Monarch 9820TM, 9835TM Power Transformer Assembly, Transformer Removal, Bridge Rectifier Removal

9820/9830/9835 Service Manual Service Procedures

POWER TRANSFORMER ASSEMBLY

Maintenance of the Power Transformer involves

∙removing/reassembling the power transformer.

∙removing/reassembling the bridge rectifier.

∙removing/reassembling the AC Inlet.

TOOLS REQUIRED:

∙Longnose Pliers

∙Phillips Screwdriver

Transformer Removal

CAUTION

You must remove several wires from the Bridge Rectifier, AC Inlet module, and the Control Board Assembly power connector. It is crucial to reconnect the wires properly when replacing the transformer.

CN6

Connection to AC Inlet

Bridge Rectifier

Transformer

Figure 6-1. Transformer Wiring Diagram

1.Remove four bridge rectifier wires as shown in Figure 6-1.

2.Remove power connector CN6 from the Control Board Assembly. (See Appendix C for location of connectors.)

3.Remove six transformer wires from the AC Inlet module.

4.Remove four transformer base screws.

5.Lay the two grounding wires aside so they do not snag when replacing the transformer.

6.Remove the transformer.

7.Reassemble in reverse order.

Bridge Rectifier Removal

Figure 6-2 Bridge Rectifier (Four Wires)

CAUTION

The bridge rectifier has four wire connections. See Figure 6-2. Reconnect the black and red wires properly when replacing these wires or the printer could be damaged (voltages vary).

1.Remove the four wires and single retainer screw located in the center of the rectifier.

2.Remove the bridge rectifier.

3.Reassemble in reverse order.

AC Inlet Removal

6-3 . Bridge Rectifier (Four Wires)

The AC Inlet has six wires coming from the transformer and one ground wire. Reconnect the wires properly when replacing this part (voltages vary).

28 TC9830SM Rev. B 7/98 Confidential July 1998