Fujitsu Siemens 23" LCD Scaleoview

[budm]

Re: Fujitsu Siemens 23" LCD Scaleoview

Check and see if you do have dc Voltage (5V) on both ends of the fuse F1 with ref to the chassis/secondary side circuit ground. The connector is put back in correctly?

[0burn0]

Re: Fujitsu Siemens 23" LCD Scaleoview

Ok I am having bigger problems than i thought
two parts on panel PCB are missing on picture they are marked with red
and theres 2 new parts installed marked with blue

Now i dont know whats missing and i cant find pcb schematics

[0burn0]

Re: Fujitsu Siemens 23" LCD Scaleoview

Check and see if you do have dc Voltage (5V) on both ends of the fuse F1 with ref to the chassis/secondary side circuit ground. The connector is put back in correctly?

4,7V
Yes connector is installed correctly

[budm]

Re: Fujitsu Siemens 23" LCD Scaleoview

OK, did this problem happen before or after the repair works? Or it was the original problem.

[0burn0]

Re: Fujitsu Siemens 23" LCD Scaleoview

OK, did this problem happen before or after the repair works? Or it was the original problem.

its my friends monitor and he used it
when white screen started he told me that he only checked for bad capacitors
and he give me monitor
but i can see that soldering joints are bad
i just hope he didnt destroy panel

[budm]

Re: Fujitsu Siemens 23" LCD Scaleoview

It can be that the main board is not sending the signals (All the signals, which is unlikely unless the chip on the main board is completely dead) so you may want to verify that you do have correct voltages on the main board by at least checking the voltages of the LDO first, if the problem is on the T-CON board, then you also need to check the LDOs and the switching power supplies on that T-CON, you can see some of the voltage test points on the T-CON board.

[0burn0]

Re: Fujitsu Siemens 23" LCD Scaleoview

It can be that the main board is not sending the signals (All the signals, which is unlikely unless the chip on the main board is completely dead) so you may want to verify that you do have correct voltages on the main board by at least checking the voltages of the LDO first, if the problem is on the T-CON board, then you also need to check the LDOs and the switching power supplies on that T-CON, you can see some of the voltage test points on the T-CON board.

Ok i will
I did a research and i found that i am missing one component TC74A5-3.3VCT
its Temperature sensor
Tomorrow i will replace all Capacitors and i will check everything

If T-CON board is dead can i use another board to replace it i have two monitors with broken display but they are LG Flatron 19"

[budm]

Re: Fujitsu Siemens 23" LCD Scaleoview

The T-CON is part of the LCD panel glass assembly, you will have to replace the panel with the same model.

[R_J]

Re: Fujitsu Siemens 23" LCD Scaleoview

Is that a CHI MEI panel? model A220Z5 ? On mine that cap. is also not installed and U2 is marked:
MT
8J
04

[0burn0]

Re: Fujitsu Siemens 23" LCD Scaleoview

Is that a CHI MEI panel? model A220Z5 ? On mine that cap. is also not installed and U2 is marked:
MT
8J
04

it's A220Z1-P01 model
i tested panel with LG LS20WS MB and PSU and same results White Screen
Panel died

[selldoor]

Re: Fujitsu Siemens 23" LCD Scaleoview

Are you testing it with a signal source - vga or dvi

[bammbammfran]

Re: Fujitsu Siemens 23" LCD Scaleoview

I just checked two M220z-L01 that I have here and both have the 5 pin part at u5 which I think is part # BD5237G-TR
The part in your orange circle is also not installed on mine
and the 3 pin part that looks resoldered is a K1P and probabaly part number MMBT2222A

[R_J]

Re: Fujitsu Siemens 23" LCD Scaleoview

On my board the 5 pin device is labeled U2, on yours its labeled U5

[selldoor]

Re: Fujitsu Siemens 23" LCD Scaleoview

If you are getting a white screen did you check the fuse/s on the panel board.
What voltage do you get on each side of the fuse with respect to ground.

[0burn0]

Re: Fujitsu Siemens 23" LCD Scaleoview

If you are getting a white screen did you check the fuse/s on the panel board.
What voltage do you get on each side of the fuse with respect to ground.

I did, on first fuse it's showing 4.7v before and after fuse
on second fuse 13.8v

but when display is disconnected and orange indicator light start on second fuse voltage bump up to 19.8V

[selldoor]

Re: Fujitsu Siemens 23" LCD Scaleoview

Sorry -I now see I duplicated Budms question fuse is ok - as regards the 14v, it is unregulated so it is normal for it to be higher when the heavy load of the panel light is removed.
I did ask if you have a source connected when testing? some monitors revert to a white screen or a sequence of white blue green red or just sleep instead of displaying " No Signal

[0burn0]

Re: Fujitsu Siemens 23" LCD Scaleoview

Sorry -I now see I duplicated Budms question fuse is ok - as regards the 14v, it is unregulated so it is normal for it to be higher when the heavy load of the panel light is removed.
I did ask if you have a source connected when testing? some monitors revert to a white screen or a sequence of white blue green red or just sleep instead of displaying " No Signal

i didn't have panel connected when i was testing PSU voltage because when i connect panel there's no space to measure voltage and i cant see what i'm doing

It was connected to my MacBook Pro when i was testing