7521Plus / 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.
Board-level
Troubleshooting for
PIO test error.
YES
Test
OK?
NO
Try another known good PIO device. (Such as printer)
YES
OK?
NO
Replace M/B or go
into
Correct
it and end.
Change the faulty device then end.
Check the following parts for cold solder or one of the following parts on the
Parts: | Signals: |
|
J505, C5 | P_STB# | P_D/PE |
U27, L1 | P_D/AFD# | P_D/SLCT |
FA1, FA2 | P_D/ERR# |
|
FA3, FA4 | P_LPD[0:7] |
|
FA5, | P_D/INIT# |
|
CA3~CA6 | P_D/SLIN# |
|
| P_D/ACK# |
|
| P_D/BUSY |
|
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