When you turn it on it will power up for a few seconds, then kicks off and the red light blinks 2x/sec.
I fixed a Denon 4200W with the same problem which turned out to be shorted transistor on the amp.
All transistors on the the 710 check out.
Service manual is here: https://www.manualslib.com/manual/14...?page=2#manual
On page 99 on the service manual, on the bottom right of the first diagram of the pcb, is a connector that has all of the protection mode feeds on it. I am getting 2.2V on the ampsig_det line.
I am now out of my league as to how to trace whats causing this. If anyone has any experience or can point me to something obvious in the manual, I'd greatly appreciate it. I followed the flow chart on page 79 for protection mode based on the power amp, and everything checks out. The only part I can't verify is the last step that says power it on and check for an idling current.
Thanks for any hints
Alex
I fixed a Denon 4200W with the same problem which turned out to be shorted transistor on the amp.
All transistors on the the 710 check out.
Service manual is here: https://www.manualslib.com/manual/14...?page=2#manual
On page 99 on the service manual, on the bottom right of the first diagram of the pcb, is a connector that has all of the protection mode feeds on it. I am getting 2.2V on the ampsig_det line.
I am now out of my league as to how to trace whats causing this. If anyone has any experience or can point me to something obvious in the manual, I'd greatly appreciate it. I followed the flow chart on page 79 for protection mode based on the power amp, and everything checks out. The only part I can't verify is the last step that says power it on and check for an idling current.
Thanks for any hints
Alex
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