Here's the scenario. I'm working on a Sanyo DP46840. It was free, minus the cost of repairs... That said, when the power button is pressed, the green LED come on for a few seconds and goes off... I'm working from the service manual I found HERE (PDF DOWNLOAD LINK)
Page 4/5 of the manual deals specifically with this issue, "Power LED turns OFF within 10 sec of Power ON, or LED cycles ON & OFF"
Step one is to check for 5V to "Power_SW" on the Main Bd, during LED ON time. (see TABLE*1.0) Per table 1.0 - Main K8B "pin 1" should be 5V. I'm getting 7.81VDC... The flow chart is either 5V or 0V... The 5V STBY is also showing 7.75VDC... My questions are, would this over voltage indicate an issue with the power board? I've always heard 5-10% over/under is acceptable, but 7+ volts is beyond 5-10%... Should I stop at step 1 and replace the Pwr Bd? Or continue to step two?
Thanks for your time,
Matt
Page 4/5 of the manual deals specifically with this issue, "Power LED turns OFF within 10 sec of Power ON, or LED cycles ON & OFF"
Step one is to check for 5V to "Power_SW" on the Main Bd, during LED ON time. (see TABLE*1.0) Per table 1.0 - Main K8B "pin 1" should be 5V. I'm getting 7.81VDC... The flow chart is either 5V or 0V... The 5V STBY is also showing 7.75VDC... My questions are, would this over voltage indicate an issue with the power board? I've always heard 5-10% over/under is acceptable, but 7+ volts is beyond 5-10%... Should I stop at step 1 and replace the Pwr Bd? Or continue to step two?
Thanks for your time,
Matt
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