Dear all, When I switch on my Marantz SR 7200 A/v receiver, it comes on and then immediately switches itself back to standby. Please tell me what to do...This thing cost alot of money and I feel cheated that I should lose it just like that. Sincerely Gladys
It is likely that the PA stage has developed an offset voltage in the output stage. The faulty amplifier channel can be found by progressively disconnecting the collectors of the of the power transistors until the protection fault disappears. Once the faulty channel is found the the cause of the offset has to be traced to the faulty transistor or resistor. Don't forget that if you can smell smoke or burning then there are likely to be components(esp transistors) that have been damaged by the fault.
I had a Luxman unit that destroyed 5 transistors in the output stage that was due to an open .5W resistor in the driver stage.
Good luck.
Possible Solution:
Your speaker cable end points are touching causing the amp to switch off to prevent short circuit.
Sounds like it is zapped (fried outputs). Time for a trip to the repair shop. Good luck.
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i have a Marantz SR 7200, It shuts off after 9 minutes after turning it on.
the standby red light remains on. I have tried removing all connections to see if it would eliminate this problem, this shut off. I have even pluged thr sr7200 into a different outlet in another room, i dont think the house wiring
is at fault. Any ideas?
I turn the amp on and it goes on for approximately 4 sec. and then switches to standby. It smelled like plastic for awhile there.
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