TM 5-6630-215-12
Table 4-1.
Troubleshooting, Orgainizational
MALFUNCTION
TEST/INSPECTION
CORRECTIVE ACTION
SPECTROPHOTOMETER
1.
METER NOT OPERATING AFTER BASIC CHECKS
Step 1.
Test photocell assembly.
Lay the spectrophotometer on
its left side and disconnect the photocell assembly
cable (1) from amplifier circuit board (2) connection
BC2.
Set a VOM to the 50 microampere range and connect
the positive lead to the photocell cable shield and the
negative lead to the center conductor.
Set the spectro-
photometer wavelength dial to 700 nm and turn the
instrument ON.
Rotate the light control fully clockwise.
The VOM should indicate from 5 to 15 microamperes. If
not replace photocell.
a.
Place instrument in operation.
Zero adjust control
should cause movement of needle.
If not and assuming
previous correction actions have been completed, proceed
as below.
4-3
