HP LaserJet II Serie Manual De Instrucciones página 213

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Table 7-19. "50 SERVICE" Fuser Malfunction Checks
1. Is the Fusing Assembly correctly seated into
its connectors on the AC Power Module and
base plate (right and left ends)?
2.
Is the +
24A voltage
present?
3. Is
the circuit breaker on the AC Power
Module tripped?
4.
Is the Thermistor defective?
5. Is the Fuser Bulb open?
6.
Is the Thermoprotector open?
7.
Are the cable assemblies defective?
8.
Is the AC Power Module defective?
9. Is the DC Controller PCA defective?
Vlsudly inspect. Ensure the connectors are
properly seated (no bent pins or pins outside
their receptacles).
Verify per Figure 7-2.
I
Reset breaker.* (See FiWre 7-20.) If the
breaker trips again, replace the Fusing
Assembly or the AC Power Module.
Perform the Thermistor Functional Check
which follows.
Perform the Thermoprotector/Fuser Bulb
Functional Check which follows.
Perform the Thermoprotector/Fuser Bulb
Functional Check which follows.
If the fault is intermittent, replace the Fusing
Assembly Cable to the DC Controller.* If the
fault persists, replace the AC Power Module
cable to the DC Controller.
Replace the AC Power Module.*
Replace the DC Controller PCA.*
Press
Here
Figure 7-20. Fuser Circuit Breaker Reset
7-49