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3-4. Replacement of Main Parts
3-5. Replacement of Printed Circuit Boards
3-4-3. Backup Battery
To store a part of setup data and a real-time clock, Ni-Cd
batteries are installed on CPU-119 board in BKDM-3010.
To charge the Ni-Cd batteries sufficiently, turn on the
power of DME-3000/7000 about ten hours. The sufficient-
ly charged Ni-Cd batteries enable data to be stored for
about one week.
n
The life of a Ni-Cd battery is about ten years. Replace the
Ni-Cd battery after a lapse of ten years since this unit is
installed or the battery is last replaced. (For the replace-
ment procedure of the battery, refer to the Maintenance
Manual Part 2.)
3-4 (E)
3-5. Replacement of Printed Circuit
Boards
3-5-1. CPU-119 Board
1. Remove the bottom plate.(Refer to the section 3-2.)
2. Remove the hexagonal cap screws securing the three
D-SUB connectors at the rear of the bottom plate.
3. Remove the nine screws on the CPU-119 board, then
remove the board.
X
BVWH3
8
CPU-119 board
BVWH3
X
BVWH3
8
4. Install a new CPU-119 board in the reverse order of
the steps 1 through 3.
X
8
Hexagonal
cap
screws
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