HP 250C - Manual (Page 173)

230
250C
8Ć39 Troubleshooting C4699Ć90000
Carriage Test for the DesignJet 230 and 250C
This tests the operation of the carriage sensor and the connection between the carriage flex
circuit and the cartridges.
1 Position the sensorovera white surface. (Simply place a piece of
white paperunderthe sensor.)
2 In service mode 1, press
Carriage Test
.
The plotter varies 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.
Status. During the test, the
Cartridges
and
Error
LEDs turn on (steady) if the
carriage test has not found an error. If the test fails, one or both of these LEDs flash as
indicated below:
Both OK Sensor Failed
Flex-Circuit
Connection Failed
Both Failed
Output to the Serial Port (Viewing Output ' 8-36)
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