Hello everyone. I am trying to repair a TV for my friend, and hopefully learn some things in the process. The TV powers on and the screen lights up for a few seconds. The screen then shuts off and the speakers start making a distorted static noise.
Using a flashlight, the screen appears to still be on. But the back light is definitely off. It will stay on until it's turned off, so the cpu isn't turning the whole set off, just the screen and/or backlight.
I found the service manual online, you can download it here:
http://www.electronica-pt.com/esquem...7819-00-25116/
I'm getting low voltage readings on several chips. Pin 48 on IC800 is reading 2.6V. On IC1670 Pin 1, the input, is giving me 14.1V and Pin 2, the output, is giving me 8.6V. And on IC 1630, Pin 1, input, is reading 2.3V, and Pins 3 and 6, outputs, are reading 1.8V each.
Q1651 is so small, I had a had time testing it, and IC1680 doesn't seem to exist, it's not on the board, and the manual never references it again.
Since I'm getting all these low readings, I'm thinking there may be something wrong with the PSU board, but I don't see any bad caps or anything like that on it. What do you guys think? Thanks for helping me out.
Using a flashlight, the screen appears to still be on. But the back light is definitely off. It will stay on until it's turned off, so the cpu isn't turning the whole set off, just the screen and/or backlight.
I found the service manual online, you can download it here:
http://www.electronica-pt.com/esquem...7819-00-25116/
I'm getting low voltage readings on several chips. Pin 48 on IC800 is reading 2.6V. On IC1670 Pin 1, the input, is giving me 14.1V and Pin 2, the output, is giving me 8.6V. And on IC 1630, Pin 1, input, is reading 2.3V, and Pins 3 and 6, outputs, are reading 1.8V each.
Q1651 is so small, I had a had time testing it, and IC1680 doesn't seem to exist, it's not on the board, and the manual never references it again.
Since I'm getting all these low readings, I'm thinking there may be something wrong with the PSU board, but I don't see any bad caps or anything like that on it. What do you guys think? Thanks for helping me out.