Service manual

REV.-A
See Table 1-14 for CNI (Centronics interface).
Table A-2.
CN2 (BOARD ASSEMBLY, C094 MAIN)
No.
1/0 Signal Name
Function
1 - +5
+5
VDC
2 - +5 +5 VDC
3 - +5 +5 VDC
4 - +5 +5 VDC
5 - +5 +5 VDC
6 - +5 +5 VDC
7 0
TXD Transmit Data
8 0 READY
Ready to Receive Data
9 I RXD Receive Data
10 - NC
No Connection
11 0
RST Reset
12 0
INH Inhibit
13 I
CMREQ Command Request
14 I
WRRDY Write Ready
15
I RDREQ
Read Request
16 0 WR
Write
17
0 m
Read
18 0 Cs
Chip Select
19 -
GND Signal Ground
20 -
GND Signal Ground
21 -
GND
Signal Ground
22 -
GND
Signal Ground
23 -
GND Signal Ground
24 -
GND
Signal Ground
25 0 A3
Address Bus Bit 3
26 0 A2
Address Bus Bit 2
27 0 Al
Address Bus Bit 1
28 0 AO
Address Bus Bit O
29 1/0 D7
Data Bus Bit 7
30 1/0 D6
Data Bus Bit 6
31 1/0 D5
Data Bus Bit 5
32 1/0 D4
Data Bus Bit 4
33
1/0 D3
Data Bus Bit 3
34
1/0 D2
Data
Bus Bit 2
35 1/0 D1
Data Bus Bit 1
36
1/0
DO
Data Bus Bit O
Table A-3. CN3 (BOARD ASSEMBLY, C094 MAIN)
No. 1/0 Signal Name
Function
1 -
GND
Signal Ground
2 I
PEF
Paper End, FRONT
Table A-4.
CN4 (BOARD ASSEMBLY, C094 MAIN)
No.
1/0 Signal Name
Function
1 -
GND Signal Ground
2 I
Lsw Release Lever Position
Table A-4. CN5 (BOARD ASSEMBLY, C094 MAIN)
No. 1/0 Signal Name
Function
1 -
GND Signal Ground
2 I
GSW Platen Gap Adjust Lever
Table A-6.
CN6 (BOARD ASSEMBLY, C094 MAIN)
No. 1/0 Signal Name Function
1 0
PF A
PF Motor Phase A
2 0
PF ~
PF Motor Phase ~
3 0
PF B
PF Motor Phase B
4 0
PF ~
PF Motor Phase ~
5 0
PFCOM
PF Motor Common
6 0
PFCOM
PF Motor Common
Table A-7.
CN7 (BOARD ASSEMBLY, C094 MAIN)
No. 1/0 Signal Name Function
1 -
GND
Signal Ground
2 I
HOME
CR Home Position
A-3