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jbmeyer13
Joined: 03 Dec 2010
Posts: 1135
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| Posted: Sat Mar 24, 2012 12:47 am Post subject: G90 YA Board |
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Can someone tell me exactly where the YA board is in the G90?
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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: Sat Mar 24, 2012 12:48 am Post subject: |
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Right under the RGB board in the back.
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Sat Mar 24, 2012 1:30 am Post subject: |
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Its the one with the LED daughter board attached. Unscrew the backplate and the YA slides out the from the back.
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jbmeyer13
Joined: 03 Dec 2010
Posts: 1135
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| Posted: Sat Mar 24, 2012 3:17 am Post subject: |
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Yep, found it. Curt, your G90 doesn't have the 003a01e chip set:-) Looking at one tomorrow and wanted to know where the board was. From an internal perspective, the G90 is a more elegant design than the Marquee but it has 1000 screws to remove..LOL
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Sat Mar 24, 2012 4:01 am Post subject: |
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Are you wanting to replace the Marquee or just play around?
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jbmeyer13
Joined: 03 Dec 2010
Posts: 1135
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| Posted: Sat Mar 24, 2012 11:38 am Post subject: |
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I have wear on my blue tube and my green suddenly has what appears to be pin holes in the phosphor. I'd like to just find 2 minty used tubes but the reality is that these days you can find entire PJ's (with good tubes) for the price of tubes alone so I'm exploring all my options.
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Sat Mar 24, 2012 1:16 pm Post subject: |
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I totally understand that. I am exploring my options on moving back to Atlanta. With that, I will install one of the CRTs. I was thinking the G90, but now it may be one of the 909s.
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mc86
Joined: 20 Sep 2008
Posts: 767
Location: pittsburgh, pa
TV/Projector: ECP 4500 (Vidikron box), ECP4500+, wanting 07MS/07MTS, evaluating pc soft-blend
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| Posted: Sat Mar 24, 2012 3:04 pm Post subject: |
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For reference, I'va attached a marked-up picture I made for myself so I could have people on ebay look at the IC421 for me. IC421 is easy enough to find on the board.
Matt
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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: Sat Mar 24, 2012 3:13 pm Post subject: |
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That chip isn't the end-all-be-all IMHO. Some sets with that chip number have run for 1000s of hours, seems it's only SOME of those chips that go bad.
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mc86
Joined: 20 Sep 2008
Posts: 767
Location: pittsburgh, pa
TV/Projector: ECP 4500 (Vidikron box), ECP4500+, wanting 07MS/07MTS, evaluating pc soft-blend
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| Posted: Sat Mar 24, 2012 6:53 pm Post subject: |
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I think the way CraigR said it on this thread was perhaps best summary:
"There aren't as many of the non-003A01E parts so I don't know if we can make a certain conclusion. However, I don't think I have seen a bad IC421 other than 003A01E serial numbers."
Craig's point is that making statistical inferences based small populations is dangerous!
bests,
Matt
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Sat Mar 24, 2012 9:33 pm Post subject: |
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| mc86 wrote: | I think the way CraigR said it on this thread was perhaps best summary:
"There aren't as many of the non-003A01E parts so I don't know if we can make a certain conclusion. However, I don't think I have seen a bad IC421 other than 003A01E serial numbers."
Craig's point is that making statistical inferences based small populations is dangerous!
bests,
Matt |
That seems about right. Based on my limited knowledge it would seem there are no more than 20% of sets with the non-03A01E IC421 and that those that do exist seem to be non 'U' ie non US G90's.
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