TM 55-4920-428-13
Naphtha is combustible and toxic. It can irritate skin and cause burns.
Use only with adequate ventilation, away from open flame. In case of
contact, immediately flush skin or eyes with water for at least 15
minutes. Get medical attention for eyes.
e. Remove the DVM. Use naphtha (Item 5, table 4-2) to loosen adhesive if necessary.
f. Clean old adhesive from the panel. Use naphtha (Item 5, table 4-2).
g. Coat the mating surface of the panel with adhesive (Item 6, table 4-2).
h. Remove the cover from the replacement meter.
i. Place retainer on the replacement meter. Secure the retainer to the panel with the hardware.
j. Solder the wires to the meter. Use solder QQ-S-571 (Item 3, table 4-2). (See wiring diagram,
FO-21.)
k. Remove the tags.
l. Install the cover on the rear of the meter,
m. Perform the power supply and DVM tests. (Ref para 4-40.)
n. Install the panel. (Ref para 4-41.)
o. Perform the final test. (Ref para 4-42.)
4-30. Replacement of Power Supply
Circuit Board TB6A. (CRC)
a. (See fig. 6-3.) Remove the panel. (Ref para 4-18.)
b. Remove the hardware attaching circuit board TB6B (19). Move circuit board TB6B as needed for
access to terminals of TB6A (18).
c. Tag and unsolder the wires from the terminals of TB6A.
d. Remove the attaching hardware. Remove circuit board TB6A.
e. Install replacement circuit board TB6A. Secure it with the hardware.
f. Solder the wires to the terminals. Use solder QQ-S-571 (Item 3, table 4-2). (See wiring diagram,
FO-21.)
g. Remove the tags.
h. install circuit board TB6B. Secure it with the hardware.
i. Install the panel. (Ref para 4-41.)
j. Perform the final test. (Ref para 4-42.)
4-8
