Hanns G HG216D flashing power button

[sebtailor]

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.

[retiredcaps]

Re: Hanns G HG216D flashing power button

1) What is the part number of the yellow and red circled components?

2) Provide a URL datasheet for both.

[sebtailor]

Re: Hanns G HG216D flashing power button

Red one:
Designation: FQPF7N65C
Type: 650 V N-Channel MOSFET
Datasheet: alldatasheet.com

Yellow one:
Designation: LD7575PS
Type: Green-Mode PWM Controller with High-Voltage Start-Up Circuit
Datasheet: alldatasheet.com

[selldoor]

Re: Hanns G HG216D flashing power button

I have been reading the previous thread. and two measurements you could do
are the one to the Jumper L803 and also the measurements on the voltage regulator at I104 and also state the part number of that.

Hi - think you may have missed this bit.- Voltages at L803 power supply and on the regulator I104 which is on the main board.

[sebtailor]

Re: Hanns G HG216D flashing power button

Hi - think you may have missed this bit.- Voltages at L803 power supply and on the regulator I104 which is on the main board.

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.

[terry]

Re: Hanns G HG216D flashing power button

Not sure if is going to help, I have one HG216D and ten HC174D all with the flashing power button. They all have the same problem "eeprom is corrupt".
I have tryed to get the eeprom of a good one with no luck.

[budm]

Re: Hanns G HG216D flashing power button

"When I disconnected the logic-board from the power-board, I got an all white screen."
It sounds like the main power supply is OK since the backlights do come on.

[Rik8119]

Re: Hanns G HG216D flashing power button

Hi guys,

i had the same Monitor with the exact same Problem. i test everything over and over. All bigger Caps were complete well, no shorts in any component, exchanged the 1084-33 and the eeprom I108. Finally i give in and disassembled the hole screen. In the end i have seen one of the neon tubes for background ligh was broken. Scince i dont know if it was broken before disassembly or during and there is no way to put it back together im out for this screen. But maybe this post can help anyone, could this be the reason why the screen is not switching on?


Greets Rik8119

[selldoor]

Re: Hanns G HG216D flashing power button

Rik8119
If you have one bulb you could continue testing the boards by using one of budm's test bulbs made from a cfl.

https://www.badcaps.net/forum/showth...ght=test+lamps.

If you decide to throw it out - perhaps give it away on freecycle
http://de.groups.yahoo.com/group/freecycle-bonn/

[infinity]

Re: Hanns G HG216D flashing power button

salut tt les monde je recherche les tension de sorti de cette allimentaion é merci

[lachlaan]

Re: Hanns G HG216D flashing power button

And here comes a little bit of necroing. I've got the same monitor, Hanns G HG216D, with more or less the same problem. When I plug it in you can hear a high pitch sound coming from the power board, between the filter cap and the transformer. If I hit the turn on button, it blinks with more or less the same pattern , producing a few clicks, followed by a high pitched sound, and then rinse and repeat. All the while the tension on the on/off switch goes from 3-4v to 0 and back up. The screen tries to light up, blinks white for a half a second then goes black again, with each loop of the led blinking. The voltage accross the large filter cap is as in sebtailor's case 325v DC. I checked the pins of the power connector to the main board, and all of them had the right voltage. The on/off pin displayed the same voltage bounce I read on the actual switch/button, and the 24v pin displayed 0V. Also the same as in sparks' case, if i detach the main board from the power board the backlight comes on. If you guys need more details I'll be glad to provide them, as well as photos.

[selldoor]

Re: Hanns G HG216D flashing power button

We have not had much success with these -please post 4 good clear pics of the front and back of each board -good light but no flash

pictures of each board, front and back (in the same orientation) and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.

Please do not post inline and offsite as they slow down the loading of pages.

Examples of what is needed

https://www.badcaps.net/forum/attach...7&d=1280167246

https://www.badcaps.net/forum/attach...6&d=1280167246

https://www.badcaps.net/forum/attach...4&d=1280167246

[lachlaan]

Re: Hanns G HG216D flashing power button

Alright, after many attempts I've managed to get somewhat clear images of the boards, front and back. Not so much the connectors, but I'll see about adding info on those tomorrow morning. If need be I also have a service manual PDF I could attach.

Power board front


Power board back


Main board front


Main board back

[graymon76321]

Re: Hanns G HG216D flashing power button

it is true or not cause the pin1,3,4 and pin2,5,6 is the same line? please answer cause i have hanns-g same model here and same problem. i want to know the true output cause i want to try to use other power supply w/ the same output. thanks

pin 1 no dc volts but 3.6v ac
pin 2 2.9v dc
pin 3 low voltage pulsing in time with front power led about .8v dc
pin 4 5v dc
pin 5 5v dc
pin 6 0v
pin 7 0v
pin 8 5v dc
pin 9 0v

[mikrodev]

Re: Hanns G HG216D flashing power button

Hi, I've got two identical HannsG monitors like this, one of them has this same problem. Boards look exactly like the ones already posted, no sign of anything damaged.

@graymon76321: I think your readings are ok, check them with the service manual here.

Both monitors were making that buzzing sound previously described, I resoldered C805, L805 and DS-3319. Great improvement, nearly silent now.

Tried the working power source with the broken control board; same result, blue led blinking.

I suspect the problem lies near Q107 in control board, voltages there are

B 2.62v C 2.49v E 3.26v for the working one and B 2.44 C 3.25 E 3.26 for the other.

Replaced caps near there, no change. Hope this helps


Dån

[mikrodev]

Fixed it

The problem is in the main board, not the power board. The D124 diode reads 1100 with the diode tester (while still soldered to circuit). Should be around half that value.

D124 is a 1A 100V rectifier (service manual says it should be a GS1B, but it is an M2). I replaced it with an M4 (1A, 400V) from a really broken board from another device. And... IT WORKS NOW!

I also replaced nearby caps while trying to repair the board, so it is possible that C124 was also damaged (however, I think it was not).

If anyone has a HANSS-G monitor with this problem, this should help.


Dån

[graymon62321]

Re: Hanns G HG216D flashing power button

Hi, I have monitor like this I just want to ask what is the value of big cap c805? Thank you

[valentin32]

Re: Hanns G HG216D flashing power button

Hello, same problem with the flashing LED with this HANSS-G monitor, Q107 in the control board, the voltage is E-3.26 B and the C-voltage "jumps" is not stable, what's the reason? Thanks

[valentin32]

Re: Hanns G HG216D flashing power button

So thanks to you mikrodev, replaced D124, VOLTAGE ON LINE 1.8 STABILIZED, MONITOR ON "GORIT" BLUE INDICATOR, PRESSED ON BUTTON ON "BURNING" 6 SECONDS AND 1 TIME IN 1 SECOND "DOES NOT COME" WHERE TO "KAPAT"? THANK YOU

[valentin32]

Re: Hanns G HG216D flashing power button

Kind time of day of the state experts, please I ask you tell me how to check the monitor's monitor for performance? Or a link to read, I have the signal RST # on the processor 0, the amateur himself, not professional.hobby electronics, thank you for your understanding