Epson TM-H6000 - RS-232 I;F Circuit Board Assembly (UB-S01) Circuit Diagram

Rev. A Circuit Board Unit Circuit Diagrams Appendix H-8
TM-H6000/H6000P Service Manual
Confidential
RS-232 I/F Circuit Board Assembly (UB-S01) Circuit Diagram
TP2
DK 1
1
DK S
2
PG
3
PG
4
+24V
5
+24V
6
PG
7
HOST RTS
8
CTS
9
RTS
11
I/F DET
10
CLKOUT/DTR
12
CLKREQ
13
SG
14
+5V
15
DK 2
16
DK G
17
DK P
18
PG
19
+24V
20
+24V
21
PG
22
SG
23
SD
24
RD
25
(RES)
26
#25_RESET
27
DSR_RESET
28
#RESET
29
SG
30
CN2
DSR
RTS
TO MAIN BOARD
DSR
+12V
+5V
C1
VCC
16
C2+
4
C2-
5
R1I
13
R2I
8
T1O
14
T2O
7
GND
15
V+
2
C1+
1
C1-
3
R1O
12
R2O
9
T1I
11
T2I
10
V-
6
U1
C2
C7
DSR
SD
RD
DTR
FG
1
SD/SD1
2
RD/SD2
3
RS/RD1
4
/RD2
5
DR/INIT1
6
SG
7
/DR1
8
/DR2
9
/CS1
10
/CS2
11
12
13
14
15
16
17
18
19
ER
20
21
22
23
24
INIT2
25
SHELL
0
CN1
SG
RTS
TO HOST
C3
DTR
SD
DSR
RD
+
1
2
V
SG
RTS
DTR
SD
RD
+5V
+
5
V
+
5
V
SG
RTS
SG
DSR_RESET
#25_RESET
C5
R1
R21
Q1
RD
SD
DTR
R
T
S
+5V
SG
SG
SG
TP1
10K
10K
+12V
-12V
R7
R3
10K
10K
Q2
+
5
V
+12V
RTS
#
2
5
|
R
E
S
E
T
D
S
R
|
R
E
S
E
T
D1
D2
R5
R2
R16
R4
R17
R18
C6
3
2
1
8
4
U2A
R20
S
G
DSR
R11
#25INIT
D3
D4
-12V
R13
R14
R6
R15
C4
R10
R19
R12
5
6
7
U2B
SG
+12V
-12V
R9
R8
-12V