Hvpsa Circuits; Hvpsa Image Circuits - Digital Equipment DEClaser 1100 Series Service Manual

1.11 HVPSA Density Circuits

1.11.2 HVPSA Circuits

Figure 1–15 gives signal names, connector numbers, and shows the circuitry
that drives and loads the HVPSA.
Figure 1–15 HVPSA Image Circuits
DC Control Board
6
J206
3
7
10
9
8
4
+12 V
VR701 Density
Adjustment
The HVPSA is operated by the DC control board. The primary and
development high-voltage power supplies connect to the EP-L cartridge by
flat spring contacts. The transfer supply connects to the transfer roller in the
front door assembly by a coil spring contact that you can see when the front
door is open. The HV door switch shorts the supply to ground when the front
door is opened.
The flat and coil springs are chrome plated and require no maintenance. Use
a soft brush to clean away dust or paper chips, but avoid using commercially
available liquid or aerosol contact cleaners. Do not attempt to scrape clean,
bend back, or repair damaged contacts.
1–26 Physical and Functional Description
HVPSA
HVDC
J601
VR
Primary
HVAC
+
HVT1
_
HVT3
HVT2
Trans
HVAC
HVD
Develop
VR VR
J602-1
TB601
HV Door
Switch
J602-2
MLO-006187