Chapter 7 — Assembly Replacement 7-8 Main/VNA PCB Assembly Replacement
S412E MM PN: 10580-00324 Rev. N 7-11
7-8 Main/VNA PCB Assembly Replacement
This procedure provides instructions for removing and replacing the Main/VNA PCB Assembly.
1. Open the case as described in Section 7-2 “Opening the S412E Case”.
2. Remove the PCB Assembly from the front panel as described in Section 7-3 “PCB Assembly
Replacement”.
3. Remove the SPA board as described in Section 7-4 “SPA Assembly Replacement”.
4. Remove the GPS board as described in Section 7-5 “SPA and MB/VNA N Connector Replacement”.
5. Remove the Signal Generator board as described in Section 7-7 “Signal Generator Replacement”
on page 7-8
6. Installation is the reverse of removal.
7-9 Fan Assembly Replacement
This procedure provides instructions for removing and replacing the Fan Assembly.
1. Open the case as described in Section 7-2 “Opening the S412E Case”.
2. Remove the Main/VNA PCB assembly from the front panel as described in Section 7-3 “PCB Assembly
Replacement”.
3. Remove the 3 screws and nuts holding the Fan Assembly to the LCD Assembly housing. Refer to
(Figure 7-12).
4. Reverse the above steps to install the replacement Fan Assembly.
Note
When ordering the Main/VNA PCB Assembly all options that are installed on the instrument must be
stated on the order.
Note The fan connector cable is routed through the LCD Assembly housing
Figure 7-12. Front Panel Keypad Bezel
Fan Assembly
Fan Connector cables
go though the LCD
Assembly housing
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