8mm Forum: Sound problems Elmo ST 600

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Topic: Sound problems Elmo ST 600

Brian Erikson
Junior
Posts: 4
From: Melbourne, Australia
Registered: Jul 2015

posted September 22, 2015 03:36 AM

Hi all , I need help for a elmo st 600
Track 2 records and plays back ok but it is muffled when I switch to track 1 and two, I can hear track 2 but low down
Track 1 wont record and playback just muffled sound
sometimes I can hear high piched sound from the movie
amongst the noise
sound meter works on both tracks when volume is high
any help welcomed

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted September 22, 2015 04:19 AM

The connections on the record switch may not be making good contact.
You could try to "clean" the connections by operating the record switch for a number of times. Make sure there is no film in the projector!

--------------------
Maurice

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Brian Erikson
Junior
Posts: 4
From: Melbourne, Australia
Registered: Jul 2015

posted September 22, 2015 05:43 AM

Thanks Maurice I have already done this but no change
I will keep trying this process

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted September 22, 2015 08:27 AM

It still sounds like a standard-issue case of switch contact oxides, but there are more contacts than just the record switch. (This is a leader among the usual suspects, though.)

Try this:

Unplug the machine. Find every sound related switch you can find and switch it about a dozen times. (I'm big on the track select switch in this case. I had this same thing happen on my ST-1200HD)

Go to every sound jack you can find: plug and unplug the correct connector into and out of it a dozen times also.

Plug the machine in and try the sound again.

--------------------
All I ask is a wide screen and a projector to light her by...

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Martin Jones
Phenomenal Film Handler

Posts: 1269
From: Thetford , Norfolk,England
Registered: May 2008

posted September 22, 2015 08:46 AM

Muffled sound, low sound and inablity or difficulty in recording are classic symptoms of "dirty" heads. Cleaning with Isopropyl (or spit) usally clears this.

--------------------
Retired TV Service Engineer
Ongoing interest in Telecine....

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Brian Erikson
Junior
Posts: 4
From: Melbourne, Australia
Registered: Jul 2015

posted September 23, 2015 01:56 AM

Thanks steve
I will do as you said ,I thought it was the track switch
but wasn't sure ,thanks to all posts
will update soon

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Brian Erikson
Junior
Posts: 4
From: Melbourne, Australia
Registered: Jul 2015

posted September 24, 2015 03:53 AM

I have removed the main circuit board and their is a smell
of burnt components .will check and see

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted September 24, 2015 04:02 AM

That's a good result Brian. At least now you have an idea where to start testing. Well done.

--------------------
"C'mon Baggy..Get with the beat"

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