Chapter 13 Routine maintenance and fault-finding

Page 13.3

Has
the fuse
in the 795x
blown
?
Is the
security LED
on the 795x
lit
?
Is the
power to
the 795x
ON
?
YES
YES
795x's Connector/
PowerSupply Board
is probably faulty
NO
NO
NO
Is the
795x's supply
voltage within
spec
?
Turn the power ON
Replace the 795x's
Connector/Power
SupplyBoard
YES
The 795x's Display
Module is probably
faulty
Replace the 795x's
Display Module
The display is blank
Adjustthe voltage so
that it is within spec
NO
PROBLEM:
Replace the fuse by
one of the correct
rating
YES

Figure 12.2: Fault-finding chart 2: The display is blank