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Strange Switching Diode phenomena This is not a Hoax



Strange Switching Diode phenomena This is not a Hoax

Hi one of my customers said he had picked up an Onkyo TX-88 and that the switching diodes were lit up red. I had him send pics and now more confused than ever. I have been on the service bench a long time. I am 66 years old and can not wait to get this in my shop. Here are the pics and if anyone can shed some light on this. {no pun intended } please post a reply.




Comments

Re: Strange Switching Diode phenomena This is not a Hoax

These are actually LED's that are intended for use as forward reference diodes. Glowing is normal. I've also seen this in an M504 Grand Integra Amplifier. They appear to be Rohm LTZ-R15.