Sl302 Functional Check - HP LaserJet II Serie Manual De Instrucciones

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Table 7-14. Registration/Transfer Area
Checks
Cmcm AC~ON
1. Are there any obstructions in the transfer
Open the Top Cover Assembly of the printer
area paper path? and visually inspect the transfer area.
2.
Are the Registration Roller torsion springs
Visually inspect the springs. Correct if they are
in place? not in position. (See Figure 7-14).
3. Is the Upper Transfer Guide deformed?
4.
Is the Transfer Corona monofilament line
hindering the paper path?
Inspect the guide.
Hint: a quick check would be to lift up on the
registration locking lever and verify if several
sheets of paper (i.e., 2 or 3) can easily be slid
under the Transfer Guide,
Visually inspect the Transfer Corona Assembly
and replace if necessary.
5. Are any of the drive gears excessively worn, Inspect the gears. Replace if necessary.
dirty, or damaged?
6. Is the Main Motor operational? Perform the printer Self Test and visually
observe if the motor is rotiting. See the "Main
Motor (Ml) Functional Check' (Table 7-10).
7. Is anything preventing the energizing of
See "SL302 Functional Check" following this
solenoid SL302 on the Paper Control PCA?
table.
8. Are the Registration Assembly and clutch
See the "Registration Assembly Functional
operational?
ChecR' which follows.
SL302 Functional Check
With the printer ON, open the printer's Top Cover Assembly. Defeat the printer's Top Cover
Assembly and EP-S Cartridge instiled interlock switches (see Figure 7-17). While performing
a TEST PMNT, observe solenoid SL302. If the solenoid is not being energized, perform the
following electrid check.
SL302 Electrical Check
Remove the Botiom Cover(s). Using FRAME GND as a reference, measure J213-03 (REGD) on
the DC Controller PCA while performing a TEST PRINT. The voltage level should switch from O
Vdc (disabled state) to +5 Vdc (enabled). If the voltage does not switch, replace the DC Controller
PCA. If the voltige switches, but the solenoid is not energizing, replace the Paper Control PCA.
=gistration Assembly Wctional Check
If (1) SL302 is operating properly, (2) the Main Motor is fnnctiond, and (3) paper (or other
media) is not moving smoothly through the Registration Assembly, the clutch or rollers may be
excessively worn. If this is suspected, replace the Registration Assembly.
Note
A worn Feed Roller Assembly may ~so "catch" paper as the Registration
Assembly is trying to move the paper through the printer. This normally resulti
d
in an intermittent (i.e., once every 50 to 100 pages) overprint "band" on the page.
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