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Messages - John Fante

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16
Hardware / Re: SymbiFace3 is near your Enterprise...
« on: 2020.September.19. 16:42:44 »
Sorry for the problems. I can't tests it until Monday, so better ask Hans on the Slack.

No problem! Just checking if others have the same issue :) The august DFU works great.

17
Hardware / Re: SymbiFace3 is near your Enterprise...
« on: 2020.September.19. 11:51:17 »
Today a new SF3 update has been released. You can find it on the official SF3 TMTLogic Drive page.

The enhancements of the SF3_EP_20200903.dfu are:

-The new SF3Boot.Rom version from Geco(also on the Drive) has been added inside the DFU. If no INI file is found or any error is detected, the SF3Boot Rom will be injected on the 60h segment.
-The F40 command to swap Audio modes have been expanded to select also the two MIDI modes, and now the SF3Boot.Rom benefits from this on the  new :SF3 AMODE command. Now the SF3 audio mode can be modified with a simple EXOS command.

Is there a bug in this release?

I have tried updating but afterwards the SF3 refuses to load the ini file and just goes into default 512K mode. Furthermore it does not autoload SF3BOOT.ROM when it can not find the ini file.

The DFU from august works fine on my setup.

It ofcourse can be my ini file that is not compatible with the new DFU but I do not think so.

I can take this to SLACK if that is the best :)

18
Hardware / Re: RF signal only black&white
« on: 2020.September.16. 20:48:22 »
Just curious but did you replace anything to get RGB/scart or was that going for the start? :)

19
Hardware / Re: Capacitors - wrong orientation?
« on: 2020.September.16. 20:45:01 »
Despite appearances, this is good orientation...

(Attachment Link)

(Attachment Link)

Ok. So the way it is mounted originally is the right way - despite what the schematics say? :)

20
Hardware / Re: Capacitors - wrong orientation?
« on: 2020.September.16. 17:51:13 »
Hmmm. Interesting. When I did my recap Ioriented my new C9 as it was on the board. + to the right. So I have the same layout as Wolfgang.

Here are the old. And here the new.

Not to hijack the thread but maybe this error is causing my noise. If it is an error, that is!

21
Hardware / Noise on RGB signal. Suggestions?
« on: 2020.September.15. 21:18:39 »
I managed to recap my "new" Egyptian EP and update to EXOS 2.4 :)

The machine works but I still have a strange noise problem on the RGB signal. See here.

Any suggestions how to find the source for that?

As far as I can see the components are fine but maybe something "broke" when I turned it on the fist time?

At first boot the machine was dead. Red LED on but no picture. With the help from this thread i managed to get it going.

The 5V rail was fine but 12V was way too low which cause the TR2 to fry (maybe killed by a bad C9). I replaced TR2 and C9 and the machine came to life :) But now I have a noise problem (see video).

To cure that I then recapped the board (took a while :) ). That is finished now but the noise is still there.

Any suggestions to where I should start looking for the error?

22
Hardware / Re: NOOB recap question :-)
« on: 2020.September.13. 08:11:37 »
Great! :razz: Thank you very much!

23
Hardware / NOOB recap question :-)
« on: 2020.September.12. 19:50:19 »
I am in the proces of recapping my Egyptian EP64 board.

I am out of horisontal 10 ferrit caps so I have to switch to vertical.

However I am a bit unsure if I am putting them in correctly.

In short my questions is if the end with the curve on the Phillips caps on a EP64 are +.

As far as I can see from my research it is but I want to be sure before I test.

The old cap is here. The end with the curve is in the bottom of the picture.

Thank you in advance. Judge have posted a picture of his recapped board but I must confess that I can't really see what end is + on his caps. I am a cap NOOB :)

24
Great! :) Thank you!

25
Yes :ds_icon_cheesygrin:
Meanwhile John solved it. If the C9 failed, then it is kill TR2, as it is also happened there. Another capacitors not a "life-critical", but good idea replace all avoid signal noise problems.

Cool :lol:  Just to be sure for the rest of the recap: On the vertical philips capacitors the line in one end is 0 (zero), right? Just so I don't - by mistake -  turn a capacitor the wrong way. The standing one has a big 0 on one side so they are easy enough.

26
I have allready written to http://www.commodoreszerviz.hu/billentyuzet_folia.htm regarding new membrames. Thank you very much for the tip/link :)

I have planed to continue replacing the caps while I wait for the keyboard membrame. Was just wondering if the "noise" problem was a known issue.

27
It is alive :ds_icon_cheesygrin: :ds_icon_cheesygrin: :ds_icon_cheesygrin: :ds_icon_cheesygrin: Replacing TR2 brought it back to life.

The keymembrame is dead (simply fell apart) and need replacement and I have a little noise on the picture but otherwise it seems to be functioning.

I have - so far - only replaced three caps so maybe the noise problem is there but it this a known problem? Besides the noise the picture seems rock solid (and better that an my old 128)

28
I managed (I think) to find the 78L regulator and have measured it :smt050 .

It shows 6,8 volt on the output pin and 8,3 on the input. I figure that that is not the correct value :)

I have changed the C9 capacitor and that did not make a difference so is the way forward to replace TR2 and maybe 78L12?

29
If the 5V is fine, have you got a volt meter and checked the 12V coming out of the 78L12 regulator? It could be that you're not getting 12V to the motherboard. Apparently the most common fix with 12V is to replace TR2 and C9.

I have not checked the 12V. Where is "78L12 regulator" more precisely located? :)

And thank you for the tip :)

30
Great to hear! Thank you for the feed back/review :)

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