Honeywell Vibrex 2000 - Page 257

Chapter 6 – Maintenance
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13841 Rev A
241
Possible Cause
Corrective Action
than 130° F) the display may not be able to be
adjusted brightly enough to read. Remove the
unit from heat.
EPROM chip loose
or damaged
Remove the shield (see Section 6.3.7.2
“Disassembly”) and check the EPROM chip
for looseness, position, and/or damage. The
main PCB may have to be removed for
closer inspection.
Keyboard ribbon
cable loose or offset
Check the ribbon cable for looseness, position,
and/or damage.
Internal short circuit
Remove the connector end plate and carefully
inspect internal wires for damage (see
Section 6.3.7.2 “Disassembly”).
Problem: Display Too Light
Contrast incorrectly
adjusted
Adjust the contrast by using the two keys to
the right of the screen.
The -12V power
short-circuited
Remove any damaged cables and try again.
Inspect connectors for visible damage.
Unit too cold
If the unit has been exposed to low
temperatures (less than 0° F), the display may
not be able to be adjusted dark enough to read.
Move the unit to a warmer place.
Problem: Unit Not Responding to Certain Keys
Keyboard connector
loose, offset, or
damaged
Adjust the contrast by using the two keys to
the right of the screen.
Keyboard failure
Return the unit to the factory for repair.
Problem: Unit Repeatedly Turning Off Unexpectedly
Battery end plate
Check the battery end plate for excessive