IC901
W9002
W9001
CB901
W9003
IC902
W9004
JK951
JK952
W9501
IC951
CB968
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I JK
L MN
RX-V1800/HTR-6190/DSP-AX1800
136
★ All voltages are measured with a 10MΩ/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.
FL 1/2
5.0
-23.5
5.0
-21.4
-21.9
-25.6
-29.3
-21.3
-23.4
-25.7
-25.7
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.3
-29.3
-25.2
-22.9
-25.2
-23.2
-23.5
-25.2
-25.5
-21.2
-21.2
-21.5
-27.5
-27.2
-27.5
-27.4
-23.4
-21.5
-23.5
-23.5
-22.9
-29.5
-27.5
-27.5
-27.4
-21.4
-27.5
-27.5
-27.5
5.0
0
0
4.9
4.9
2.5
0
0
0
0
0
0
0
0
0
0
0
0
-0.1 0
0
0
0
0
2.5
2.6
0
-25.5
-25.5
-23.4
-21.4
-23.4
-25.5
-27.5
-27.3
-27.0
5.0
5.0
-23.0
5.0
-27.0
5.0
-27.3
-23.4
-21.7
-21.7
-27.3-27.5
-25.7
-25.7
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.0
-22.9
0
5.1
5.0
-23.5
-23.5
-21.5
-23.4
-27.4
-27.5
-27.2
-27.5
-21.5
-21.2
-21.2
-25.5
-25.2
-23.5
-23.2
-25.2
-22.9
-25.2
-23.4
-21.3
-29.5
-27.5
-27.5
-21.4
-21.4
-27.5
-27.5
-27.5
-25.5
-25.5
-23.4
-21.4
-23.4
-25.5
-19.3
-21.2
-19.3
-23.3
-25.3
-27.3
-25.3
-27.3
-23.3
-25.3
-27.3
-25.3
-27.5
-27.3
-23.4
-21.4
-23.0
-23.5
-20.9
-25.5
-25.4
-21.4
-21.4
-21.4
-27.4
-27.4
-26.7
-27.4
-23.4
-25.4
-21.4
-23.5
-21.4
-22.9
-27.0
-27.1
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-21.7
-21.7
-21.7
-21.7
-21.7
-21.7
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-27.5
-29.3
-27.5
-23.5
-23.5
-20.9
-25.5
-25.4
-21.4
-21.4
-21.4
-27.4
-27.4
-27.5
-27.4
-23.4
-25.4
21.4
-23.5
-21.4
-23.5
-27.5
-25.3
-27.3
-25.3
-23.3
-27.3
-25.3
-27.3 5.0
0.1
0.1
4.9
4.9
2.4
2.4
0
-25.3
-23.3
-19.3
-21.2
-19.3
-27.3
-27.5
-27.1
5.0
-20.9
5.0
-26.7
5.0
-22.9
-23.4
-27.5 -23.5
-27.5 -27.5
-25.5 -27.5
-23.5
11.2
10.5
10.9
0.1
4.9
0
11.2
11.2
10.6
10.9
0.1
4.9
4.2
5.1
10.0
0.1
-9.7
9.5
0
2.6
-2.4
5.1
0
0
-9.2
5.1
4.9
0.1
5.1
0
11.2
FL (1)
FL (6)
FL DRIVER
FL DRIVER
IC901, 902: PT6302LQ-008
VFD driver/controller IC with character RAM
CONTROL
CIRCUIT
TIMING
GENERATOR 1
TIMING
GENERATOR 2
OSCILLATOR
COMMAND
DECODER
8-bit
SHIFT
REGISTER
DCRAM
16 words x 8-bit
VDD
ADDRESS
SELECTOR
WRITE
ADDRESS
COUNTER
READ
ADDRESS
COUNTER
DIGITAL
CONTROL
DUTY
CONTROL
GRID
DRIVER
PORT
DRIVER
AD
DRIVER
SEGMENT
DRIVER
CGROM
248 words x 35-bit
CGRAM
8 words x 35-bit
ADRAM
16 words x 2-bit
SG1
SG35
AD1
AD2
P2
GR1
GR16
P1
VSS
VEE
RSTB
DIN
CLKB
CSB
OSCI
OSCO
*
INTERNAL 400kW PULL-UP RESISTOR
ON EACH TTL/MOS INPUT
**
INTERNAL 5kW PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
V
CC
+5V TO +10V
VOLTAGE DOUBLER
+5V TO –10V
VOLTAGE INVERTER
C1+
C1–
V+
V–
C2+
C2–
T1
ADM2xx
T2
R1
R2
0.1µF
0.1µF
0.1µF
GND
TTL/CMOS
OUTPUTS
R1
OUT
R2
OUT
T1
OUT
T2
OUT
R1
IN
R2
IN
T1
IN
T2
IN
TTL/CMOS
INPUTS
*
RS-232
OUTPUTS
RS-232
INPUTS
**
0.1µF
+5V INPUT
0.1µF
EN
SHDN
(ADM242)
(ADM222, ADM242)
IC951: ADM222ARZ
High speed RS-232 line drivers/receivers
to POWER (1)_CB12
Page 128
A5
to OPERATION (5)_CB809
Page 126
RS-232C
I4
to FL (2)_CB970
Page 137
K4
to OPERATION (4)_CB812
Page 126
K3
to OPERATION (1)_CB801
Page 126 B2
to FUNCTION (1)_CB405
Page 122 C9
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