Yamaha RX-V2500 Service Manual page 75

A B C
SCHEMATIC DIAGRAM (OPERATION)
1
2
3
3.0 3.0 5.1
0
0
0 5.1 5.0
4
5.1 5.1 5.1
-28.7 -28.8 -28.6
-28.9 -28.9 -29.1
5
6
OPE (1)
7
8
OPE (2)
9
10
D E F
5.0 5.0
-20.6 -12.9
-20.1 -12.8
-26.8 -16.8
-8.6 -22.7
-16.7 -16.5
-24.7 FL DRIVER -12.7
-16.6
-28.8
-30.9 -16.6
-8.7
-24.6
5.0 5.0
-12.9 -20.8
5.0
-16.8
2.2
-10.7
-12.9
-20.0
2.2
-12.8 -20.6 -12.9
0
-12.5
-20.7 0
-22.9 0
-28.7 5.0
-28.8 5.0
-28.8
B, G models only
U, C, A models only
Page 76 D7 Page 77 G2
to MAIN (1)_W220 to POWER (7)_CB131
U, C, A, B, G models only
OPE (5)
Page 77 A5
to POWER (1)_CB41
G H I
Page 80 H6
to CONTROL_CB508
5.0
-12.8
-12.5
Page 74 B7
to FUNCTION (3) – C-F_CNCT –
CB527
O : USED / APPLICABLE
X : NOT USED
J K L
IC901: M66003-0101FP
FL Display Driver
OPE (3)
SCK
SDATA
5.0
5
1 0
4
5.0
2 0
3 0
XOUT
RESET
Vcc1
Vcc2
IC902: SN74AHCT1G32DCKR
2-Input or Gate
A
B
GND
IC903: NJM4556AL
Dual OP-Amp
–INPUT
+INPUT
IC904: µPC4570G2
Dual OP-Amp
OUT
–IN
+IN
–V
11.8 9.3
9.3
8
3
0
1
2 0
0
0
0.7
0
0
0.7
0
6
0
7
5 0
0
4
9.6
-12.0 -9.6
5.1
11.8 0
0
0
0
0
0
0
-12.0
OPE (4)
★ All voltages are measured with a 10MΩ/V DC electronic volt meter.
★ Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
M N
RX-V2500/DSP-AX2500
Display code
RAM CGROM
SEG00
(8-bit x 60) (35 bit x 166) 44
Segment 19 SEG25
Code
output
write
17 SEG26
circuit
CGROM
dot data 9 SEG34
CS 2 Serial data (35 bit x 16)
write
3 receive
Code/
circuit
4
command
45 SEG35
control
circuit
DIG11/
52
SEG42
DIG12/
51
SEG41
code Segment DIG13/
50
select SEG40
digit
select/ DIG14/
49
XIN 7 Clock SEG39
timing Display output
generator clock scan pulse circuit DIG15/
6 controller 48
SEG38
DIG16/
47
SEG37
DIG17/
46
SEG36
63 DIG00
Digit
1 output
circuit
8
53 DIG10
18
Vss 5
Vp 64
1 5 Vcc
2
3 4 Y
V+
8
2, 6 OUTPUT
1, 7
3, 5
V–
4
1 8 +V
1 CC
2 OUT
1 7 2
+ – + –
1 3 6 –IN 2
4 5 +IN
CC 2
75