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REMOVE/REPLACE INPUT/OUTPUT BOARD
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TM-11-7025-234-23 Modem Unit MD-1149/MYQ-4A Manual
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REMOVE/REPLACE CIRCUIT BOARDS Al THRU A8

TM 11-7025-234-23
4-17. REMOVE/REPLACE MOTHER BOARD
INITIAL SETUP
Materials/Spare Parts
Common Tools
q Antistatic plastic bags
q Tool kit
Paper
q Pen or pencil
Remove
1. Access modem (para 4-11).
2. Remove circuit boards, Al thru A8
(para 4-18, Remove step 2).
3* Remove power supply assembly (para
4-12, Remove steps 2-7).
4. Remove input/output board (A9) (para
4-16, Remove steps 2-4).
5. Remove rate/mode display board (para
4-15, Remove steps 3-5).
Lift mother board
6. Remove screws.
from chassis.
7. Note jumper settings.
Replace
1. Using your notes, set jumpers.
2. Set mother board in chassis and
replace screws.
3. Replace rate/mode display board
(para 4-15, Replace steps 1-3).
4. Replace input/output board,(para
4-16, Replace steps 1-3).
5. Replace power supply assembly (para
4-12, Replace steps 1-5).
6. Replace circuit boards in their
respective positions (para 4-18).

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