Yamaha F-20B Service Manual - Page 16
Browse online or download pdf Service Manual for Amplifier Yamaha F-20B. Yamaha F-20B 16 pages. Remote control attachment kit
Also for Yamaha F-20B: Owner's Manual (7 pages), Installation Manual (12 pages)
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A
B
<P.1>
OVERALL CIRCUIT DIAGRAM
MAIN
1/2
INPUT
POWER ON/OFF
Note: See parts list for details of circuit board component parts.
F-20B
C
GAIN SELECT
OP AMP
OP AMP
BASS
OP AMP
OP AMP
J, U, C
S, BS
250V 315mA 250V T160mA L
TRANS
FORMER
D
E
OP AMP
OP AMP
LOW MID
HIGH MID
TREBLE
OP AMP
VOLUME
F
G
D2SBA20 (VP344100)
DIODE STACK 1.5A 200V
OP AMP
AUX IN
MAIN
2/2
HIFI AMP
KEC-54238
PHONES
4 SPEAKER
KEC-54238
WARNING
Components having special characteristics are marked
replaced with parts having specifications equal to those originally installed.
H
F-20B
1
DB1
2
3
4
5
and must be
F-20B