Fluke 9640A Series, Instruction Manual

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9640A
Instruction Manual
7-8
Removing Major Assemblies
A2 RF Output PCA
Use the following procedure to remove the A2 RF Output PCA. Three panhead screws
hold the PCA in place. See Figure 7-2.
1.
Remove the top cover from the Instrument.
2. Remove the shield from the Instrument.
3. Slide the front PCA support bracket to the left and lift it out.
4. Disconnect the 60-pin ribbon cable using the ejectors.
5. Disconnect the seven MCX connectors by gently pulling them straight out. Each
signal path is labeled “A-A” etc. on the top screens of the RF Output and Synthesizer
PCAs. Before removing the PCA, note the positions of each cable for re-assembly.
6. Disconnect the two SMA connectors using an 8 mm spanner. Note these connectors
are torque tightened (1 Nm); do not attempt to tighten them before releasing these
connectors.
7. Disconnect the two-pin Molex connector.
8. Disconnect the 20-pin control cable connector. Do not pull it by the leads; pull it by
the body.
9. Remove the three panhead screws securing the PCA to the source.
10. Pull the PCA forward and lift it clear of Instrument.
A2 RF Output PCA
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Figure 7-2. Removing the A2 RF Output PCA