TM 55-1905-223-24-14
(2)
Remove fuse (3) from fuseholder cap.
(3)
Place replacement fuse (3) in fuseholder cap.
(4)
Insert fuse (3) into appropriate fuseholder (ac or RPTR) on gyro control and power assembly (1), push
in and turn clockwise to secure.
(5)
Start compass (TM 55-1905-223-10).
c.
DC Fuse Replacement.
(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 (MK 27 GYRO PWR XFR UNIT) to OFF. Tag "Out
of Service, Do Not Operate."
(3)
On gyro control and power assembly (1, FIGURE 2-4), push in on DC 8 AMP fuseholder cap and turn
counterclockwise and remove fuse with fuseholder cap.
(4)
Remove fuse (2) from fuseholder cap.
(5)
Place replacement fuse into fuseholder cap (2).
(6)
Insert fuseholder cap on gyro control and power assembly (1), push in and turn clockwise.
(7)
On pilothouse IC/ELEX panel, set circuit breaker No. 1 (MK 27 GYRO PWR CONV UNIT) to ON.
Remove "Out of Service - Do Not Operate" tag.
(8)
On pilothouse dc panel, set circuit breaker No. 1F (MK 27 GYRO PWR XFR UNIT) to ON. Remove
"Out of Service - Do Not Operate" tag.
(9)
Start compass (TM 55-1905-223-10).
d.
Cable (C-LC12) Replacement.
(1)
On pilothouse IC/ELEX panel, set circuit breaker No. 1 (MK 27 GYRO PWR XFR CONV UNIT) to
OFF. Tag "Out of Service, Do Not Operate."
(2)
On pilothouse dc panel, set circuit breaker No. 1F (MK 27 GYRO PWR XFR UNIT) to OFF. Tag "Out
of Service, Do Not Operate."
(3)
Remove gyro compass (para. 2-12).
(4)
Remove four bolts (6, FIGURE 2-5) that mount gyro control and power assembly (13).
(5)
Position gyro control and power assembly (13) for access to rear of assembly.
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