A26 Display Board Removal; Tools Required; Procedure - Agilent Technologies E4991A Service Manual

A26 Display Board Removal

Tools Required

• Torx screwdriver, T15

Procedure

Step 1. Remove the outer cover as described in "Outer Cover Removal"
Step 2. Disconnect the following cables from the A26 Display board.
• A26 to Floppy mylar ribbon cable (item 5 in Figure 6-2 on page 236)
• A26 to A27 Mass Storage Disk Drive flat cable (item 6 in Figure 6-2)
• A26 to A20 Digital Motherboard floppy flat cable (item 2 in Figure 6-2)
• A26 to A20 IDE1 flat cable (item 1 in Figure 6-2)
• A26 to Backlight primary cable (item 7 in Figure 6-2 )
• A26 to LCD mylar ribbon cable (item 4 in Figure 6-2)
Step 3. Remove a torx screw fastening the A26 to the rear panel.
Step 4. Remove the A26.
NOTE Use the following procedure when you handle the mylar ribbon cable. The mylar cable and
their connector are very fragile. To replace to a new mylar cable is recommended when you
are instructed to disconnect and connect the mylar cable frequently.
To disconnect the cable:
Step 1. Pry up the retainer slightly at either end of the connector as shown in Figure 7-9, using a
small flat-blade screwdriver.
Figure 7-9 pry up the retainer
Step 2. Pull the mylar ribbon cable out of the connector.
Chapter 7
Replacement Procedure
A26 Display Board Removal
303