Read Sony ICF-CD553RM Service Manual online
ICF-CD553RM
17
17
6-4.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
•
All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
•
All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
• C
: panel designation.
• A
: B+ Line.
• H
: adjustment for repair.
•
Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM/TV (2 – 6 ch)
(
under no-signal (detuned) conditions.
no mark : FM/TV (2 – 6 ch)
(
) : AM
〈〈
〉〉
: TV (7 – 13 ch)/WEATHER (1 – 7 ch)
[
] : CD PLAY
{
} : MESSAGE REC/PLAY
•
Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
•
Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
Voltage variations may be noted due to normal produc-
tion tolerances.
•
Circled numbers refer to waveforms.
•
Signal path.
F
: FM/TV (2 – 6 ch)
L
: TV (7 – 13 ch)/WEATHER (1 – 7 ch)
f
: AM
J
: CD PLAY
E
: MESSAGE PLAY
N
: MIC INPUT
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
• W
: indicates side identified with part number.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
Circuit Boards Location
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
CD-CLOSE board
MAIN board
CD board
TUNER board
SIDE-KEY board
CD-OPEN board
RELAY board
FRONT-KEY board
LCD board
TRANS board
MOTOR board
AMP board
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