Repair Procedure 11 - NCR PC4i Service Manual

PRINTER (PARALLEL) PORT ERROR TEST
Format of code:
PERIPH:02:ww
EXP DATA: xx,
Where, ww = Detail code
xx = Expected data
yy = Observed data
Detail code:
01 Printer data port error
02 Printer control port error
03 Printer status port error
04 No interrupt on printer port

Repair Procedure 11

To perform the diagnostics test on the printer port
it is necessary to install the Turnaround Test Plug,
Part No. 017-004431.
available it is necessary to construct a wrap plug
according to Figure 5-30. The location of hardware
components used by the printer port is shown in
Figures 5-31 and 5-32.
Figure 5-30
LEVEL 1 DIAGNOSTICS ERROR RETURNS
Date
OBS DATA: yy
If such a wrap plug is not
Connect 1 to 13
2 to 15
14 to 12
16 to 10
17 to 11
Printer Port Loop Back Connector
(Front Side)
Time
5-43