HP laserjet 3390, 3392 all-in-one サービスマニュアル
Engine test
The engine test is used to verify that the print engine is functioning correctly. The formatter is bypassed
during the engine test.
during the engine test.
To perform an engine test
1.
Remove the left cover. See
2.
Use a non-conductive probe to depress the engine-test switch. A single test page prints.
CAUTION
Use a non-conductive probe to depress the engine test switch. Inserting a
conductive probe to depress the switch can damage the all-in-one.
NOTE
The formatter must be connected to the ECU in order to perform an engine test.
Otherwise, the all-in-one does not print.
Figure 6-46
Engine test switch
ENWW
Functional checks
245