Fujitsu display E19-5 service manual

[colder]

Hi,
Is available service manual for Fujitsu e19-5 (S26361-K1330-V160) pc monitor?
Maybe under different brand?

[colder]

Re: Fujitsu display E19-5 service manual

Now i noticed i posted this question under TV thread. Can be moved under Computer displays?

[R_J]

Re: Fujitsu display E19-5 service manual

What is the problem? I see there is a bin file available, could the problem be with the firmware ?

[colder]

Re: Fujitsu display E19-5 service manual

Can not power it on, no standby light on.
At beginning it was "solved" with unplugging from main supply, plugging it again.
But now is off permanent (only what i noticed when plugged in after a while, for a split second display goes on).
I tried changing power cables, dvi cable...i did not open it yet...

I thought if there is available service manual for described model or maybe it was made in partnership with some other brands with better service support...

[R_J]

Re: Fujitsu display E19-5 service manual

I would suspect an issue with the power supply, likely the small electrolytics in the primary circuit that are used on the vcc line of the switching ic.
Post pictures of the boards, maybe they are used in other models, if not maybe we can troubleshoot it by using the pictures of the board.

[colder]

Re: Fujitsu display E19-5 service manual

Here it is.
After opened i power it on, standby light was on for some time.
Voltage on out connector, pin "ON/OFF" was about 3.5V and "VOL" was about 3.5V (i think this is standby voltage).
Then i unplug it and plug it again, stand by light was off..."ON/OFF" voltage 0V, only "VOL" remained 3.5V.

All other voltages are there (measures done only on out interface). Only on board is displayed 12V it is actually about 15V.

[R_J]

Re: Fujitsu display E19-5 service manual

The standby voltage should be the 5v but the 12v should also be there.
I would replace C903 and C908 (in the heat shrink) they are likely weak causing a low or intermittent standby voltage.
I suspect the 5 volts supplies the main board and on the main board there will be a 3.5volt regulator that supplies the main board cpu etc.
If the power supply is in standby, the +12 volts could be a bit high, 15v because there would be no load on the +12v

I also see some poor solder connections on the board, D905 pins? I would check the board over and resolder any that did not look good.
The ON/OFF pin is not used, The POWER ON line does not seem to be connected either. it goes to JR803 and stops.

[colder]

Re: Fujitsu display E19-5 service manual

For C903 it is 50V 4.7microF. At moment at side i have one 50V 47microF.
What can be issue to replace it whit bigger cap value?

[R_J]

Re: Fujitsu display E19-5 service manual

You should use something close to 4.7µf, maybe up to 10µf, 47µf is a bit big and may take too long to charge and case a similar slow start problem.
I think I made a mistake calling it C903, I think it is actually C910 (C903 is the large rectangular cap)

[colder]

Re: Fujitsu display E19-5 service manual

Yes, it is C910. View angle from photo is misleading and i knew it you are talking actually about 910...
Just info, i found one cap 10uF, solder it and monitor is working...
I will wait to see how it behaves before close it in case...

Thanks for help