Remove/Replace Fid Diode Bridge Assembly - HP 5890 SERIES II Service Manual

Remove/Replace FID Diode Bridge Assembly

HAZARDOUS VOLTAGES ARE PRESENT IN THE INSTRUMENT WHEN THE POWER
CORD IS CONNECTED. AVOID A POTENTIALLY DANGEROUS SHOCK HAZARD BY
DISCONNECTING THE POWER CORD BEFORE WORKING ON THE INSTRUMENT.
1. Set the main power line switch to the off position.
2. Disconnect the power cable from its receptacle.
3. Lift the hinged top cover at its front edge,
exposing the detector area.
4. If an autosampler is installed on the instrument,
it will be necessary to remove it and its mount-
ing bracket to allow removal of the left side cov-
er as follows:
a. Remove the autosampler tray from its
mounting bracket by first simultaneous-
ly lifting and turning the two tray locks
which hold it in position, then sliding
the tray away from the instrument.
b. Lift the autosampler tray from its mount-
ing bracket and set it aside.
c. Remove the autosampler bracket by
removing the 6 screws securing it to
the instrument.
5. Remove the two screws securing the left
side panel along its bottom edge.
6. Slide the left side panel towards the rear
of the instrument and lift.
7. Remove the four screws securing the rear
cover to the instrument.
8. Slide the rear cover towards the rear of the
instrument.
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