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Get one from Dillen on this forum he has the right ones
Location: Mexico city
Well, not quite there yet with this one, but working on it.
Martin
Please let me know when you have them!!
Well I'm still at it. My deck worked just fine for about 2 months then the problem came back. I have replaced transistors 1TR14, 1TR15 & 1TR16 with no help. Also when I monitor the base of 1TR14 there is no change at all when the problem happens. The base of 1TR15 drops from .5 to .3 mv. so I do not think that is the cause.The base and emitter of 1TR16 goes to 17 volts as does the base of 0TR4 but the tone arm solenoid activates and lifts the arm which I do not understand.
The other weird thing is at the base of 1TR15 I see a 10mgz signal that I do not think should be there although it's there while the deck is working fine and goes away when the problem hits. I am attaching a picture so maybe someone out there that has a 4002 can look at theirs and see if they have it too.
Well it looks like I have found the problem!!! An intermittent open base-emitter junction on 0TR4!. It's only taken 2 years but It's working great now. It finally went out long enough to get the readings I needed and was able to test it out of circuit to prove it
Jim.
Good job!
Martin
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