Westminster record player repair

[deepspacedaz]

Here are the wires

[Techman]

We've already seen that picture, Daz.

Why not answer some of the specific questions that have been asked and where's the picture of that cartridge I asked about?

I can see this thread is going to be hard work!

[Station X]

The rectifier will be something like a UY85. The pins number clockwise from the gap when looking from under the chassis.

Where is pin 9 connected to? It should go to the motor and mains switch, either directly or via a surge resistor.

EDIT. Circuit added. Connection without surge resistor shown in red.

[deepspacedaz]

Pin 9 is a white lead that leads to the motor.

[Station X]

That's good.

Test the resistors then. 22k and 220R I think.

[deepspacedaz]

left resistor reading 228. 229. Reads fine. no reading from the right one

[ms660]

Originally Posted by deepspacedaz

Pin 9 is a white lead that leads to the motor.

In which photo?

Lawrence.

[deepspacedaz]

Photo 3 post 6

[toshiba tony]

When power supplies were so simple, oh for those days again. I'd like to see a SMPS live for so long. And who needs mains isolation anyway!

[Station X]

Originally Posted by deepspacedaz

left resistor reading 228. 229. Reads fine. no reading from the right one

The smoke's escaped from the 22k resistor then. It'll need replacing. It smoked for a reason though. Most likely the smoothing capacitor is short circuit or needs reforming. What resistance do you measure from the ends of the resistor to chassis? You should see the resistance start low and increase to infinity as the smoothers charge from your meter.

[ms660]

Originally Posted by ms660

In which photo?

Lawrence.

Originally Posted by deepspacedaz

Photo 3 post 6

Unless I'm off beam that looks like the white lead is connected to pin 4 (heater) of the rectifier which is what I would expect from a white lead from the motor, the question is where does the anode (pin 9) get it's voltage from?

Lawrence.

[Station X]

Past my bed time!

[deepspacedaz]

Those days are everyday for me

[Techman]

I can't see anything connected to pin 9 anode.

An observation is that there's a sooty mark and a chunk blown out of the chassis where that bare section of the black cathode wire has shorted to it....so that's the answer to at least some of the smoke!

[deepspacedaz]

Ill send the picture of the cartridge over

[Techman]

Originally Posted by deepspacedaz

Ill send the picture of the cartridge over

Cheers for that, Daz.

The point about seeing the cartridge is that if it's an old original type, not only will it likely to have gone low or no output, but it may also be of a type that could spoil later stereo records - if you're bothered about that. The other problem with these cartridges is that they're what's known as a "high output" type to feed the single stage amplifier in this type of player, and unfortunately stereo compatible types are no longer available to buy from anywhere.

[deepspacedaz]

Here is the cartridge

[Techman]

That's an old non-stereo compatible high output BSR TC8H crystal cartridge - that's bad luck!

These can still be bought, but they cost £35 plus postage and no guarantees on how long they'll last, it's also a type that will spoil stereo records - and you've bent the stylus on that one!

[Techman]

Daz, can you confirm that there's no wire connected to pin 9 of the valve next to the round silver can capacitor and that the valve really is a UY85 type?

[deepspacedaz]

Yes the valve is definitely a UY85 type a white wire is connected that leads to the motor