Yamaha PW8 Service Manual page 31

H G
DC2 CIRCUIT DIAGRAM (PW8)
1
2
(Orange)
(Orange)
(Blue)
(Blue)
to Transformer
3
(Secondary)
4
5
28CC1-2001033804-2
6
6
F E
not installed
OP AMP
OP AMP
D C
to Fan (L)
OP AMP
OP AMP
: Mylar Capacitor（マイラーコンデンサー）
B A
PW8
D25XB60 (VR14990R)
DIODE STACK 25.0A 600V
DC2: D201
to AC2-CN201
FMU-22S (WD88620R)
to DC1-CN101 DIODE STACK 10A 200V
DC2: D209
2SC2240 (IC224030)
TRANSISTOR
DC2: Q210–214
2
3
1: EMITTER
1
2: COLLECTOR
2
1 3: BASE
2SC5395 (V2797700)
TRANSISTOR
DC2: Q205–208, Q216
to AC1-
CN104
2
3
1: EMITTER
1 2: COLLECTOR
2 3
3: BASE
1
2SD1913 (VC407900) 2SB1274 (VC614000)
TRANSISTOR
TRANSISTOR
DC2: Q215 DC2: Q204, Q218
1
2
3
2 2
1
1
1: BASE 1: BASE
1
2
2: COLLECTOR 2: COLLECTOR
3
3
3 3: EMITTER
3: EMITTER
ISA1993AS1 (WK608600) 2SC3519A (WK608700)
TRANSISTOR
TRANSISTOR
DC2: Q217 DC2: Q202, Q203, Q209
2 2
3 1
1: EMITTER 1: BASE
1 1 2: COLLECTOR
2: COLLECTOR
2
2 3
3
3: BASE 3 3: EMITTER
1
DC2 CIRCUIT DIAGRAM (PW8)