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TM 55-1905-223-24-18-2
3-136. Replace/Repair Central Processing Unit. (Figure 3-124)
This task covers:
a. Removal,
b. Disassembly,
c. Repair,
d. Assembly,
e. Replacement
INITIAL SETUP :
Tools
Equipment Condition
Tool kit, electrician's,
Electrical power to engine order
telegraph system secured and
tagged "Out of Service - Do Not
Materials/Parts
Operate." (TM 55-1905-223-10)
Printed circuit board
P/N 05-09601-000
Printed circuit board
P/N 05-09506-000
Printed circuit board
P/N 05-09502-000
Warning Tags, Item 1, Appendix C
REMOVAL
a. Loosen captive screw (1) and open cover (2) on enclosure (3).
b. Tag and disconnect electrical leads.
c. Remove central processing unit (5).
DISASSEMBLY
a. Remove printed circuit boards (6).
b. Tag and remove electrical power cable (4).
REPAIR
Repair at this level of maintenance is by replacement of printed circuit boards (6).
Change 1
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