Toshiba 1550 Service Manual page 172

Logic Circuit (PWA-F-LGC) 5/8
1
A
+24V
R4
1/10W22K
R6
1/10W4700
GND
B
TH+
[TH+]
THM-VREF
[THM-VREF]
TH-
[TH-]
C
HTR-ON
[HTR-ON]
D
SCN-H
[SCN-H]
SCN-L
[SCN-L]
SCN-D
[SCN-D]
SCN-B
[SCN-B]
SCN-C
[SCN-C]
SCN-A
[SCN-A]
E
F
1
Mar. 1998 © TOSHIBA
2 3
D1
VDD
1SS184
2 3
1
R21
1/10W22K
5
R5
1/10W6800
1 2 6
RTP
1
C7
R24
CC0.1/25 2 C
1/10W22K
GND
GND
VDD
R26 1/10W1M
1 2
RTP
VDD
R7
1/10W10K
R170 1/10W4700
1 RTP 2
8
75393F
R28 1/10W3900 R25
1 2 1 2 3
RTP RTP
1
VCC
1/10W1000 1
VEE
2 C 2
IC6
4
C12
CC0.1/25
R27
1/10W4700
C11
1 R8
CC0.1/25
1/10W3300
2 C
R29
+5VSW GND
1/10W3900
4700
GND GND GND 2
1 Q8 RN1401
4700
4700 3 1
RN2401
4700
VDD
1SS181
R11
R31 1/10W4700
1 RTP 2
1 1/10W1500
R35 1/10W4700
1 RTP 2
2 3
D2
R10
1/10W2700 +5VSW
1
1 C8
C10
R9
CC0.1/25
CC0.1/25 1/10W180 2 C
2 C
GND GND GND
2 3
HINT
How to search for where a signal in a
circuit diagram has jumped to.
4 5
R23
1/10W560K
1 RTP 2 VDD
VDD
R22
8 1/10W1000
75393F
VCC
7 +24VCHK
[+24VCHK]
VEE
IC6
4
GND
HTR-RDY
[HTR-RDY]
1 +5VSW
2 C
4700
2
Q3
RN1401 3 1
4700
1 4700 3 SSR+
Q1 [SSR+]
RN2401
2
4700
GND
3 SSR-
[SSR-]
Q9
2
GND
VDD
R15 1/10W4700
1 2
RTP
R13
1/10W4700
1 RTP 2
R14 1/10W4700
1 RTP 2
R12 1/10W4700
1 2
RTP
16 7 SCN-MOT-D
NB ONB [SCN-MOT-D]
14 6 SCN-MOT-B
B OB [SCN-MOT-B]
15 3 SCN-MOT-C
NA ONA [SCN-MOT-C]
13 2 SCN-MOT-A
A OA [SCN-MOT-A]
11 10
VREF1 TB1
9 8
VREF0 TB0
+24V
1
VCC
4
PG
5 1
SG C1
IC7 CE22/35
2
6712MK3
6712G
[6712G]
4 5
6 7
6 7
14 - 5
8
A
B
C
D
E
F
5
8
8
1550/1560 CIRCUIT DIAGRAMS