A
1
2
3
4
5
6
7
8
9
10
B
C
D
E
F
G
H
I
J
K
L
M
N
RX-V557/HTR-5850/DSP-AX557/RX-V457/HTR-5840/DSP-AX457
84
SCHEMATIC DIAGRAM (OPERATION)
RX-V557/DSP-AX557
★
All voltages are measured with a 10M
Ω
/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.
★ 電圧は、内部抵抗10MΩの電圧計で測定したものです。
★
s
印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、パーツリス
トに記載されている部品を使用してください。
★ 本回路図は標準回路図です。改良のため予告なく変更することがございます。
52
Display
controller
Segment
digit
select/
output
circuit
Serial
receive
circuit
Digit
output
circuit
Clock
generator
G12
51
G13
50
G14
49
48
47
P38
46
P37
45
P36
XOUT
6
VDD
8
Vcc2
18
Vss
5
Vp
64
XIN
7
3
4
/RESET
1
P35
44
9
P1
P9
17
19
P10
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
G1
63
53
G11
IC801: M66003-0101FP
FL Display Driver
2
data
timing
clock
dot data
write
scan pulse
/CEFL
CKFL
DTFL
-21.0
-28.1
-22.5
-24.2
-26.2
-24.3
-18.9
-26.2
-26.2
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-24.4
-21.0
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.2
-26.2
-26.2
-18.9
-26.3
-24.3
-22.5
-20.7
-26.3
-24.0
-26.2
-20.7
-24.3
-20.7
-22.6
-22.6
-21.0
-21.0
-20.7
-24.4
-17.1
-24.4
-26.2
-24.3
-28.1
-20.7
-28.3
-20.7
-24.4
-22.5
-22.6
-22.6
-26.2
-28.1
-26.3
-18.8
-20.7
-18.9
-24.3
-24.4
-17.0
-28.1
-20.7
-26.3
4.8
-17.1
-22.4
-20.7
-20.7
-22.6
-20.7
-28.1
-22.6
-22.5
-20.7
-22.5
-26.2
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-26.3
-28.4
-26.2
-26.2
4
.8
-24.4
-24.3
-20.7
-18.9
-26.3
-18.9
-17.0
-26.2
-26.2
4
.8
-26.2
-26.2
4
.8
-26.2
-28.1
-24.4
-24.4
-26.3
-22.6
-22.6
4.8
4.8
4.8
-24.4
-26.1
4.8
2.1
0
2.1
4.8
-20.7
-26.2
4
.8
-26.1
-24.0
4
.8
-24.9
-21.4
-28.3
-24.9
-24.4
-22.3
4
.8
-22.5
-18.8
4
.8
-18.9
00
00
4.7
0
00
00
4.9
0
4.9
AC5.6
to FUNCTION
P
age 83
G1
to FUNCTION
Page 83
J3
to SUBTR (2)
Page 88
H9
to POWER
TRANSFORMER
OPERATION (1)
OPERATION (3)
OPERATION (2)
OPERATION (4)
FL DRIVER
FL DISPLAY