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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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SONY TV Horizontal Problem
I have a SONY KV-27V26 made in 1997, and it went dead last night. When it
starts the FBT makes a "tzk" noise for a half a second, and then stops. No visible spark can be seen around the FBT, not even in the complete darkness. The noise seems to be louder than normal operation (?), like a continuos spark, but not sure. Then the power led keeps flashing every second or so. Is this a short iside the flyback transformer, and is stoped by protection? Or is it a short somewhere on the high voltage? I have a background in electronics, but not too much experience in TV repair. Any help is much appreciated. I can be also reached at icsaki (at) hotmail.com Thanks, Istvan |
#2
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SONY TV Horizontal Problem
Best sugestion with your Sony is to take it to an authorized Sony Service
Facility. They will have the necessary tools to diagnose the problem be it the LOPT or other area. "Isi" wrote in message ... I have a SONY KV-27V26 made in 1997, and it went dead last night. When it starts the FBT makes a "tzk" noise for a half a second, and then stops. No visible spark can be seen around the FBT, not even in the complete darkness. The noise seems to be louder than normal operation (?), like a continuos spark, but not sure. Then the power led keeps flashing every second or so. Is this a short iside the flyback transformer, and is stoped by protection? Or is it a short somewhere on the high voltage? I have a background in electronics, but not too much experience in TV repair. Any help is much appreciated. I can be also reached at icsaki (at) hotmail.com Thanks, Istvan |
#3
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SONY TV Horizontal Problem...... ART
Hey man this is a place where some people want to try possible easy
repairs the only thing you post is ``take it to the shop`` well DUH everyone knows that . Some people are tired of shops charging 200$ to replace a 2$ part in 15 minutes |
#4
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SONY TV Horizontal Problem...... ART
Nice Kenny: Presume that he actually does have the equipment and knowledge
as to what he would be looking for?? Then he would have indicated that fact in the materials of the original post, inclusive of diagnostic results. Rather than having him totally FUBAR the set and maybe hurt himself IMHO it would be better to have a "professional" check it out. Maybe it is just lousy solder connections at the h-drive or LOPT. Safety reasons and professional courtesy inluded. "Ken G." wrote in message ... Hey man this is a place where some people want to try possible easy repairs the only thing you post is ``take it to the shop`` well DUH everyone knows that . Some people are tired of shops charging 200$ to replace a 2$ part in 15 minutes |
#5
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SONY TV Horizontal Problem...... ART
"Ken G." wrote in message ... Hey man this is a place where some people want to try possible easy repairs the only thing you post is ``take it to the shop`` well DUH everyone knows that . Some people are tired of shops charging 200$ to replace a 2$ part in 15 minutes Hey, watch it. I never charge more than $180 for the 15 minute jobs. -- Leonard Caillouet ....I'd like to find you inner child and kick its little ass. Get over it... (The Eagles) |
#6
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SONY TV Horizontal Problem...... ART
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#7
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SONY TV Horizontal Problem...... ART
Hi Art,
I am an electrical engineer, and I repaired TVs occasionally in the early ninties. So I won't hurt myself. I also got the schematic today, and I'm confortable with the soldering iron and wick. So the PS seems to be OK, I measured the 135V on pin 2 of the FBT. The HOT is also OK, since it starts up for a half a second, or so. I assume it goes into protection mode after the short startup. There are no visible signs of a bad solder joint arount the FBT (I checked with a magnifier glass). What next? I also noticed the FBT on the original schematic is 1-453-207-11 and the one in the set is 8-598-969-00. I really appreciate your support. Istvan "Art" wrote in message news Nice Kenny: Presume that he actually does have the equipment and knowledge as to what he would be looking for?? Then he would have indicated that fact in the materials of the original post, inclusive of diagnostic results. Rather than having him totally FUBAR the set and maybe hurt himself IMHO it would be better to have a "professional" check it out. Maybe it is just lousy solder connections at the h-drive or LOPT. Safety reasons and professional courtesy inluded. "Ken G." wrote in message ... Hey man this is a place where some people want to try possible easy repairs the only thing you post is ``take it to the shop`` well DUH everyone knows that . Some people are tired of shops charging 200$ to replace a 2$ part in 15 minutes |
#8
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SONY TV Horizontal Problem...... ART
snipped:
"Isi" wrote in message I also noticed the FBT on the original schematic is 1-453-207-11 and the one in the set is 8-598-969-00. Istvan ----------------------------------- Damn....... this is not the first time that I have heard that some ******* in the middle of the night took the back off of your television and switched out your original equipment FBT and put in an improper replacement. Probably some tech from a high priced shop that Ken G is always talking about trying to obtain some free parts. |
#9
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SONY TV Horizontal Problem...... ART
Some repairmen like to make a decent living. We flat rate our labor, and it
averages out. $200 is not reasonable labor for a shop repair unless the shop had to pick up and deliver the unit. $55 to 65 is reasonable if you fix the unit, and in home is worth much more as you have to lug all the equipment with you and work in bad conditions with the screaming kids, barking dogs, bad light, people breathing over your neck while you're trying to fix their set, etc. When a shop fixes any problem in 15 minutes that means the tech is good. You are paying for experience when you see that. What about the first time the guy saw that problem and spent days trying to fix it with inadequate support from the mfr? What you don't seem to consider is the first time the repairman saw that problem he probably lost his a$$ fixing it, also you fail to consider training for each new model year, required subscriptions to manuals, Insurance required by manufacturers to be an authorized servicer, (usually $1,000,000 coverage or more) and the other things like paying employees, in other words when john q. backyard tvguy fixes a set in the garage he doesn't have any OVERHEAD. It doesn't cost him to maintain a shop, and if he does a bad job and the unit catches on fire and burns down your house you can bet he doesn't have insurance that will cover it, but an authorized servicer DOES because you can't get authorized without it. I've been professionaly repairing electronics for ASC's for 14+ years and I know my experience is worth what I charge. /rant -- Jammy Harbin J & J Electronics, Inc. 227 S. 4th St. Selmer, TN 38375 731-645-3311 "Ken G." wrote in message ... Hey man this is a place where some people want to try possible easy repairs the only thing you post is ``take it to the shop`` well DUH everyone knows that . Some people are tired of shops charging 200$ to replace a 2$ part in 15 minutes |
#10
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SONY TV Horizontal Problem...... ART
Sounds like it time for Ken G to retire before he goes bust. jmt kip |
#11
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SONY TV Horizontal Problem...... ART
Seen way too many SONY Teles with poor solder connections at the horiz
driver and LOPT transfformesr, and, ocassionally the same problem at the SMPS transformer. The repairs that we have done that tend to repair many of these sets is to physically remove both the Driver and Flyback transformers, clean all the old materials from the pads and leads, and reinstall the items. BTW using a good ringer on the flyback when out of the circuit is a prudent move. Also to check the driver transistor, horiz output transistor, and associated components including caps, resistors, and coils. A good mag glass or mag lamp will assist in locating questionable connections. "john" wrote in message .. . Sounds like it time for Ken G to retire before he goes bust. jmt kip |
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