Block Diagram - Yamaha AS1000BL Service Manual

A B
1
I BLOCK DIAGRAM
• See page 59-61 →
FRONT
SCHEMATIC DIAGRAM
2
Q1001-1016
RY101
MC
HEAD AMP
RY_PHONO
PHONO
Q1017-1038
L/R
RY102
POL/POR
EQ AMP
RY103
RY_MMMC
MM/MC
CD L/R
3
TUNER L/R
LINE1 L/R
LINE2 PB L/R
IC301
LINE2 REC OUT L/R
BUFFER AMP.
4
PRE OUT
MAIN IN
PRD THM HP_PRD
RY_DIR
RY_BYP
54 53 2,3 1,64 62,63
RY_UNBAL 34
RY_BAL 32
IC502
RY_CD 26
MICRO
RY_TU 27
PROCESSOR
5 RY_L1 28
RY_L2 29
RY_MMMC 55
RY_PHONO 56
LED_PWR
REM
IC501
3,4
SP_AB 15
6
SPEAKER
TREBLE
BASS
REMOTE
7 • See page 59-61 →
FRONT PANEL
FRONT
SCHEMATIC DIAGRAM
C D
VOLUME & TONE CONTROL
IC410
ATT.1
IC411
ATT.2
IC412
ATT.3
INPUT BUFFER
RY_CD
RY_TU
RY_L1
RY_L2 INPUT
SELECTOR
PSVA1 PSVA2
48 47
60 PRV1 PRV
17
16 RY_PWR
35
RY_HP
4
RY_SPA
5
RY_SPB
INDEPENDENT REGULATED POWER SUPPLY
(for AUDIO)
PDET
9-11
SUB-TRANSFORMER
T1
AC IN
INPUT SEL
BALANCE VOLUME
VR501
• See page 55-57 →
FUNCTION
SCHEMATIC DIAGRAM
E F
FUNCTION
IC404
TONE CONTROL DEVICES
RY_BYP
RY402
IC405
FLAT
IC406
LINE AMP.
COLD(-)
IC413
IC302
IC303
BALANCE UNBALANCE
CONVERTER
PRV
POWER TRANSFORMER
+33V
-33V
D305
PRV
D304
(for POWER AMP
/ VOLTAGE AMP STAGE)
POWER SWITCH
RY1
G H I
• See page 55-57 →
SCHEMATIC DIAGRAM
FLOATING BALANCED
POWER AMPLIFIER
RY_DIR
RY404
HOT(+)
RY403
PRD PRI THM
IC414 RY501
RY_HP
HP END
LOW IMPEDANCE DRIVE
HEADPHONE AMP.
INDEPENDENT
FLOATING POWER SUPPLY
L CH
+B3/-B3
D335 for HOT
L CH
+B4/-B4
D336 for COLD
R CH
+B1/-B1
D300 for HOT
R CH
+B2/-B2
PSVA1
for COLD
D301
PSVA2
+12V
IC51
to SPEAKERS RELAY
IC52
D306
-12V
PRV
J
A-S1000
• See page 59-61 →
FRONT
SCHEMATIC DIAGRAM
SPCH A L/R CH
RY201/R111
SPEAKERS L/R CH
SPCH B L/R CH
RY202/R112
RY_SPA
+
RY_SPB
A
-
+
B
-
to POWER AMP.
R CH
PHONES
JK501
MAIN
• See page 58 →
SCHEMATIC DIAGRAM
FUNCTION
• See page 55-57 →
SCHEMATIC DIAGRAM
35