hey guys this may be a simple question but i have searched the internet and this site and i have not found the answer i was looking for. i just recieved a toshiba tp48e51 projection tv. tv is in amazing shape but i got it because a buddy was moving and the red color doesnt work. i popped open the front panel and you can see the 3 color (guns?) and the red doesnt come on at all. the blue and green seem to work fine. when you go to set the convergence red doesnt show up at all. i saw on the red tube, bulb or gun (whichever you call it) had the number TDY707AS (r) on it. not sure if this is the part number or not. (couldnt get much on searches for that number.) if anyone could let me know how to find the part and whether or not its easy to swap out that was be great. thanks so much!
How much repair or circuit board experience do you have my friend? If you think you can handle a simple test without hurting or seriously shocking yourself, as there is alot of high voltage in this set, even when it is unplugged. Let me know and we can check the tube and see if it is good or if there is a red drive circuit problem
wow i dont have much experience but im not stupid and i know to stay away from coils and power boxes....im pretty good at figuring things out myself but i do have a a buddy who graduated with and electrial engineering degree that could help...i just want to know if i can get the part...and id probably be more than happy with a local repairman house call to fix it...i just want to know prices/worth it values....thanks
Ok the first thing you want to do is locate the red or bad tube. Next with the set unplugged, gently pull off the red crt board off of the CRT. Next, right next to the red tube is the green tube. Pull off that crt board as well. Now doing your best not to pull off any wires, switch the two boards around and install the two crt boards on the opposit tubes. Now turn on the set. Is the red tube still out or is the red on and the green tube is out? If the green tube is out now, That means that the problenm is not so serious and you have a red drive problem, most likely, a red CRT driver board problem. Now if the green comes on and the red tube is still out, you have a bad red CRT. You can decide if you want to proceed from there. The CRT assembly is $271.00 + shipping. You can go HERE to see the tube cost and the part number as you requested. Good Luck with this repair, and let us know please how this repair turns out for you.
alright i took the red drive off and moved it over to the middle crt and it didnt work there either so im hoping it is only a drive problem. i couldnt move another drive to the red because it wouldnt reach being that the red is all the way on the left. replacing a drive looks easy enough...there is only one wire to solder that i can see. what do you think?
btw thanks for all your help and taking the time out of your day. :D
no problem, thats a good sign! If the green would not come on. Now next thing would be to look for a small square with six controls on them. Three on the top row and three on the bottom row. One row will say focus, and one row will say screen. With the set on, locate the screen controls and locate the rd one and yurn it up clockwish a little bit. if the red still did not come on, then the drive board is bad most likely or there is a problem in nthe RGB. You could most likely use the blue drive board by disconnecting it from the blue and installing it into the red circuit. If this does not work there will need to be deeper circuit diagnoises. If the red does work, go to http://www.ptscorp.com, and find the phone number and see if they repair these types of driv boards. Good Luck
well i turned up the red and if i barely touch it these red lines go across the screen...they arent straight lines but if i turn it up just a little i get some red...enough that i can watch it without being too bothered...i would like to get it fixed but i can deal with this for now...any other suggestions or did i do all that im capable of? thanks larry
Doi like I said, swap the blue board for the red, this way you will know for sure if it is only the red drive board or the RGB driver circuit.