HP 250C - Manual (Page 172)

8Ć38 Troubleshooting C4699Ć90000
Bench Run
The bench run isa routine that each plotter performsbefore it leavesthe manufacturing site.
It attemptsto filter out plottersthat could have an early breakdown due to a fault in
manufacturing. The bench run tests the operation of the electronics, carriageĆaxis system,
mediaĆaxis system, bailĆlift mechanism, and service station.
The bench run is performed at the manufacturing site by sending
special commands to the plotter and then pressing the indicated frontĆ
panel keys. Once the PCĆbased plotter diagnostics are available,
Customer Engineers will be able to run the routine at the customer site
when they replace critical partsof the plotter.
CarriageĆAxis Test
This tests the operation of the carriage motor, belt, tensioner, and encoder strip.
1 Ensure that the carriage is parked in the service station.
The test does not include carriageĆaxis initialization. If the carriage starts somewhere
in the center of the plotter, it will hit the rightĆhand side of the plotter when the test
begins, and the test will fail.
2 In service mode 1, press
Carriage-Axis Test
.
The carriage moves towards the rightĆhand side of the plotter. It
then begins cycles of moving from side to side over an approximate
50Ćcm (20Ćinch) span of the drive roller. The movement alternates
between two speeds: 67.73 cm/sec and 33.87 cm/sec
(26.67 inches/sec and 13.33 inches/sec).
Status. After the first cycle, the
Paper
LED turns on (steady) if the carriageĆaxis test
has not found an error. If the test fails, the
Paper
LED flashes.
OK Failed
Output to the Serial Port (Viewing Output ' 8-36)
Error code: If an error has occurred, this code specifies more precisely what has
gone wrong during the test. Include this information in the report to
your HP Response Center, if the problem cannot be fixed.
Speed: Speed for each carriage cycle.
Maximum PWM: For each carriage cycle, the maximum PWM once the carriage
achieves a constant speed. A typical carriage-axis PWM is 75.
The maximum allowed is 102.
3 The test continuously repeats itself until you press the
Shift
key.
Bench Run
ALT
Carriage-Axis
Test