SVC 9-2
Replace Main PCB
` 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.
` NPD AND 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. Allow time for the oven and heated zones to cool.
4. When the heated zones are cool, turn off all gas
supplies.
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.
OFF ON
RED O VISIBLE
ELECTRONICS
CARRIER TOP
COVER
SCREWS
SCREWS
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