Thermo Finnigan LCQ Deca XP Plus, Hardware Manual

Page: 138 / 216

Service Maintenance
Replacing a Fuse ____________________________________________________________
5-32
___________________ LCQ Deca XP Plus Hardware Manual ________________
To replace a fuse on the System Control PCB, RF Voltage Amplifier PCB, or
Analyzer Auxiliary PCB, proceed as follows:
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
Resetchapter).
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.
•
To replace a fuse on the System Control PCB, go to step 3.
• To replace a fuse on the RF Voltage Amplifier PCB, go to step 4.
•
To replace a fuse on the Analyzer Auxiliary PCB, go to step 5.
RF Voltage
Amplifier PCB F1 +36 V 1.0 A, quick act, 5 x 20 mm, 250 V 00006-07610
RF Voltage
Amplifier PCB F2 -28 V 0.5 A, quick act, 5 x 20 mm, 250 V 00006-07608
Analyzer
Auxiliary PCB F1 -28 V 1.6 A, quick act, 5 x 20 mm, 250 V 00006-08610
Analyzer
Auxiliary PCB F2 +36 V 1.6 A, quick act, 5 x 20 mm, 250 V 00006-08610
Power Module F1 Voltage select switch 3.5 A, time lag, 5 x 20 mm, 250 V 00006-10510
Table 5-5. MS detector fuses (continued)
Location Fuse Circuit Description P/N
Caution. Use only the fuses specified in Table 5-5. Never replace a fuse
with a fuse of a different type, voltage, or current rating.
Note. To replace the fuse in the Power Module you need to remove the
tower, System Control PCB, and embedded computer. Do not replace the
fuse in the Power Module unless you are qualified to do so.
CAUTION. Make sure that the XP Plus electronic service switch is in the
Service Position (or shut down the system and disconnect the power cord)
before you proceed.