I can't figure out how to detach the 2 mainboards in this 2001 Projection TV. (How do I attach/insert a picture here?) I want to replace Convergence Correction Circuit STK392-110 (lot D2A10) as Blue Drive / Screen is all bowed out and chip has leaked. So I need to take board out and get to some soldering. These 2 main boards are right beside each other. There are 3 board to board connectiors. 2 white ones with levers that seem to pull up on bare wires and a blue one that is in a hard to reach area but looks like there is a lever here to. I need to know how these connectors work so I don't break anything. so am askin 4 help
SOURCE: Low voltage power supply fuses blown
Theres two jumper wires around the convergence ic's that supply the +/-32 volts to them.I found a cold solder joint on one of them.This causes the fuses to blow.Their close to the edge where the two boards meet.
SOURCE: I've replaced the STK392-110s but Red Vertical convergence is still bowed
Hi can you please post if you fix the problem? I have the same set and it just picked up this problem today -- must have come from the same production run as yours!
SOURCE: CONVERGENCE PROBLEM IN TOSHIBA 43H70
Hello Renee, You have a convergence problem, but you are adjusting the wrong system. You need to adjust the convergence rings first ok You need a dot and crosshatch generator to properly set convergence for this set. Connect the generator set the TV to channel 3 and turn on the generator set it to dots adjusting the convergence try to get the center dot RGB all together and then adjust for the outer edges using the convergence board. the use the crosshatch to adjust convergence along the lines of the crosshatch pattern. Remember use the rings first and the the convergence board adjustments.
SOURCE: Panasonic PT47WX49E blue convergence
me too! everything fixed now how do you exit chk mode??
SOURCE: Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852
Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001
Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852
Symptoms January, 2009:
Repairs Made:
Total Cost to Repair about $10
57 views
Usually answered in minutes!
grrr, why can I upload a picture when answering or adding a comment to someone elts's question but not when I ask. This is dumb I think.
Boards dont seperate. They sit on Plastic deck. Just remove 3 screws and deck slides out the back of the TV
Can't believe I havent fixed this for over a year. Anyways... I Desoldered heatsink and STK392-110 Chip pins and will replace. Convergence resistors physically look ok but I will see if I can test 1st. Time to shop for a new STK392-110 Convergence IC Chip
Wow, time flies by. just got an email from fixya. So updating this post. I replaced 1 of the convergence chips a while back and TV has been workingg great as it should. I had an overlay so I did another alighnment. TV is over 10 years now so am happy i guess. was a $3200 TV back in the day but clarity is still better than most. only drawback is she is a heavy beast.
×