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Old 03-01-2018, 09:58 PM   #1
ngth82
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Default ST3151A05-5 T-CON Schematics for Insignia NS-32D201NA14 LED TV

Hi all -

I have an Insignia NS-32D201NA14 LED TV that i picked up today.
I visually inspected the boards and saw two parts are knocked off from the built-in T-CON.

The T-Con has the labeling "ST3151A05-5" which is built in to the CSOT 32" panel. I found the datasheet for the panel, but no schematics for this T-CON. The panel flex cable is bonded to the T-Con so i can't just replace the board.

One broken part is a resistor, and the other one is an 8-pin SOIC part. The IC markings show "G32 3311" on two separate lines. I can't find this online.

Does anyone have this information? I would be forever grateful!

Pics are attached.

Thank you and best regards,
Thomas
Attached Images
File Type: jpg IMG_4775.jpg (116.1 KB, 14 views)
File Type: jpg IMG_4776.jpg (206.4 KB, 21 views)
File Type: jpg IMG_4777.jpg (391.7 KB, 13 views)
File Type: jpg IMG_4778.jpg (390.8 KB, 19 views)
File Type: jpg IMG_4779.jpg (230.0 KB, 13 views)
File Type: jpg IMG_4780.jpg (136.0 KB, 12 views)
File Type: jpg IMG_4798.jpg (50.9 KB, 11 views)
File Type: jpg IMG_4782.jpg (282.3 KB, 14 views)
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I'm a hardware engineer focused on networking equipment for my day job. I void warranties and fix consumer electronics for fun.

Last edited by ngth82; 03-01-2018 at 09:59 PM..
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Old 03-04-2018, 01:58 PM   #2
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Default Re: ST3151A05-5 T-CON Schematics for Insignia NS-32D201NA14 LED TV

I fixed the TV.

For IC2: I traced the pad connections and found them to be:

Pin 1 - Grounded
Pin 2 - Grounded
Pin 3 - Grounded
Pin 4 - Grounded
Pin 5 - Pulled up to 3.3V through a 1kOhm
Pin 6 - Pulled up to 3.3V through a 1kOhm
Pin 7 - Pulled up to 3.3V through a 1kOhm
Pin 8 - 3.3V, with a small ceramic cap, probably 0.1uF/1uF for HF bypass. Most likely a VCC line.


This kinda looks like an I2C EEPROM pinout pin 5,6,7 could be SDA, SCL and WP.. Pin 8 is probably VCC. One of the pins on 1-4 is GND, the other three could be the EEPROM ADDR[0:2] select.

Looking at my original post, you see that pin 2 off of IC2 was broken off. Since the board connections indicate Pins 1-4 are all connected to GND, I globbed some solder to bridge pins 1, 2 & 3 together so they are all tied low.


As far as the broken resistor goes, the SMT markings on top says "1R0" - a 1ohm resistor. This is in series with a small value cap to GND. Probably a snubber circuit for pins coming out of the P28P 5562A IC at left. I'll get a replacement 1ohm 0603 resistor this week and solder it on. If it is a snubber circuit, it's not crucial for operation.

I fired up the TV as-is, and it worked!

Fixed. Thread closed. (i'll get that SMT resistor later...)
Attached Images
File Type: png EEPROM_IC2.png (306.4 KB, 11 views)
File Type: jpg IMG_4798.jpg (50.9 KB, 12 views)
File Type: jpg IMG_4931.jpg (351.4 KB, 11 views)
File Type: jpg IMG_4930.jpg (43.7 KB, 12 views)
File Type: jpg IMG_4934.jpg (74.6 KB, 15 views)

Last edited by ngth82; 03-04-2018 at 02:10 PM..
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Old 03-05-2018, 09:28 PM   #3
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Default Re: ST3151A05-5 T-CON Schematics for Insignia NS-32D201NA14 LED TV

Okay.. Update 2. I found out why those two components busted off. Pictures speak for themselves.

See attached.

I realized this after i was reassembling the chassis today.
Attached Images
File Type: jpg IMG_4943.jpg (248.4 KB, 21 views)
File Type: jpg IMG_4944.jpg (188.0 KB, 24 views)
File Type: jpg IMG_4945.jpg (213.3 KB, 23 views)
File Type: jpg IMG_4946.jpg (375.2 KB, 26 views)
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Old 03-05-2018, 09:42 PM   #4
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Default Re: ST3151A05-5 T-CON Schematics for Insignia NS-32D201NA14 LED TV

It's surprising how many times I've seen this also. People don't realize what happens when you put extended screws into a TV. Nice fix!
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Old 03-05-2018, 09:54 PM   #5
ngth82
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Default Re: ST3151A05-5 T-CON Schematics for Insignia NS-32D201NA14 LED TV

Right?!? I'm just happy the original owner didn't open it up!

The owner originally said the screen turns white on the Craigslist post -- most likely the T-CON ribbon cable was loose.

When i went to pick it up, he said the TV now does the lines on the screen.

My bet is that he originally had the TV hung up on the wall, and found random screws to reinstall the base that morning before i picked it up.
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Old 02-27-2020, 08:37 AM   #6
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Default Re: ST3151A05-5 T-CON Schematics for Insignia NS-32D201NA14 LED TV

¿Did someone know how to mirror the picture throw the t-con ST3151A05-8?
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Old 02-27-2020, 10:01 PM   #7
ngth82
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Default Re: ST3151A05-5 T-CON Schematics for Insignia NS-32D201NA14 LED TV

I think you'll have better luck starting your own thread instead of changing topics at the end of this one that i posted/solved March 2018.
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