kneedeepinit
- Nov 24, 2013
- 3
- Joined
- Nov 24, 2013
- Messages
- 3
I purchased a Sansui G 5500 which was not working. I bought it for the face plate and cabinet for another working unit. I would like to get it functional.
On the Power Amplifier Circuit Board, there is a completely burnt resistor ( R46) which has also surface burned the two neighboring resistors. My understanding of resistors is that they rarely fail, something causes them to fail.
Looking at the schematic, Transistor TR20 is right next to it. The middle leg of the transistor is directly connected to the burned resistor. Transistor failure seems to be far more common. Should I be looking for something else that cause the bad transistor or just replace it?
My question is - should I just replace the transistor while replacing the resistor? Should I replace the neighboring resistors that look bad but may not have internal damage?
The transistor part number is 2sa992 and they seem pretty cheap on ebay. I am hoping my local electronic shop has them.
On the Power Amplifier Circuit Board, there is a completely burnt resistor ( R46) which has also surface burned the two neighboring resistors. My understanding of resistors is that they rarely fail, something causes them to fail.
Looking at the schematic, Transistor TR20 is right next to it. The middle leg of the transistor is directly connected to the burned resistor. Transistor failure seems to be far more common. Should I be looking for something else that cause the bad transistor or just replace it?
My question is - should I just replace the transistor while replacing the resistor? Should I replace the neighboring resistors that look bad but may not have internal damage?
The transistor part number is 2sa992 and they seem pretty cheap on ebay. I am hoping my local electronic shop has them.