braindrain
Moderator
Posts: 30
Join date: 2009-08-02
Age: 28
Location: manila davao city
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 Subject: T.V repair tips Sun Aug 02, 2009 1:35 pm |
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Problem: kung ang VHF walang channel at ang UHF ay may channel
walang duda ang sira ay T.V Tuner... T.V Tuner must be replace...
Problem: kung ang T.V ay may ruster picture only at medyo malabo at ang sound ok for all channel try to check T.V tuner or adjust the trimmer of FBT... 
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Mecaniko
Webmaster/Admin
Posts: 153
Join date: 2009-04-04
Age: 36
Location: Jordan
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| Subject: Re: T.V repair tips Tue Aug 04, 2009 10:59 pm |
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good job master...keep sharing your knowlegde...marami kang matulongan...
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braindrain
Moderator
Posts: 30
Join date: 2009-08-02
Age: 28
Location: manila davao city
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| Subject: Re: T.V repair tips Wed Aug 05, 2009 6:41 pm |
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Sony TV Model: KV2565
Dead with H. output short circuit, replacement blows short again
First check power area and repair dry joints then change all high voltage (PF value) capacitors in the horizontal section, this fixed the problem...ok..
Panasonic TV Model: CT20G12V
Problem: Dead
try to check STR58041 chip... 
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Osman83
Posts: 3
Join date: 2011-12-24
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| Subject: Re: T.V repair tips Fri Dec 30, 2011 2:25 pm |
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The other day my old 16" CRT television died, and was wondering if anyone has repair tips for common / easy-to-find failures.
At the time it was hooked up to an old Sinclair ZX81 homecomputer, running a demo that did some funky things with the sync signals. I suspect that helped push this 10 year old TV over the edge - suddenly it said 'poof' and no image since... (black screen) But it might have been coincidence - this TV has seen countless work hours.
When powered on, I can hear a ticking sound (roughly once/second), and the standby/power LED flashes in same rhythm. But no sparks visible or anything like that.
I inspected insides carefully, there's no obvious burned parts, nothing smelling bad/melted, no blackened spots on circuit board, electrolytic capacitors all look fine. In fact, for a 10 year old TV the insides look relatively 'clean'... There's 1 main fuse, it's still okay. I can do some basic checks, like: low voltage supplies, spotted an NTC somewhere that looks like it's used as a fuse, bad solder contacts etc, but that's about it. Have only multimeter, no access to scope unfortunately. Also I have schematic (on paper), don't know if that's online anywhere.
I don't plan to invest much time/money into it as these things are considered near-worthless these days - people put them on roadside (still working sometimes), or free to pick up. It's just that right now an old CRT television is enough to cover my needs, and I don't like tossing 10+ kg. equipment if a $0,50 component replacement could fix it.
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