HP 250C - Manual (Page 174)

330
350C
8Ć40 Troubleshooting C4699Ć90000
Carriage Test for the DesignJet 330 and 350C
This tests the operation of the carriage sensor and the connection between the carriage flex
circuit and the cartridges.
1 Positionthe sensor over a white surface. (Simply place a piece of
white paper under the sensor.)
2 Inservice mode 1, press
Carriage Test
.
The plottervaries the LED intensity between 255 and 0.
The plotter tests the connection between the carriage flex
circuit and the cartridges by getting the cartridge identification
and checking the electrical continuity for all nozzles.
The plotteralso tests the encodersensor. Because the encodersensoronly detects
motion, it is necessary to manually move the carriage along the encoder strip to
correctly perform the test.
Status. During the test, the
Load Media
,
Error
and
Normal
LEDs turn on (steady) if
the carriage test has not found an error. If the test fails, one, two or all of these LEDs
flash as indicated below:
All OK
Optical Sensor
Failed
Flex-Circuit
Connection Failed
All Failed
Encoder
Sensor Failed
Output to the Serial Port (Viewing Output ' 8-36)
In order to send output to the serial port, it is necessary to set the Verbose mode ON.
This can be done using the iverbose 1;i underware.
Error code: If an error has occurred in the sensor test, this code specifies more
precisely what has gone wrong. Include this information in the
report to your HP Response Center, if the problem cannot be fixed.
Pen 0 = Cyan; Pen 1 = Magenta; Pen 2 = Yellow; Pen 3 = Black.
Sensor sensitivity: The sensitivity measured during the test. The figures should vary
from 255 to 0. Failure occurs when the sensitivity does not vary
(for example, it stays at 255).
Pen ID: If a pen does not fail, the plotter outputs the pen ID.
3 The test continuously repeats itself until you
press the
Shift
key.
Carriage
Test
Shift