HP 87114B, Service Manual

Page: 75 / 174

A1 Front P anel Assembly Replacement
Figure 3-1. Removing the Handles and Front P anel Assembly
The A1 assembly comes in two dierent versions: 50 and 75. However , the dierence is
only cosmetic . Both assemblies include all front panel components including frame , keyboard,
keypad, and knob . The assembly does not include the model number nameplate , which must be
ordered separately , nor does it include the type-N connectors which are part of the A5 receiver
assembly .
If the front frame has been damaged, but the keypad and knob are OK, you can save money by
ordering only the following three parts:
Front frame
Nameplate (choose according to model number)
Front dress panel (choose 50 or 75 version)
How to Remove the Front P anel Assembly
1. Disconnect the power cord.
2. Remove the front handles (trim strip rst). See Figure 3-1.
3. Pull the center top of the front panel up slightly and pull the center bottom down slightly to
release the two centered catches .
4. Pull the front panel away from the cabinet several inches .
5. Disconnect the ribbon cable from the circuit board. If you will need to remove the A3, A4,
or A5 assemblies later , remove the handle nut plate on the right side .
If you are planning to remove the A6 or A7 assembly , you should also remove the handle
nut plate on the left side .
6. T o remove the RPG knob , pull it o its splined shaft.
3-2 Assembly Replacement