Read Sony CFS-1085SMK2 Service Manual online
12
CFS-1085SMK2
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
DC IN 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.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise specified.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 9 V and fed with regulated dc power supply
from battery terminal.
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : FM (RADIO SECTION), PLAY (TAPE SECTION)
(
no mark : FM (RADIO SECTION), PLAY (TAPE SECTION)
(
) : MW (RADIO SECTION), REC (TAPE SECTION)
<
> : SW1,2
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Circled numbers refer to waveforms.
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
• Signal path.
F
: FM
f
: AM
E
: PB
a
: REC
J
: CD/TV LINE IN
• WAVEFORMS
T301
VOL/DIV : 5 V AC
TIME/DIV : 5
TIME/DIV : 5
µ
sec
2
Q301
B
VOL/DIV : 2 V AC
TIME/DIV : 5
TIME/DIV : 5
µ
sec
1
25Vp-p
18.3
µ
sec
5.5Vp-p
18.3
µ
sec
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