Agilent Technologies 2948, 2712A manual How to Access A3 in Instruments Equipped with Option

Model 8904A Service

Tools:

No. 2 Pozidriv Screwdriver

Needlenose Pliers

PC Board Extractor

(included with Service Manual

or order: HP 08904-00013)

1.Turn instrument off, unplug power cord and remove bottom cover.

2.Disconnect ribbon cable, W17. from\A1OJ1

3.Remove hold-down screw and washer

from center of A10 Ouput Assembly \ using Pozidriv screwdriver.

4.Pull A10 from each of its seven mounting posts. Release each mounting post by compressing the holding tang on mounting post with needlenose pliers while applying gentle upward pressure with the PC board extractor. (Extractor

should exert pressure on metal shield,

not on PC board, except where post\ does not extend through shield.)

5.Lift A10 from instrument and carefully \ lay A10 aside (coax cables will still be connected).

6.Replace hold-down screw (from step 3) with spacer (found under A10) into mounting hole in center of A3. This screw must be in place during adjustment procedure for A3.

I

Figure 8-1 1. How to Access A3 in Instruments Equipped with Option 002

Troubleshooting (Digital/Output Interface) 8-3 1