Mechanical adjusting the focus on my pj I noticed a strange thing.
With midpoint focus on 57 and contrast to 80 when I move everything I cannot obtain a good focus on green tube.
1- Center focus
2- Corner focus
Then I checked the 2pole/4pole rings and the defocused lines and dots are centered/round.
Now the strange thing:
The deflection block is fully against the CRT bulb (correct)
The focus unit is not 8-10mm apart from it (as shoud be and actually is on the R e B tubes) but is fully against the deflection block. To increase the center focus I shoud go even further.
Is there an electronic focus pot for the green tube that shoud be unadjusted on some board?
Joined: 05 Jun 2010 Posts: 2650 Location: Budapest, Hungary
Link Posted: Fri Apr 12, 2019 6:29 am Post subject:
Does the electronic focus work at all on green?
Does the green tube has the exact same part number as the other two tubes? _________________ projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
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