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CHAPTER 6
Laser malfunction diagnosis flowchart
The laser beam is invisible. When a problem in the laser output occurs, use the laser diagnosis
flowchart to determine whether the malfunction was caused with the laser/scanner unit or the
DC controller PCB.
Notes for the flowchart
1. The following abbreviations are used in the flowchart.
a. Printer driver tester
b. Digital multimeter
2. The printer driver tester switches marked with 'x" can be set to any position.
3. The voltage must be measured three times, and the average taken.
Before usinz the flowchart
Attach the driver tester connector to the envelope feeder connector (51361.
Set the driver tester switches as follows:
TEST PRINT .
VIDEO SELECT .
P A P E R F E E D M E T H O D S E L E C T x
READY
CONTROL
Check by using the flowchart on the next page.
6-12
Download Service Manual and Resetter Printer at http://printer1.blogspot.com
Driver tester
Meter
l
l
Cartridge
.
.
NOT
.
.
.
.
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Troubleshooting
