Re: LG 32LC7D no sound
Here are a couple pictures of the main board. Thanks for taking a look.
Here are a couple pictures of the main board. Thanks for taking a look.
Attached Files
-
-
Re: LG 32LC7D no sound
As expected there are a variety of voltage regulators on this main board. See this post for how to identify and test such devices.
https://www.badcaps.net/forum/showth...329#post261329Please 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.Comment
-
Re: LG 32LC7D no sound
Hi Tom, so I went ahead and checked voltage readings on all the regulators that I could locate. I listed the values below. Problem is I dont recognize any of the part numbers and have difficulty matching them on datasheet.com. Are you familiar with any of these or recognize any faulty values
Measured values: LG 32LC7D-UB
IC4022
BA022 7197
Pin1: 4.95
Pin 2: 0
Pin 3: 3.34
IC4016
KA78 09R
Pin 1: 12.02
Pin 2: 0
Pin 3: 8.95
IC4003
EH16A 64J48
Pin 1: 0
Pin 2: 3.27
Pin 3: 4.95
IC4008
SC156615M 0637 G0613111-1
Pin 1: 3.37
Pin 2: 3.34
Pin 3: 0
Pin 4: 1.19
Pin 5: 2.60
IC4013
05DZ11 sharp HU0
Pin 1: 6.45
Pin 2: 3.22
Pin 3: 4.95
Pin 4: 0.01
Pin 5: 0.00Comment
-
Re: LG 32LC7D no sound
All regulators appear to be working fine. I can think of a few other tests, but will need a schematic of the main board.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.Comment
-
Re: LG 32LC7D no sound
Hi Tom, thanks for the assistance. Unfortunately I do not have access to a schematic diagram. I will take a look online and see if I can find one.
Have you seen this problem before where the HDMI video is find but not the cable input?Comment
-
Re: LG 32LC7D no sound
Yes. It can be caused by a power surge damaging the HDMI processor (the device marked "10Bit")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.Comment
-
Re: LG 32LC7D no sound
So the HDMI processor also controls the analog/digital cable input? Just to be clear, the HDMI works fine.
Sorry..you probably already knew that but wanted to make sure...Comment
-
Re: LG 32LC7D no sound
Sorry, got that the wrong way around. In this case it would be a result of the cable/DTV tuner being damaged by a power surge or external event (wire touching cable line or local transient.)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.Comment
-
I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and... -
Hi, I have a Samsung UE50TU with:
- sound and backlight, but no picture
- when it arrived, it had a picture for a few seconds
- it keeps rebooting
- without ribbon cable between the two panel boards, it does not reboot but I have no picture
- without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
- when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.
- without cable between mainboard and lcd panel and with a jumpered... -
Hi Everyone,
I'm working on a Toshiba 37AV500A Regza TV.
The issue:
TV was working picture and sound went out. Green stand by light stayed on, It will respond to the power button being pressed (goes in and out of standby)
The TV will very intermittently work for around 40 mins then stop. This doesn't seem to matter if its hot/cold unplugged for a while etc.
I checked the PSU voltages and everything looked good.
No bulging caps or signs of heat.
24v aud = 24.41v
12v = 11.98v
5v = 5.062
p_o/f = Goes high... -
Hello everyone,
Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
Anyway I still fully expect that there has been something seriously damaged... -
Hi all
I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.
Symptom:
No picture no sound.
When I plug in the power cord, Backlight LED turns on for a half second and then turns off. The red LED next to the power button located center bottom flashes 2 or 3 times. When the power button is pressed after, it does the same thing.
No sound at all.
What I tried:
1. I tried unplugging the left or right ribbon...
Comment