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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
25f-m120

 
 


jim47
New User

Jun 21, 2006, 9:27 PM

Post #1 of 7 (1357 views)
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25f-m120 Can't Post
Sharp:Blows fuse, Customer wants fixed cheap.Any ideas? I havent started yet, but with ohms,diodes and (resistor) seem ok. Anybody have some Ideas?
Small Time TV-Repair



mel
Veteran

Jun 21, 2006, 9:58 PM

Post #2 of 7 (1352 views)
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Re: [jim47] 25f-m120 [In reply to] Can't Post
HOT shorted?


jim47
New User

Jun 24, 2006, 3:47 PM

Post #3 of 7 (1341 views)
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Re: [mel] 25f-m120 [In reply to] Can't Post
mel, I dont have a schematic on this, But I changed the hot-transistor. No luck! Have set on 100 w light bulb. I get raster no sound. Light bulb is dim and steady.I found d751 by the Ic 702, seems bad. Could I be in the right area? Thanks again.
Small Time TV-Repair


jim47
New User

Jun 24, 2006, 7:35 PM

Post #4 of 7 (1335 views)
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Re: [jim47] 25f-m120 [In reply to] Can't Post
In Reply To
mel, I dont have a schematic on this, But I changed the hot-transistor. No luck! Have set on 100 w light bulb. I get raster no sound. Light bulb is dim and steady.I found d751 by the Ic 702, seems bad. Could I be in the right area? Thanks again.
Small Time TV-Repair


jim47
New User

Jun 24, 2006, 7:53 PM

Post #5 of 7 (1327 views)
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Re: [mel] 25f-m120 [In reply to] Can't Post
Mel, Are you saying that the flyback is bad? Not to good on computer messages. Newby on computer.
Small Time TV-Repair


mel
Veteran

Jun 25, 2006, 9:43 PM

Post #6 of 7 (1308 views)
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Re: [jim47] 25f-m120 [In reply to] Can't Post
If you have raster, the problem is not in the high voltage circuit but probably in the secondary power supply. I don't have a schematic for that specific model but if the suspect diode supplies B+ to the video/audio section, it is probably the culprit. You can always go to www.samswebsite.com and download the schematic for that set.


jim47
New User

Jun 29, 2006, 9:40 PM

Post #7 of 7 (1292 views)
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Re: [mel] 25f-m120 [In reply to] Can't Post
Hi tech`s. I do this partime only, But I have 25 years in it.Tv repair is my future. Not hooked with sams yet. But will be in the near future. Thanks Mell, for your time.I can get my schematics thru. A dealer nearby. He rents them to me. But with the price of gas, seems like sams will be my best option. May your repairs be many.Cool
Small Time TV-Repair

 
 
 


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