Remove/Replace Fid Jet - HP 5890 SERIES II Service Manual

Remove/Replace FID Jet

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.
FLAME IONIZATION (FID) DETECTORS USE HYDROGEN GAS AS FUEL. BE
`
SURE ALL HYDROGEN GAS IS TURNED OFF AT ITS SOURCE BEFORE
REPLACING ANY FLOW COMPONENTS.
1. Set the main power line switch to the off position.
2. Disconnect the power cable from its receptacle.
3. Turn off all gas supplies.
4. Lift the hinged top cover at its front edge,
exposing the detector area.
5. Remove the electronics carrier top cover .
6. Remove the right side panel by
removing four screws: two each
along its top and bottom edges.
ELECTRONICS
CARRIER TOP
COVER
7. Disconnect the ignitor wire lead connector at
the mating connection adjacent to the ignitor.
8. Loosen the screws securing the clamps
holding the detector PCB interconnect in place.
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SCREWS
SCREWS
RIGHT SIDE PANEL
SVC 4- 18
RED O VISIBLE
OFF ON
DETECTOR PCB
INTERCONNECT
IGNITOR
CLAMPS