Yamaha PW8 Service Manual page 28

H G
BLOCK DIAGRAM (PW8)
AC3
POWER
ON/OFF
CN301 (4P)
CN102 (4P)
J
TH101
U,H,B,O,A
AC Inlet
F101
1
250V
not installed
3
T101
FG
Sub
Transformer
+15V -15V +12V +48V
28CA1-2001032797-1 1
F E
DC1
Main
Transformer
F102
RE
3
250V
BL
1
F103
RE
2
250V
Primary Secondary
（一次側） （二次側）
AC1
RY101
J: YE
U: BR
H,B,O: BE
3 A: RE
+24V
DC2
Remote
Control
F202
OR 1
250V
1 GY
OR 2
F201
BE 3
250V
Diode
D202 ‒ 205
BE 4
AC2
Green
CN201 (7P)
D C
Q102N, Q103N
Diode Bridge 1
x
D108
Heat sink TO-3P 2 Heat sink
x
TO-220F 1
x
Heat sink
+15V
+25VDC
D101
Regulator
C105
Voltage
ZD105,
22000uF/35V ZD106 Detection
C106 Voltage
ZD107,
ZD108 Detection
22000uF/35V
-15V
Regulator
-25VDC
TO-220F 1
x PR101
Heat sink
Posistor
TO-3P 2 Heat sink
x
Thermal
Q102P, Q103P
Detection
(Heat sink)
(2P)
CN104 CN101 (6P)
Fan
Fan
(L) (R)
24VDC
CN205 CN204 (6P)
(2P)
Fan Control
Diode Bridge 1
x
Heat sink
Q202, Q203
D209
TO-3P 1 Heat sink
x
D201 TO-220F 1
x
Heat sink
+22VDC +12V
Regulator
C205
Voltage
ZD204,
22000uF/ Detection
ZD205
35V
Q209, Q215
TO-3P 1, TO-220F 1
x x
Heat sink
D212
4
x
Diode 1
x
+69VDC +48V
Regulator
C206
Voltage
ZD214,
Detection
2200uF/ ZD215
100V
CN202 (7P)
B A
PW8
+15V
15G
-15V
+12V
12G
DC OUTPUT (M)
+48V
48G
REMOTO
REMOTO
FG
FG
+15V
15G
-15V
+12V
12G
DC PARALLEL INPUT (F)
+48V
48G
REMOTO
REMOTO
FG
FG
BLOCK DIAGRAM (PW8)
3
1
2
3
4
5
6