have a quick voltage question, I'm getting 11.54 coming from the a board goes down to 11.30 volts at the tcon, and still no red standby on front just steady green, no video or audio, black screen, is this proper or do I maybe need a new lvds cable, any ideas, Thanks.
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Re: sony KDL-46S4100 proper voltage
thinking 11.30 v at the tcon isn't enough to make it display.Comment
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Re: sony KDL-46S4100 proper voltage
Most T-CON operating Voltage range is +/-10%.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: sony KDL-46S4100 proper voltage
don't know where to measure the standby voltage, can't see the stby printed on board anywhere, sorry no pics., no access to camera, thanks.Comment
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Re: sony KDL-46S4100 proper voltage
I have the service manual and see the test points for the a board but not sure how to test it.Comment
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Re: sony KDL-46S4100 proper voltage
got a rebuilt a board from shop jimmy, then 1 from ebay, 1 gives me what looks like the age pattern when bl-on wire is unplugged the other just gives two different solid colors with bl-on unplugged, all the voltages from the connectors on g board test good, solid green light on front, no red standby light on front, flowchart says if volts are right at g board replace aboard but also says if no menu at all seen, and proper voltage at tcon, replace t-con, tried 3 t-cons, if not that it says bad panel, would I get back light if panel is bad?, THANKS.Comment
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Re: sony KDL-46S4100 proper voltage
wonder if I could do a factory reset without being able to see the menu?Comment
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Re: sony KDL-46S4100 proper voltage
only other thing I can think of, it might need the firmware replaced but no firmware for this model on sony website.Comment
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Re: sony KDL-46S4100 proper voltage
I'm thinking a power surge during a storm borked my firmware???Comment
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Re: sony KDL-46S4100 proper voltage
got different a board, have strange condition, with lvds cable unplugged from a board side only, get backlights on in about 8 seconds, with lvds unplugged from tcon side only, no backlight at all, any ideas?, THANKS. trying to post pics., having some trouble, will keep trying.Comment
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Re: sony KDL-46S4100 proper voltage
some pics.Attached FilesComment
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Re: sony KDL-46S4100 proper voltage
would like to test everything on the a board and tcon that I can with dmm, can't seem to find any good pics. or videos on the subject.Comment
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Re: sony KDL-46S4100 proper voltage
if all the voltages at my plugs on the g board are correct, does that usually mean I can rule out the g board?, thanks.Comment
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Re: sony KDL-46S4100 proper voltage
been reading the manuals, can't figure out why I have no red led standby on front, just steady green, anyone know what to check on g board or elsewhere, when no red standby on front?, getting proper voltages at g board to a board plugs, tried testing cn1 read 000 on 200 and 750 acv, unless I'm testing it wrong.Comment
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Re: sony KDL-46S4100 proper voltage
tested it wrong, there is 122v at cn1.Comment
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Re: sony KDL-46S4100 proper voltage
I was thinking there's supposed to be a red standby light on front, when tv is off and plugged in but none of my working tvs have that, it must be normal.Comment
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I found two capacitors on the board and one of the leads on one capacitor had bad soldering joint and the other joint connections not much better and there were several soldering joints that way to much flux around the joint redid several of them
The capacitors were a non brand that I did not recognize they got replaced and now it does not oscillating between relay but what concerns me a little bit is when the voltage is a little bit low the output voltage is around 130 volts and then drops down to 115 volts this happens around 105 to 108 volts if remember correctly
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Buenas mi nombre es carlos me uni al foro porque estoy buscando el schematic de una sony vaio pcg-41217u otras formas de escribirlo son 1p-0117j01-a012 mbx-237 numero de placa revision 1.2 o Sony VPCSB (MBX-237), en fin me gustaria y ayudaria un monton si alguien me puede dar dichi svhematic para hacer las mediciones de una laptop de la mencionada anteriormente(Sony VAIO PCG-41217U) con el fin de repararla dejo de funcionar solo prende el led de la bateria al pulsar el boton de power el disco empiesa a hacer ruido de actividad pero los leds del frontas no reflejan acividad y no enciende la pantalla.... -
3+1 Voltage Regulator for IMVP-7/VR12 CPUs
Compliant with IMVP-7/VR12, the ISL95831 provides a complete solution for microprocessor and graphic processor
core power supply. It provides two Voltage Regulators (VRs) with three integrated gate drivers. The first VR can be
configured as 3-, 2- or 1-phase VR while the second output is 1- phase VR, providing maximum flexibility. The two VRs share the
serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with the two chip approach.
Based on Intersil's Robust Ripple Regulator...11-05-2024, 03:24 PM -
Hi
Acer A515-43
LA-H801P
Fail: Does not charge battery, has low voltaje on connector.
Laptop didn't want to turn on, only charge led blinked.
I found PQB5 (mosfet high battery charger) in short, voltaje in +12.6V_BATT was 19 v ...
I changed it, changed PQB6 too and now battery charger voltage is 4.4V but battery is 3 cell, 11.25v, then is very low to charging.
Laptop turns on without battery and works fine, but with battery turns on and turns off inmediately, I suspect battery bad but I don't know... -
I want to know if I could hook up a solar panels to this boost converter would I have any issues doing and I would have issues what would they be
Adjustable Boost Power Supply DC-DC Constant Voltage Current Charging Module
https://www.ebay.com/itm/116497313155?var=416785404161
Here are some of the description from the eBay seller
The main parameters:
1. Product name: High-power non-isolated DC boost module power supply.
2. Product model: 100A2000W.
3. Input voltage: DC12V-60V.
4. Input current: 100A (maximum)....
Comment