Electronics Help Care electronics circuit diagram
how to repair amplifier circuit
it’s very easy to repair the transistor amplifier circuit. every board has a driver section and main transistors. when the board has a problem then we have to repair it. for this, we have to check the main transistor first. then the driver transistors. here we can see the main transistors and the driver transistor in the picture
there are many transistors. If we have problems, we must check the main transistors first 2sc5200 and 2sa1943. then the drivers.
after checking the driver then we have to check another transistor. if all ok then the ziner diodes.
This circuit doesn’t have speaker protection. here, we need a speaker protection circuit. here is the link to get the speaker protection circuit. Diagram is here
This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. if the amplifier has any problem then this circuit can save our soundbox. Normally when the transistor makes a short circuit the voltage comes out from the speaker output line then this circuit protects that voltage. This circuit should not allow any direct voltage to be sent to the speaker. This circuit is essential for protecting the speaker.
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