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Forum: Rear Projection Units   04-22-2017, 12:45 AM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Now that you have a work-around in place, there...

Now that you have a work-around in place, there is no pressure to find a board quickly. You could just order from samsungparts.com and wait 6 weeks.

It's nice to see that a set owner is willing to...
Forum: Rear Projection Units   04-21-2017, 08:26 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
I looked in the service manual, and I see that...

I looked in the service manual, and I see that there is a "RMC" board (Samsung BP96-02052A) which is available for $36. This is the IR interface board which contains the power button switch, the leds...
Forum: Rear Projection Units   01-27-2017, 06:08 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
I guess the difference would also be in the...

I guess the difference would also be in the optics, to spread the image out to a larger screen.

I have seen your symptoms caused by either or both of:
a) the large caps on the main-smps (the 300v...
Forum: Rear Projection Units   01-27-2017, 12:39 AM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
That is confusing; I would take it to mean the 3...

That is confusing; I would take it to mean the 3 Phlatlight LEDs that create the picture.

Did you ever get voltage readings on the 24 pin connector?
Forum: Rear Projection Units   01-26-2017, 05:57 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Sounds like you are measuring to ground, you're...

Sounds like you are measuring to ground, you're seeing 1/2 of the 328 volt input. You need to measure between the blue and brown wires. But that is a moot point because you are getting a nominal 16v...
Forum: Rear Projection Units   01-25-2017, 11:28 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Maybe, maybe not. The main SMPS has several...

Maybe, maybe not. The main SMPS has several sections, one of which could be bad (e.g. the 300v output). Voltmeter tests would tell more.

As for the sub-SMPS being bad, I have seen that problem,...
Forum: Rear Projection Units   01-25-2017, 06:18 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
The service manual pages you need are 6-1 thru...

The service manual pages you need are 6-1 thru 6-5.

For CN811 (cable 6, DC to the main board), I believe GND is equivalent to the chassis (or you could use one of the pins labeled GND).

For...
Forum: Rear Projection Units   01-25-2017, 04:32 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
The SMPS sounds like a good starting point. Do...

The SMPS sounds like a good starting point. Do you have a voltmeter? Do you know how to use it? Probing into the pins of the connectors is tricky, you'd need to attach fine gauge wires to the meter...
Forum: Rear Projection Units   01-02-2017, 03:55 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Your LED driver looks OK, superficially, but...

Your LED driver looks OK, superficially, but can't tell much from that. Stanman was referring to the sub-smps (BP96-01726B), the wedge-shaped board on the end of the chassis, which supplies power to...
Forum: Rear Projection Units   01-01-2017, 06:53 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Explain "picture lags". Few years? Hmm, I...

Explain "picture lags".

Few years? Hmm, I would suspect a power supply issue, like the caps are deteriorating. This is a common problem as sets age.
Forum: Rear Projection Units   12-02-2016, 06:47 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Yes, parts for this set are harder to find now...

Yes, parts for this set are harder to find now days, but not impossible. Usually things turn up on ebay from now & then, but you'd need to set up a search/notify, and then jump on it immediately.
...
Forum: Rear Projection Units   11-30-2016, 11:14 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Sorry, don't know anything about this set. Cant...

Sorry, don't know anything about this set. Cant be of any help.
Forum: Rear Projection Units   10-30-2016, 08:27 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
So, you've never opened it up to get the dust...

So, you've never opened it up to get the dust out? You should try that NOW, especially the LED heat sinks. Sounds like blue LED is overheating.
Forum: Rear Projection Units   10-23-2016, 08:12 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
I saw the post you made while I was composing. I...

I saw the post you made while I was composing. I think a factory reset would have set everything to default. I don't know how much you changed after the reset, but if it looks satisfactory to you,...
Forum: Rear Projection Units   10-23-2016, 04:16 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
The calibration function is for modifying the...

The calibration function is for modifying the gamma tables, I believe. These tables are stored in the main board, so replacing the DMD board would not change that. However, normally there are copies...
Forum: Rear Projection Units   10-22-2016, 12:23 AM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
The problem here is that you would have to do a...

The problem here is that you would have to do a lot of troubleshooting to narrow it down to what needs to be replaced. A color bar test pattern would be very helpful to analyze the extent of the...
Forum: Rear Projection Units   10-20-2016, 11:20 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
The splotches are magenta, not red, which...

The splotches are magenta, not red, which suggests a green channel issue. That said, this is not a common problem for which there is a solution discussed. It looks like the green channel data is...
Forum: Rear Projection Units   10-18-2016, 02:38 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Don't know. Has the set ever been cleaned...

Don't know. Has the set ever been cleaned inside? If not, you should immediately open up the lower back shell and vacuum out the dust, especially from the heat sinks. Particularly the DMD heat...
Forum: Rear Projection Units   10-06-2016, 06:55 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
That's about $20 more than they were 4 years ago....

That's about $20 more than they were 4 years ago. Not a big investment. It's when they're totally unavailable that you have to give up (and sell your working LEDs and modules on ebay).

Stanman is...
Forum: Rear Projection Units   10-03-2016, 06:29 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
One thing to beware of is short HDMI cables, they...

One thing to beware of is short HDMI cables, they can effect the HDMI handshake. I had a 3 foot cable from my HDMI switch box to a Samsung input, and under certain rare conditions in the equipment...
Forum: Rear Projection Units   10-02-2016, 12:58 AM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Its not red, its magenta, which is what you get...

Its not red, its magenta, which is what you get when the green channel is missing. I have seen this problem very rarely at power-up. It seems to be an HDMI sync issue. I can virtually always fix it...
Forum: Rear Projection Units   09-20-2016, 03:17 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
They are both power boards. The one on the right...

They are both power boards. The one on the right end with the slanted side is the sub-smps; due to the high angle on your photos, I can't really tell if the cap tops are bulging.

The third photo...
Forum: Rear Projection Units   09-16-2016, 10:32 AM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
There are some links scattered in this thread....

There are some links scattered in this thread. These kind of parts are available from Mouser, Digi-Key, etc.

You need to see if there are any caps that have bulging tops, they are the prime...
Forum: Rear Projection Units   09-15-2016, 08:43 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Sounds like a power supply problem. Most likely...

Sounds like a power supply problem. Most likely the sub-smps; sometimes the main-smps. This is a common issue, usually due to the electrolytic capacitors going bad. Mentioned often earlier in this...
Forum: Rear Projection Units   09-07-2016, 02:35 PM
Replies: 16,495
Views: 1,984,948
Posted By cosmicvoid
Simple... it's not an "all black" screen. As...

Simple... it's not an "all black" screen.

As for LED/laser lighting, it does require dumping to the light sink. For example, the red containing pixels are all set "on", and the pixels with no red...
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