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Yamaha A-S2100 Service Manual page 51

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A
B
1
2
3
4
5
• See page 77–80 →
FUNCTION
SCHEMATIC DIAGRAM
AC IN
6
7
C
D
E
Power Supply Sections Block Diagram
Power transformer
D305
-60V (about)
Screw
PBGND
+CCPS
+30V (about)
D306
- 30V (about)
D6
ST503
Rear panel
MG
D301
D302
RY1
F1
D334
D335
+9V
D765–D768
C3
Sub-transformer
RY1
MG
MG
POWER
Q2
switch
F
G
+PB
+60V (about)
+PB
Power Amplifier PRE
C317
+HPB
HP Amplifier
-HPB
HP Amplifier
C318
-PB
Power Amplifier PRE
-PB
HP_GND
Pin jack
Rear panel
AGND
LINE1+20V
L
Input buffer
+12REC
Rec out buffer / Rec_MT
C319
LINE1-20V
LINE1-20V
Input buffer
-12REC
Rec out buffer / Rec_MT
LINE2+20V
LINE2+20V
Pre amp buffer / MAIN_MT
+12PRE
Pre out buffer / Pre_MT
C320
Pre amp buffer / MAIN_MT
LINE2-20V
LINE2-20V
-12PRE
Pre out buffer / Pre_MT
-CCPS
LVOL+18V
LVOL+18V
VOL Lch
LVOL-18V
LVOL-18V
VOL Lch
RVOL+18V
RVOL+18V
VOL Rch
RVOL-18V
RVOL-18V
VOL Rch
MC+18V
MC+18V
MC Amplifier
MC-18V
MC-18V
MC Amplifier
MM+20V
MM+20V
MM Amplifier
MM-20V
MM-20V
MM Amplifier
+12D
+12D
RELAY/Meter LED
IC1
C12
+5D
LED_MT/INPUT_LED
C9
-12D
Relay
-12D
IC2
+B1
Power Amplifier Rch
C309
-B1
Power Amplifier Rch
+B2
Power Amplifier Rch
C310
-B2
Power Amplifier Rch
+B3
Power Amplifier Lch
C327
-B3
Power Amplifier Lch
+B4
Power Amplifier Lch
C328
-B4
Power Amplifier Lch
IC506
+5.6V
+5M
Microprocessor/Standby LED
IC504
+5S
+5S
Control Around Microprocessor
RY_PWR
Toneconl/VOL/Expanded IC
STBY_CNT
H
I
• See page 81 →
MAIN
SCHEMATIC DIAGRAM
J
A-S2100
51

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