Xerox 3050 Service Manual page 251

2.1 Control Panel Probable Cause Corrective Action
1. The Message Display is not illuminated, 1A.
no LEDs are lit, no characters are
displayed.
10.
2. The Message Display
i s illuminated, no
2A.
characters or random characters appear.
3. The
Message Display
i s
illuminated, but
3A.
the keys and LEDs do not operate.
(Continued)
There is no 26 VDC. 1A. Go t o the 1.1 AC Power RAP.
Go t o 1.5 DC Power RAP.
There is an open circuit in the wires. 1 B. Go t o FLAG 1 and check for an open circuit
in
the wires between A3P301 and A32P1.
1C. Order the Control Console Assembly and
There is
an internal fault i n the Control Control PWB (A2). Replace the Console
Console circuits or Control PWB (A3). Assembly.
If
the problem persists, replace
the Control PWB (A2).
There is an open circuit i n the Control
2A. Go t o FLAG 2 and check for an open circuit
Console wires.
I
in the wires between A3P301 and A32P1.
There is an internal fault in the Control 2B. Order the Control Console Assembly and
Console circuits or Control PWB (A3). Control PWB (A2). ~eplace the Console
Assembly. If the problem persists, replace
the Control PWB (A2).
There i s an open circuit i n the Control 3A. Go t o
FLAGS 1
and 3 and check for an open
Console wires.
I
circuit
in
the wires between A3P301 and
A32Pl.
There is no 8.4 VDC supplied t o the
Control PWB (A3). 38. Go t o the 1.5 DC Power RAP.
There is an internal fault in the Control
Console circuits or Control PWB (A3). 3C. Order the Control Console Assembly
and
Control PWB (A2). Replace the Console
Assembly. If the problem persists, replace
the Control PWB (A2).
8 1 94
3050 2.1 51
2.1 Control Panel RAP