HP 5890 SERIES II Service Manual page 295

Remove/Replace Power Switch
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. Turn off all gas supplies.
4. Remove the electronics carrier top cover by
grasping it at the rear and lifting upwards until
its catch releases, then pulling it toward the
rear of the instrument.
5. Remove the right side panel by
removing four screws: two each
along its top and bottom edges.
This procedure requires precautions against ESD (Electro- Static Discharge). Use a
grounded wrist strap (part no. 9300- 0969 - large, or 9300- 0970 - small) connected
to a suitable ground. Failure to heed this caution may result in damage to the
instrument.
6. At the right side of the instrument, below the
main PCB, remove the power switch from its
slot by prying the plastic locking tabs on each
side of the switch in toward the switch body.
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
ELECTRONICS
CARRIER TOP
COVER
SVC 11- 9
RED O VISIBLE
SCREWS
SCREWS
RIGHT SIDE PANEL
PULL OUT OF
INSTRUMENT
OFF ON
PRESS HERE