8648D-02
SERVICE NOTE
SUPERSEDES: NONE
8648D Module/Assembly number: 2090-0362
Module/Assembly Name: Display VFD 2x40
Serial Numbers: See below
Procedure to replace defective 864x display module
Duplicate Service Notes:
8647A-01 Serial Number: 3819U01195 / 3819U01363
8648A-02 Serial Number: 3836U02039 / 3836U02108
8648B-02 Serial Number: 3836U01936 / 3836U01981
8648C-02 Serial Number 3836U02070 / 3836U02127
8648D-01 Serial Number: 3836U00291 / 3836U00295
To Be Performed By: Agilent-Qualified Personnel
Parts Required:
P/N Description Quantity
A1A4 2090-0362 Display VFD 2x40 1
Continued
DATE: September 1999
ADMINISTRATIVE INFORMATION
SERVICE NOTE CLASSIFICATION:
MODIFICATION RECOMMENDED
ACTION
CATEGORY:
LOCATION
CATEGORY:
AVAILABILITY:PRODUCT'S SUPPORT LIFE AGILENT RESPONSIBLE UNTIL: Septmentber 2001
IMMEDIATELY
ON SPECIFIED FAILURE
AGREEABLE TIME
CUSTOMER INSTALLABLE
ON-SITE
SERVICE CENTER
STANDARDS:
LABOR 1.0 Hours
SERVICE RETURN
INVENTORY: SCRAP
SEE TEXT
USED RETURN
PARTS: SCRAP
SEE TEXT
AUTHOR: DX ENTITY: E600 ADDITIONAL INFORMATION:
© 1999 AGILENT TECHNOLOGIES
PRINTED IN U.S.A.
1 of 5
Page 2 Service Note 8648D-02
Situation:
The 864x family changed display type from 2090-0312 to 2090-0362 in May 1998. After
initial investigation it was found that the early releases of the display had a slightly resistive surface mount fuse fitted. Under certain circumstances these fuses can blow causing the
display to become inoperative (dead). This problem has now been rectified. A more robust fuse
type has now been fitted during the manufacturing process. The serial numbers affected are
shown above.
Solution:
It is recommended that any display module with a blown fuse be replaced without having to
remove the front panel.
Action:
The following sections contain a replacement procedure and a list of recommended tools to
replace the defective 864x display module. The procedure outlines the necessary steps to
change a defective display assembly (2090-0362) without braking the RF path. This has the
advantage of reducing cost to the division and down time to the customer. Also the repair can be
carried out at the customers site with very little equipment verification and no re-calibration
required. Finally a list of recommended tools is provided a the end of this document to facilitate
the replacement process.
Note 1: The repair should take approximately 1 hour to carry out, therefore, the average charge
to the division should be one-hour labor cost plus replacement part cost.
Note 2: Display module, P/No 0290-0362 has a 3 year warranty as standard.
Note 3: DO NOT REMOVE FRONT PANEL or BRAKE RF PATH
Replacement Procedure:
Step 1. Remove the 11 outer casing scre ws (M P14 ) from the in st ru me nt co ve r (M P8) wit h a
Proto T15 torx driver.
FIGURE 1
Step 2. Remove the instrument cover (MP8)
Loading...