Schematic Diagram (Operation) - Yamaha RX-V550 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