Download 8575 N/B Maintenance

8575 N/B Maintenance
8.10 PIO Port Test Error
When a print command is issued, printer prints nothing or garbage.
+5VS
P3
PJ2 P2
P27
Mother Board
J7
25
23
43
P_LPD [0:3]
RP501
0*4
21
DP_LPD [0:3]
P_LPD [4:7]
RP503
0*4
39
17
P_SLCT, -P_STB
DP_SLCT, -DP_STB
-P_AFD, -P_ERR
LPC
Super I/O
-P_INIT, -P_SLIN
37
-PP_STB
11
14
STB#
1
-P_AFD
7
2
-PP_AFD
10
15
AFD#
14
P_LPD0
6
3
P_LPD0
9
16
LPD0
2
-P_ERR
5
4
-PP_ERR
8
17
ERR#
15
8
1
PP_LPD1
7
18
LPD1
3
7
2
-PP_INIT
6
19
INIT#
16
P_LPD2
6
3
PP_LPD2
5
20
LPD2
4
-P_SLIN
5
4
-PP_SLIN
4
21
SLIN#
17
PP_LPD3
3
22
LPD3
5
2
1
23
24
-P_INIT
RP2
0*4
P_LPD3
R1
0
P3
-DP_INIT, -DP_SLIN
-P_ACK, P_BUSY
RP3
R501
0
P_PE
35
DP_PE
33
31
VDD[0:3]
+3VS
CP503
22P*4
C504
22P
29
36
34
CP504
22P*4
CP505
22P*4
CP506
22P*4
32
27
P_LPD4
18-27
U502
PAC128401Q
-DP_ACK, DP_BUSY
0*4
PC87393
J3
1
-DP_AFD, -DP_ERR
RP505
0*4
13
GND_IO2
12
13
11
14
LPD4
6
7
8
1
PP_LPD4
7
2
PP_LPD5
10
15
LPD5
6
3
PP_LPD6
9
16
LPD6
P_LPD7
5
4
PP_LPD7
8
17
LPD7
9
-P_ACK
8
1
-PP_ACK
7
18
ACK#
10
P_BUSY
7
2
PP_BUSY
6
19
BUSY
11
5
20
4
21
3
22
X
23
24
P_LPD5
P_LPD6
8
P_PE
6
3
PP_PE
P_SLCT
5
4
PP_SLCT
RP4
0*4
X
2
1
GND_IO2
PE
SLCT
P3
Parallel Port Connector
U511
RP504
0*4
D501
BAS32L
12
8
P_LPD1
19
DP_LPD [4:7]
RP1
0*4
-P_STB
41
P21
U501
PAC128401Q
12
13
GND_IO2
161