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CDX-C7850
US Model Canadian Model
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 and 1/4 W or less unless otherwise specified. · % : indicates tolerance. ¢ · : internal component. · C : panel designation. The components identified by mark ! or dotted line with mark. ! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque ! sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
SERVICE MANUAL
SUPPLEMENT-1
File this supplement with the service manual.
Subject : Change of Main and Relay Boards
(ECN-CSA00017)
When performing service and inspection, check the suffix of the part number of the main and relay boards.
- RELAY BOARD - (SIDE A)
· 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 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production 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: (Side B) Parts face side: (Side A) · (( << Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.
Relay board Part No. Former : 1-672-698-11 New : 1-672-698-12
- MAIN BOARD - (SIDE A)
)) : Page of service manual. >> : Page of supplement-1.
Main board Part No. Former : 1-672-697-11 New : 1-672-697-12
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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
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((Page 9))
CDX-C7850
3. SCHEMATIC DIAGRAM -- MAIN SECTION (2/4) --
((Page 8))
((Page 12))
((Page 13))
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM
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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
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((Page 13))
CDX-C7850
5. SCHEMATIC DIAGRAM -- MAIN SECTION (4/4) --
((Page 9))
((Page 12))
((Page 17))
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition.
no mark : FM ( ) : AM < > : CD PLAY
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((Page 17))
CDX-C7850
7. SCHEMATIC DIAGRAM -- RELAY SECTION --
<>
((Page 14))
((Page 14))
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