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#2673 - 09/04/15 08:23 PM
Light Fixed Ethernet (Nothing on LCD)
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journeyman
Registered: 07/27/15
Posts: 52
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light fixed ethernet but not start unit Dreambox 800 Ethernet but fixed front light off, on one occasion I was on the front but has been less than a second I think it no has solution, but before throwing you wonder if there is any option attached photo 
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#2674 - 09/04/15 08:48 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Rubeneo]
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VIPF Japhar
enthusiast
Registered: 03/08/15
Posts: 218
Loc: Netherlands
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First thing to know if it's related to some voltage is to measure the main voltages. More info, see here.. http://jb8a8f8.com/support/index.php?threads/p5-fault-finder-pinout.13/
_________________________
Doing nothing leads to nothing. ------------- Please note, for technical support ------------- Will be given here, or on the jb8a8f8 forum and I prefer it in English. Johnny B. Click on the banner if you like to go there.. 
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#2683 - 09/05/15 12:05 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Johnny_B]
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journeyman
Registered: 07/27/15
Posts: 52
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#2743 - 09/11/15 02:25 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Rubeneo]
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VIPF Japhar
enthusiast
Registered: 03/08/15
Posts: 218
Loc: Netherlands
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You use the red probe on the ground, it should be the black probe, and with the red probe you do the measurements. Also it is easier to put the black probe in one of the screw holes, or to the chassis, those are also grounds. But most important, you seems to use the wrong mode, now you have it on AC voltage. If you want to measure the voltage, you need to set it on DC mode. If you want to measure the Ohm values, you need to set it on the Ohm measurements mode. If you want to measure a diode, you need to set it on the Diode measurements mode. Dc measurements you do with the 12v dc adapter connected to the motherboard because otherwise you will have no dc voltage measurements. Ohm, or diode measurements you must do without the power supply is connected to the motherboard. See the picture for your device settings. http://postimg.org/image/ybprfmzah/
_________________________
Doing nothing leads to nothing. ------------- Please note, for technical support ------------- Will be given here, or on the jb8a8f8 forum and I prefer it in English. Johnny B. Click on the banner if you like to go there..
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#2744 - 09/11/15 02:37 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Rubeneo]
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journeyman
Registered: 07/27/15
Posts: 52
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#2745 - 09/11/15 03:13 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Rubeneo]
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VIPF Japhar
enthusiast
Registered: 03/08/15
Posts: 218
Loc: Netherlands
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I've the picture link changed to a external place, http://postimg.org/image/ybprfmzah/
_________________________
Doing nothing leads to nothing. ------------- Please note, for technical support ------------- Will be given here, or on the jb8a8f8 forum and I prefer it in English. Johnny B. Click on the banner if you like to go there..
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#2746 - 09/11/15 03:26 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Johnny_B]
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journeyman
Registered: 07/27/15
Posts: 52
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Ok! measurement result
U20....3,83
U7......2,63
U22,U24,U25...1,27
U6......0,52
PSU...12,25
1 pin 1,23
2 pin 2,63
3 pin 3,32
4 pin 3,83
5 pin 0,52
6 pin 12,2
7 pin 0
8 pin 0
Problem pin5 and U6?
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#2747 - 09/11/15 03:30 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Rubeneo]
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VIPF Japhar
enthusiast
Registered: 03/08/15
Posts: 218
Loc: Netherlands
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Than it seems that you have a 5v failure, check the 0 ohm resistor on the U6 side, see if you have there the 5v. If so, replace the 0 ohm resistor. http://jb8a8f8.com/support/index.php?attachments/fault_finder_pinout_p5-jpg.22/If you have another type motherboard, without this U6 Dc to Dc ic, give me a image of the motherboard, both sides. But on the other hands, it seems to me unlikely because then you must also have issues with other sections that depends on the 5v. For a overview, see this 5v schematic. http://jb8a8f8.com/support/index.php?attachments/dm800-5v-circuit-information-jpg.176/
Edited by Johnny_B (09/11/15 03:48 PM)
Edit Reason: added more related info.
_________________________
Doing nothing leads to nothing. ------------- Please note, for technical support ------------- Will be given here, or on the jb8a8f8 forum and I prefer it in English. Johnny B. Click on the banner if you like to go there..
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#2748 - 09/11/15 03:47 PM
Re: Light Fixed Ethernet (Nothing on LCD)
[Re: Johnny_B]
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journeyman
Registered: 07/27/15
Posts: 52
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Attachments
01.jpg (74 downloads)02.jpg (74 downloads)
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