Citizen iDP3550 Service Manual page 9

4. Removing the Power Board
(1) Remove the chassis assembly and then deta ch the control board.
(2) Remove the strain relief bushing of the power cable from the chassis with a special tool, round nose
pliers, or a similar tool.
(3) Remove the following four screws and detach the power board by lifting it upward while pulling out
the power switch from the chassis.
• Two screws (M4 6) that fasten the transformer
• One screw (M3 8) that fastens the heat sink
• One screw with outer-toothed washer (M4 6) that fastens the earth lug of the power cable
Strain Relief Bushing
Power Switch
5
iDP3550/3551 Service Manual
CITIZEN