Service Manual
6-31
Troubleshooting
6
Image processor self-diagnostics
Image processor rear panel switches for self-testing
The image processor features several self-diagnostic modes. The type of
self-diagnostics run depend upon the position of rear panel DIP Switches 2, 3
and 4. The switch combinations are listed here. The selected self-diagnostics
begin upon power-up or after a hardware reset (DIP Switch 1 is toggled).
Switch
2 3 4
Self-diagnostic mode
↓
↓
↓
Normal power-up self-test
↑
↓
↓
Verification mode
↓
↑
↓
No self-diagnostics
↑
↑
↓
Manufacturing Service test
↓
↓
↑
Configuration page/NVRAM Reset
↑
↓
↑
not used
↓
↑
↑
not used
↑
↑
↑
not used
Normal power-up self-test.
This test requires no paper and no customer
interaction. If a problem is encountered with the image processor's expansion
memory or other options, then the information is printed on the printer's startup
page. Normal power-up tests take between 40 to 80 seconds.
No self-diagnostics.
The printer skips all self-tests and goes directly to
PostScript initialization.
Verification self-test.
This test requires no paper and no customer interaction.
Disconnect all host cables from the printer before starting the test. Verification
tests take between 1 and 2 minutes.
Note
Be sure to disconnect any terminal or host connected to the serial port
if you do not want it to receive the self-test messages.
During the verification self-test the test results are transmitted out the serial port.
Communication parameters for the serial port are 9600 baud, 8 data bits, no
parity, 2 stop bits. The rear panel LED flashes irregularly as the tests are
executed (on for one test, off for the next).