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Assembly Replacement ESG Family Signal Generators
A2 Display
5-6 Service Guide
A2 Display
Tools Required
• T-10 TORX screwdriver
• 5/16-inch open-end wrench
Removal
1. Remove the front panel assembly. (Refer to the “Front Panel” replacement procedure on
page 5-60.)
2. Remove the small bracket (item 1 in Figure 5-2) that secures W9 (not shown) to the RFI
shield (item 2). Disconnect W9.
3. Remove the RFI shield by removing the seven screws (item 3) that secure it.
4. Remove the display (A2) by removing the four screws (item 4) that secure it.
Replacement
1. Reverse the removal procedure and do the following:
• Torque all T-10 TORX screws to 9 in-lbs.
• Torque W9 to 9 in-lbs.
• If you know the part number of the replacement display, on the CPU/motherboard,
set the jumpers for P104, P105, and P106 to the correct positions for your display.
(See Figure 5-3.)
For part number 2090-0375, set P104, P105, and P106 to the + position.
For part number 1990-1910, set P104, P105, and P106 to the − position.
• If you do not know the part number of the replacement display, do the following:
a. On the CPU/motherboard, set the jumpers for P104, P105, and P106 to the
+ position.
CAUTION Damage can occur to the CPU/motherboard if the signal generator remains
turned on for a prolonged period with the jumpers for P104, P105, and P106
positioned incorrectly.
b. Turn the signal generator on, and observe the display.
c. If the display does not show text or characters within five seconds, turn the signal
generator off and move the jumpers for P104, P105, and P106 to the − position.
Repeat the previous step.