NAD 216 red protection problem

[Audio Service]

Great to hear you have repaired your Amplifier.

[Ben99]

First, say Thanks this is a great forum. thanks, Sqeek, Ylli, Audio service, and everyone for the post.
I have a NAD214 of the amplifier. My amplifier had the same problem. The amplifier was in protection. I knew the model close to Nad216, just different the output power. I study all the feedback about check the amplifier's Led red in protection. I test
IC202(TA7317P)
Pin1 0.68-0.69V
Pin 2 0 V
Pin 3 0V
Pin 5 0.78V
Pin 6 50 V ( the relay turn on or off, I don't know)
Pin 7 0.04V
Pin 8 0.38V
Pin 9 0.44V

Compare the TA7317P data
Pin 8 and Pin 9 have a problem. the normal voltage is Pin 8, 8V, and Pin 9, 3.1V.

Test:
D213 15V
D214 15V
R244 -55V
R243 55V

Based on previous the post mentioned the Pin 8 OF IC202 that offers the protection signal.

I thought the relay or TA7317P was broken. I purchase the parts after I wish I can find out the problem. I am not an Electrical Engineer。
/Users/foxben/Downloads/IMG_2511.HEIC
/Users/foxben/Downloads/IMG_2512.HEIC

[Vrystaat]

I had a problem with a 214 with intermittent problems. I turned out to be the tarnished connectors between the Power board and one of the amp boards. My amp had plugs that made bad contact. Some people remove the plugs and solder the ribbon cable directly to the amp boards. Maybe it your problem as well.

[Ben99]

thank you for your response. I have been pulled out the plug and put it in several times, and tested the signal with the L-channel and R-channel. I am sure not the plugs problem.

[AllenB]

Ben99, your posts are currently under moderation as you are a new member. There is no need to post multiple times, it will just take a little time for them to show up.