Siemens FM324 Video 2000 making nonsene - UK Vintage Radio Repair and Restoration Discussion Forum

Joe_Lorenz · 24th Jan 2022, 10:50 pm

Hello,
one of my sons has made the decision to put that old FM324 back into service again. To be able to digitize some old family video tapes, that is the background.
He has been able to fix the psu as there were several electrolytics leaking badly. All voltages +150, -150, +33, +20, +12V, +5V are there. So far, so good. Unfortunately the control unit will perform any possible action at random now on power on, and the display is still dead.
Has anybody out here similar experiences on those machines? I'd love to have an idea where to look next. I am afraid there is a cpu 8501 or so that refuses to do it's job.
Regards, Joe

Maarten · 24th Jan 2022, 11:12 pm

That's a Grundig made machine. Riddled with tantalum capacitors that possibly go short circuit. I think there's also a position switch on the mechanism that can get dirty/oxidized.

Joe_Lorenz · 25th Jan 2022, 10:07 pm

Oh, well, Tantalum!

That may be a good track to follow next! I know the machine is almost identical to a Grundig 2x4.

Thanks, Joe

24th Jan 2022, 10:50 pm	#1
Joe_Lorenz Hexode Join Date: Dec 2019 Location: Hohenroda, Eastern Hesse, Germany Posts: 462	Siemens FM324 Video 2000 making nonsene Hello, one of my sons has made the decision to put that old FM324 back into service again. To be able to digitize some old family video tapes, that is the background. He has been able to fix the psu as there were several electrolytics leaking badly. All voltages +150, -150, +33, +20, +12V, +5V are there. So far, so good. Unfortunately the control unit will perform any possible action at random now on power on, and the display is still dead. Has anybody out here similar experiences on those machines? I'd love to have an idea where to look next. I am afraid there is a cpu 8501 or so that refuses to do it's job. Regards, Joe

24th Jan 2022, 11:12 pm	#2
Maarten Dekatron Join Date: Dec 2007 Location: Haarlem, Netherlands Posts: 4,203	Re: Siemens FM324 Video 2000 making nonsene That's a Grundig made machine. Riddled with tantalum capacitors that possibly go short circuit. I think there's also a position switch on the mechanism that can get dirty/oxidized.

25th Jan 2022, 10:07 pm	#3
Joe_Lorenz Hexode Join Date: Dec 2019 Location: Hohenroda, Eastern Hesse, Germany Posts: 462	Re: Siemens FM324 Video 2000 making nonsene Oh, well, Tantalum! That may be a good track to follow next! I know the machine is almost identical to a Grundig 2x4. Thanks, Joe