272 E8257D/67D, E8663D PSG Signal Generators Service Guide
Assembly Replacement
A2DS1 Display Backlight (serial number prefix < US/MY5XXX3XXX only)
A2DS1 Display Backlight
(serial number prefix < US/MY5XXX3XXX only)
Tools Required
— T–10 driver
— small phillips screw driver
Removal Procedure
Refer to Figure 3-9.
1. Disconnect the power cord.
2. Remove the front panel. Refer to “Front Panel” on page 262.
3. Disconnect the A2DS1W1 cable from the A4 Inverter.
4. Disconnect the W8 ribbon cable from the A3 Power Switch by lifting the
white tabs on the connector.
5. Using the T–10 driver, remove the four screws (12) from the A3 Power
Switch.
6. Remove the A3 Power Switch.
7. Using the T–10 driver, remove the ten screws (11) that secure the RFI
shielding (10) to the front panel.
8. Remove the metal shielding.
9. Using the T–10 driver, remove the four screws (9) that secure the A2
Display to the front panel.
10.Remove the A2 Display.
11.Using a small phillips screw driver, remove the screw (1) that secures the
cover (2) over the A2DS1 Display Backlight.
12.Remove the A2DS1 Display Backlight.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Torque all T–10 screws to 9 in–lbs.
3. Perform the post–repair adjustments and performance tests that pertain
to this removal procedure.
When replacing the A2DS1 Display Backlight make sure the reflective paper is
behind the light.
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