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Maintenance
Removing the Synthesizer
Module
1. Remove the holding screws from the top and bottom of the synthesizer
module rear panel. The synthesizer module is a two circuit board assembly;
do not attempt to dismantle the assembly.
2. Disconnect the following cable connectors between pilot lock module and
the synthesizer module (see Figure 6–5 for the cables to disconnect).
a. Cable connector coupling between J2 of the synthesizer module and
J0460 of the pilot lock module (cable label 6).
b. Cable connector coupling between J1 of the synthesizer module and
J0270 of the pilot lock module (cable label 7).
3. Press the release on the front side of the four conductor data connector (at the
top of the board near the rear) and disconnect it from J7.
4. Carefully pull up on the module to loosen it from the backplane connectors.
5. When the module is loose from the backplane connectors, lift the module up
to gain access to the remaining interconnection cable.
J7 Data
J6
J1
J4
J3
J2 10 MHz Tune to cable connector
coupling between the Synthesizer
module and J0460 of the Pilot Lock
module (cable label 6)
J1 Clock #1 to cable connector coupling
between the Synthesizer module and J0270
of the Pilot Lock module (cable label 7)
Figure 6–5: Synthesizer module Frac-N board cable connections
RFA300 Measurement Set 8VSB Service Manual
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