Hello Gents,
I have here a TV owned by a friend who suffered a brown out before the TV died. There is no signs of life on the TV.
I have some electronics experience, soldering, DVM, Oscope, experience.
I have checked the power supply board, analog board, and logic board for obvious failures, bad caps, smoke spots, etc. None have been found.
Voltages present at connector K8B with main power plugged in:
1)2.8V
2)0V
3)5.04V
4)0V
5)0V
6)12.16V
7)12.16V
8)12.16V
9)12.16V
10)0V
11)0V
12)24.48V
13)24.48V
14)3.28V
5Vstnby is also present at K8CTR pin 1 while pin 4 of the same connector is 0V until the power button is pressed then it is 3.21V
After hours of pouring over this forum, and the schematics, I have become lost in space...er I mean this schematic.
I assume the main logic board is sick, but wanted to get some confirmation first, and even a direction to head to save it if possible. I have a microscope to solder with so the small SMD components are not completely taboo for me to repair.
I have here a TV owned by a friend who suffered a brown out before the TV died. There is no signs of life on the TV.
I have some electronics experience, soldering, DVM, Oscope, experience.
I have checked the power supply board, analog board, and logic board for obvious failures, bad caps, smoke spots, etc. None have been found.
Voltages present at connector K8B with main power plugged in:
1)2.8V
2)0V
3)5.04V
4)0V
5)0V
6)12.16V
7)12.16V
8)12.16V
9)12.16V
10)0V
11)0V
12)24.48V
13)24.48V
14)3.28V
5Vstnby is also present at K8CTR pin 1 while pin 4 of the same connector is 0V until the power button is pressed then it is 3.21V
After hours of pouring over this forum, and the schematics, I have become lost in space...er I mean this schematic.
I assume the main logic board is sick, but wanted to get some confirmation first, and even a direction to head to save it if possible. I have a microscope to solder with so the small SMD components are not completely taboo for me to repair.
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