Samsung LN32A330: Possible Bad T-CON

[aviola7x7]

I recently picked up a Samsung LN32A330, specifically LN32A330J1D, that was having issues with displaying the correct colors. At first it looked like everything had a red tint but I realized that all of the colors just look terrible in general.

On the software side, I have:
-Seen that all inputs are affected
-Tried messing around with the color settings through the menu
-Done a factory reset

On the hardware side, I have:
-Re-seated the LVDS cable on both the main board side and the T-CON

I am thinking at this point that the T-CON may need to be replaced but I figured I would post here to see if anyone had any other suggestions or tests to do before spending the money.

I appreciate any help you all can give and will try to be as prompt as possible with getting any requested pictures or multimeter measurements.

[budm]

Re: Samsung LN32A330: Possible Bad T-CON

Bad Gamma Voltages, due to bad AS15 GAMMA Voltage ref. IC.
PCBA (PCB ASSEMBLY) # 35-D021291
http://www.shopjimmy.com/catalogsear.../?q=35-D021291

[tom66]

Re: Samsung LN32A330: Possible Bad T-CON

Yes almost certainly bad gamma IC, it would be possible to test if you have a digital multimeter. Replacement is easy if you have done surface mount work before. Otherwise a new T-con or a repair to the T-con is necessary.

[aviola7x7]

Re: Samsung LN32A330: Possible Bad T-CON

Yes almost certainly bad gamma IC, it would be possible to test if you have a digital multimeter. Replacement is easy if you have done surface mount work before. Otherwise a new T-con or a repair to the T-con is necessary.

Thanks for getting back to me. I have a digital multimeter so how would I go about testing to confirm?

[budm]

Re: Samsung LN32A330: Possible Bad T-CON

Meter in DC V 20V scale or auto, TV turned on, black probe on the metal chassis, red probe on GM1~GM14 test pads on the T-CON board, write down each reading with the GM# next to the reading.

[aviola7x7]

Re: Samsung LN32A330: Possible Bad T-CON

Meter in DC V 20V scale or auto, TV turned on, black probe on the metal chassis, red probe on GM1~GM14 test pads on the T-CON board, write down each reading with the GM# next to the reading.

Alright, the readings were:

GM1: 13.08V
GM2: 10.67V
GM3: 9.90V
GM4: 9.34V
GM5: 8.86V
GM6: 7.14V
GM7: 6.82V
GM8: 6.61V
GM9: 6.20V
GM10: 5.04V
GM11: 4.96V
GM12: 7.55V
GM13: 3.30V
GM14: 6.30V

Thanks again to all of you for your help with this!

[tom66]

Re: Samsung LN32A330: Possible Bad T-CON

Your readings confirm the gamma IC is bad,.