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Main => Monitor/Video Forum => Topic started by: alienware32 on September 25, 2009, 12:14:15 pm

Title: 826 from 8 liners
Post by: alienware32 on September 25, 2009, 12:14:15 pm
having trouble with brightness pot it doesent work changed the pot still nothing here's the schematic
Title: Re: 826 from 8 liners
Post by: Ken Layton on September 25, 2009, 01:05:12 pm
What do you mean it doesn't work?

When you turn it the picture stays at full brightness? Or is it too dark all the time?

Have you adjusted the "screen" control on the flyback?

It appears transistors Q107 and Q108 are in the brightness circuit.

Title: Re: 826 from 8 liners
Post by: alienware32 on September 25, 2009, 01:07:55 pm
when i try to ajust the brightness with the pot it does nothing i can ajust it a little with the fly back
Title: Re: 826 from 8 liners
Post by: Ken Layton on September 25, 2009, 01:30:12 pm
Is it too bright or too dim?
Title: Re: 826 from 8 liners
Post by: alienware32 on September 25, 2009, 01:38:48 pm
too bright
Title: Re: 826 from 8 liners
Post by: Ken Layton on September 25, 2009, 03:23:19 pm
Check those transistors I mentioned as well as the resistors and diodes around them.
Title: Re: 826 from 8 liners
Post by: alienware32 on September 25, 2009, 03:24:01 pm
ok
Title: Re: 826 from 8 liners
Post by: alienware32 on September 25, 2009, 07:19:39 pm
got it narrowed down it the R119 were can i get one
Title: Re: 826 from 8 liners
Post by: Ken Layton on September 25, 2009, 09:11:31 pm
I see a R118 and a R911, but no 119 on the schematic.
Title: Re: 826 from 8 liners
Post by: alienware32 on September 25, 2009, 10:28:31 pm
it on the chassis right next to the signal input it marked 118 on schematic but r119 on chassis
Title: Re: 826 from 8 liners
Post by: Ken Layton on September 25, 2009, 10:45:32 pm
Radio Shack # 271-1108 Resistor, 100 ohm, half watt.
Title: Re: 826 from 8 liners
Post by: alienware32 on September 25, 2009, 11:08:08 pm
thanks ken
Title: Re: 826 from 8 liners
Post by: alienware32 on September 26, 2009, 05:16:15 pm
ken i need the q 107 can i get it at radio shack too
Title: Re: 826 from 8 liners
Post by: Ken Layton on September 26, 2009, 10:20:42 pm
you won't find that transistor at Radio Shack. It crosses to an NTE 290A. Check with your local electronics parts jobbers in the Yellow Pages under "Electronic Equipment & Supplies".