Digest for sci.electronics.repair@googlegroups.com - 4 updates in 3 topics

amdx <nojunk@knology.net>: May 28 03:02PM -0500

Made by Chamberlin.
Receiver quit working, PCB is labeled 14LG300F.
Need schematic.
 
Thanks, Mikek
 
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amdx <nojunk@knology.net>: May 29 10:01AM -0500

On 5/28/2015 3:02 PM, amdx wrote:
> Receiver quit working, PCB is labeled 14LG300F.
> Need schematic.
 
> Thanks, Mikek
 
Not finding any usable information on the net.
 
I pulled the board out, inspected it, found a 3 watt resistor
that runs hot, couldn't be sure about the value possibly 470 ohms,
measures 501 ohms, reinstalled resistor. Noted a sooty area on a
the white plastic connector and a slightly brown, baked area under
a transistor, thought maybe the transistor had smoked, checks OK.
Reinstalled pcb in door opener, still doesn't work.
This morning putting the remote control back in the truck, pushed the
button, huh, it works. Hard to fix it when it works.
We'll see how long this lasts. :-)
 
Mikek
 
PS. I still want a schematic.
 
 
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Ed Tom <f6ceedb9c75b52f7fcc0a55cf0cfbf5d_1016@example.com>: May 29 01:37PM

Hi, Can you help with a diagram for the threading of the rubber belt on the
Aiwa NSX 999 tape decks? Tks for yr anticipated help.
 
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John-Del <ohger1s@aol.com>: May 29 04:25AM -0700

Why bother? It's a late 80s machine (IIRC). Any VHS machine will play any tapes this dinosaur made, and there's NO reason to record new video on the VHS format. If you want to get it going for curiosity, I seem to remember changing some position encoders, basket down switches, and a dc-dc converter chip on the main board for no transport functions. Loading belts also fail but you would hear the motor running if that were the problem. All my notes on these have been long discarded.
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