Dunlop Uni-Vibe UV1 Debug

[jimifanwing]

Rookie needs a little help!   I am trying to repair a Dunlop Uni-Vibe UV1 that I purchased "non-working".   It passes a signal, but no sweep.    When I uncover the lamp/photocells the lamp is illuminated nicely, but no pulse.  The photocells are very responsive when I manually reflect light at them and the sound is the normal sweep one expects to hear.  I replaced all the ribbon wiring with individual wires and inspected all connections, but still no pulse.  I know I can't expect a "magic answer" but I would appreciate any advice on how to proceed and which areas of the circuit to check out.   I haven't located an accurate schematic specific to this Dunlop version and assume I'm  kinda off the map.   Thanks!

[zombiwoof]

You might want to look for fried protection diodes or other components if the previous owner plugged in a wrong power supply.  Just something to consider.

Al

[jimifanwing]

Thanks for that advice.  I  did have to purchase the correct power source, so perhaps the previous owner did something he shouldn't have.