14-44 Chapter 14
Assembly Replacement and Post-Repair Procedures
A23 LED Board (8753ES Only)
A23 LED Board (8753ES Only)
Tools Required
• T-10 TORX screwdriver
• T-15 TORX screwdriver
• small slot screwdriver
• ESD (electrostatic discharge) grounding wrist strap
• 5/16-inch open-end torque wrench (set to 10 in-lb)
Removal
1. Disconnect the power cord and remove the bottom cover (refer to “Covers” on page 14-6).
2. Remove the front panel (refer to “Front Panel Assembly” on page 14-8).
3. Remove the A22 test port coupler (refer to “A21, A22 Test Port Couplers (8753ES Only)”
on page 14-40).
4. Refer to Figure 14-20. Disconnect W33 from the LED board (A23).
5. Remove the screw (item 1) from the front of the test set deck.
6. Remove the LED board (A23).
Replacement
1. Reverse the order of the removal procedure.
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