Agilent Technologies 2948, 2712A manual Modificationfor Front Panel Assembly

Model 8904A Instrument Changes

7-1 1. MODIFICATIONFOR FRONT PANEL ASSEMBLY

(Serial Prefix 2712A to 2917A)

INTRODUCTION

HP part number 08904-61023contains the parts to replace the front panel in HP 8904A Multifunction Synthesizers with serial prefix 2917A or below. The front-panel keys in these instruments may have a tendency to intermittently stay down when pressed. This problem cannot usually be cured by mechanical adjustment of front-panel parts or by replacement of individual parts.

The kit is easy to install and requires no special tools. The contents of the kit are listed in table 7-3.The A5 LCD Display is not included in the kit and must be transferred from the old front-panel assembly.

	Table 7-3.Parts List for H P 08904-61023 Bont-Panel Kit		1
Qty	Description	HPPartNumber		CD
1	Keycap	0371-3802		3
11	Screw, 3 . 0 ~ 6mm, Panhead, Torx,	0515-1851		4
	with Captive Lockwasher
2	Screw, 25x4 mm, Flathead, Pozidriv	0515-2028		9
3	Flatwasher, 3 mm ID	3050-0891		7
4	Hole Plug, 0.5 inch Diameter	6960-0132		1
1	Display Shield	08904-00021		4
1	Line Switch Bracket	08904-00022		1
1	Keypad	08904-40006		5
1	Keyboard Assembly (Al)	08904-60201		4
1	Front Panel Assembly	08904-61021		8

INSTALLATION PROCEDURE

Removing Covers

Use standard electrostatic discharge (ESD)precautions when working around electrostatic-sensitive components such as on the display and digital assem- blies.

NOTE

Refer to the figures in Section 6 of the H P 89044 Service Manual and figure 7-6in this installation note for part identification and location.

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

2.Remove the top and bottom covers by unscrewing the screw in the middle of the rear edge of the covers. This is a captive screw and will cause the cover to push away from the frame.

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