Hello...have a circa 1994/1995 Pioneer Rear Projection, SD-P5575 television. Recently, the PICTURE has become suseptible to loud sound or bumps to the TV. When either of these events happen (usually it's the bass from a movie/TV show I'm watching), the sides of the screen begin to collapse in, there is an audible buzzing noise (while the screen is collapsing), and then the screen jumps back to normal.
The problem is intermittent, ie: sometimes the same part of the movie (the same loud sounds) don't effect the screen. I'm suspecting a bad solder joint somewhere, but have NO CLUE where to begin looking. Strangely enough, I've never replaced ANY of the bulbs since I bought the TV (new). I don't suppose I could get fortunate enough that it could be one of the bulbs going out? Also, regardless of that answer, what should I be looking for to know if the bulbs (or a bulb) need to be replaced??
Please feel free to post here as I would like to have this information available to others, however, if you would like, please CC a copy to my email address as well?
I thank you in advance for any assistance you can offer.
Regards,
Michael Compton
Id forgotten...another HUGE problem...and this one really confuses me...I typically watch movies via my DVR though Input 1. I have the problem as listed in the above post. Input 2 and 3 seem to react similarly as well...HOWEVER, and this is the part I don't get at all...when I view through the coax input (the cable from the wall), I typically don't get any picture AT ALL...it's a black screen, but, occasionally, the picture will come in, but almost like a bad signal (kind of scratchy picture), and it cuts in and out back to the black screen (no sound, like it's not getting a signal). It had been (a few months ago) that if you left it on that input for awhile, it would eventually come in and get a little better and better the longer you'd leave it on that input...however, now, it takes FOREVER (easily an hour) before you get it to pull any picture/signal, and even then it cuts out more frequently if it even stays up at all. But, you can jump back to one of the inputs and the picture is perfect (except for the intermittent problem of the screen shrinking in on itself from the loud noises (occasionally)).
Why do I think it may just be time to get rid of this TV as the repair will be more than it's worth or could be replaced for!??! ;-(
DEFIANTone, I'm very falmilare with that Pioneer set. Great TV! I love the model with the rosewood finish.. Just so you know, there is no bulb inside this tV set. There are three picture tubes. I have also seen your problem bud. If you have had no solid state repair experience, I recommend that you call in an experienced tech to assist you with this problem. your problem is in the horizontal sweep circuit. its a cold solder connection on a componet, most likly a resistor or a stand up coil. The longer you wait, the more it will cost you, as it will burn the board, and or a componet. Right now its just a simple solder connection. The problem with the coax input is most likly the tuner, tuner control PLL circuit, or a power supply capacitor supplying the b+ to the tuniner or the tuner circuit. Should not cost you much to have repaired by a trained tech. Good Luck, and please keep us informed of the progress of this repair.
Larry, Thank you again for the information...I am looking for a repair center now. To verify though...the two problems are unrelated, correct? If I go back and think on this more, I think the tuner issue came up first...and the the issue you've identified as the horizontal sweep circuit, cold solder connection issue started up a little later. Again, it sounds as though they are similar problems, but unrelated?
I think one of the problems I have that has exacerbated the problem, probably caused it, is that I have a home entertainment system with two subs in close proximity to the TV, and I'm not shy about getting the roars of the crowd going with the surround. From some of the posts I've seen today, it appears that Pioneer sets had chronic problems with bad solder joints (????), so, I'm thinking I may revisit this problem again in the future if I don't move my subs...
On last thing...you'd mentioned the power supply capacitor supplying the b+ to the tuner, and since you've brought in the power supply, any chance that a power supply problem could be causing BOTH issues???
On those picture tubes...now you have me a little more curious. So, this units picture comes from tubes...which typically you odn't replace over the course of the life of the TV? Like a normal TV...if the tube goes out, you get a new TV, you don't generally replace the tube. The difference here is there are THREE tubes (the different colors), and, if they go...the TV goes, correct? And on that same note, what about aligning the them (the convergence)? I've adjusted it as much as you can through the on-screen menus, but, there still seems to be a blue "trace line" that usually is very visable if you're watching somethere where say, the background is light (or white) and the person in the foreground is against that white background, there appears to be a blue line out lining them (usually only on one side or the other). I'm assuming this has somethign to do with the convergence. Again, as this unit has NEVER been in for any service, and moved three times (from location to location) over the 12 years, does it sound like the guns need to be aligned?
Thanks again and will let you know what I find out from TECH once it's in. Oh, you didn't address the question of whether or not you felt this was a problem that could be dealt with on-site. Obviously, I'd prefer to have the unit fixed here rather than carting it out and I would like you're opinion as opposed to the TECH which is oging to probably tell me whatever gets more billing...
Thanks again, Larry, I appreciate your time on this...
Michael
Larry...on the issue with the Tuner...would you say that replacing the tuner would probably negate fixing the unit...that at that point replacing the TV would make more fiscal sense?
Michael
A tuner , if that is the problem will cost you about 350 to 400 bucks. I doubt if your sub caused the problem, as I said I have seen alot of these bad solder connections in the sweep as well as the power supply. I also doubt if the tech will resolder something in the house, although when I worked for a bifg dealer in NY, Called PC Richards & Sons, when I was the feild service man for projection TV's In the 4 years I was there, I only had 3 sets pulled to the shop. The biggest reason for that was that they had mostly service contracts on stuff they sold, so if I could fix it in the house it did not cost them as much. I had like a shop on wheels. I fixed almost every and any problem on a TV set, including replacing all three tubes in the home for the customers. But you see these days TV peeps want to make the max. money, as someone would not pay a service person, 500 bucks for 2 hours worth of work, if they did it in the home. Thats just the way it is, and if any tech says differant, they are full of it because I've done anything and any type of repair in the home.