8mm Forum: Elmo ST-1200: Sound, amplifier & record button issues

This is topic Elmo ST-1200: Sound, amplifier & record button issues in forum 8mm Forum at 8mm Forum.

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Posted by Akshay Nanjangud (Member # 2828) on January 19, 2012, 09:12 PM:

Hi guys,

I spent the past week working on my ST-1200 as and when I had time. Thanks to several forum members who responded, the picture is now excellent. However, there is no sound. Other users had similar questions on the forum and I followed those suggestions by forum members. Here's what I have done:

1. Sound head: made sure it rocks forward when the main power control knob is turned to F, dismantled the assembly as much as I could and cleaned the area.
2. Amplifier: took off screws, pulled it out as much as the wires would extend, cleaned the circuit board, checked to ensure all wires were connected and not hanging loose.

On one of the posts, there was a mention of pressing the record button in and out a few times. I have a problem here. In the picture, we see the red record button that can be pressed in and released by pulling up the small piece of metal under it. I can only do this when I have unscrewed the amplifier unit and not when it is screwed on. So, the red button can only stay out when the amplifier unit is screwed on. Surely, this isn't right, is it?

Please help! All I hear is a pop when I turn on the amplifier.

Posted by Winbert Hutahaean (Member # 58) on January 19, 2012, 09:20 PM:

When you open the back cover, the speaker wire connection will always automatically pulled out too. Did you re-connect it when you put the back cover back?

Posted by Akshay Nanjangud (Member # 2828) on January 19, 2012, 11:49 PM:

Winbert, here's the picture. You see, all wires are connected.

Posted by Winbert Hutahaean (Member # 58) on January 19, 2012, 11:56 PM:

Akshay, that's the front part. What i meant was when you changed the belt you must have opened the back cover. The speaker is attached to the cover. If you pulled out the back cover then the wire will be disconected.

Many people forgot to re-connect it when put the cover back resulting no sound is heard.

ps: but since you say that you heard "pop" sound when you turn the projector on, my advice above is most unlikely to happen. Pop means there is a connection between amplifier and the speaker. But just in case, please check the speaker connection

Posted by Akshay Nanjangud (Member # 2828) on January 20, 2012, 12:10 AM:

Sorry Winbert. I misunderstood. Here's a picture, looks fine, I guess.

Posted by Winbert Hutahaean (Member # 58) on January 20, 2012, 01:37 AM:

Aaah.... yes, your projector uses direct contact like that. Some projectors use male/female connector that can create a problem as I mentioned above.

So perhaps other members can help you.

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