SERVICE MANUAL
US Model
Canadian Model
CDX-C7850
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.
(ECN-CSA00017)
- RELAY BOARD - (SIDE A)
- MAIN BOARD - (SIDE A)
Main board Part No.
Former : 1-672-697-11
New : 1-672-697-12
Relay board Part No.
Former : 1-672-698-11
New : 1-672-698-12
– 2 –
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
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
¢
: internal component.
•
C
: panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
•
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
Ω
).
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.)
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.
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.
