What is (are) the most universally accepted problems with a Tempest....board issues, power supply issues or x-y vector monitor issues?
1. Replace the big blue capacitor and clean the fuse holders in the power brick.
2. Recap the ARII and replace the voltage adjustment pot if it is not the sealed type. Check R29 and R30 to be in spec. Maybe replace the LM305 regulator and TIP32 and 2N3055 transistors.
3. Inspect contacts within edge connector and repin if they are tarnished or no longer springy.
4. Clean / repair and polish edge connector on main and Aux PCBs.
5. Reflow solder or replace the inter-board headers on both main and Aux PCBs. Polish pins and install new cable.
6. Replace ROM and CPU sockets on main PCB.
7. Replace sockets for PROMs and mathbox chips pin Aux PCB.
8. Add heat sinks to 2901 bit slice chips on Aux board.
9. Replace adjustment pots in analog section of main PCB.
10. Repair main and Aux PCBs as required.
11. Upgrade to rev 3 of the Tempest code.
A. Install LV2000 on deflection board of 6100.
B. Recap deflection, HV, and neck board.
C. Rebuild remainder of HV and deflection boards.
D. Install input protection board if deflection board is P314.
E. Set HV level to 19.5Kv.