Chapter 4 189
Assembly Replacement
A15 Daughter Board
A15 Daughter Board
CAUTION Use ESD precautions when performing this replacement procedure.
NOTE The A15 daughter board is attached to part of the frame called the
center-web. The daughter board can be removed from the instrument
without removing the center-web.
Removal
1. Remove the instrument top brace. Refer to the “Top Brace” removal
procedure.
2. Remove the A17, A18, and A19 assemblies. Refer to the “A17 RF,
A18 Reference, and A19 Synthesizer Assemblies” removal
procedure.
3. Refer to Figure 4-15. Unplug the flat flex cable (1) from the rear of
the daughter board. It is necessary to unlock the connector before
removing the cable.
4. Using the T-10 driver, remove the 6 screws (2) that secure the
daughter board to the center-web.
5. Carefully pull up on the daughter board until the connector is
disengaged from the motherboard. Remove the board from the deck.
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