Service Manual
6-17
Troubleshooting
6
Image processor
Image processor normal indicators
There are three indications that the print engine and its image processor are
powered-up and operating normally: the front panel POWER and READY
indicators are on (steady) and the rear panel STATUS light is blinking.
When the printer is receiving or processing data, the front panel READY light
blinks.
Image processor hard and soft error indicators
Hard errors are image processor self-test failures that would prevent the printer
from printing a page. Hard errors cause the rear panel STATUS light to stop
blinking and remain on or off. Hard errors are also any error that occurs during
service mode.
Soft errors are errors that occur during the normal power-up self-test that, while
limiting the printer, would not stop the printer from printing its startpage. A
message regarding the soft error would then be printed on the startpage (even if
the startpage had been turned off). Soft errors include failures of the expansion
SIMMs, as well as the SCSI, serial, LocalTalk, parallel, and Ethernet ports.
Verifying the image processor's operation
The front panel READY light indicates the activity of the image processor. If the
light is on (steady), then the image processor is idle. If the READY light blinks,
then the image processor is receiving and processing data.
You can verify that the image processor can correctly receive, process and output
a print file by using the Test Pattern Generator (order number 067-1433-99).
Appendix D “Test Pattern Generator” explains how to use the Test Pattern
Generator.