Fluke 732a - Page 41

732A
Table
4-2.
External
Symptom
Troubleshooting
SYMPTOM PROBABLE CAUSE
ACTION
732A
inoperative.
Fuse
blown.
Battery
dead.
Battery opr switch
set
to
OFF,
732A not
plugged
in.
Check
fuse.
Measure battery voltage
at
rear
pane!
jacks.
Recharge battery.
Visual check.
Restore
power.
IN CAL
Indicator
off.
Lost
ac
power,
battery
dead.
Charge
battery,
verify
instrument
calibration.
Repeated fuse
blowing.
AC
line
primary
circuit.
Power transformer.
Bridge
rectifier.
Battery
charger rectifier.
Visual inspection.
(2)
Use
ohmmeter.
Use
ohmmeter.
Will
not run
on
external
ac
or
dc
source.
Ballast lamp
open. Replace
lamp.
Output
voltage
drifts.
Oven
or
reference.
(1)
Temperature sensitive. Oven.
Check
oven controller
circuit.
Output
voltage not correct. Reference.
Perform
calibration
procedure.
Output voltages not adjustable
to
specifications.
Reference.
(1)
Battery
won’t charge.
Defective battery.
Battery
charger
defective.
Replace.
Troubleshoot
and repair.
Battery
won’t charge
from external
source.
Ballast lamp open.
Replace lamp.
(1)
The
Reference
portion
of
the
Oven/Reference
Supply assembly
Is
not
field
repairable.
Refer repair
to
a
Fluke
Technical
Service
Center.
(2)
Return
Instrument to
Fluke
Technical
Service
Center for
service.
4-17