TM 55-1905-223-24-14
2-25.
Repair Power Converter. (FIGURE 2-19)
This task covers:
a. Disassembly,
b. Repair,
c.
Assembly.
INITIAL SETUP
Tools
Equipment Condition
Tool kit, general mechanic's,
TM 55-1905-223-10, compass
secured.
Tool kit, electrician's,
Materials/Parts
Glow lamp P/N 632234-6
Cartridge fuse (8 amp) P/N F03A250V8AS
Warning Tags, Item 8, Appendix C
Repair of the power converter consists of lamp replacement and fuse replacement.
DISASSEMBLY
a. Lamp.
(1) On pilothouse IC/ELEX panel, set circuit breaker No. 1 (MK 27 GYRO PWR CONV UNIT) to OFF. Tag
"Out of Service, Do Not Operate."
(2) On pilothouse dc panel, set circuit breaker No. 1F (GYRO PWR TRANSF UNIT) to OFF. Tag "Out of
Service, Do Not Operate."
(3) On power converter (1, FIGURE 2-19) remove lampholder lens (3) by turning counterclockwise.
b. Fuse.
(1) On pilothouse IC/ELEX panel, set circuit breaker No. 1 (MK 27 GYRO PWR CONV UNIT) to OFF. Tag "Out
of Service, Do Not Operate."
(2) On pilothouse dc panel, set circuit breaker No. 1F (GYRO PWR TRANSF UNIT) to OFF. Tag "Out of
Service, Do Not Operate.
(3) On power converter (1, FIGURE 2-19) remove 8A fuse cartridge by pushing in on fuseholder cap (2) and
turning counterclockwise.
2-68
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