I have problem with a Chinon 7000 8 mm sound projector in that when you switch it on it powers up but the motor does not start when you turn the knob to thread or forward. Its a brand new unit I bought it in 1979 if I recall and I used it about three times. Its been in the cupborad since till last week when I wanted to use it and it no longer works. Does anyone have any ideas as to what the cause might be?
I had already pulled the back cover off and removed the drive belt of the main motor to see if it wasn't a binding issue but got nothing. Is it possible there maybe a fuse somewhere the drive the motor that may have blown?
posted September 24, 2015 07:37 AM
I removed the back cover replaced the two 2A fuses with new ones, the motor started and ran a few seconds and then it all stopped again. Clearly there is short somewhere. I bumped up the fuse rating to see if I could get to restart but all I got was a little bit of smoke from the switch connected to the knob on the other side, hence I switched it off immediately. It could well be that its the switch thats malfunctioning if so does anyone have a switch or does anyone know where I could get one or can it be replaced with something else. Any ideas would be helpful.
posted September 24, 2015 05:28 PM
Yes I am well aware that increasing fuse size can do irreparable damage but in this case its not that bad at all. I had the same smell and smoke come from the machine it when I first turned it on so I assume the fuses blew then. I am going to see an electronics specialist and see if they can shed any light on the issue. From what I can see everything is fine mechanically and the electric motor is fine also. The issue is is likely to be in a switch or similar. Will let you how I go.