Paper Out Sensor (Ps301) Functional Check; Manual Feed Sensor (Ps302) Functional Check - HP LaserJet II Serie Manual De Instrucciones

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Paper Out Sensor (PS301) Functional Check
To check the functional operation of the Paper Out Sensor (via the Control Panel display), proceed
as
1.
2.
3.
follows:
While the printer is ON and not in Manual Feed mode (i.e., Manual Feed indicator o~, remove
the input tray from the printer.
With one hand, PUSH on the Iefi-most paper tray identifier switch (SW203), being careful not
to push the Sensing Arm flag at this time. (See Figure 7-5.)
If the printer returns to the READY state at this point:
a. Replace the Paper Control PCA (PS301).
b. Replace the DC Controller.
With the other hand, PULL the Paper Sensing Arm flag toward the front of the printer while
obseting the printer's display.
If PS301 is functioning correctiy, the display will alternate from PC/EC LOAD[size] or 11
PAPEROUTto 00 READY as the Sensing Arm is moved.
If the display does not alternate, the fault is either a bad Paper Control PCA (PS 301) or a bad
DC Controller PCA.
Manual Feed Sensor (PS302) Functional Check
To check the operation of PS302 (the Manual Feed sensor) via the Control Panel display, proceed
as follows:
1.
2.
3.
4.
5.
After powering up the printer with 00 READY in the display, change menu item MANUAL F EED=
to ONand PAPER=to LETTER (HP 33449 only). (On the HP 33440, remember to toggle through
the remaining menu items, then hold down the
[CONTINUE\ RESET]
key until 07 RESETappears
in the display in order for the menu change to take effect.) The MANUAL indicator should now
be ON.
Take the printer off line and remove the input tray. Note that the printer should remain in a
READY state at this point.
Press the
(PRINT
FONTS)
key. The FORM FEED indimtor should be ON and the 06 FONT
PRINTOUT message should be foHowed by a PF FEEDLETTER message.
With one hand, PUSH on the left-most tray identifier switch (SW203), being mreful not to push
the Sensing Arm Flag at this time (see Figure 7-5). If the pickup roller begins to move at this
point
a. Replace the Paper Control PCA (PS302).
b. Replace the DC Controller PCA.
With the other hand, PUSH the Paper Sensing Arm flag toward the rear of the printer. If the
Pickup Rollers do not move at this point
a. Replace the Paper Control PCA (PS302).
b. Replace the DC Controller PCA.
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