Indicator Access Cover
1. Remove 16 thumb screws around the outside panel, and remove panel.
2. Remove 2 screws and plug on the back of CRT.
3. Remove Mixer Amplifier circuit board and
4. Clean tube socket for CRT.
5. Remove 5 screws on Power supply and slide out and set aside.
6. Remove 4 screws that hold card cage and pull out.
7. Remove cards and blow and brush clean card cage and boards with brush and compressed air.
8. Brush and blow out compartment with brush and compressed air.
9. Reinstall all components in reverse order and reinstall cover panel.