- Joined
- Apr 15, 2024
- Messages
- 9
- Reaction score
- 1
Hey all. So my experience with CRT repair is not extensive but I HAVE enjoyed some successes. Picked up this asteroids last year. Good board, I recapped, and was serviced by Eugene Marsh. I also recapped the deflector board and installed the jumpers in place of the 2 wirewound resistors. All good there, so it seems.
In the HV cage I have replaced cleaned/reflowed the connector pins and the 2 transistor sockets. Replaced the caps, zeners and HV diode and the tropical fish capacitor.
Upon power up, I start out with +90v at pin 1 of P500... but after about 12 minutes it has risen to 91.8 volts, and this is when the spider webs begin intermittently appearing. Fiddling with the brightness pot makes this stop to a degree, however I had previously removed and cleaned both brightness and contrast pots. Seems to electrically function properly when connected to ohmmeter and turned.
I have to have brightness set lower than normal to eventually get ideal level after about 15 minutes. I KNOW this isn't right. And even after that I get occasional spider web flareups. I hesitate to let my friend have the game.
With all these associated parts I have replaced... what could be wrong?? Wayne Hamilton in Oz has made great efforts to help me during this.
In the HV cage I have replaced cleaned/reflowed the connector pins and the 2 transistor sockets. Replaced the caps, zeners and HV diode and the tropical fish capacitor.
Upon power up, I start out with +90v at pin 1 of P500... but after about 12 minutes it has risen to 91.8 volts, and this is when the spider webs begin intermittently appearing. Fiddling with the brightness pot makes this stop to a degree, however I had previously removed and cleaned both brightness and contrast pots. Seems to electrically function properly when connected to ohmmeter and turned.
I have to have brightness set lower than normal to eventually get ideal level after about 15 minutes. I KNOW this isn't right. And even after that I get occasional spider web flareups. I hesitate to let my friend have the game.
With all these associated parts I have replaced... what could be wrong?? Wayne Hamilton in Oz has made great efforts to help me during this.
