I've realised how little I know about electronics and would like to learn.
I was recently given a Teac AG980 tuner amp that goes into standby but won't light the front panel display or produce any sound.
I have downloaded the service manual but am struggling to follow anything.
Using a multimeter I find 4V ac in standby and 40V ac on pressing the standby switch on pretty much every component around the board.
Should I be able to find anything much with a multimeter or do I need an oscilloscope.
I'm thinking it's a push-pull amp, with the negative part of the sine wave fed by half of the board and the positive part by the other half. I wouldn't see the components of the sine wave with a multimeter, would I?
I've looked around the board and nothing seems corroded, burnt, blown or physically defective.
There are 2 transformers which both test OK on resistance and input and output voltages.
How can I learn mere, please?
I was recently given a Teac AG980 tuner amp that goes into standby but won't light the front panel display or produce any sound.
I have downloaded the service manual but am struggling to follow anything.
Using a multimeter I find 4V ac in standby and 40V ac on pressing the standby switch on pretty much every component around the board.
Should I be able to find anything much with a multimeter or do I need an oscilloscope.
I'm thinking it's a push-pull amp, with the negative part of the sine wave fed by half of the board and the positive part by the other half. I wouldn't see the components of the sine wave with a multimeter, would I?
I've looked around the board and nothing seems corroded, burnt, blown or physically defective.
There are 2 transformers which both test OK on resistance and input and output voltages.
How can I learn mere, please?