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Service Maintenance
Replacing a Fuse ____________________________________________________________
5-34
___________________ LCQ Deca XP Plus Hardware Manual ________________
d. Reinstall the protective cover over the System Control PCB, as
follows:
i.
Insert the protective cover into the guide slots on the MS detector
chassis and push the cover down until it is seated.
ii. With a Phillips screwdriver, tighten the five screws that hold the
protective cover to the MS detector chassis.
e.
Reinstall the right side cover of the MS detector, as follows:
i.
Place the cover against the right side of the MS detector such that
the studs on the cover insert into the guide slots on the System
Control PCB protective cover.
ii. Slide the side cover forward about 1.25 cm (0.5 in.) until the
studs on the cover lock in the guide slots.
iii. Tighten by hand the fastener that secures the side cover to the
chassis of the MS detector.
f.
Go to step 6.
4. To replace a fuse on the RF Voltage Amplifier PCB, proceed as follows.
See Figure 5-15 on page 5-47 for the location of the RF Voltage Amplifier
PCB.
a.
With a Phillips screwdriver, loosen the eight screws that hold the
metal cover to the RF Voltage Amplifier PCB. Remove the cover.
b. Locate and replace the defective fuse on the RF Voltage Amplifier
PCB with a fuse of the same type, voltage, and current rating. Refer to
Table 5-5.
c.
Place the metal cover over the RF Voltage Amplifier PCB. With a
Phillips screwdriver, tighten the eight screws that secure the cover.
d. Go to step 6.
5. To replace a fuse on the Analyzer Auxiliary PCB, proceed as follows. See
Figure 5-15 on page 5-47 for the location of the Analyzer Auxiliary PCB.
a.
Disconnect the seven cables that connect to the top of the Analyzer
Auxiliary PCB. (Three coaxial cables come from the Analyzer PCB,
one coaxial cable comes from the Waveform DDS PCB in the
embedded computer, one coaxial cable comes from the Waveform
Amplifier PCB, one 7-lead cable comes from the System Control
PCB, and one 4-lead cable comes from the 36 V power supply.)
b. With a Phillips screwdriver, loosen the six screws that hold the metal
cover to the Analyzer Auxiliary PCB. Remove the protective cover
to expose the Analyzer Auxiliary PCB.
c.
Locate and replace the defective fuse on the Analyzer Auxiliary PCB
with a fuse of the same type, voltage, and current rating. Refer to
Table 5-5.
Содержание LCQ Deca XP Plus
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