TM 9-1240-401-34&P
5-6. INITIAL INSPECTION - continued
Item No.
Item To Be Inspected
Procedures
17
VARIABLE RESISTOR
Inspect variable resistor (17) by observing variation in reticle illumina-
tion as variable resistor knob (18) is turned. Variable resistor must
control intensity of reticle illumination from off to bright with 24 volts
DC applied.
18
RETICLE LEDS
Inspect reticle LEDs (19) by observing reticle illumination. illumina-
tion must be adequate in darkened area, with intensity required
for clarity, with 24 volts DC applied.
Section Ill. Troubleshooting
5-7. GENERAL
a.
The symptom index can be used as a quick guide to troubleshooting. Common malfunctions are listed in alpha-
betical order with a page number reference to the troubleshooting table, where a test or inspection and corrective
action are provided.
b.
The direct support troubleshooting table (ref. para 5-9) lists the common malfunctions which maybe found dur-
ing maintenance of the M117/M117A2 panoramic telescope. Perform the tests/inspections and corrective ac-
tions in the order listed.
c.
The general support troubleshooting table (ref. para 5-11) lists the common malfunctions which maybe found
during maintenance of the M117/M117A2 panoramic telescope. Perform the tests/inspections and corrective
actions in the order listed.
d.
This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective action, notify depot maintenance.
