HP LaserJet II Serie Manual De Instrucciones página 191

3.
4.
5.
6.
HP 33440/HP 33449 COMBINED SERVICE MANUAL
With the other hand, PUSH switch SW203 (the left-most microswitch) while obseting the
Control Panel display. (See Figure 7-5).
When the switch is functioning properly, the display will change to 00 READY.
Repeat above procedure, but push switch SW201 (the right-most microswitch). The display
should change to 00 READY.
Repeat above procedure, but push switches SW202 and SW201 (the right two switches)
simultaneously. The display should change to ENVELOPE= [s ize] (HP 33440) or PE
TRAY= [size] (HP 33449).
If the display does not change as specified, replace the DC Controller PCA or the switch lever arms
as appropriate.
Electri~l Check
A continui~ check can be performed on these switches on the DC Controller PCA.
"12 PRINTER OPEN" Message
The 12 PRINTEROPEN error indication tells the operator to close the printer's Top Cover
Assembly. The DC Controller PCA detects this condition due to the absence of the +24B Vdc
supply. When the printer's Top Cover Assembly is closed, a protrusion on the cover eztends into
the DC Power Supply Assembly and closes the switch within this module. The closing of this
switch provides + 24B Vdc to the DC Controller PCA. On the DC Controller PCA, the + 24B Vdc
power is distributed to the High-Voltage Power Supply Assembly and to a +3.2 Vdc regulator
on the PCA. The output from the +3.2 Vdc regulator is the power source for digiti-to-andog
circuit~ on the DC Controller PCA.
Table 7-7. "12 PRINTER OPEN" Checks
2.
Is the protrusion on the Top Cover Assembly
which activates the DC Power Supply
microswitch missing or broken?
3.
Is the printer plugged into the correct power
source?
4.
Is the DC Power Supply Assembly correctly
seated into its connectors on the DC Controller
PCA?
5.
Is the DC Power Supply Assembly defective?
6.
Is the DC Controller PCA defective?
Vlsudly inspect. Correct if missing or broken.
Verify printer power rating. Refer to Chapter 1,
Section 1-2, of this manual.
Note: Plugging a 220 V model printer into a
120 V Voltige source will result in a
12
PRINTER
OPEN error.
Visually inspect. Reseat module if necessary.
See the "+ 24B Vdc Electrid Check" following.
See the "+ 24B Vdc Electrid Check)) following.
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