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CDX-C8850R SERVICE MANUAL AEP Model UK Model Model Name Using Similar Mechanism CDX-C7850R CD Drive Mechanism Type MG-363S-121 Optical Pick-up Name KSS-521A SPECIFICATIONS CD player section General System Compact disc digital audio Outputs Line outputs (3) system Power aerial relay control...
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. 4-11. Schematic Diagram –Main Section (1/5)– ......48 REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR 4-12. Schematic Diagram –Main Section (2/5)– ......49 IN SUPPLEMENTS PUBLISHED BY SONY.
SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. SUB PANEL ASSY 4 claws 6 CN251 2 PTT 2.6x6 5 claw 1 PTT 2.6x6 7 sub panel assy 3 PTT 2.6x6 2-2. MECHANISM BLOCK 6 bracket (mechanism deck) 4 mechanism block 5 PTT 2.6x6...
2-5. CHASSIS (T) SUB ASSY 5 chassis (T) sub assy 1 P 2x3 2 P 2x3 3 P 2x3 4 claw 2-6. LEVER ASSY 5 guide (disc) 6 lever (R) assy 3 tension spring (LR) 7 lever (L) assy 1 PS 2x4 2 DISC IN SW board 4 claws...
2-9. CHASSIS (OP) (O/S) ASSY 6 chassis (OP) (O/S) assy 8 compression spring (FL) 1 tension spring (angle) 7 compression spring (FL) 4 Fit lever (D) in the direction of the arrow. 5 Turn loading ring in the direction of the arrow. 3 damper (T) 2 damper (T) 2-10.
SECTION 3 ELECTRICAL ADJUSTMENTS CD SECTION FM Auto Scan/Stop Level Adjustment Setting : CD section adjustments are done automatically in this set. SOURCE button : FM 98.00 (MHz) 0 dB = 1 µV TUNER SECTION FM RF signal Cautions during repair generator When the tuner unit is defective, replace it by a new one antenna...
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FM Stereo Separation Adjustment (WIDE) FM Stereo Separation Adjustment (NARROW) Setting : Setting : SOURCE button : FM 98.00 (MHz) SOURCE button : FM 98.00 (MHz) FM RF signal FM RF signal generator generator level meter level meter antenna antenna 10 k Ω...
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FM RDS S-Meter Adjustment MW Auto Scan/Stop Level Adjustment Setting : Setting : SOURCE n MODE button : MW 999 (kHz) SOURCE button : FM 98.00 (MHz) 30 Ω 15 pF FM RF signal generator antenna 65 pF terminal 0.01 µ F AM RF signal generator Carrier frequency : 98.00 MHz...
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Adjustment Location : tuner unit (TU101) –set upper view– TU101 MW AUTO SCAN/ STOP LEVEL ADJ RV131 FM RDS S-METER FM AUTO SCAN/ STOP LEVEL ADJ FM STEREO SEPARATION ADJ (WIDE) FM STEREO SEPARATION ADJ (NARROW)
SECTION 4 DIAGRAMS 4-1. IC PIN DESCRIPTIONS • IC501 CXD2548R (DIGITAL SERVO, DIGITAL SIGNAL PROCESSOR) (SERVO BOARD) Pin No. Pin Name Pin Description SYSM System mute input (Not used.) RMUT1 R-ch, “0” detection output. (“H” : ON, “L” : OFF) (Not used.) LMUT2 L-ch, “0”...
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Pin No. Pin Name Pin Description ASY.I Asymmetry comparate voltage input ASY.O EFM full-swing output (“L” : VSS, “H” : VDD) Center voltage input Focus error signal input Sled error signal input Tracking error signal input Center error signal input RFDC RF signal input Condenser connection pin for LPF time constant of RF signal.
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Pin No. Pin Name Pin Description AVSS2 — R-ch, Analog GND. ROUT2 R-ch, LINE output. (Not used.) AIN2 R-ch, OP amplifier input. (Connect to GND.) AOUT2 R-ch, Analog output. (Not used.) AVDD2 — R-ch, Analog power supply. AVSS2 — R-ch, Analog GND. VSS0 —...
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• IC5 CXP84640-050Q (CD SYSTEM CONTROL) (SERVO BOARD) Pin No. Pin Name Pin Description 1 – 5 — Not used in this set. FP OPEN Front panel open detection input FP CLOSE Front panel close control output LINKOFF Bus interface link input (Not used in this set.) DRV OE Focus/tracking coil/sled motor control output D SW...
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Pin No. Pin Name Pin Description BU.IN Back-up power detection input BUSON Bus on control input IN SW Disc in switch input (SW1) SELF SW Self switch input (SW2) TX CE EEPROM chip enable output SCK2 Sub Q read clock output Sub Q 80 bit, PCM peak and level data 16 bit input CD DATA CD signal process serial data output...
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• IC300 CXD2727Q (DIGITAL SIGNAL PROCESSOR) (MAIN BOARD) Pin No. Pin Name Pin Description VSS1 — Digital ground 2 – 15 TD0 – 13 Test pin (Normally, fixed at “L”.) 16 – 21 TST0 – 5 Test pin (Normally, fixed at “L”.) 22 –...
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Pin No. Pin Name Pin Description Serial data input (Fixed at “L” in this set.) Clock signal input for serial bit transfer of serial input/output data. LRCK Sampling frequency clock signal input of serial input/output data. Bit clock (BCK) and L/R sampling clock (LRCK) signal master/slave mode select XMST signal input from system control (IC500).
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Not used. (Open) 35, 36 — Ground P65/IRQ1 Not used. (Open) BUS-ON SONY BUS ON input — Power supply pin (+5 V) CD/MD CD/MD mechanism deck setting input (“L” : CD mechanism deck) 41 – 43 PE1 – 3 Not used. (Open) —...
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Not used. (Open) — Power supply pin (+5 V) 90 – 96 PF6 – 0 Not used. (Open) UNI-SO SONY BUS serial data output UNI-SI SONY BUS serial data input 99, 100 — Ground UNI-SCK SONY BUS serial clock input P53/ADTRG Not used.
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TIR PDOWN TIR reception audio recording/playback IC operation mode setting output TIR RST TIR reception audio recording IC reset output SYS RST Reset output for SONY BUS slave micon. BUS ON SONY BUS ON output — Power supply pin (+5 V)
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Pin No. Pin Name Pin Description VOL LOAD Electronic volume IC data latch output VOL DATA L Electronic volume L-ch setting data output VOL DATA R Electronic volume R-ch setting data output VOL CLK Electronic volume setting clock output DSP XLAT Data latch output to digital signal processor.
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Pin No. Pin Name Pin Description CSV CE Chip enable output to CSV control IC. CSV RST CSV control IC initial reset output — Not used. (Open) FM ON Power control output at FM reception. DOOR SW Door switch input NS MASK Mask control output of quality input at tuner reception.
CDX-C8850R 4-2. BLOCK DIAGRAM — CD SECTION — DIGITAL SERVO/ OPTICAL PICK-UP RF AMP, LD-APC ERROR AMP DIGITAL SIGNAL PROCESSOR DRAM CONTROLLER KSS-521A IC501 3 PD1 59 RFDC PCMD 9 DATI DATA DATA 55 FE LRCK 10 LRCI TUNER INVERTER...
4-5. CIRCUIT BOARDS LOCATION • Waveforms (MODE:PLAY) THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) For schematic diagrams Approx. 200mVp-p • All capacitors are in µF unless otherwise noted. pF: µµF !¢...
CDX-C8850R 4-6. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (1/3) — • Refer to page 59 for IC Block Diagrams. (Page 42) Note: • Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY ∗...
CDX-C8850R 4-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (2/3) — • Refer to page 59 for IC Block Diagrams. (Page 41) Note: • Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY ∗...
CDX-C8850R 4-8. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (3/3) — • Refer to page 60 for IC Block Diagrams. (Page 51) Note: • Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY ∗...
CDX-C8850R 4-11. SCHEMATIC DIAGRAM — MAIN SECTION (1/5) — • Refer to page 61 for IC Block Diagrams. Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : MW...
CDX-C8850R 4-12. SCHEMATIC DIAGRAM — MAIN SECTION (2/5) — • Refer to page 62 for IC Block Diagrams. (Page 51) (Page 52) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...
CDX-C8850R 4-13. SCHEMATIC DIAGRAM — MAIN SECTION (3/5) — • Refer to page 63 for IC Block Diagrams. (Page 52) (Page 51) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...
CDX-C8850R 4-14. SCHEMATIC DIAGRAM — MAIN SECTION (4/5) — • Refer to page 63 for IC Block Diagrams. (Page 49) (Page 50) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...
CDX-C8850R 4-15. SCHEMATIC DIAGRAM — MAIN SECTION (5/5) — • Refer to page 62 for IC Block Diagrams. (Page 49) (Page 50) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...
CDX-C8850R 4-16. SCHEMATIC DIAGRAM — POWER SECTION — • Refer to page 63 for IC Block Diagrams. Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...
CDX-C8850R 4-20. SCHEMATIC DIAGRAM — DISPLAY SECTION — (Page 56) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...
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IC801 RSC-164 PORT 0 INTERNAL ROM 32 X 8 (HIGH) BUFFER INTERNAL ROM 32 X 8 (LOW) REGISTER STACK SPACE SPACE ANALOG CONTROL INTERNAL BUS AIN1 AIN0 AGND INTERRUPT PULSE WIDTH BUFOUT/PWM0 LOGIC MODULATOR TEST/PWM1 AVDD EXTERNAL MEMORY RESET INTERFACE POWER TIMING &...
SECTION 5 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • Color Indication of Appearance Parts The components identified by number in the exploded views are not supplied. mark ! or dotted line with mark. Example : • Items marked “*” are not stocked since KNOB, BALANCE (WHITE) ...
5-5. CD MECHANISM SECTION (3) (MG-363S-121) M901 M902 The components identified by mark ! or dotted line with mark. ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 201...
SECTION 6 DISC IN SW DISPLAY ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark ! or dotted line with mark. the parts list may be different from the they are seldom required for routine service.
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DISPLAY LIMIT SW LOAD SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > R945 1-216-829-11 METAL CHIP 4.7K 1/16W R946 1-216-821-11 METAL CHIP 1/16W Q900 8-729-904-66 TRANSISTOR DTD113EK-T-146 R947 1-216-841-11 METAL CHIP 1/16W Q901 8-729-904-66 TRANSISTOR DTD113EK-T-146 R948...
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MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3294-743-A MAIN BOARD, COMPLETE (TYPE B) C168 1-163-019-00 CERAMIC CHIP 0.0068uF 10% (INCLUDING POWER BOARD, COMPLETE) C169 1-164-344-11 CERAMIC CHIP 0.068uF A-3294-745-A MAIN BOARD, COMPLETE (TYPE C) C170 1-163-019-00 CERAMIC CHIP 0.0068uF 10%...
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MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D461 8-719-420-51 DIODE MA729 IC402 8-759-643-48 IC BA00ASFP-E2 D462 8-719-071-25 DIODE HZU18B2TRF IC403 8-759-476-23 IC BA08SFP-E2 D463 8-719-071-25 DIODE HZU18B2TRF IC404 8-759-460-72 IC BA033FP-E2 D464 8-719-071-25 DIODE HZU18B2TRF IC421 8-759-525-98 IC RN5VL45CA-TL D466...
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MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q180 8-729-904-63 TRANSISTOR DTB123YK-T-146 R106 1-216-057-00 METAL CHIP 2.2K 1/10W Q181 8-729-029-14 TRANSISTOR DTC144EUA-T106 R114 1-216-864-11 METAL CHIP 1/16W Q182 8-729-904-63 TRANSISTOR DTB123YK-T-146 R124 1-216-037-00 METAL CHIP 1/10W Q183 8-729-029-14 TRANSISTOR DTC144EUA-T106...
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MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R280 1-216-025-00 RES,CHIP 1/10W R476 1-216-821-11 METAL CHIP 1/16W R281 1-208-462-41 RES,CHIP 1/10W R477 1-216-049-11 RES,CHIP 1/10W R282 1-208-462-41 RES,CHIP 1/10W R478 1-216-845-11 METAL CHIP 100K 1/16W R283 1-216-057-00 METAL CHIP 2.2K...
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MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R591 1-216-841-11 METAL CHIP 1/16W R657 1-216-073-00 METAL CHIP 1/10W (TYPE B) R658 1-216-073-00 METAL CHIP 1/10W R591 1-216-845-11 METAL CHIP 100K 1/16W R661 1-216-073-00 METAL CHIP 1/10W (TYPE C) R662...
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MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R773 1-218-700-11 METAL CHIP 2.2K 0.50% 1/16W R964 1-216-845-11 METAL CHIP 100K 1/16W (TYPE A,B) R965 1-216-025-00 RES,CHIP 1/10W R773 1-218-712-11 METAL CHIP 6.8K 0.50% 1/16W R966 1-216-025-00 RES,CHIP 1/10W (TYPE C)
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POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3294-739-A POWER BOARD, COMPLETE (TYPE A) C871 1-115-339-11 CERAMIC CHIP 0.1uF (SUPPLIED WITH MAIN BOARD, COMPLETE) C872 1-163-263-11 CERAMIC CHIP 330PF A-3294-742-A POWER BOARD, COMPLETE (TYPE B) C873 1-163-275-11 CERAMIC CHIP 0.001uF...
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POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < JUMPER RESISTOR > R842 1-216-049-11 RES,CHIP 1/10W R843 1-216-025-00 RES,CHIP 1/10W JC841 1-216-295-00 SHORT R844 1-216-073-00 METAL CHIP 1/10W R845 1-216-093-00 RES,CHIP 1/10W < COIL > R846 1-216-823-11 METAL CHIP 1.5K...