Check, Replace Optimod-Fm Card #5 - Orban 8100A/XT2 Operating Manual

2-8
Installation
3) Install accessory port in PTIM D-FM Only in Model 8100A, S/N below
638000).
Allow about one hour for this step.
a) If a connector is installed in Accessory Port #1, remove the metal plate covering
Accessory Port #2 and discard the plate and its fasteners.
If no connector is installed, remove the metal plate covering both Accessory Ports.
Save the fasteners, and discard the plate. Install the metal plate from the Retrofit Kit
over Accessory Port #1, using the fasteners from the discarded plate.
b) Install the connector in the rear-panel hole marked " ACCESSORY PORT 2 " with the
hardware provided (see Fig. 2-4). Note the orientation of the connector. Dress the
wires as shown, adjusting the cable ties as needed. Connect each wire to the mother,
board as indicated in the table in Fig. 2-4.
With only moderate force, use a #6 (3/16 " ) hex nutdriver (a 5mm nutdriver will also
work) to tighten the small screws.
The wire lengths have been chosen to provide enough slack to enable other service
operations on the rear panel to be performed. It would be unwise to shorten the wires.
The routing shown should be followed to avoid possible crosstalk.
It is safe to tack-solder to the motherboard with the circuit cards in place except in very
high RF fields, in which case all cards should be removed. In any case, we recommend
using a soldering iron with a grounded tip to minimize possibility of circuit damage.
Avoid using excessive amounts of heat or flux at the motherboard, since the connectors
could be damaged by tempering of the contacts through excessive heat or by creeping
flux.
Because some of the motherboard traces are close together, inspect your work very
carefully to be sure that you have not created solder bridges between traces or pads.
c) Re-attach the rear panel by reversing the disassembly procedure.
When replacing the rear panel, make sure that no wires are pinched under the flanges.
4) Check, replace PTIM D-FM Card #5.
Allow about 5 minutes for this step.
In this and the following two steps, you will be instructed to set cards aside rather than
reinstalling them. This is to save you from removing them again to set jumpers as directed
in the INSTALLATION INSTRUCTIONS.
CAUTION
Be sure OPTIMOD-FM ' s internal AC
p wer
switch is set to
OFF before removing or inserting any of the printed circuit
cards.