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6-1-3. Plug-in Board Pulling out/Insertion
n
Turn off the power of DNW and then wait 30 seconds before starting the service operation.
Pulling out
(1) Remove the upper lid. (Refer to Section 2-3-1. )
(2) To remove the board retainer (L) or (S), fully loosen a
screw.
Screw
(with stopper)
Protrusion
Board retainer (L)
Square hole
(3) When pulling out the TBC-23 or TBC-24 board,
disconnect the connected harness from its board.
TBC-23 board: CN1 (E-1) ........................ 14P White
TBC-24 board: CN1 (E-1) ........................ 14P White
Insertion
Install in the reverse order of pulling out.
m
. After inserting the board, press in the two folded eject levers simultaneously to firmly connect the plug-
in board to the connector on the motherboard (MB-648 board).
. To reattach the board retainer, tighten the screw after inserting the protrusion of the board retainer into
the square hole of chassis.
DNW-A22/A22P
Board retainer (S)
Protrusion
Screw
(with stopper)
Square hole
6-1. Service Overview for Plug-in Board Replacement
(4) Open the eject levers on both end of the board in the
direction of the arrows.
(5) Hold the eject levers and pull out slowly the board.
2
1
1
Pulling out
(6) When removing the APR-12 or EQ-56 board, discon-
nect the connected harnesses from its board.
APR-12 board: CN500 (A-1) .................... 3P Red
CN600 (G-1) .................... 3P Yellow
EQ-56 board:
CN100 (B-7) .................... 6P White
CN500 (A-4) .................... 4P White
CN1500 (A-5) .................. 4P Black
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1
3
3
2
Insertion
6-3
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