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robnec
Joined: 27 Apr 2006
Posts: 87
Location: NYC
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| Posted: Mon Nov 06, 2023 9:14 pm Post subject: Sony g70 lost green tube focus |
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Hello. I have replaced a red tube in my projector and was ready to mount it. When watching a movie still in table set up projector lost focus on green tube. There was no sound or any other event. It projected the picture and kept convergence but no focus on green. There is no error displayed. What can it be?
It is late now. I will try to reset some boards tomorrow. Any other ideas? Robert.
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robnec
Joined: 27 Apr 2006
Posts: 87
Location: NYC
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| Posted: Tue Nov 07, 2023 11:04 am Post subject: |
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Hello. I replacesd focus board /left of red tube/ but it did not help. In service menu magnetic focus does not work. H and V focus is moving a picture but does not make it sharper. It throws a watchable picture but it is not sharp. Obviousely.
What to do? Replace a focus coil?
I have a second, working one for parts.
Robert.
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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: Tue Nov 07, 2023 3:19 pm Post subject: |
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That is the focus waveform generating board. It rarely fails. You need to change the focus output board that should be under the keypad.
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robnec
Joined: 27 Apr 2006
Posts: 87
Location: NYC
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| Posted: Tue Nov 07, 2023 4:27 pm Post subject: |
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Thank you for help. I am in Poland now and I do not have my all suport documentation here. Do I have to remove a keyboard to gain access to the board? I will try tomorrow to switch them. I have friends coming on Saturday to hang it and I hope to have it fixed till then. Please cbeck with me later. Robert.
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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: Tue Nov 07, 2023 9:17 pm Post subject: |
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It's been at least 10 years since I pulled one out, but yes, if I remember the keypad has to come out, as does a metal cover under it to expose the output board.
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robnec
Joined: 27 Apr 2006
Posts: 87
Location: NYC
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| Posted: Wed Nov 08, 2023 9:29 am Post subject: |
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Hello. It is 10 in the morning over here and projector is back in service.
As always Curt help was spot on. Thank you again for support. Replaced board fix focus problem.
Now I have to get a third one to fix the second. It will never end. Robert.
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