E8257D/67D, E8663D PSG Signal Generators Service Guide 269
Assembly Replacement
A2 Display
A2 Display
Tools Required
— T–10 driver
Removal Procedure
Refer to Figure 3-7 for instruments with serial number prefix
< US/MY5XXX3XXX for this procedure.
Refer to Figure 3-8 for instruments with serial number prefix
≥ US/MY5XXX3XXX for this procedure.
1. Disconnect the power cord.
2. Remove the front panel. Refer to “Front Panel” on page 262.
3. For serial number prefix < US/MY5XXX3XXX, disconnect the A2DS1W1
cable from the A4 Inverter and discard/recycle the A4 Inverter (i.e., The
replacement A2 Display does not need the old A4 Inverter).
For serial number prefix ≥ US/MY5XXX3XXX, disconnect the A2W1 cable
from the A2 Display.
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.
Replacement Procedure
1. For instruments with serial number prefix < US/MY5XXX3XXX, reverse the
order of the removal procedure, except now the A2W1 cable is connected
straight to the A31 Motherboard P12 since the A4 is now integrated into
the A2 Display.
For instruments with serial number prefix ≥ US/MY5XXX3XXX, reverse the
order of the removal procedure.
2. Torque all T–10 screws to 9 in–lbs.
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