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Service Maintenance
______________________________________ Replacing PCBs and Assemblies in the Tower
__________________ LCQ Deca XP Plus Hardware Manual _________________
5-53
d. Unpack the new RF Voltage Amplifier PCB (P/N 97144-61015).
Retain the packing materials so that you can pack and ship the
defective PCB to the Thermo Finnigan Repair Center in San Jose. Be
sure to note the apparent problem or symptoms on the enclosed
forms.
e.
Install the new PCB in the place occupied by the old PCB.
f.
With a Phillips screwdriver, reinstall the screws that secure the RF
Voltage Amplifier to the top of the tower.
g. Reinstall the metal cover to the top of the RF Voltage Amplifier PCB.
h. Reconnect all cables to the RF Voltage Amplifier PCB that you
disconnected in step 7a.
Go to step 8.
8. Reinstall the top cover of the MS detector as described in the topic
Reinstalling the Top Cover of the MS Detector on page 5-16.
9. Place the electronics service switch in the Operating Position.
10. Run the Tune Plus diagnostics to verify that the system is operational.
11. If you replaced the Analyzer PCB, Analyzer Auxiliary PCB, or RF
Voltage Amplifier PCB, tune the ring electrode and quadrupole/octapole
RF voltages as described in the topic Tuning the Ring Electrode and
Quadrupole/Octapole RF Voltages on page 5-16.
Replacing the System Control PCB
To replace the System Control PCB, proceed as follows. See Figure 5-12 on
page 5-33 for the location of the System Control PCB.
1. Place the electronics service switch in the Service Position (or shut down
and vent the XP Plus system as described in the topic Shutting Down the
System Completely in the System Shutdown, Startup, and Reset
chapter).
2. Remove the top cover of the MS detector as described in the topic
Removing the Top Cover of the MS Detector on page 5-6.
3. Remove the right side cover of the MS detector, as follows:
CAUTION. Make sure that the XP Plus electronic service switch is in the
Service Position (or shut down or shut down the system and disconnect the
power cord) before you proceed.
Summary of Contents for LCQ Deca XP Plus
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