Mike Loewen wrote:
On Wed, 14 Sep 2022, Jonathan Katz via cctalk wrote:
I have a TVI-921C at the museum. I power it on and it beeps
continuously. One long, solid tone that does not stop until I power it
off. How do I start diagnosing this?
Check the power supply voltages.
After checking the voltages, if it has a microprocessor, check if it is being
held reset and if the clock is running.
If it is a big lump of logic, it would probably be a lot easier to deal
with if you can find some sort of service manual / circuit diagram /
circuit description.
Regards,
Peter Coghlan.
