Xerox 7142 Service Manual - page 68

4 Parts Replacement

RJ-901C/RJ-900C 　 Maintenance Manual

4-22

4.3.4

Replacing Power Board Assembly

CAUTION

• When removing the power board assembly, remove the power cable and wait for at least 

5 minutes before taking it out; this will discharge the residual electrical charge of the 

electrolytic capacitor.

If you handle these boards before the capacitor charge is fully discharged, you may suffer 

electric shock.

• To avoid electric shock, never touch the back of the power board.When handling the 

power board, take the side of the board.

• To avoid a short circuit, do not place the power board assembly directly on conductive 

objects. 

NOTE

Before replacing the power board assembly, remove the following parts.

• Rear cover: 

"4.2.7 Removing Media Guide R2" p.4-14

• Connector panel: 

"4.3.1 Replacing Connector Panel, Network Interface Card (NIC), 

Cooling Fan" p.4-16

• Board bracket: 

"4.3.2 Removing Board Bracket" p.4-18

1. Remove the following connectors from the power board assembly.

2. Remove the power board assembly-retaining screw (cup screw M3

 × 

6 white: 9pcs).

Table 4-3  Connectors to Power Board Assembly

No. Connector No. # of pins Color

Connect to

Remarks

1

CN301

14

White Main board assembly