Hi All,
The set is not responding to the remote or power push button. Red led remains on with no activity or clicking of relay.
I have checked the POWER_ON signal at pin 2 of P201 of the power supply but it remains Low all the time despite activating the power push button repeatedly.
To confirm that the Microcontoller is indeed receiving the signal from the power pushbotton, the voltage at Pin 240 KEY1 changes from 3.35V to 0.18V when the power push buttom is activated.
I went on to check Pin 229 RL_ON of the Microcontroller which provides the POWER_ON signal to the power supply but there were no activity when the power push button is activated.
All my findings tells me that the mainboard maybe faulty but I cannot be sure until I have done further measurements with a scope which I have back ordered and is due to arrive anytime.
My next course of action would be to:
-Measure the crystal of the Microcontroller to ensure operation.
-Reflow the fine pitch Microcontroller with soldering iron and lots of flux.Yes I have an oven but I will get divorced if I bake the board in the oven
Any other suggestions or ideas ?
Thanks.
The set is not responding to the remote or power push button. Red led remains on with no activity or clicking of relay.
I have checked the POWER_ON signal at pin 2 of P201 of the power supply but it remains Low all the time despite activating the power push button repeatedly.
To confirm that the Microcontoller is indeed receiving the signal from the power pushbotton, the voltage at Pin 240 KEY1 changes from 3.35V to 0.18V when the power push buttom is activated.
I went on to check Pin 229 RL_ON of the Microcontroller which provides the POWER_ON signal to the power supply but there were no activity when the power push button is activated.
All my findings tells me that the mainboard maybe faulty but I cannot be sure until I have done further measurements with a scope which I have back ordered and is due to arrive anytime.
My next course of action would be to:
-Measure the crystal of the Microcontroller to ensure operation.
-Reflow the fine pitch Microcontroller with soldering iron and lots of flux.Yes I have an oven but I will get divorced if I bake the board in the oven
Any other suggestions or ideas ?
Thanks.
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