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This set has a pair of common issues----one: the fuse (6.3 amp and special--do not replace with Radio Shack or generic fuse) blows for no reason---with back off follow power cord (unplugged please) direct to the fuse which snaps into a holder--if stand of wire inside is broken or black replace the fuse with (not generic cheap fuse) correct fuse.
A few of these sets had problems with the degaussing circuit but that is rare----9 out of 10 times replacing the blown or open fuse with the CORRECT one returns set to operation.
I stress that as saw one where a guy replaced the fuse 3 times in a row in a few days with a generic one that popped at turn on.
hello! there is a standard procedure for proper replacement of blown fuse: CRT TVs: unplug degaussing coil, replace blown fuse with 2amp fuse and turn on the set. If it works, reconnect degaussing coil, replace the fuse with correct value(5-8) amp, depends on model(see fuse note next to holder). Enjoy the show! If in a process of replacing the blown fuse with 2amp w/o degaussing coil it blows again, forget about the next step. Set need repair. It could be an easy one, replacing 1 or 2 shorted diodes or bridge rectifier, but could be real piece of work if the power supply got "fried". If your knowledge won't go further, than fuse replacement, I'd recommend local TV repair shop. good luck, Alex.
Make sure that you replaced the fuse with exact ratings. Low ampere ratings will not handle current as what the original fuse installed. If still fuse keeps blowing after replacing with the same rating, this is an indication that you have a short on the power supply section. It can't be fixed by replacing the fuse alone. Short usually near the AC line where parts like the following are present.
Power Cord - even very low of chances but still to be check.
Posistor and degaussing - even very low of chances but still to be check.
If you don't have necessary tools and test instruments, and can't do the job yourself, I would advice you to look for a professional to troubleshoot the problem. Don't attempt to work in the power supply if you don
Make sure that you replaced the fuse with exact ratings. Low
ampere ratings will not handle current as what the original fuse installed. If
still fuse keeps blowing after replacing with the same rating, this is an
indication that you have a short on the power supply section. It can't be fixed
by replacing the fuse alone. Short usually near the AC line where parts like
the following are present.
Power Cord - even very low of
chances but still to be check.
Posistor and degaussing - even
very low of chances but still to be check.
If you don't have necessarytools and test instruments, and
can't do the job yourself, I would advice you to look for aprofessionalto troubleshoot the problem. Don't
attempt to work in the power supply if you don't know thesafety precaution.
If the fuse is burnt, the wire inside will be broken or/and the fuse is black, if you have tester measure it for conductivity with ohmmeter. Replace with the same ratings fuse. If the TV doesn't power up other parts could be burnt and need replacement
This is a very simple fix. I bought fuses at Radio Shack and have to replace one every 6 months or so. Just lay the TV on a towel or something on its face. Pull the screws out of the back - all the way around the edge and a couple on the top of the input/output panel. Trace the power cord to where it attaches to the circuit board and next to it you will see the fuse.
Replace fuse, put it back together and it should work.
Check for 5 volts present at pins of EEPROM IC. ( 8 pin-center
front) = no 5 volts = Re-check power supply components such as AC in resistor 2.7 Ohm ?....Or 5 volts ok,then suspect EEPROM corrupted........part # 223957 ( install 8-pin socket,then re-plug in original, if that doesn't clear it, plug in
new part) Use pre-programmed after-market replacement,if you
can get it.....Let me know....T.
When a fuse blows out thats an indication that theres a short in the set and the fuse is installed there to prevent a fire fom happening in the set. unless you know the HI Voltage safty issues with a tv set there are no user serviceable parts inside these sets and these tvs should only be worked on by trained service personel! The problem that occouring here could be a shorted or leaky bridge rectifier, a shorted and or a bad horizontal output transistor as well as the flyback transistor and the trsnsformer, or a bad componet in the power supply.. Good Luck