Yamaha HTR-5740 Service Manual - Page 31

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Yamaha HTR-5740 Service Manual
A
B
C
RX-V550/HTR-5750/RX-V450/HTR-5740/DSP-AX450

SCHEMATIC DIAGRAM (OPERATION)

RX-V550
1
2
3
~
-22.0
-26.0
-22.0
-24.1
-18.2
-18.2
~
-18.2
~
4
-22.0
-20.1
4.8
4.8
-22.1
~
~
~
-26.0
-25.8
5
0
0
6
0
5.1
7
8
9
10
# 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.
s
80
D
E
F
FL DISPLAY
-26.0
-24.1
~
-22.1
FL DRIVER
-22.1
-22.1
-24.1
~
4.8
2.1
2.1
0
4.8
4.8
4.8
4.8
5.1
Page 77
J9
to FUNCTION (2)
G
H
4.8
4.8
~
~
-20.8
-18.2
-20.3
-22.5
-22.5
4.8
4.8
~
~
-24.0
-18.1
-16.0
0
4.7
Page 76
L3
to FUNCTION (1)
I
J
K
to Power Transformer
0
0
0
0
Page 76
I2
to FUNCTION (1)
x: NOT USED
O: USED / APPLICABLE
0
0
0
0
0
0
0
0
IC801: M66003-0101FP
FL Display Driver
Display code
(8-bit x 60)
Code
write
CS
2
Serial
data
SCK
receive
3
Code/
circuit
SDATA
4
command
control
circuit
XIN
7
Clock
timing
Display
generator
clock
controller
XOUT
6
RESET
1
Vcc1
8
Vcc2
18
Vss
5
Vp
64
L
M
N
RAM
CGROM
(35 bit x 166)
44
SEG00
Segment
19
SEG25
output
17
SEG26
circuit
CGROM
SEG34
dot data
9
(35 bit x 16)
write
SEG35
45
DIG11/
52
SEG42
DIG12/
51
SEG41
code
Segment
DIG13/
50
select
digit
SEG40
select/
DIG14/
49
output
SEG39
circuit
DIG15/
scan pulse
48
SEG38
DIG16/
47
SEG37
DIG17/
46
SEG36
63
DIG00
Digit
output
circuit
53
DIG10