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Hi our tv set need to be serviced. Here are some tips: 1. Open main fuse. The fuse is clean but interrupted. You can try replacing it with one o the same value. 2. Fuse Blown or blackened. Short in the rectifier bridge or in the switching transistor. Out of the power supply: supply line rectifier (100/150V) shorted.
If no standby light is on (red), maybe a blown fuse that can be replaced with a new one of the same value. If the blown fuse is blackened, some componet is bad inside the power supply. If the fuse replacement does no result, the problem may be in the power supply (IC power supply switching controller, switching transistor, startup resistor or even an overload in the supply line output) which requires a technician to fix it.
what you can do is trouble shooting of the tv unit. first place to be check will be the powers supply section check weather the primary fuse get blown. if ok check the regulator and the bridge type diode which shorted. if all good, next will be the horizontal output transistor or an open resistance going to the b+ of the flyback transformer.
Open the television and follow the power cord to the main power supply board the fuse will be near this cords contact plug check for blown 5amp fuse, if fuse is not blown then power supply took a shock and needs repair.
This could be caused by several things, the fuse in the plug or the internal fuse in the TV might have blown, if so this could have been caused by an electrical which means once replaced should be ok. However there is the probablity that a short circuit in the power supply has caused this. You will need to use a multi-meter & check if you have an incoming voltage from the mains & then through the on/off switch. If so, check what voltage supplies you are getting from the power supply. It is possible a supply resistor is open circuit or a semi-conductor component is at fault such as a transistor or diode. You need to extremely careful when checking power supplies as some components can hold a high voltage charge. If you do not feel confident to do this then I advise having a service engineer to have a look at it.
This could be a problem with the power supply. Yes there is a fuse on the power supply & if you have a multi-meter & are competent with electrical safety, you could test it. However, if it has blown then almost certainly something else will have caused it. You might have a short circuit bridge rectifier or faulty chopper transistor. If the fuse is ok, then you will need to check voltages from the power supply to find out what feeds you have. There may be a start resistor open circuit for example. If most of the start up voltages are ok, then you need to look at the line output stage & check if this circuit is getting any voltage supply.
A blown fuse is usually caused by a shorted regulator or a bridge rectifier circuit. Either way it is a problem in the primary power supply.
A bad cord won't blow the fuse in the set, it will blow a circuit breaker in the house.
A servicer usually would normally cover the inside of the set with a "few light slits in the AC cord".
Hope this helps
Was this the 220 ohm in the power supply??? and if the 5 amp blew right away then it probably took out the bridge rectifyer with the power surge that comes alog with hurricane damage to the power lines as I used to live in florida and repaired lots of sets damaged from storms!! After you check the bridge rectifyers I would start looking to find any other shorts. First measure across the ac line with the fuse replaced but not plugedf in . If its shorted check what I mentioned before if its good after you replace the shorted parts you maybe in luck. need more assistance go to sams photo facts download a schematic and we will trouble shoot this together if you post it here so i can look at it. good luck