|
Zenith VR8900W (rebadged Sony SL-5000) reel motor supply issue (need a schematic)
I'm working on an early front load Betamax deck.
There's a motor that drives both cassette reels and the threading mechanism. After going over the belts it will rewind and fast forward like a champ and usually thread tape (sometimes it plays dead) but it won't opperate the take up reel in play mode... checking the voltage to the motor I have figured out that the reel motor gets around 10V in all modes where it should run except play mode where it gets 2.5V...To confirm the issue was electrical instead of mechanical I took an external 7V supply and hooked it to the motor as soon as play was pressed and the take up reel worked well for the couple minutes I tested it for.
The board that feeds this motor is hard to get at(the least accessible board in the deck) and I suck at troubleshooting solid state devices without a schematic...does anyone know where I can find or happen to have a copy of the repair manual (Sam's, Zenith, Sony)? I really need a look at the schematic of the control circuit for the reel/threading motor and instructions for accessing the board.
|