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Post by jaredjaric on Sept 29, 2015 8:14:38 GMT -5
HI Guys.
Hope anyone can help.
My cinemax is shutting down after powering up with image or video.
I can hear clicking noise inside when it is on for a few seconds than it shuts down.
It is like the protection circuit kicking up and shutting it down.
I was testing it for a few days w/ a lumagen and the moome port 3 barco card.
I was able to have the lumagen sync with my ps3 after inserting an HDfury Doctor hdmi between the PS3 and Lumagen.
The Pj was working normally for the past three days until tonight.
Is it possible that the H board is the culprit ? i did not smell or felt anything burning or arcing , just mainly clicking noises.
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Deleted
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Post by Deleted on Sept 29, 2015 9:21:10 GMT -5
In your other post you wrote that you where ignored. Did you read Hulio's response? He advised on checking caps for the standby voltage. That post was quickly removed.
What do your leds read? Leds on the second smps, horizontal and eht.
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Post by mastertech on Sept 29, 2015 9:52:30 GMT -5
Agreed, this is the bulletin: repairalmostanything.com/attachment/download/95
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Post by jaredjaric on Sept 29, 2015 11:04:54 GMT -5
In your other post you wrote that you where ignored. Did you read Hulio's response? He advised on checking caps for the standby voltage. That post was quickly removed. What do your leds read? Leds on the second smps, horizontal and eht. Good day Redfox ,thanks again for your response. This is another cinemax that i use to swap boards with, it has always been working fine. The other cinemax is working smoothly now, i followed Hulio's tips and changed the caps. But it was more a readjustment of the raster width and 17v rail that fixed the power up issue. This was also pointed out by Hulio. This second one , i would assume no eht fail or scan fail and i can actually see the leds light up. No scan fail leds lit because it shoot out the video for a minute, then turned off. After repeatedly switching it on, it just would shut down immediately after all leds in G2 diagnostic board lights up. I am planning to swap out the smps and h def board, but would welcome any suggestions. |
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Post by jaredjaric on Sept 29, 2015 11:34:00 GMT -5
Do you guys think the amplifier mosfets on the h def board is failing?
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Post by mastertech on Sept 29, 2015 14:52:02 GMT -5
Is there not an led for horz deflection failure?
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Deleted
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Post by Deleted on Sept 29, 2015 16:09:07 GMT -5
There is also diagnostics in the menu's.
red led on smps2 should be on when scan failure.
red led on horizontal too when that unit fails.
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Post by jaredjaric on Sept 29, 2015 22:43:45 GMT -5
Is there not an led for horz deflection failure? Can not say i did see a red led on. when it shuts down. |
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Post by jaredjaric on Sept 29, 2015 22:46:42 GMT -5
There is also diagnostics in the menu's. red led on smps2 should be on when scan failure. red led on horizontal too when that unit fails. Do not seem to see any red leds lit on the smps. I will try the RGB switcher, Case the corvette man seems to have this same issue with his cinemax. |
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Deleted
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Post by Deleted on Sept 30, 2015 1:15:35 GMT -5
Now you mention it I did have it too. With a different Moome I had reboots during the handshaking of the Moome.
Most likely your smps is the problem.
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Post by Casethecorvetteman on Sept 30, 2015 4:48:18 GMT -5
If the EHT fails the set will shut down, but there will be a red LED on the EHT board if it does, and if it does, the quad is likely at fault.
I have had this issue where the EHT would come up for as long as one minute, and then picture would rapidly collapse with a crackle sound. That fault was the quad, however dont rule out the splitter.
Turn on the set with the rear cover open, looking at the EHT board, and see if that red light comes on. At this point id be looking to that. Rule it out, then we can go from there.
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Post by Casethecorvetteman on Sept 30, 2015 4:52:35 GMT -5
There is also diagnostics in the menu's. red led on smps2 should be on when scan failure. red led on horizontal too when that unit fails. Do not seem to see any red leds lit on the smps. I will try the RGB switcher, Case the corvette man seems to have this same issue with his cinemax. The switcher was not the issue, although the issue did change with that swap, as it did with a different MOOME. That issue was traced eventually to the system board. Start with the EHT and see if that light comes on. From there, you could try swapping the system board, it may be the issue, and worth a look later. |
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Post by Casethecorvetteman on Sept 30, 2015 5:10:43 GMT -5
Now you mention it I did have it too. With a different Moome I had reboots during the handshaking of the Moome. Most likely your smps is the problem. Id be reluctant to believe that at this point. A faulty SMPS probably wont be making the set do what it is. Looking on the SMPS 2, there is a range of LEDs that indicate voltages are present, pulling the board out if you need to and see which ones indicate what. The newer style boards have surface mount LEDs, the older style has small round LEDs. Ive had an issue with the SMPS causing a fan fail shut down, but youll get a visual indication on screen for that. Start with that EHT as i said, then while doing that look at the SMPS 2 LEDs, i doubt youll see an issue there. A sure test of the system board is to set the jumper marked "W2, FORCE SMPS ON". Set that jumper on, turn on the set with a source you know works, and wait for shut down. The set will 'partly' shut down, as in convergence and focus etc will go to complete neutral, but the image will remain. That is a certain system board failure in my experience. |
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Post by jaredjaric on Sept 30, 2015 10:59:07 GMT -5
Ok , Just swapped out the smps and the H def oard, still the same issue.Though it did started up nicely and was able to project video for a few seconds about three times.
It seems it likes to start up when it is still cold but after successive shut downs , the pj just shuts down right after power up.
i could rule out the eht ,smps and h def board at this point.
I did notice the clicking noise coming mostly from the rgb video boards. And pulled out the rgb board, the voltage regulators were quite hot for something that was not used much.
I will replace those 7905, 7805, 7912 7812 and report back later.
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Post by Admin on Sept 30, 2015 11:20:34 GMT -5
Regulators do not usually get hot from being bad, providing the line in is fused. They get hot from excessive current draw from another location.
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