MZ 80K repair project

S_U_C
Posts: 32
Joined: Sun Feb 17, 2019 6:41 pm

Re: MZ 80K repair project

Post by S_U_C » Mon Jun 15, 2020 10:06 am

Sounds like the horizontal synch has failed.
Check test points 13 to 21 on the video board with an oscilloscope, ( see page 40 of the MZ80K Service Manual) and compare with traces on pages 19/20.

ozzybetts
Posts: 7
Joined: Sun May 31, 2020 11:33 am

Re: MZ 80K repair project

Post by ozzybetts » Tue Jun 16, 2020 11:48 am

hlide wrote:
Sat Jun 13, 2020 4:23 pm
Sorry, that's beyond my skills.
Not at all; thank you for your support so far. Very much appreciated
S_U_C wrote:
Mon Jun 15, 2020 10:06 am
Sounds like the horizontal synch has failed.
Check test points 13 to 21 on the video board with an oscilloscope, ( see page 40 of the MZ80K Service Manual) and compare with traces on pages 19/20.
I don't currently have one and have never used one... :) , but am very intrigued to give it a go!
Do you think this would this be an appropriate purchase?
https://www.amazon.co.uk/Digital-Oscill ... 6286376031

hlide
Posts: 403
Joined: Thu Jan 25, 2018 9:31 pm

Re: MZ 80K repair project

Post by hlide » Tue Jun 16, 2020 1:24 pm

I have this one ; https://www.amazon.fr/Hantek-oscillosco ... 700&sr=8-5

You can have up to two analogical signals and up to 16 digital signals recorded through USB on your PC and displayed on you PC screen.

hlide
Posts: 403
Joined: Thu Jan 25, 2018 9:31 pm

Re: MZ 80K repair project

Post by hlide » Tue Jun 16, 2020 1:34 pm

Sorry the previous one is WITHOUT 16 digital signals. The right one with 16 digital signals is https://www.amazon.fr/Hantek-6022BE-Osc ... =hi&sr=1-4

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