Problem with 20" philips magnavox

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
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Hello
You are talking about the horizontal output transistor damage I assumes and post this solution. If LOT has internal winding short, the horizontal output transistor will get shorted. It will be best to replace the horizontal output transistor, alongwith the LOT

the tv have a fault in the power supply circuit or horizontal circuit check the regulator transistor or ic in your power supply and other components there.check the horizontal output transistor in the horizontal circuit and other components around replace what ever component you find faulty and components associated with the faulty component.good luck.

Your TV has an overload due to some faulty components inside it. This type of fault is usually noted with overheating of horizontal output transistor connected to LOT of the TV. This may be due to LOT fault, or fault to the transistor itself. When it overheats, it put a short between supply rail, and the power supply regulator system inside your TV will detect that short and will shut down automaticaly. Please note; if the TV works after some time, say after 15 or 20 minutes; and again shuts down after working for a short period, and the cycle repeats, surely there is a winding short inside LOT, which cannot be detected by normal multimeter measurments. If it is so, replace LOT and the horizontal output transistor at the same time.

Video output section of your tv is in trouble. Either it not gets proper voltage [low voltage if voltage is there]; or video output Ic or transistors whichever used may got damaged. Never switch on the tv in this condition; that picture tube may get damaged. Get it repaired soon.

Check the diodes,...hope this helps...

Hi

as you said.. you have defective horizontal output transistor! and or the power section, please check the power regulator first. this is repairable..

Thanks!

hi first of all u should check ur transistor connections.Check your Horizontal and vertical output transistors.You should also check the horizontal and vertical yoke connections as well as your low voltage regulators.... if any of these got damaged u should purchase a new one.. but try to purchase with the help of a tv service assistant...
thank u!!!
rate me

check the horizontal output transistor or the vertical IC,maybe one of them is defected .

Hello sidley,

The problem you described might be "blooming" This happens due to poor HV (High Voltage) regulation. The problem might be with the High Voltage Transformer and or the Horizontal Output Transistor.
The problem might also be related to the associated circuitry of the two components.

I hope this helps
Thank you,
Shuttle83