7. Remove the twenty connectors on the MS-54 board
(CN1 to CN7, CN9 to CN21).
8. Remove the five screws (PWH3 x 6), then remove the
MS-54 board.
PWH3 x 6
PWH3 x 6
PWH3 x 6
PWH3 x 6
PWH3 x 6
MS-54 board
9. Install a MS-54 board in the main unit in the reverse
order of removal.
GY-2120WD/WS
MS-54 Board
4
3
5
CN5
CN19
CN1
CN9
CN11
CN12
CN10
CN2
CN17
CN16
CN15
CN14
MS-54 BOARD (A SIDE)
1-8. Boards Replacement
2
1
A
CN3
CN4
CN7
B
CN21
C
CN20
D
CN6
E
F
G
H
J
K
CN13
CN18
L
1-27