Replacement Of Plug-In Boards - Sony DME-7000 Maintenance Manual

2-7. Replacement of Plug-in Boards

2-7. Replacement of Plug-in Boards
This section explains the replacement procedure of the
plug-in board.
For the board except the plug-in board, refer to the Mainte-
nance Manual Part 2.
m
When removing or installing boards, observe the following
precautions.
Failure to observe these precautions may result in damage
to the internal circuits.
• Before removing or inserting a board, always turn the
power off.
• After inserting a board, and before turning on the power,
make sure that the number on the board matches the
number on the slot.
<Removing procedure>
1. Turn the power off.
2. Open the front panel.
(Refer to steps 1 and 2 in section 2-2.)
3. Remove the five screws, then remove the board retainer.
4. Open the board levers in the direction of the arrow A.
5. Pull out the board levers and remove the board.
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Pull out the board with equal force for both board levers.
<Installing procedure>
6. Insert the board into specified position of the unit
along the board guide rail.
7. Close the board levers in the direction of the arrow B
while pushing in the board.
Board levers
Board retainer
Board
BVTT3 x 5
BVTT3 x 5
Board guide rail
2-10 (E)
To insert the board
B
To remove
A the board
8. Confirm that the number on the board matches the
number on the slot.
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If the board is installed in an incorrect slot, a system
error occurs. Then the system is not activated properly.
Example
(A side)
Can be inserted into only slot No.1.
1
Board lever
Slot No.
9. Confirm that the connectors on board is securely
connected to the MB-438 board (DME-3000)/MB-660
board (DME-7000).
10. Install the board retainer with the five screws.
11. Confirm the secondary power supply voltage.
(Refer to section 1-11.)
CPU-114
Board name