sony CDX-3700 Service Manual
SERVICE MANUAL
SUPPLEMENT-1
File this supplement with the service manual.
Subject : Change of Main and Key Boards
When performing service and inspection, check the suffix of the part number of
the main and key boards.
1. DISCRIMINATION
CDX-3700
E Model
(ECN-CSB00629)
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/
specified.
• % : indicates tolerance.
¢
•
• C : panel designation.
Note: The components identified by mark ! or dotted line
• U : B+ Line.
• Power voltage is dc 14.4V and f ed with regulated dc power
• Voltages are tak en with a V OM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• (( )) : Page of supplement-1.
: internal component.
with mark ! are critical for safety.
Replace only with part number specified.
supply from ACC and BATT cords.
Voltage variations may be noted due to normal produc-
tion tolerances.
Voltage variations may be noted due to normal produc-
tion tolerances.
F : FM
f : AM
J : CD
4
W or less unless otherwise
– MAIN BOARD (SIDE B) –
MAIN Board Part No.
Former : 1-672-491-11
New : 1-672-491-12
For printed wiring boards
• Y : parts extracted from the conductor side.
®
•
•
• b : Pattern from the side which enables seeing.
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 supplement-1.
: Through hole.
¢
: internal component.
(The other layer’s patterns are not indicated.)
– KEY BOARD (SIDE B) –
KEY Board Part No.
Former : 1-672-492-11
New : 1-672-492-12
11
CDX-3700
3. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) —
((Page 5))
• Wavef orms (MODE:PLA Y)
1
1.3Vp-p
9
(ARF)
IC102
2
0V
Approx. 200mVp-p
@™
(TE)
IC102
3
0V
Approx. 600mVp-p
@£
(FE)
IC102
Note:
• Voltage and waveforms are dc with respect
to ground under no-signal conditions.
no mark : CD PLAY
44
((Page 6))
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