1.2 DC Power RAP
The purpose of this RAP is to isolate faults in the DC power and
distribution circuits,
initial Actions - None.
Procedure
Open the Top Cover. Remove the Document Hold-down Guide. Look
down through the aperture in the Platen Glass on the left side of the
Scanner, and examine the 4 green LED status indicators D1, D2, D8 and
D13.
All 4 LEDs are Illuminated.
Y N
Go to Figure 4, Flag 1, and check the voltages from the Power Supply
and the associated fuses on the Power Distribution PWB.
|There is +24 VDC at J1, Pin 5.
Y N
A B
Replace the open fuse.
If the Fuse F2 or F3 opens, replace the Control PWB (REP 4.1.10).
If Fuse F1 opens, go to the 1.2 DC Power Generation BSD
(Section 7) and check for a short circuit in the wires fed by that
fuse.
Platen
Glass
D1
D2
D8
D13
Fuse F1
Figure 1. Voltage Status Indicator LEDs - Top View
Figure 2. Fuses on Power Distribution PWB
7356 Scanner
2/98
2-7
1.2 DC Power RAP
To Next Page
Loading...
Need help?
General
