Re: Toshiba 37" inverter board failure
i will try i will look again
i think i found it
i will try i will look again
i think i found it
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Last edited by whatusername; 06-06-2014, 01:17 AM. -
Re: Toshiba 37" inverter board failure
maybe this is it it has continuity through the red lines to that first legAttached Filesif you find these attachements useful please consider making a small donation to the site
Last edited by whatusername; 06-06-2014, 01:18 AM.Comment
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Re: Toshiba 37" inverter board failure
You can verify if the 24V line from the power supply is feeding into the IN pin of the IC, last time you checked, it did not have 24V feeding the IC.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: Toshiba 37" inverter board failure
ok bud i replaced both ce901 ce92 caps and the ic that i think is qe90 cuz leg pin 2 did connect to the 24v line at the connector and i also replaced the zener diode de91 but still show a short...Now there is a set of 3 transistors on a heat sink if i go to the 24v on the connector pin it makes continuity with 2 of the transistors on both boards then when i test the other 2 legs on the transistors on my board with red on 24v pin and black on transistor legs in diode mode i touch it and it starts counting up then hits 1 on two of the transistors and both legs now on the board i bought same test it counts up and stops at 1033 on both never hitting 1 so is the ones on my board bad? could they be causing the short?
see pic with blue lettering of my boardAttached Filesif you find these attachements useful please consider making a small donation to the site
Last edited by whatusername; 06-07-2014, 12:18 PM.Comment
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Re: Toshiba 37" inverter board failure
ok well the answer is no i took them out of circuit and they test fine but in circuit different ball game and even with them removed it is not shorting out but i put the other ones in from the other board and the short is bad.. now 1 of the legs connect with a cap electrolytic cap can a cap cause a short if it is bad? its not bulging but i know that dont mean it is goodLast edited by whatusername; 06-07-2014, 02:59 PM.Comment
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Re: Toshiba 37" inverter board failure
i really hate this tvLast edited by whatusername; 06-07-2014, 02:59 PM.Comment
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Re: Toshiba 37" inverter board failure
i gave up i just jumped 12v from another connecter to the cut 12v lcd wire and it has video and my nephew is now playing an all night tournament on ps3 on it so lets see if it lasts the nightComment
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Re: Toshiba 37" inverter board failure
So your replacement board is bad, I hope you can return it. Using the external 12VDC 1.5A regulated power supply to power the T-CON is one of the option, I do not believe that the 12V power supply in this TV can handle the power amp and the extra 1.2A load form the T-CON for too long. You can get buck regulator module to drop convert the 24V to 12V.
http://www.ebay.com/itm/DC-DC-Buck-S...item5d4aae08c3Never 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: Toshiba 37" inverter board failure
i got a partial refund of the board because i started taking parts off it so out of the 55 he refunded 30 and i spent all day swapping out all those parts and testing and removing and testing and finally i just had enough. i have wayy too many other tv's sitting here to work on i spent enough time on this tv thanks for the link on the buck converter im gonna have to pick on up.. that's it for this thread on my part on to the next tvComment
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Re: Toshiba 37" inverter board failure
hello
i am having problems with the same invertor board.
I have changed the BD9897 , the 4 mosfets and the 2 680uf/35v
BUT still no image
i have the 24V, and i noticed that when power up there is a blue led on the invertor board that flashes 2 times.
i have 5v on the on/off pin, on the Status pin i have 1,8v for one second , then it goes to 0v
any ideea what shoud i check next?Comment
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All left and right refers to looking from rear of TV (or looking from front with TV upside down)- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
Hello, I came here after finding some similar questions asked on other monitors and hope someone here can help me get an ancient Viewsonic VP230mp (23" 4:3 LCD) back to working condition.
First a little background, I have a background in computer and electrical engineering, and I'm smart enough to know I know nothing about LCD displays and how they work. For this topic I'm as green as they come.
When the display is turned on the viewsonic logo displays in the uppper left for 2 seconds then the screen goes black, the power LED is green (on) and when a computer is connected... -
Hello everyone,
I've got a Benq power board of a XL2540K monitor which suffered from a power cut and is since defective / won't turn on. It's got obvious defects, some blown resistors, some burning around the drain pin of a MOSFET...
... and some 6-pin IC I struggle identifying, that is driving said MOSFET.
The IC is labeled as IC601, so someone with a circuit schematic could probably identify it really quick, unfortunately I can't find the schematics.
In other power boards of Benq for which I did find the schematics, IC601 is an 8-pin NCP1200 PWM controller - I suppose...
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