Service manual

Disassembly Procedures

Introduction

The following procedures will make it easier for you to disassemble major components on the Electronic Load mainframes

and Modules. Refer to Figure 5-1 and Table 5-5 for the location of the mainframe mechanical components.

Before proceeding with any disassembly, disconnect the ac power cord and remove the top cover. Then proceed to the

applicable procedure.

Fans

6060A Mainframe

• Remove all modules from the unit.

• Remove the side covers from the unit.

• Remove the six screws securing the fan shroud and remove the shroud.

• The fans are accessible when the shroud is removed.

• Disconnect the fan cable from the applicable fan.

• When reassembling the fans, make sure the fan label faces the back of the unit. When replacing the fan shroud, make

sure ALL the tabs are inserted in the holes in the bottom of the chassis before tightening the screws.

606lA Mainframe

• Remove the front panel (see Front Panel).

• Remove the left side cover from the unit.

• Disconnect the fan cable.

• Remove the two screws securing the fan and remove the fan.

• When reassembling the fan, make sure the fan label faces the back of the unit.

Front Panel

• Remove the left side cover from the unit.

• Remove the trim strip from the top of the front panel frame.

• Disconnect the keypad/display cable from J203/J202 and the power cable from J209 on the GPIB board. (see Chapter

3).

• Remove the two top screws as well as the two outside bottom screws that secure the front panel to the front panel frame

and remove the front panel.