Diagrams; Circuit Boards Location - Sony CFS-1085S Service Manual

CFS-1085S

4-1. CIRCUIT BOARDS LOCATION

MAIN BOARD
Note:
• 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
/ W or less unless otherwise
4
specified.
Note:
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
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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.
12
SECTION 4

DIAGRAMS

MIC BOARD
MEGA BASS SW BOARD
TUNER BOARD
LED BOARD
POWER BOARD
GE SW BOARD
VOL BOARD
• Signal path.
F
: FM
f
: AM
E
: PB
a
: REC
J
: CD/TV LINE IN
• Abbreviation
EA:Saudi Arabia
WAVEFORMS
1
T301
250Vp-p
VOLT/DIV : 50V AC
18.3 µ sec
TIME/DSIV : 5µsec
2
Q301 B
5.5Vp-p
VOLT/DIV : 2V AC
18.3 µ sec
TIME/DSIV : 5µsec