Re: Funai (Emerson) LF501EM4F not turning on
Which set of leds is the 1.2V/47V reading from Led1, Led2 or Led3?
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Re: Funai (Emerson) LF501EM4F not turning on
IS there more i can remove to bypass or trick the main boardLeave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
Shouldn't there be 3 sets of reading for Led1,2 &3 output?
Edit,
Reading yor reply again I see there are 3 sets of readings.
Which led set is jumping up to 47V ?Last edited by dick_barton; 03-14-2017, 10:56 AM.Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
led connecor volatge is 0.75vdc/76vdc/0.74vdc/77vdc/1.2vdc<-(jumped up-down somewhat) 47vdc
You did catch that R1108 R1208 and R1308 were removed correct?Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
Can you confirm that with all the jumpers in place and the mainboard disconnected all the leds are powering on and the led voltages at the connector are identical. I think you said 78V in an earlier post.
From what I can make out the 3.3V which should be measured at the Fault inputs to the Led Drivers (pin7) comes via R3189 in series with R3917, both 33K resistors, when Q3103 is not switched on.
When any of the led driver are in Fault condition the corresponding 1K resistor at pin 7 is connected to ground though the IC's internal mosfet. Since these resistors are in series with R3917, this causes Q3013 to switch on.
This will be the case for any of the led drivers should a Fault condition be activated.
When Q3013 is switched on because of a Fault condition this results in the 3.2V you read across R3193Last edited by dick_barton; 03-14-2017, 06:34 AM.Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
Would R3193 be the correct place to check? I read 3.2vdc on one side nothing or jumps to -0.000Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
OK, I just look through the service manual, there are two schematics for the main board, one is type 'A' and the Micro Controller is IC3005 (R8A05011BG-U0). The type 'B has IC3001 (MSD8200DS-S1) as the micro controller. The way PROTECT3 is connected is not the same for the two versions.
So you need to find out which version you have by looking for IC 3005 (for 'A'), or if it has IC 3001 for 'B' version.Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
I only have the power supply board layout but not the mainboard layout so unfortunately I cannot help to locate it.Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
The resistor should be on the mainboard and possibly close to IC3005Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
Somehow you will need to find out if that 3.3V gets all the way to those pull-up resistors or not.Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
c3660 reads 3.25vc P-ON+21v reads 21vdc and AMP+13v reads 13vdc
http://www.tvparts.ca/images/product...2876462323.jpgAttached FilesLast edited by jayjoesph; 03-13-2017, 04:03 PM.Leave a comment:
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Re: Funai (Emerson) LF501EM4F not turning on
Well, you do have AL+3.3V at the main board connector, right?Leave a comment:
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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... -
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 There,
This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.
After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.
More Details
TV Model - LG OLED77G1PUA
Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt... -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"...
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