HP 250C - Manual (Page 177)

230
250C
8Ć43 Troubleshooting C4699Ć90000
Input/Output Test for the DesignJet 230/250C Only
The input/output test performs the following:
D Parallel input/output test: Reads the data and status registers of the BiĆTronics PAL.
(Tests only a small portion of the BiĆTronics input/output functionality.)
D Serial input/output test: Verifies the ability of the RSĆ232ĆC interface to send and receive
data. This test uses a special loopback connector (part number 07440Ć60302) to connect
the output to the input.
1 Connect the loopback connector to the serial port of the plotter.
If a connector isnot available, you can place a jumper between pins2 and 3 of the
serial port for the test.
2 In service mode 2, hold down the
SHIFT
key and press
Input/Output
test.
Input/Output
Test
Shift
The
Load Media
LED (or the
Ready
LED, if you have
already loaded media) turnsoff while the plotter performsthe
input/output test.
The shift key does not act asa
stop-the-test
key for thistest.
Status. If the test does not find an error, the
Load Media
LED (or the
Ready
LED, if
you have already loaded media) turnson again. Otherwise, an error isreported by an
error code on the front panel.