Digital Equipment DEClaser 320, Руководство по обслуживанию

Страница: 171 / 400

7.14 Black Lines or Streaks
Component Millimeters Inches
Registration rollers 44.0 1.73
Fusing pressure roller 79.0 3.11
Fusing heat roller 95.0 3.74
Print drum 125.0 4.92
Developer 56.0 2.2
7.15 HVPSA FIP
Description: Use the following FIP if one or more of the HVPSA voltages
malfunction or if directed here from some other FIP:
1. Inspect or replace the transfer/separation charger for any of the following
reasons:
• If the charge wire is broken, shorted to ground, or otherwise damaged
• If the ground springs are damaged
• If the transfer/separation has any physical damage
2. Inspect the following high-voltage contacts:
• The transfer/separation wires and connector block
• The primary high-voltage connector (see Section 9.17.1) that connects
the print cartridge to the HVPSA.
• The developer bias connector (see Section 9.17.3) that connects the
developer roller to the HVPSA.
3. Swap the following:
• Print cartridge. To see if the primary charger is malfunctioning.
• Transfer/separation charger.
• Developer unit. The developer roller might be shorted.
• HVPSA. (A circuit diagram is provided in Figure 7–5.)
• DC control board
Warning: Use extra caution when working about the low-power, high-
voltage supplies of the HVPSA. Do not attempt to measure the high-voltage
output of the HVPSA.
Image Defects FIPs 7–19