getting 3.22 volts from bl-on pin from av board and 5.36 from bl-on pin from ps, both readings are with boards unplugged at cn303, which is the connector for bl-on, but with the connector plugged in it reads .18 volts, does anyone know what this means, THANKS.
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Re: strange volt readings.
Make? Model? Does this belong in a different thread?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: strange volt readings.
Try applying +5v from a bench psu to the bl-on input of the inverter and see what happens.
Before doing this,check the resistance from bl-on input of the inverter for any s/c .As you unplugged the whole connector,you may have inadvertently taken a floating voltage reading .
RegardsComment
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Re: strange volt readings.
"getting 3.22 volts from bl-on pin from av board and 5.36 from bl-on pin from ps" The BL_ON signal form main board is routed through the PS board for clean wiring, so the BL_ON output of the PS board should be the same at the input of the PS board, input into one connetor is directly connected to the output connector, same for the dimming control signal. To force BL_ON on the inverter board, you have to diconnect that line first otherwise the main board which is forcing that line low will not allow the BL_ON to swing HI due to BL_ON is stuck LO on the main board.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: strange volt readings.
NO this thread is right where it belongs.Comment
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Re: strange volt readings.
Well providing us with Make, Model and pics would be a start to knowing thisComment
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Re: strange volt readings.
NOT in the mood for any smart ass comments, so if you brits can't be helpful, then go put your smart boy comments some place else.Comment
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Re: strange volt readings.
Well we are here trying to help and you telling us what make model etc would be a start, but since you have an attitude like that get help from somewhere else
Any users of this forum should read the sticky and know to put this info in the thread title.
We can't help anyone without knowing what we are helping with, TBH I'm not in the mood for your arsey attitude. GoodnightLast edited by newtothis; 11-18-2013, 08:23 PM.Comment
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Re: strange volt readings.
Just get off my thread idiotComment
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Re: strange volt readings.
you better go try ganging up on someone else, us yanks don't take crap from anyone boy.Comment
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Re: strange volt readings.
I think your stay here will be very short with comments like that, I will say no moreComment
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Re: strange volt readings.
I seriously doubt you will say no more, I think your a lonely boy....with no one to talk to.Comment
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Hi everyone,
Brought a non functionnal PS5. Apparently only a bad PSU...
No beep, nothing.
After some tests i found this :
- PSU is fine (12 volts stable)
- 12 volts line is shorted
- DA9065 was fried, F7003 also => Replaced both of them, short is gone on 12 volts line, no dead short anywhere else.
- By the way, nothing change. No signal, no power, no beep.
Mesuring all rails with my workbench psu (12 volts input)
- 0.00 amp drawing
- 12 volts, 5 volts, 2 volts, 1,15 volts are presents (suppose new DA9065 do is... -
I saw this switching power supply on eBay and wanted to see if could be modified to run 14.5 volts before the blocking diode was add and this switching power supply seems to have no issues doing this
I did recap the switching power supply except the the main filtering capacitors and I managed to break the selector switch for the voltage setting but just jumped it
One note I used 25 volt capacitors on the output side of this power supply because they used 16 volt capacitors and because I am running the voltage up a little bit higher 12 volts to 14.5 volts there would... -
I don't know the first thing about where to even start looking for the result I'm looking for ... but what I want, is a circuit ... or maybe a certain transistor ... that will remain "closed" when the voltage at the base is 5 volts, but when that voltage gets to 4 volts or less, I need that transistor to turn on - preferably with maximum saturation. I would prefer that it also does not even turn on a little as the voltage approaches 4 volts, but remains closed until that voltage hits 4 volts.
Now, it would be OK if it had some kind of marginal transition from zero saturation... -
Dell 3521 la-9104p getting 5 volts on vin section instead of 19 volt
dell 3521 La-9104p getting 5 volts on VIN SECTION on the ACP ACN
But when i remove IO getting 19 volt on VIN ( ACP ACN )
what is the problem
Without IO 19 volt is ok
WITH IO getting 5 volt on VIN -
Hello Sharp TV experts
Our Sharp LC-80LE642U displays one short one long flash error code which is a backlight error. I went into service mode and there were 8 lamp error counts recorded. I reset the count to 0 and did a reset. The last monitor error cause was 16 B00014639:12. 16 is the code for backlight error. I tried to power the tv up but went back into error mode.
> I checked voltages on the power supply board and they all check out .. including 3.28 volts at the error pin.
> There is power to the cpu and T-CONN and no faults found there. The cpu has a flashing...01-24-2025, 11:51 PM
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