298 Chapter7
Replacing Major Assemblies
A1 Front-Frame Assembly
A1 Front-Frame Assembly
This procedure applies to:
8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
CAUTION Use ESD precautions when performing this replacement procedure.
Removal
1. Remove the instrument cover assembly. Refer to the “Instrument
Cover.” removal procedure.
2. Place the analyzer with the bottom side facing up on the work
surface.
3. If the instrument came equipped with the A17 Memory CardReader,
remove it. Refer to the “A17 Memory Card Reader Assembly.”
removal procedure.
4. On 8592L, 8593E, and 8596E spectrum analyzers, remove the cable
tie (2) that secures the A3A11 and A3A12 assemblies to the W10
semi-rigid cable. See Figure 7-1.
5. On 8592L, 8593E, and 8596E spectrum analyzers, disconnect the
W37 semi-rigid cable (3) from the 100 MHz COMB OUT connector
on the front-frame assembly.
6. Remove the two screws (1) that secure the front frame to the main
chassis.
7. If the instrument came equipped with a tracking generator,
disconnect the tracking generator output semi-rigid cable (5) from
the RF OUT connector on the front-frame assembly.
8. Disconnect the W10 semi-rigid cable (4) from the INPUT connector.
9. Disconnect W3 (6) from A1R1, the front-panel INTEN control. It
may be necessary to remove the speaker bracket from LS1 as well as
A22 10 MHz reference in order to get to W3.
10.If the instrument came equipped with an A102 AM/FM Speaker and
TV Synch Trigger (Option 102) or A103 Quasi Peak Detector (Option
103), disconnect W102 from the VOL control wiring connector (8) at
A1R1.
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