Print Page - Cpc6128 seems dead

Title: Cpc6128 seems dead
Post by: Winch20010 on 18:07, 26 March 22

Hello,
I have a cpc6128 who does not light up anymore. I see some people have this issue, and have sand the power switch on the main board.
My question is : there's a 5volts cable going to the keyboard from the display.
Shouldn't we have 5v on this cable if we switch-on the display ? Even if the keyboard is not plugged in ?
Because I see 0v there.
Is there a way to test if the issue is in the keyboard or the display easily ?

Thanks !!
Sebastien

Title: Re: Cpc6128 seems dead
Post by: tjohnson on 20:26, 26 March 22

You should get atleast 5v on the the cable from the monitor, easy test is find another 5v PSU and plug it in and see if you get a response and beep from the computer

Title: Re: Cpc6128 seems dead
Post by: Winch20010 on 21:16, 26 March 22

Thanks for the answer.
So bad news for me :(
it will be complicated to find now the broken component ...
The only fuse i saw is still ok.

Title: Re: Cpc6128 seems dead
Post by: Kris on 08:25, 27 March 22

Just try to shunt the power switch: remove the connector and connect both pins together.

Title: Re: Cpc6128 seems dead
Post by: Bryce on 09:35, 27 March 22

Quote from: Kris on 08:25, 27 March 22Just try to shunt the power switch: remove the connector and connect both pins together.

@Kris : He has already established that the monitor isn't delivering 5V.

@Winch20010 : Consider getting a SCART / PSU kit and connect the CPC to a TV with SCART (assuming you have one).

Bryce.

Title: Re: Cpc6128 seems dead
Post by: Kris on 10:05, 27 March 22

Quote from: Bryce on 09:35, 27 March 22@Kris : He has already established that the monitor isn't delivering 5V.

Arg, you're right, I read it too quickly.

@Winch20010 :Use the schemtaic and follow the 5V rail and check components

Title: Re: Cpc6128 seems dead
Post by: Winch20010 on 10:27, 27 March 22

Yes Bryce, I will go with a SCART option.
this is unfortunate for the monitor, but no choice there :(

I did some tests this morning and confirm that the 220V is coming to the board (power switch OK), but no 12v and no 5V
Few zeners show 2.X volts, but no voltage going to the 12V regulator for eg...

Title: Re: Cpc6128 seems dead
Post by: eto on 14:20, 27 March 22

Quote from: Winch20010 on 21:16, 26 March 22The only fuse i saw is still ok.

There should be 2 fuses in the GT65. See picture here: https://oldcrap.org/2018/11/04/amstrad-schneider-gt-65-monitor/

And make sure to remove it and have a look. More than once the fuse looked OK but actually wasn't when having a close look.

Title: Re: Cpc6128 seems dead
Post by: Winch20010 on 14:38, 27 March 22

this is not the same monitor for amstrad 6128. fuse was also tested (I only found one)

Title: Re: Cpc6128 seems dead
Post by: caver99 on 14:06, 01 June 22

is the monitor displaying anything, try feeding 5v from a different source into the cpc and see if the led lights and if there is a pic on the screen.
if its just the 5v on the monitor shouldn't be to much of a problem finding the dead part.

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General Category => Amstrad CPC hardware => Topic started by: Winch20010 on 18:07, 26 March 22