Read Sony CFS-1085S Service Manual online
12
CFS-1085S
SECTION 4
DIAGRAMS
4-1. CIRCUIT BOARDS LOCATION
POWER BOARD
LED BOARD
TUNER BOARD
GE SW BOARD
VOL BOARD
MEGA BASS SW BOARD
MIC BOARD
MAIN BOARD
Note:
• All capacitors are in
• 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.
Note:
The components identified by mark
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 9V and fed with regulated dc power
supply frombattery terminal .
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark
: FM (RADIO SECTION), PLAY (TAPE SEC-
TION)
( ) : MW (RADIO SECTION), REC (TAPE SEC-
TION)
< > : SW1,2
( ) : MW (RADIO SECTION), REC (TAPE SEC-
TION)
< > : SW1,2
• 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.
tion tolerances.
• Circled numbers refer to waveforms.
WAVEFORMS
1
2
T301
Q301
B
250Vp-p
18.3
µ
sec
5.5Vp-p
18.3
µ
sec
VOLT/DIV : 50V AC
TIME/DSIV : 5
TIME/DSIV : 5
µ
sec
VOLT/DIV : 2V AC
TIME/DSIV : 5
TIME/DSIV : 5
µ
sec
• Signal path.
F
: FM
f
: AM
E
: PB
a
: REC
J
: CD/TV LINE IN
• Abbreviation
EA:Saudi Arabia
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