My G08 chassis started as a learning experience which resulted in me creating a G08 Startup sequence/guide. Since then I have worked on a number of them for friends. My Star Trek G08 was #1… and after working on a number of them.. Why not document them too.

G08 Chassis #2 – In for repair

I received #2 and #3 at the same time. #2 was the better looking of the set so I worked on it first.

On a G08 rebuild, I like to rebed the power transistors and replace the mica insulators with Silpads. Normally Silpads are good enough on their own, only on G08’s do I add thermal paste as an added precaution. These power transistors generate a lot of heat.

Rebuild items:

• Silpads on transistors
• Repin Molex headers to Trifuricon pins on deflection transistors
• Check all transistors, resistors, diodes, etc. in circuit
• Reflow headers as needed
• Clean PCB’s as needed
• Recap
• Deoxit all connections and pots
• Adjust HV Unit power regulator and duty cycle

After all of this – #2 came up clean

Chassis works!

G08 Chassis #3 – In for repair

#3 was an issue 3 deflection board and had more ‘hack looking’ factory mods on it. The best example was a 3rd wire attached from a turned up leg on one of the transistors to the paddle board.

It also had a busted ceramic cap with the rainbow coloring, a couple of disconnected wires, etc..

Went through all of the steps above and ran into one interesting failure.

This one would happen after running for a minute or two.. At first it was the small squiggly of the green arrow only.. it would move to the blue arrow when the green one went away during the attract sequence. After a couple of days of working on both chassis it got much worse with most of the lines being effected. Turned out to be one of the X deflection power transistors as the root cause. Which seems weird.. I guessed Y first..

Chassis works!