Sony CDX-C7850 Service Manual Supplement

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 –