4-3 Main/VNA PCB Assembly Replacement Assembly Replacement
4-6 PN: 10580-00323 Rev. B S331L MM
4-3 Main/VNA PCB Assembly Replacement
This section describes the removal and replacement of the Main/VNA PCB which is attached to the S331L
Case.
1. Remove the batteries as described in Section 4-1 “Replacing the S331L Batteries” on page 4-1
2. Remove the rear case as described in Section 4-2 “Removing the Rear Case to Gain Access to Internal
Assemblies” on page 4-3.
3. Disconnect the white Keypad and black LCD cable from the Main board..
Note
Procedures in this section are generic, and apply to many similar instruments. Photos and
illustrations used are representative and may not match your instrument.
Figure 4-10. Disconnect White Keypad and Black LCD Cables from Main Board
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