Having a problem with my ST. It keeps blowing Q66 transistor for lamp column 6 after a couple of days. Have checked for blown diodes or shorted lamp sockets on that column, all is good. Is it a board problem or could it be something else?
DE- Blowing lamp driver transistor
- Thread starter John Price
- Start date
sylvain
Active Member
Could be a few things:
- intermittent short in a bulb on that line, or something close to a socket intermittently shorts to something
- ensure your replacement transistor is proper (correct specs/number)
- check resistor R33 for proper value
- check pre-driver transistor Q59.
Good luck!
-Sylvain.
- intermittent short in a bulb on that line, or something close to a socket intermittently shorts to something
- ensure your replacement transistor is proper (correct specs/number)
- check resistor R33 for proper value
- check pre-driver transistor Q59.
Good luck!
-Sylvain.