CAUTION!
OBSERVE HIGH VOLTAGES PRESENT WITHIN TRENDSETTER™ CABINET
Main Frame Calibration
Calibration consists of furnishing a +/- 2.500 volt input to the display card, and adjusting the gain
pot. Before attempting, remove all plug-in modules, and observe all high voltage safety precau-
tions.
1. Completely remove all AC power.
2. Facing the instrument, remove the top and left hand side covers.
3. Re-connect AC power.
4. Energize the instrument and allow to warm-up for a period of 5 minutes.
5. Apply + 2.500 volt signal to P25 of output connector, and D.C. common to P11, and
adjust gain pot for full scale.
6. Repeat step 5 with - 2.500 volt, and readjust if necessary.
7. Repeat step 4-6 until +/- full scale and center zero have been set.
Repair
Most integrated circuit components located on the display card are socket mounted for ease of
service. The seven segment digital readouts and bargraph displays are easily replaced should a fail-
ure occur. To replace these components:
1. Completely remove all AC power.
2. Remove top cover plate.
3. Remove 2 screws holding pointer rail assembly.
4. Slide out plastic display bezel.
5. Unplug connectors. Slide display assembly out of case.
6. Remove faulty component and replace with spare.
7. Re-assemble in reverse order.
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