3-2
CCU-TX7(E)/V1
3-2-2. Replacement of Switching Regulator
[For the Serial No. 10001 through 11000 (UC)]
[For the Serial No. 40001 through 41000 (CE)]
1. Remove the top and bottom covers. (Refer to "3-2-1.
Removal of Cabinet".)
2. Remove four screws (K3
x
6) and disconnect CN1 on the
IO-140 board and CN10, CN19 and CN20 on the MB-
693 board. Remove the rear panel.
3. Remove six screws (B4
x
5) and switching regulator.
4. When installing a new switching regulator, reverse the
above procedures.
Connector (CN1)
Connector (CN10)
MB-693 board
Connector (CN19)
Connector (CN20)
K 3
x
6
K 3
x
6
Rearpanel
IO-140 board
Switching regulator
B 4
x
5
B 4
x
5
B 4
x
5
Top cover
B 3
x
5
B 3
x
5
B 3
x
5
B 3
x
5
Bottom cover
(2) Removal of Cover
