Yamaha HTY-7040, Service Manual

Page: 91 / 129

IC902
W991 CB903
CB902
IC901
IC951
CB951
W951
W952
W891 CB852
W851
JK891
IC852
IC852
IC851
IC802
IC802
JK802
JK801
IC801
IC801
CB801
CB802
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
YSP-4000/YSP-40D/HTY-7040
91
★
All voltages are measured with a 10M
Ω
/V DC electronic voltmeter.
★
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.
POWER 2/2
5.9
5.8
0
5.9
5.9
5.8
11.7
5.1
5.2
11.7
5.2
0 0
0 0
5.9
5.1
5.1
5.1
0
0
5.1
11.7
11.5
11.5
7.0
10.4
9.6 9.6 9.3
11.5
11.5
10.5
5.9
0
6.0
5.9
6.0 6.3
0
6.5
11.2
0
11.5
11.1
10.5
0
6.3
11.5
11.3
5.8 5.8
11.3
5.5
11.3
-30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.1 -30.1 -30.1 -21.8 -25.9 -25.9 -27.9 -21.9 -20.0 -27.9 -29.9 -27.9 -20.1 -22.0 -26.0 -25.9 -25.9 -22.0 -23.9 -25.8 -22.0 -26.0 -22.0 -20.0 -27.9 -27.9 -29.9 -20.0 -20.0 -23.7 -29.8 -23.7 -20.0 -21.9 -27.8 -27.8 -29.7 -20.1
-24.4
-24.4
3.3
-30.1
-27.8
3.3
-30.1
-30.4
-30.1
-30.3
-26.0
-25.9 -25.9 -22.0 -23.9 -25.8 -22.0 -26.0 -22.0 -20.0 -27.9 -27.0 -29.9 -20.0 -20.0 3.3
-29.8 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -30.0 -32.4
-24.0
-22.0
-20.1
-27.9
-29.9
-27.9
-20.0
-21.9
-27.9
-25.9
-25.9
-21.8
-30.3
-30.4
-30.0
-23.7
-20.0
-22.0
-27.8
-27.8
-29.8
-20.2
3.3
1.6
1.6
0
0
3.3
3.3
3.3
3.3
-20.1
-20.2
3.3
-29.7
-29.8
3.3
-23.7
-24.0
3.3
-21.9
-22.0
3.3
-29.8
-30.0
5.4
-32.1
-26.2
5.5
5.4
0.2
0
5.4
0
5.5
11.6
0
3.3 3.3
0
3.3 3.3
3.3
3.3
0
3.3
3.3
52
Display
controller
Serial
receive
circuit
Digit
output
circuit
Clock
generator
DIG11/
SEG42
51 DIG12/ SEG41
50 DIG13/ SEG40
49 DIG14/ SEG39
48 DIG15/
SEG38
47 DIG16/
SEG37
46 DIG17/
SEG36
45 SEG35
XOUT 6
Vcc1 8
Vcc2 18
Vss 5
Vp 64
XIN 7
CS
SCK 3
SDATA 4
RESET 1
SEG00 44
9 SEG34
SEG26 17
19 SEG25 Segment
output
circuit
Display code
RAM
(8-bit x 60)
CGROM
(35-bit x 166)
CGROM
(35-bit x 16)
code
select
Code
write
Code/
command
control
circuit
DIG00 63
53 DIG10
IC901 : M66003-0131FP-R
18 digit 5 x 7 segment VFD controller/driver
2
data
timing
clock
dot data
write
scan pulse
Segment/
Digit
select/
output
circuit
IC801, 802 : NJM2068MD-TE2
Dual operational amplifier
OUT
1
OUT 2 –IN 1
+IN 1
+IN 2
-IN
2
–V CC
+V
CC
1
2
3
4
8
7
6
5
+ – + –
1
3
2
5
4 GND
A B Y
V
CC
IC902: TC7SH08F
2-input AND gate
IN A
IN B
OUT Y
L L L
L H L
H L L
H H H
1
2
3
5 4
7
6
8
1. A OUTPUT
2. A -INPUT
3. A +INPUT
4. GND
5. B +INPUT
6. B -INPUT
7. B OUTPUT
8. V +
IC852 : NJM2717M
Single supply single high-slew rate operational amplifier
1 5
2
3 4
1. OUTPUT
2. GND
3. +INPUT
4. -INPUT
5. V
+
IC851 : NJM2716F
Single supply high-slew rate single operational amplifier
1
DC input
(Vin)
GND
DC output
(Vo)
3
5
IC951 : PQ012GN01ZPH
Low power loss regulator
2
Bias power supply
(VB)
IC
POWER (4)
POWER (2)
POWER (6)
POWER (5)
POWER (7)
POWER (3)
STANDBY/ON
VOLUME– INPUT
DRIVER
to INPUT_CB7
Page 85 J2
to INPUT_CB6 P
age 85
J2
to INPUT_CB12
P
age 85
J8
(B model)
to INPUT_CB8 P
age 85
J3