Oki B721 Maintenance Manual

45487001TH Rev.1
3-9 /
Oki Data CONFIDENTIAL
3. Component replacement
3.2.7 Power supply unit
(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
.
Warning
Risk of Electric Shock
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.
④
①
②
③
⑤
⑥
⑦
⑧
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
.
②
①
④
③

Oki B721 Specifications

General

Print Technology	LED
Resolution	1200 x 1200 dpi
Processor	533 MHz
Memory	256 MB
Connectivity	USB, Ethernet
Duplex Printing	Standard