Block Diagram; Schematic Diagram - Yamaha RX-777 Service Manual

A B
RX-777
1

BLOCK DIAGRAM

• See page 26, 27 → SCHEMATIC DIAGRAM
2
TUNER
PAC
• See page 25 → SCHEMATIC DIAGRAM
INPUT
DVD
IC507
w
D-TV
VIDEO
SEL
3
VCR e
(MONI)
MONITOR
OUT
IC508
w
VCR VIDEO
SEL
OUT
e
(REC)
ZONE2
OUT
4
IC506 : EQ AMP
IC502 : CD DIRECT AMP
IC509-512 : BUFFER AMP
TUNER
5 IC506
PHONO
RIAA
IC502
CD
10dB
IC509
DVD
0dB
IC503
IC510 Input
Selector
D-TV
!3 ! 4 ! 5
0dB
IC511
VCR
0dB
6 IC512
A CE,
TAPE/MD
CLK,
0dB
DATA
IC504
Recout
TAPE/MD
Selector
OUT
!3 ! 4 ! 5
Q503, 504
/D-REC2
VCR
OUT
Q505, 506
/D-REC1
ZONE2
OUT
Q311, 312
/R2MU
7
23
C D
+LB
Q308,
OPERATION D308
Q516,
Q313,
REG REG
D502
D316
REG
+5V +12V +12V
TUNER TUNER VIDEO
q
FL w
V301
$0
!5 @5 %7 $1
-@0 -
SW316
STANDBY/ON
T MU,
OPERATION KEY
T CE,
SW301-306, 307-315
T DO, XL301
CLK,
STEREO, 4MHz
DATA
TUNED
^4 ^ 5 ^ 8 @1 !4 !5 @9 %7 - ty
^2 ^ 3
Vin2 /RESET
^0
!0
RESET
Vin1
^1 PD
@3
SW317 Vcc
r
!6
REC SEL
/VCR PRPS
&6
*0
IC301
µ-COM
VREC2
%8
REM
o
VREC1
%9
A CE, CLK, DATA PRI
&5 ^ 6 ^ 7 &8
PRDC
&9
VRdn
&1
VRup Bin, Ain
&2
!9 @ 0
SW318
Input
Sel
• See page 25 → SCHEMATIC DIAGRAM
PRE-MAIN
t y
VR401 VR402 VR404 VR403 COUPLER
BASS TREBLE LOUDNESS BALANCE
IC405
IC406
MOTOR
DRIVE
BUFFER
w!0
IC401
t u
e q
VR405
VOLUME
E F
+B
PRPS
-B
-27V
VRP
+LB
+15
PRPS
+5V REG
+12s
Q305
IN
+5V REG
-15
Q306
REMOTE
CONTROL
OUT
VRG
REMOTE
U301
INPUT
PROTECTION
Q127-129
IC501
BUFFER Q132-137
D107, 110,
113-115, 126, 128
Power Amp
35dB
Q103-126,
D101-106
+
SW401
SW402
CD DIRECT
PURE
–
AMP
DIRECT
PDon, CDon
24
G H
12000/
63
D120
12000/63
Q145,
D131
REG
Q130,
D116-119
D121
REG
F101
REG
Q131,
D122
+12s
RY104
Q142
RY101
+
A
–
SPEAKERS
RY102
+
• See page 28 → SCHEMATIC DIAGRAM
B
–
RY103
PHONES
SPEAKERS
A
B
I J
AC IN
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