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1
Maintenance / Re: Enterprise 64 Video issue
« on: 2022.September.30. 08:45:54 »
Thanks for the guidance and confidence on the TR2 being the issue. I've now got some on order (got the BC212 and BC337 just in case) and will get that fitted in a few days when they arrive. Hopefully I can have a nice stable, straight image then!

2
Maintenance / Re: Enterprise 64 Video issue
« on: 2022.September.29. 20:42:45 »
Here's a pic showing the voltages I get all over that section.

3
Maintenance / Re: Enterprise 64 Video issue
« on: 2022.September.29. 19:55:57 »
@Judge

So I'm getting 7.73v on the right side as you marked out that 7812 reg.
9.38volts on the left side which I assume is the input
And if I measure the outer of the DC barrel and use the same ground point I get 10.12v

PSU lists output as 9.5V 2A output. So how are they getting a 12V regulator to regulate?. the centre pin of the regulator appears to be a dead short to other grounds.

4
Maintenance / Re: Enterprise 64 Video issue
« on: 2022.September.29. 14:10:17 »
Will check that out. thanks for the heads up. I didnt realise there was a 12v reg on there too. just the two 5v on the heatsink...

5
Maintenance / Re: Enterprise 64 Video issue
« on: 2022.September.22. 21:41:56 »
Checked all the pinouts on the scart end. added some grounds next to red/green/blue etc. just to be sure. still no better. I can get a non-moving screen, but its still got the bend on the image.

Tried scart direct again to several screens some older than others. Saw something of an image one time but it was wobbly again.

6
Maintenance / Re: Enterprise 64 Video issue
« on: 2022.September.22. 18:04:10 »
It does. 100ohm on the mains lines and I forget the other but yes. I took the cable apart and checked that.

7
Maintenance / Enterprise 64 Video issue
« on: 2022.September.22. 17:02:14 »
Hi All,

New member, pointed here from a facebook group.

I have an enterprise 64. It initially had really shaky video via the monitor port and a scart cable from Retrocables. I was advised to adjust the L2 variable inductor which slowed the shaky to a very slow wobble (sometimes I can get it static) but there's still an odd bend to the image (see attached). I've reacapped the board and checked and have 10.3v input to the regulators and 5.03v output (measuring elsewhere on the board I see around 4.95V).  Any suggestions as to what the issue might be? the image on RF was straight and looked pretty good for RF.

I have the scart fed into a scart to HDMI which is confirmed good. when I plug scart direct to several TVs it fails to lock and produce an image.

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