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Block Diagrams - Yamaha A-S2100 Service Manual

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A-S2100

■ BLOCK DIAGRAMS

1
• See page 75, 76 →
INPUT
SCHEMATIC DIAGRAM
RYB1_PLTY
2
BAL
L/R
Phase change
(normal/inv.)
MC±18V
MC
PHONO
Head amplifier
L/R
3
RY_MM/MC
CD L/R
TUNER L/R
LINE1 L/R
LINE2 L/R
MAIN IN
4
LINE2 OUT
L/R
(REC)
PRE OUT
Rear panel
AUTO POWER STANDBY
ON
OFF
5
ATTENUATOR
BYPASS
ATT.
PHASE
NORMAL
INV.
TRIGGER
IN
IN
REMOTE
OUT
SYSTEM CONNECTOR
6
BASS
TREBLE
BALANCE
INPUT
VOLUME
Selector
Front panel
7
50
C
D
Input selector
VOLUME
Buffer amplifier/
UNBALANCE
BALANCE
CONVERTER
ATT. unit 1 L
Hi: 18.6dB
Low and Unbalance: 12.5dB
RY_BAL_GAIN
ATT. unit 2 L
LINE1±20V
RY_SEL_BAL
ATT. unit 3 L
MM EQ
Amplifier
LINE1±20V
MM±20V
ATT. unit 1 R
RY_BAL_
RY_CD_
ATT. unit 2 R
RY_TU_
RY_LINE1_
RY_LINE2_
RY_MDIR_
REC OUT Buffer
RY_PHONO
AMP GAIN:-12.2dB
LINE1±20V
ATT. unit 3 R
N_REC_MT
N_MT_PRE_
Protection
Control
INDEPENDENT REGULATED POWER SUPPLY (for AUDIO)
Microprocessor
+5M
D11
IC504
+5S
+5M
+5M
+5S
STBY_CNT
Sub-transformer
+5M
MUTE
PHONO
MM/MC
Remore
control sensor
PHONES
SPEAKERS
METER
TRIM
OFF/VU/PEAK
AC IN
OFF/A/B/A+B
• See page 82, 83 →
FRONT
FUNCTION
SCHEMATIC DIAGRAM
E
F
AUDIO Section Block Diagram
Buffer amplifier
TONE CONTROL
FLAT
AMP GAIN: 1.58dB
LINE2±20V
MAIN_MT
RY_TCBYP
VOL1±18V
AMP GAIN: 1.58dB
LINE2±20V
MAIN_MT
VOL2±18V
BALANCE
UNBALANCE
LINE2±20V
AMP GAIN: 0.2dB
POWER TRANSFORMER
D307
reg
D6
+12D
-12D
reg
POWER
RY_PWR
POWER relay
• See page 77–80 →
SCHEMATIC DIAGRAM
G
H
I
FRONT
FLOATING BALANCE
DISCRETE AMPLIFIER
SP A L ch
RY_SPA
±PB
SP B L ch
RY_SPB
SP A R ch
RY_SPA
±PB
RY_SPB
SP B R ch
PK/N_VU
METER_MT
AMP GAIN: 15.9dB
METER_ATT
±PB
METER_MT
LOW IMPEDANCE DRIVE
N_HP_DET
±12D
HEADPHONE AMPLIFIER
METER DRIVER
FLOATING POWER SUPPLY
R CH
D301
PSVA1
PSVA2
D302
R CH
±B
+
L CH
D334
D335
L CH
+
D305
+PB
±PB
- PB
J
• See page 82, 83 →
SCHEMATIC DIAGRAM
SPEAKER OUT
L CH
+
A
+
B
SPEAKER OUT
R CH
+
A
+
B
PHONES
METER
METER UNIT
• See page 81 →
MAIN
SCHEMATIC DIAGRAM

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