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Sony CDX-C7850 Service Manual Supplement
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Sony CDX-C7850 Service Manual Supplement

Sony CDX-C7850 Service Manual Supplement

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SERVICE MANUAL
SUPPLEMENT-1
File this supplement with the service manual.
Subject : Change of Main and Relay Boards
When performing service and inspection, check the suffix of the part number of
the main and relay boards.
- RELAY BOARD - (SIDE A)
- MAIN BOARD - (SIDE A)
Main board Part No.
Former : 1-672-697-11
New
CDX-C7850
US Model
Canadian Model
(ECN-CSA00017)
Relay board Part No.
Former : 1-672-698-11
New
: 1-672-698-12
: 1-672-697-12
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
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/
W or less unless otherwise
4
specified.
•
%
: indicates tolerance.
•
¢
: internal component.
• C : panel designation.
The components identified by
Les composants identifiés par une
mark ! or dotted line with mark.
marque ! sont critiques pour la
! are critical for safety.
sécurité.
Replace only with part number
Ne les remplacer que par une piéce
specified.
portant le numéro spécifié.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
J
: CD
• ((
)) : Page of service manual.
<<
>> : Page of supplement-1.
For printed wiring boards
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
r
: Through hole.
•
¢
: internal component.
• b : Pattern from the side which enables seeing.
(The other layer's patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
parts face are indicated.
• ((
)) : Page of service manual.
<<
>> : Page of supplement-1.
– 2 –

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Summary of Contents for Sony CDX-C7850

  • Page 1 CDX-C7850 THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is US Model printed in each block.) Canadian Model For schematic diagrams • All capacitors are in µF unless otherwise noted. pF: µµF...
  • Page 2 CDX-C7850 1. PRINTED WIRING BOARD — MAIN SECTION — • Semiconductor Location Ref. No. Location Ref. No. Location (D10) (IC206) (D11) IC207 (D12) IC208 (IC211) (D13) D201 IC401 D202 IC403 (IC404) D203 D204 IC501 D205 IC505 B-10 D206 IC601 G-10...
  • Page 3 CDX-C7850 <<Page 45>> ((Page 15)) ((Page 16)) – 5 – – 6 –...
  • Page 4 CDX-C7850 2. SCHEMATIC DIAGRAM — MAIN SECTION (1/4) — ((Page 12)) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : AM – 7 – – 8 –...
  • Page 5 CDX-C7850 3. SCHEMATIC DIAGRAM — MAIN SECTION (2/4) — ((Page 12)) ((Page 13)) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM – 9 – – 10 –...
  • Page 6 CDX-C7850 4. SCHEMATIC DIAGRAM — MAIN SECTION (3/4) — ((Page 8)) ((Page 9)) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : AM < > : CD PLAY – 11 –...
  • Page 7 CDX-C7850 5. SCHEMATIC DIAGRAM — MAIN SECTION (4/4) — ((Page 9)) ((Page 17)) Note: • Voltage is dc with respect to ground under no mark : FM no-signal (detuned) condition. ) : AM < > : CD PLAY – 13 –...
  • Page 8 CDX-C7850 6. PRINTED WIRING BOARD — RELAY SECTION — • Semiconductor Location Ref. No. Location (D850) (D851) LED802 LED803 LED804 ) : SIDE B ((Page 5)) ((Page 5)) <<Page 60>> – 15 – – 16 –...

  • Page 9: Schematic Diagram - Relay Section

    CDX-C7850 7. SCHEMATIC DIAGRAM — RELAY SECTION — <<Page 61>> ((Page 14)) ((Page 14)) – 17 –...

  • Page 10: Electrical Parts List

    MAIN 8. 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. ! are critical for safety.
  • Page 11 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C241 1-126-157-11 ELECT 10uF C404 1-163-038-00 CERAMIC CHIP 0.1uF C242 1-124-234-00 ELECT 22uF C406 1-115-651-11 ELECT 100uF C243 1-126-157-11 ELECT 10uF C407 1-163-237-11 CERAMIC CHIP 27PF C244 1-126-157-11 ELECT 10uF C408...
  • Page 12 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C628 1-124-234-00 ELECT 22uF D212 8-719-421-24 DIODE MA8039-H C629 1-124-234-00 ELECT 22uF D401 8-719-977-03 DIODE DTZ5.6B C632 1-163-009-11 CERAMIC CHIP 0.001uF D402 8-719-422-94 DIODE MA8091-L C634 1-163-009-11 CERAMIC CHIP 0.001uF D501 8-719-400-20 DIODE MA152WA...
  • Page 13 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC204 8-752-091-06 IC CXA1846BN-T4 < EARTH TERMINAL > IC205 8-759-444-50 IC TDA8574(T) IC206 8-759-385-17 IC NJM4580E(TE2) * LUG1 1-537-738-21 TERMINAL, EARTH IC207 8-759-444-50 IC TDA8574(T) IC208 8-759-444-50 IC TDA8574(T) <...
  • Page 14 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q630 8-729-900-53 TRANSISTOR DTC114EK R226 1-216-065-00 RES,CHIP 4.7K 1/10W Q631 8-729-106-60 TRANSISTOR 2SB1115A R227 1-216-073-00 METAL CHIP 1/10W Q801 8-729-027-23 TRANSISTOR DTA114EKA-T146 R228 1-216-065-00 RES,CHIP 4.7K 1/10W Q802 8-729-027-23 TRANSISTOR DTA114EKA-T146 R229...
  • Page 15 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R285 1-216-033-00 METAL CHIP 1/10W R632 1-216-097-00 RES,CHIP 100K 1/10W R286 1-216-081-00 METAL CHIP 1/10W R633 1-216-067-00 METAL CHIP 5.6K 1/10W R287 1-216-081-00 METAL CHIP 1/10W R636 1-216-073-00 METAL CHIP 1/10W R288...

  • Page 16: Main Relay

    CDX-C7850 MAIN RELAY Ref. No. Part No. Description Remark < SWITCH > SW502 1-571-478-11 SWITCH, SLIDE (POWER SELECT) SW802 1-762-108-31 SWITCH, PUSH (1 KEY) (NOSE DET) < THERMISTOR (POSITIVE) > TH501 1-801-792-21 THERMISTOR, POSITIVE < TUNER > TU10 A-3282-045-A TUNER UNIT (TUX-012(E)) <...