Digihome PVR problem

[PaulR]

I came back from five weeks holiday to find that the Digihome PVR (one of many different badges applied to the Vestel PVR) had siezed up sometime during that time.

When this happens while I'm watching something I simply disconnect the mains plug and let it boot up again. This time it didn't restart! Goodness knows how long it been in that condition as it was quite hot to hold.

I checked the mains fuse (OK) and then looked for an internal fuse. There wasn't one and I couldn't see anything that looked like a fusible link either so I lloked around the rest of the board.

There were signs of heat around a semiconductor device in the power supply side. I identified it as a TOP234YN and found the data sheet here _http://www.powerint.com/sites/default/files/PDFFiles/top232-234.pdf

Unfortunately I don't know for sure whether it is at fault. Are there any tests I can do with my digital multimeter?

Furthermore, if it is faulty I then have a further problem - where to buy one from in the UK!

 

[2cvbloke]

No help here, but, Digihome's logo is made using the font from Star Trek: The Next Generation (or at least, most likely a free font based on the TNG font)... ;)

 

[Llew]

I came back from five weeks holiday to find that the Digihome PVR (one of many different badges applied to the Vestel PVR) had siezed up sometime during that time.

When this happens while I'm watching something I simply disconnect the mains plug and let it boot up again. This time it didn't restart! Goodness knows how long it been in that condition as it was quite hot to hold.

I checked the mains fuse (OK) and then looked for an internal fuse. There wasn't one and I couldn't see anything that looked like a fusible link either so I lloked around the rest of the board.

There were signs of heat around a semiconductor device in the power supply side. I identified it as a TOP234YN and found the data sheet here _http://www.powerint.com/sites/default/files/PDFFiles/top232-234.pdf

Unfortunately I don't know for sure whether it is at fault. Are there any tests I can do with my digital multimeter?

Furthermore, if it is faulty I then have a further problem - where to buy one from in the UK!

That's a chopper IC Paul. Farnell have them -

_http://uk.farnell.com/jsp/displayProduct.jsp?sku=9921427&CMP=KNC-GUK-FUK-GEN-SKU-OTH&s_kwcid=top234yn|3425065719

Normally any overload in the circuits after the power supply will switch it off via the feedback circuit. Could be something in the power supply itself, or just the IC given up the ghost.

Best to check any components (diodes etc.) for any S/Cs before replacing the IC.

Llew

 

[PaulR]

Solved the problem - well bypassed it actually.

I bought a "spares or repair" Wharfedale PVR (one of the many names fixed onto Vestel boxes) off Ebay for a fiver. I put the hard disk in the Wharfedale but I didn't like the menu structure so I lifted the PSU board out and put that in the Digihome.

Result - satisfaction.