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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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20" Mitsubishi tv model:CS-20SX1
20" Mitsubishi stereo (with audio ouput jacks)tv
model:CS-20SX1,year:Aug 1992.Originally the tv would shut off once a week then once a day then every few hours now the tv shuts off 2 seconds after turn on.There is hv during those two seconds but no raster and the flyback seems to make a slightly different noise,I don't have a flyback tester so I will try to use the technique at: http://www.iwaynet.net/~nesda/flypoor.html and by removing the HOT transistor and placing a 100 watt lamp between collector pin and ground and see if the power supply is fine. I would like to know what the culprit would be,also a this tv had the following parts replaced by another repair shop a week ago: C909 C908 C515=3300 Uf,16V C516=3.3 Uf,25V R531=470 ohms,2W Also I would like to know the generic,Mitsusbishi and other OEM part #'s for IC3A3 which is a 10 pin audio IC taken by the prior repair shop. To familiarize you with this chassis it uses the following parts: Flyback # 334P21001 (location: T551),Asti Magnetics # 2944 http://www.astimag.com Yoke # 330P15203 Q503=2SD1879 IC401=LA7837 Thanks in advance Sidney Dartmouth,Nova Scotia |
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20" Mitsubishi tv model:CS-20SX1
These caps are all common failures.....best to just replace them
Check C519 100 Ufd 50 V (105c) Off The Collector Of Q507 On The Main Pcb. Check C517 1 Ufd 50 V (105c) Between Base And Emitter Of Q506 On The Main Pcb Check C520 1 Ufd 50 V Between Base And Emitter Of Q505. Check C518 33 Uf 50v. It Is Across C-E Of Q506, X-Ray Protect Circuit. C518 Is 33 Uf 50v. It Is Across C-E Of Q506, X-Ray Protect Circuit.MITSUBISHI CS20SX1 ================================================== ========= Shuts Down Or Intermittent Start Up. Would Have To Unplug To Start Again Samtronix - Sam Jalal Problem Was In The X-Ray Protection Circuit Found C523 Located Under The Pc Board Was Open Also Found C519 Leaky And Replaced C518 And C515 --------------------------------------------------------------- -- ========================== Jeff Stielau Shoreline Electronics Repair 344 East Main Street Clinton,CT 06413 860-399-1861 860-664-3535 (fax) ========================== "If you push something hard enough it will fall over." Fudd's First Law of Opposition - Sir Sidney Fudd "Sidney" wrote in message om... 20" Mitsubishi stereo (with audio ouput jacks)tv model:CS-20SX1,year:Aug 1992.Originally the tv would shut off once a week then once a day then every few hours now the tv shuts off 2 seconds after turn on.There is hv during those two seconds but no raster and the flyback seems to make a slightly different noise,I don't have a flyback tester so I will try to use the technique at: http://www.iwaynet.net/~nesda/flypoor.html and by removing the HOT transistor and placing a 100 watt lamp between collector pin and ground and see if the power supply is fine. I would like to know what the culprit would be,also a this tv had the following parts replaced by another repair shop a week ago: C909 C908 C515=3300 Uf,16V C516=3.3 Uf,25V R531=470 ohms,2W Also I would like to know the generic,Mitsusbishi and other OEM part #'s for IC3A3 which is a 10 pin audio IC taken by the prior repair shop. To familiarize you with this chassis it uses the following parts: Flyback # 334P21001 (location: T551),Asti Magnetics # 2944 http://www.astimag.com Yoke # 330P15203 Q503=2SD1879 IC401=LA7837 Thanks in advance Sidney Dartmouth,Nova Scotia |
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