HP DesignJet 250C Service Manual page 179

Modular Test
This is a combination of the following tests:
D Carriage axis test
D Carriage test
D Media axis test
D Front panel test
D Sensors test
If one part of the test fails, the other parts continue regardless.
Perform the test as follows:
1 Ensure that the carriage is parked in the service station.
The test does not include carriage axis initialization. If the carriage starts somewhere
in the center of the plotter, it will hit the right hand side of the plotter when the test
begins, and the carriage axis part of the test will fail.
2 In service mode 1, hold down the
The plotter performs all the above tests in parallel. See details
of the individual tests to know what happens in each case.
Status. After a few seconds, the appropriate LEDs turn on (steady) as each test
passes. See the following diagram for LED meanings:
Carriage sensor OK
Carriage axis OK
Media axis OK
Media present,
and sensor OK
The front-panel key
that you are
pressing is OK
330
Encoder Sensor
350C
OK
Output to the Serial Port (Viewing Output ' 8-36)
See Individual tests
3 The test continuously repeats itself until you
press the key.
Shift
C4699 90000
key and press
ALT
Flex circuit OK
Carriage axis failed
Cover closed, and
Media axis failed
sensor OK
Media not present,
or sensor failed
330
Pinch-arms
350C
lowered and
Sensor OK
Modular
Test
.
Modular Test
Carriage sensor
failed
connection failed
Cover open. or
The front-panel key
330
that you are
350C
pressing has failed
Sensor failed
330
Encoder Sensor
350C
failed
Troubleshooting
ALT
Flex circuit
sensor failed
Pinch-arms
raised or
Shift
8 45