Digital Equipment DEClaser 320, Руководство по обслуживанию

Страница: 158 / 400

7.4 Blank Prints
3. Remove and inspect the developer cartridge for the following:
• Press down the blue handle of the spring loaded developer
drive gear mechanism. The return spring should offer a firm
resistance and when released, must return to its starting
point.
If you feel sticking, binding, or see any damage, replace the
main motor and gear assembly.
• Turn the gear that rotates the magnetic developer roller. If
you feel or see any binding or damage, replace the developer
unit.
• If the toner is unevenly distributed over the surface of the
magnetic roller, replace the developer unit.
4. Inspect the condition of the following scanner assembly
components:
• Check the 12-pin plug that connects the scanning assembly
to the wire harness to P36 on the DC control board.
• Tighten the screw that connects the two ground wire ring
connectors to the metal shield of the scanning assembly.
• Make sure the scanning assembly is correctly mounted and
screwed down.
• Remove the print cartridge and inspect the window on the
bottom of the scanning assembly. Make sure there are no
obstructions in the path of the laser beam.
5. Inspect the print drum ground clips. When the top door is closed,
this clip connects the metal print drum axle to the frame of the
printer.
Use an ohmmeter to measure the resistance between the metal
part of the print drum and the frame of the printer. If the
resistance is greater then 10
, replace the ground clip.
6. Perform all the steps in Section 7.17, Developer Bias FIP.
7. Perform all the steps in Section 7.15, HVPSA FIP.
7–6 Image Defects FIPs