22
TM 5-6675-330-12&P
11. Trouble Shooting.
If the operating instructions are carefully followed,
instrument, If a problem is encountered, check
no problems should be encountered in ranging
the following table before attributing the cause of
operation using the Auto-Ranger @ IIx EDM
the problem to the instrument,
Malfunction
Probable Cause
Corrective Action
Instrument inoperative
Power fuse blown
Replace fuse
Fuse blows repeatedly
Return to Depot
Instrument operates but BATT light
Power unit battery voltage is low
Recharge power unit battery
flashes
During target acquisition, panel meter
Not enough prisms for range being
Increase number of prisms
pointer does not reach center scale,
measured.
READY light does not come on, and
target screw adjustment will not raise
pointer.
Instrument lens may be dirty.
Clean lens
Internal Electronic failure
Return to depot
Instrument operates, but total operating
Battery pack may have bad cell
Replace Battery pack
hours shorter than normal
Range reading incorrect by constant
Offset switch setting may have
Make certain that offset switches are
amount
been disturbed
set to offset correction value
Instrument appears to operate but will
Target Path blocked after range cycle
Clear target path
not complete range cycle. Signal
started
Meter drops to zero and READY lamp
Internal electronic failure
Return to depot
goes out.
