REAR-TO-FRONT-PANELOUTPUT Conversion, Description

Model 8904A

Instrument Changes

7-5. REAR-TO-FRONT-PANELOUTPUT CONVERSION

Description

This procedure describes how to convert an instrument with rear-panel output connectors (that is, Option 004) to one with front-panel connectors (that is, a standard instrument). The procedure applies to instruments with one pair of outputs or two (that is, Option 002).

The modifications requires partial disassembly bf the instrument (removing covers and routing of cables). No soldering is required. Modification should be done in a static protected environment. After modification, two performance tests must be run.

Parts Required

The following parts are required and may be ordered by contacting the nearest Hewlett-Packard Sales Oflice.

Option	Quantity	Description	HP Part Number
Standard	2	Plastic Hole-Plug	6960-0132
Option 002	4	Plastic Hole-Plug	6960-0132
	3	Cable Tie	1400-0249

Tools Required

The following tools are needed to modify the instrument:

9/16 inch, 6 point Nut Driver No. 2 Pozidriv Screwdriver Diagonal Cutters Needle-nose Pliers

Modification Procedure

Removing Bottom Cover

1.Turn the instrument off and unplug the power cord.

2.Lay the instrument on its top and unscrew the Pozidriv screw in the middle of the rear edge of the bottom cover. This is a captive screw and will cause the bottom cover to push away from the frame. Slide the cover back about 6.5 mm (0.25 inch) and lift it off.

Preparingthe Chassis

1.Remove the nuts from the present rear-panel outputs with the 9/16 inch nut driver. Do not press against the rear panel with the tool or scoring of the panel may occur.

2.Remove the cable ties that secure the coaxial output cables to the sideframe by cutting them with diagonal cutters being careful not to score the soft insulation on the cables.

3.Remove the necessary plastic hole-plugs in the front panel by approaching them from inside the chassis with the needle-nose pliers and squeezing-in the small holding tangs on opposite sides of the plug. Grasp the front of the plug with your fingers to pull it away from the panel. Do not attempt to pry the plug out from the panel or the panel surface may get scarred.

rev.15DEC89