168
8175 N/B MAINTENANCE
8175 N/B MAINTENANCE
Yes
No
Test
OK?
Replace the
faulty parts.
1. Check if PIO device is installed
properly. (J1)
2. Check CMOS LPT port setting properly.
Try another known good
PIO device.
No
Re - Test
OK?
End
Yes
Correct it
Replace
Motherboard
PIO Test Error
Yes
No
One of the following parts or signals on the motherboard may be
defective, use an oscilloscope to check the signals or replace the parts
one at a time and test after each replacement.
PARTS:
SIGNALS:
U509 RP500
R500 C504
J6 PJ2
RP1 RP2
R1 RP3
RP4 U501
U502 J1
RP[502:504]
CP[503:505]
P_SLCT,
-P_STB
-P_AFD,
-P_ERR
P_LPD [0:7]
-P_INIT,
-P_SLIN
-P_ACK,
P_BUSY
P_PE
AFD#
LPD0
ERR#
LPD1
INIT#
Board-level
Troubleshooting
8.11
PIO Port Test Error
When a print command is issued, printer prints nothing or garbage.
SLIN#
LPD3
LPD2
LPD4
LPD5
LPD6
LPD7
ACK#
BUSY
PE
SLCT