MiTAC 7521 PLUS/N - Manual (Page 132)

131
7521 7521 Plus / N N/B MAINTENANCE Plus / N N/B MAINTENANCE
8.12 PIO PORT TEST ERROR
When a print command is issued, printer prints nothing or garbage.
PIO TEST ERROR
1. Check the PIO device is installed
properly.( J505 )
2. Confirm CMOS LPT port and
extended mode setting properly.
Test
OK?
Re-test
OK?
Replace M/B or go
into board-level
Troubleshooting.
NO
YES
NO
YES
Correct
it and end.
Change the
faulty device
then end.
Board-level
Troubleshooting for
PIO test error.
Check the following parts for cold solder or one of the following parts
on the mother-board may be defective, use an oscilloscope to check
the following signal or replace the parts one at a time and test after
each replacement.
Parts :
J505, C5
U27, L1
FA1, FA2
FA3, FA4
FA5,
CA3~CA6
Signals:
P_STB#
P_D/AFD#
P_D/ERR#
P_LPD[0:7]
P_D/INIT#
P_D/SLIN#
P_D/ACK#
P_D/BUSY P_D/PE
P_D/SLCT
Try another known good PIO device.
(Such as printer)