Re: Hanns G HG216D flashing power button
Didn't miss it, the values are the same as the ones of the original poster. I measured them again on my board anyway:
L803 has 26.6 V
I104: pin 1: 0V, pin 2: 3.29 V, pin 3: 4.75 V, which should be within tolerance of that part....
sebtailor
New Member
Last Activity: 06-07-2012, 01:09 PM
Joined: 06-01-2012
Location: Saxony
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Re: Hanns G HG216D flashing power button
Red one:
Designation: FQPF7N65C
Type: 650 V N-Channel MOSFET
Datasheet: [URL="http://pdf1.alldatasheet.com/datasheet-pdf/view/100471/FAIRCHILD/FQPF7N65C.html"]alldatasheet.com[/URL]
Yellow one:
Designation: LD7575PS
Type: Green-Mode PWM Controller with High-Voltage Start-Up Circuit
Datasheet: [URL="http://pdf1.alldatasheet.com/datasheet-pdf/view/208706/ETC2/LD7575PS.html"]alldatasheet.com[/URL]Re: Hanns G HG216D flashing power button
Red one:Leave a comment:
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Re: Hanns G HG216D flashing power button
C805 measures exactly 313 V DC between the pins, with only the logic board connected, the screen itself is plugged of.
I'm aware that the caps' installment isn't looking good, but it shouldn't make a difference now, should it? I'll try to improve that now anyway, since I have nothing better to do until you come up with another idea ;-)
Thanks for everything so far.Leave a comment:
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Re: Hanns G HG216D flashing power button
Alright, I made some photos with my mobile phone.
They're better than I expected, I hope you can see enough.
The logic-board looks terrible, I know, my bad. But I assure you, there is no visible collateral damage to other parts, all contacts seem to really contact and there are no shortcuts any more. But there could have been, because some pins could have contacted the monitor's housing when I powered it the first time after recapping....Leave a comment:
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Re: Hanns G HG216D flashing power button
Quick answer to that: Of course I didn't use a lower voltage or a different capacity. I took a slightly higher voltage (35 V instead of 16 V) in two cases on the logic board. What I meant to say is, that I did not take higher voltages generally to improve the boards lifespan as suggested on various sites.
Any specific parts of the boards you want pictures of?Leave a comment:
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Re: Hanns G HG216D flashing power button
First: Thanks so far.
I'll try to answer all additional questions as good as I can.
Pictures: Both boards originally looked exactly as seen on the photos in the first post. Since I have altered the caps, I cannot provide photos of the Boards in their original state.
Furthermore, I have no High-Res Camera at hand, but I'll try to borrow one. I assure you, that I didn't alter anything except the caps.
Summary of the Problem: I got monitor already nonfunctional (for free). The screen stays black, the...Leave a comment:
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Re: Hanns G HG216D flashing power button
I replaced all electrolytic capacitors on both boards now, but it didn't do anything. Symptoms are still as mentioned above.
The only difference I could find is that I do not get a 3,9 V AC Voltage at Pin 1 of the Power Board-Logic Board connector.
Furthermore I hear a repeating short noise from the big cap C805 that sounds like a loading capacitor - again and agein. I hope that is understandable.
Any idea what I could do?
As a notice: Since I'm in Germany, I've got 230 V AC input.Leave a comment:
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Re: New Members - please post your introductions here
Hello everyone,
I joined recently to ask for help repairing my monitor. I'm from Germany, but I didn't find a site like this in my native language, so I came here.
Please forgive my if my English isn't perfect!Leave a comment:
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Re: Hanns G HG216D flashing power button
I have the same problem with my monitor here, and I was planning to replace the caps on the video board as suggested, but I'm unsure what replacements to use. I know how to replace parts from a board.
My problem is: There are different caps with the same voltage, capacity and temperature specs, but they differ in colour and a remark like "SG", "SGA", "HT", "LS" or "SH", what do they mean, if the mean anything?Leave a comment:
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