HP LaserJet II Serie Manual De Instrucciones página 207

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Qerational Check
This will simulate a paper jam:
1. Power off the printer.
2.
Remove the printer's Main Body Covers (left cover only on the HP 33449).
3. Push and hold the bottom of the Etit Sensor Arm counterweight fully foward (toward the
front of the printer) and power ON the printer.
4.
If PS331 is functioning properly, the printer will display a 13 PAPERJAMerror after completing
its warmup cycle. Power the printer OFF and allow the sensor arm to rotate to its normal
position.
The printer should now power up to the 00 READY stite. If the sensor is not functioning in this
manner, perform the electrid check.
Electtid Check
Use the following procedure to perform the electrid check:
1. Remove the Bottom Cover(s).
2.
Using FRAME GND as a reference, measure the voltige at J206-6 (PDP) on the DC Controller
PCA while moving the Etit Sensor Arm counterweight back and forth. The voltage should
toggle from OVdc to +5 Vdc.
3.
If the voltage does not change states when the Etit Sensor Arm is moved, replace the Etit
Sensor PCA. If the voltage changes but the printer continues to report "false" paper jams,
replace the DC Controller PCA.
You may dso measure the voltage on the Paper Etit Sensor PCA as shown in Figure 7-16 while
moving the Etit Sensor Arm. The voltage should toggle from OVdc to +5 Vdc as referenced to
frame ground. If the voltage does not change states while the photointerrupter is moved, replace
the Etit Sensor PCA. If the voltage does change but the problem persists, the cable between the
Fusing Assembly and the DC Controller– or the DC Controller itself– maybe at fault.
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