Ricoh KW5708, Service Training

Page: 31 / 61

Slide 31
Burn-in Test

After repairing each unit, a burn-in test is necessary.

In a burn-in test, the lamp is turned on for a set period of
time (such as 50 minutes), then off for another set period of
time (such as 10 minutes).

This can be accessed in the service mode.

For the procedure, see ‘System Maintenance – Functional
Tests
– Burn-in Test’ in the service manual.

The lamp on and off durations can be set before starting the
test.

This procedure takes a number of hours to complete, so
should not be done at the customer site.

After a normal repair: 2 hours

If the cause of the malfunction cannot be detected: 4 hours

After solving a problem that causes the power to
automatically turn off: 6 hours