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Dead Ariston TX-510 tuner

D

dweezil

pfm Member
This was working perfectly but following a prolonged brown out it's now dead.
Any inspired ideas?
I've had a quick look and there's continuity in the primaries and nothing looks burnt inside.
Not worth a lot of gold but a quick fix might give it another 15 years.
It actually performed better than i expected with a strong signal and got us Capital on the roof aerial pointed at Crystal Palace, we're well out of range on the Essex coast.
Thx
D
 
could just need a fuse? at the plug end or inside the unit. sometimes the transformers are fused inside, in which case you'd need a replacement.

cheers jim
 
The OP is saying that the primaries are OK, so it's not the transformer UL fuses.
Yes, check the plug fuse and probably a PCB or back panel fuse.
This sort of product has a fairly simple linear power supply, usually 12V for the tuner, maybe 5V for a controller/display and ~36V at low current for the varicaps
 
I think he wrote that there is "continuity" in the primaries, so not necessarily any juice getting through.
 
davidsrsb said:
The OP is saying that the primaries are OK, so it's not the transformer UL fuses.
Yes, check the plug fuse and probably a PCB or back panel fuse.
This sort of product has a fairly simple linear power supply, usually 12V for the tuner, maybe 5V for a controller/display and ~36V at low current for the varicaps
Click to expand...

Pretty much spot on!
I've checked inside for an internal fuse but nothing.
i thought something should work if one of the secondaries had blown but will have another look in case there's a fuse under the pcb.
Being an optimist plug fuse was the first thing i checked.
Once under the pcb i can check the power supply outputs.
Thanks for the replies
 
UL rated transformers have a thermal fuse in a primary. It is this that frequently goes open. For a winding to go open, the transformer will LOOK fried.
This is a quartz PLL model, so there will be 5V as well as 12V. Look for linear voltage regulators and check their outputs.
A photo would help.
 
davidsrsb said:
UL rated transformers have a thermal fuse in a primary. It is this that frequently goes open. For a winding to go open, the transformer will LOOK fried.
This is a quartz PLL model, so there will be 5V as well as 12V. Look for linear voltage regulators and check their outputs.
A photo would help.
Click to expand...

Thanks,
checked all the supply voltages and the switch and all seems ok.
Found a replacement on ebay for £20 so the Ariston's off for recycling, bit of a waste but time is cash and it's tax return time!
ATB
D
 
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