Epson LQ-570 Service Manual page 45

REV.-A
)
Table A-2 CN2 BOARD ASSY., MAIN (C107 MAINI
Signal Name
+5
+5
2
+ 5
3
4 + 5
+ 5
5
+ 5
6
7
o
8 0
9 I
10 NC
11
12 o
13 I
14
15 I
16
o
17 0
18 0
19
20
21
22
23
24
25 A3
0
A2
26 0
A l
27 0
AO
28 0
D7
29
30 D6
31 D5
D4
32
33 D3
34 D2
35
DO
36
—
Table A-3. CN3 BOARD ASSY~ MAIN I(C107 MAI?
/PAUSE
/READY
2
3 o
4 0
5
0
6 0
7 I
+ 5
8
9
10
SHLD
11 I POWER1
12 POWER2
— —
Function
+5 VDC
+ 5 VDC
+ 5 VDC
+ 5 VDC
+ 5 VDC
+ 5 VDC
Transmit data
Ready to receive data
Receive data
No connection
Reset
Inhibit
Command request
Write ready
Read request
Write
Read
Chip select
Signal ground
Signal ground
Signal ground
Signal ground
Signal ground
Signal ground
Address bus bit 3
Address bus bit 2
Address bus bit 1
Address bus bit O
D a t a b u s b i t 7
Data bus bit 6
Data bus bit 5
Data bus bit 4
Data bus bit 3
Data bus bit 2
Data bus bit 1
Data bus bit O
Function
Pause switch
Fixed GND
Transmit signal (LED)
LED data latch
Shift clock
Load switch data
Receive data (switch)
+5 VDC
Signal ground
Power switch
Fixed
Table A4. CN4 BOARD ASSY. MAIN {C107 MAIN)
No. 1/0 Signal Name
1 0 CRA
2
0 CRB
3 0 CRC
4
0 CRD
5
0
CRCOM
Table A-5. CN5 BOARD ASSY. MAIN (C107 MAIN)
Signal Name
1 0 PFA
2 0 PFB
PFC
3 0
PFD
4 0
5 0 PFCOM
PFCOM
6 0
Table A-6. CN6 BOARD ASSY. MAIN (C107 MAIN)
Signal Name
o HD5
2 HD1
0
HD13
3 0
4 0 HD9
5 HD21
0
6 0 HD17
7 COM
8 COM
9 COM
10
HD24
0
11
HD16
0
12 0 HD12
13 HD8
0
14 HD20
0
15 0 HD4
16 I TEMP2
17
—
A-3
Function
MOTOR, CR phase A
MOTOR, CR phase B
MOTOR, CR phase C
MOTOR, CR phase D
MOTOR, CR common
Function
MOTOR, PF phase A
MOTOR, PF phase B
MOTOR, PF phase C
MOTOR, RF phase D
MOTOR, PF common
MOTOR, PF common
Function
Head data 5
Head data 1
Head data 13
Head data 9
Head data 21
Head data 17
Common
Common
Common
Head data 24
Head data 16
Head data 12
Head data 8
Head data 20
Head data 4
Head temperature
-