C D352 D 5 6 7 F G 8 31 1 2 3 4 KEH-P7900R,P7910R,P7950 4. PCB CONNECTION DIAGRAM 4.1 TUNER AMP UNIT A CORD ASSY 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. 2. Viewpoint of PCB diagrams E 15 13 11 9 16 14 12 10 7 8 5 6 3 4 1 2 E Connector Capacitor SIDE A B P.C.Board Chip Part SIDE B E E A TUNER AMP UNIT E E C E E D 32 A 1 2 3 4 5 6 7 8 KEH-P7900R,P7910R,P7950 CORD ASSY IC,Q A SIDE A E E E RCA E IP-BUS E CN403 E E CN752 B