Figure 42 Maintaining the Rotary Control Continued

tains a circuit for discharging the high voltage to ground when power is removed. However, to make certain, always discharge the display as follows.

a. Attach one end of a large, well-insulated, 18-gauge jumper wire to ground.

b. Momentarily touch the free end of the grounded jumper to the CRT anode by sliding it under the anode cap.

c. Wait two minutes and repeat part b.

3. Use a vacuum cleaner with a soft long-bristled brush attachment or use a soft-bristled paint brush to remove loose dirt and dust accumulated on the inside of the cabinet. Be sure to clean the electrical components thoroughly (power supplies, PCB assemblies, display, etc.).

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