MTX-512 Retrofit (2021)

About original Memotech hardware.
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SchmitS
Posts: 12
Joined: 27 Nov 2020 09:30
Location: Luxembourg

MTX-512 Retrofit (2021)

Post by SchmitS »

Hello
If this can help someone, this is a the report of the actions I did to change the power supplies and to exchange old components on my FDX and MTX.
This is to solve bad behaviors due to the aging time.

1: In FDX (See drawing on PDF)
A: New power supplies and load resistors (+5V, +/-12V, +24V)
B: New EMC Filter + Fuse
C: New Fan (+24V)
D: New 230Vac switch
E: New XLR Connector to supply MTX (Female)
F: New Wiring

2: In MTX (See drawing on PDF)
A: Removed all components of previous DC supplies
B: New supply XLR connector (Male)
C: New components to manage new supplies
D: New ceramic, tantal and electrolytic capacitors ( I exchanged all of them)
two capacitors of 10uF defect, (-12V) 470uF was yet 52uF, (+12V) 4700uF was crushed, 22nF broken ...
E: New printer connector
F: New 60 pins connector with extractor to FDX
G: New RCA connector for Audio/Video

Now it's time to clean and repair the keyboard ... to be continued
Attachments
IMG_20210408_093918.jpg
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IMG_20210406_154122.jpg
IMG_20210406_154122.jpg (3.93 MiB) Viewed 47 times
IMG_20210406_154100.jpg
IMG_20210406_154100.jpg (2.82 MiB) Viewed 47 times
IMG_20210325_172049.jpg
IMG_20210325_172049.jpg (3.12 MiB) Viewed 47 times
FDX - Supply.pdf
(645.47 KiB) Downloaded 4 times
SchmitS
Posts: 12
Joined: 27 Nov 2020 09:30
Location: Luxembourg

Re: MTX-512 Retrofit (2021)

Post by SchmitS »

Some pictures more
Attachments
IMG_20210408_094223.jpg
IMG_20210408_094223.jpg (1.39 MiB) Viewed 45 times
MTX - Supply.pdf
(1.18 MiB) Downloaded 4 times
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gunrock
Posts: 68
Joined: 28 Oct 2020 21:17

Re: MTX-512 Retrofit (2021)

Post by gunrock »

Wow! Looking thorough there Scmit!

Please keep the progress pics coming.
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