Hi,
I'm trying to get information about a circuit board for a vintage 400 day clock.
I am not sure of the brand name of the clock but the marking on the underside of the circuit board say "Hermle" and there is a number "865".
The jeweler who is repairing the clock says it's an electronic problem and removed the circuit board for analysis.
Can anyone identify the component in the top side photo? It might be a transistor but it has four leads. The only marking is a partial number that might be "780". The case is a reddish color and has a sloped area on the case facing downward to the resistor.
I have never seen a part like this and can't find anything on the internet.
Does anyone have a schematic of the board?
A friend contacted a clock repair company who said they contacted "Hermle" and the circuit board is no longer available. Repairing the board is the only way to fix the clock.
I don't see any bad solder joints and have checked continuity on the red and green coils. Hate to unsolder any parts specifically around the coils as the coil wire is very fine.
Any help would be appreciated.
Thanks,
Mike
I'm trying to get information about a circuit board for a vintage 400 day clock.
I am not sure of the brand name of the clock but the marking on the underside of the circuit board say "Hermle" and there is a number "865".
The jeweler who is repairing the clock says it's an electronic problem and removed the circuit board for analysis.
Can anyone identify the component in the top side photo? It might be a transistor but it has four leads. The only marking is a partial number that might be "780". The case is a reddish color and has a sloped area on the case facing downward to the resistor.
I have never seen a part like this and can't find anything on the internet.
Does anyone have a schematic of the board?
A friend contacted a clock repair company who said they contacted "Hermle" and the circuit board is no longer available. Repairing the board is the only way to fix the clock.
I don't see any bad solder joints and have checked continuity on the red and green coils. Hate to unsolder any parts specifically around the coils as the coil wire is very fine.
Any help would be appreciated.
Thanks,
Mike
Comment