iDP3550/3551 Service Manual
5 CITIZEN
4. Removing the Power Board
(1) Remove the chassis assembly and then detach 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
•Onescrew(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
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