loudvette
New Member
Hi all, recently purchased a ca-3000. Running tests, the right meter 4300840 meter dead. Where can I get one?
#riffshifi
#riffshifi
First you need to determine if the meter is bad or not. You can take a multimeter on the lowest ohm's setting and just touch the leads of the meter. It should defect the meter. You may have to reverse the leads to get a positive movement. Just touch the meter, don't hold the leads on the meter for an extended time. You just want to see if it moves with voltage or not. If its good then we can look at way it isn't moving. My initial thought would be a bad transistor, but could also just be dirty switches, old caps, broken wire, bad solder joint, etc.
I haven't tested that particular meter but they're typically 200-300mV and 200-300uA for full scale. Multi-meters push out about a volt and you've got a meter there that could be very hard to replace... I already looked in sansui-parts-shop and he doesn't have any. If your ohm meter flicked when you tested the movement at least it tells you the coil isn't open.
Be careful, those meter suspensions are extremely delicate - and as already hinted - even the voltage from a multimeter could damage the coil unless applied for a very short time. Hidden out of sight in your pictures there is usually a mechanical zero setting adjuster (like the head of a screw) in the front panel of the meter, you could try gently turning that to see if you can move the needle.Ill pull it open tonight and see if it has shit in it
the one on ebay is a 4300841 and mine is a 4300840 is there a difference? i don't want to buy one but rather fix it..As others have said, be very careful but it seems to be jammed and holpfully you can free it. There is one for sale on Ebay but its going for $190, so as we say, BE CAREFUL
it may be different. try to fix what you have
I agree that repairing a meter that is "open" in an ohms test, but free movement is a tricky job typically best done by someone that has done this kind of work before. Its very easy to further damage the hair springs that make them unusable.Hi,
Repairing meters is a specialist job, it is very easy to damage a meter movement if you attempt a repair. I had a BA2000 in for repair a while ago, and one meter wasn't working. See this thread
http://audiokarma.org/forums/index.php?threads/ba-2000-on-the-bench.694143/#post-9279963
It is likely that one of the hair springs has broken away from its connection point.
See post 4 in the above thread re a specialist meter repairer in the US (I sent the meter all the way from Australia to the US for repair).
Cheers
John