A4, A5, A6 Samplers And A7 Pulse Generator; Emoval; Eplacement - HP 8753D Option 011 Service Manual

A4, A5, A6 Samplers and A7 Pulse Generator

Tools Required
T-10 TO X screwdriver
5/16-inch open-end torque wrench (set to 10 in-lb)
ESD (electrostatic discharge) grounding wrist strap
Removal
1. Disconnect the power cord and remove the top cover (refer to \Covers" in this chapter).
2. To remove the sampler (A4), you must remove the source bracket (item 1).
3. Disconnect all cables from the top of the sampler (A4/A5/A6) or pulse generator (A7).
4. emove the screws from the top of the assembly. Extract the assembly from the slot.
Note
If you are removing the pulse generator (A7), the grounding clip, which rests
on top of the assembly, will become loose once the four screws are removed.
Be sure to replace the grounding clip when reinstalling the pulse generator
assembly.
If you're removing more than one sampler, be careful not to mix them. The
sampler (A4) is di erent from the A and B samplers (A5 and A6).
Replacement
everse the order of the removal procedure.
Note
When reconnecting semi-rigid cables, it is recommended that the
connections be torqued to 10 in-lb.
Be sure to route W8 and W9 as shown. No excess wire should be hanging in
the A11 and A14 board slots. outing the wires in this manner will reduce
noise and crosstalk.
14-26 Assembly Replacement and
Post-Repair Procedures
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3/21/106 15:15