Power Supply Unit; Dc Motor (Hop) / Dc Motor (Id) - Oki B721 Maintenance Manual

Oki Data CONFIDENTIAL

3.2.7 Power supply unit

Warning
There is a risk of electric shock during replacement of the low voltage power
supply.
Use insulating gloves or avoid direct contact with any conducting part of the
power supply, and caution should be exercised during replacement.
The capacitor may take one minute to complete discharge after the AC cable
is unplugged. Also, there is a possibility that the capacitor doesn't discharge
because of a breakage of the PCB, etc., so remember the possibility of
electric shock to avoid electric shock.
(1) Remove the Cover-Rear-Blind. (Refer to 3.2.3)
(2) Remove the Cover-Side-R. (Refer to 3.2.5)
(3) Remove the Plate-Shield. (Refer to 3.2.6)
(4) Disconnect all cables from power supply unit ① .
(5) Remove the three screws (silver) ② and the screw (black) ③ .
(6) Remove the power supply unit ① and the Sheet-Insulation-LV ④ .
(7) Remove the screw (silver) ⑤ , the two screws (silver,8mm) ⑥ and the screw
(silver,M4,8mm) ⑦ , and remove the AC inlet ⑧ .
④
45487001TH Rev.1
Risk of Electric Shock
⑧
⑦
⑥
⑤
③
①
②

3.2.8 DC motor (hop) / DC motor (ID)

(1) Remove the Cover-Rear-Blind. (Refer to 3.2.3)
(2) Remove the Cover-Side-R. (Refer to 3.2.5)
(3) Remove the Plate-Shield. (Refer to 3.2.6)
(4) Disconnect the cable from the DC motor (hop) ① .
(5) Remove the three screws(sliver) ② , remove the DC motor (hop) ① .
(6) Disconnect the cable from the DC motor (ID) ③ .
(7) Remove the three screws(sliver) ④ , remove the DC motor (ID) ③ .
①
3. Component replacement
③
④
②
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