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mike calcott
Joined: 18 May 2006
Posts: 307
Location: Australia
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| Posted: Sun Aug 10, 2008 2:37 am Post subject: No Brightness control |
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I can adjust the brightness control with the on screen numbers showing up or down but with no effect to the actual brightness. Curt or any G70 users could you please advise.
Thanks Mike
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mike calcott
Joined: 18 May 2006
Posts: 307
Location: Australia
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| Posted: Mon Aug 11, 2008 5:56 am Post subject: |
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Curt Have you any idea what the cause of this is?
Thanks Mike
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Aug 11, 2008 1:35 pm Post subject: |
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What is the current brightness of the pic? Is it dim, fairly normal or bright?
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Aug 11, 2008 4:06 pm Post subject: |
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I know the D50s are plagued with this, not the G70s. It could be the PA board, or in the case of a G90 I had here, the CPU board(Ya/Yb) weren't sending data out to the video circuits. Same thing, numbers ramped up and down, nothing happened within the set though. Mind you, on the G90 that was for ANY function, not just the brightness.
If you want, send me the PA board and the RGB input board for testing, the brightness circuits are on that board as well..
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mike calcott
Joined: 18 May 2006
Posts: 307
Location: Australia
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| Posted: Mon Aug 11, 2008 10:52 pm Post subject: |
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The BA board for RGB input is the one you repaired for me so that should not be at fault. I will see if I can borrow a PA board to eliminate the problem before I get into intercontinental shipping. Thanks for the advice Curt.
Regards Mike
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mike calcott
Joined: 18 May 2006
Posts: 307
Location: Australia
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| Posted: Mon Aug 11, 2008 11:07 pm Post subject: |
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Curt, I cannot find a PA board in the exploded diagragm of the service manual. Did you mean the YA board? ( ignore this post I have found the PA board location )
Regards Mike
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