Resetting Nvram - Tektronix Phaser 440 Service Manual

6
Troubleshooting

Resetting NVRAM

6-32 Phaser 440 Color Printer
Manufacturing service test. This test setting is used for servicing and testing
the printer during manufacturing. It is not intended for use in field servicing.
The rear panel LED flashing in a regular one flash-per-second rate means no
errors were detected and that the image processor's CPU is running.
Printing the configuration page
While the printer is idle, if you toggle Switch 4 up until printing starts and then
down, as detailed on the previous page, then the printer prints a configuration
page. The configuration page shows a great deal of information regarding the
data and set-up values stored in NVRAM. Refer to the topic "The configuration
page" on page 2-13 for an explanation of the configuration page.
Resetting NVRAM returns all the Phaser 440 image processor's parameters to
factory defaults except the print count (of images processed through the image
processor) and the Adobe firmware serial number.
To reset the image processor to its factory default values, follow this procedure:
1. Place the rear panel DIP Switch 3 and 9 in the on position (up). Place
the rear panel DIP Switches 2 and 4 in the off position (down).
2.
Flip DIP Switch 1 up and back down to reinitialize the image processor.
3. Observe the rear panel LED; it then quickly flashes four times for
1 second and then is off for 1 second. This pattern repeats for
10 seconds.
During the time the "quick flash" pattern is displayed, move
DIP Switch 9 into the off (down) position. NVRAM will automatically
reset when the health light begins blinking at its steady one
blink/second "heartbeat" rate, indicating normal operation.
If you do not flip DIP Switch 9 down during the "quick flash" pattern
display, then the NVRAM is not reset. If Switch 9 is down during an
ordinary power-up, then the quick flash LED pattern is not displayed
and NVRAM is not reset.
4.
Return Switch 3 to the down position.