HP LaserJet II Serie Manual De Instrucciones página 242

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Erase Lamp Functional Check
The Erase Lamps receive their operating voltage through connectors J333 and J334 on the Exit
Sensor PCA.
1. Remove the Main Body Covers or, at a minimum, the left cover panel.
2.
Remove the EP-S Cartridge and close the Top Cover Assembly.
3. Power on the printer.
4.
Observe the Erase Lamps through the left side opening. H the lamps are functioning, an orange
glow may be observed for about one second fo~owing powerup. If the orange glow is not
observed, veri$ that the Erase Lamp contacts are fully contacting the ~t Sensor PCA. If the
lamps still appear to be malfunctioning, replace the following assemblies in the order listed:
a.
Exit Sensor PCA.
b. Erase Lamp Assembly.
c. DC Controller PCA.
d. Cable assembly between the Exit Sensor PCA and the DC Contro~er PCA.
Image Quality Check
Perform an "Image Qudi~ Check" as follows:
1. Ensure that a properly stored, reliable copier bond paper (e.g., Xerox 4024, Canon NP, etc.) is
instiled in the printir.
2. Run several copies of the Service Mode SeMTest. (See Chapter 3, Section 3-7, for instructions.)
3. Inspect the so~d and shaded gradient areas in the four corners of the Service Mode Self Test
printout. The sotid areas shotid be uniform in density with no fading from one side of the
printout to the other. The four corner gradient patterns should appear uniform. If uniform
density is not being observed, perform the fo~owing
a.
Remove and rock the EP-S Cartridge about its long axis (see Chapter 2, Section 2-3),
b. Clean the Transfer and Primary Corona wires (see Chaptir 4, Section 4-4).
c. Ensure that the Beam-to-Drum Mirror is clean.
If the preceting actions do not correct the densi@ problems, replace the EP-S Cartridge, followed
by the Transfer Corona Assembly, High-Voltage Power Supply Assembly, and Laser/Smnning
Assembly as necessary.
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