Amp Shutting Down, need help

Hi Swampwalker,

I believe when the amp is first powered up using the switch breaker on the rear panel of the amp the breaker holds in the standby mode.....

The proper shut down procedure is to first push the power button on the front panel of the amp. That puts the amp in standby. The user can then turn off the amp with the main power switch/breaker on the rear panel of the amp or leave it on 24/7.

From what I have gathered from reading Sailcappy's posts, the amp could be left in standby indefinitely and not trip the magnetic breaker.

The problem starts when he pushes the power button on the front panel of the amp that starts the sequence from standby to active mode.

The switch/breaker is in series with hot of the 120V power.
That makes the breaker the gate keeper so to speak......
Jim

08-11-12: Sailcappy
I have a Cary 7.250 brand new amp that shuts down after 20 seconds in my NYC apartment.

08-21-12: Sailcappy
Remember this happens AFTER [emphasis added] i go from standby mode to Active mode.

Jim & Michael (Swampwalker), I've been interpreting these and other statements to mean that if the power switch/breaker at the rear of the amp has been properly turned off while in standby mode, and the rear power switch/breaker is subsequently turned on, and subsequent to that the front standby/active switch is turned to on/active, then 20 seconds later the breaker trips (if the extension cord is not used). That is what I was asking Sailcappy to confirm, in question (1) in my first post tonight.

Would a good SPD, surge protection device, installed between the amp and the wall outlet shunt out the high voltage transients?

Don't know. The oscilloscope experiment I suggested might help answer that.

Frank -- click the "markup tags" link just under the box near the bottom of the page in which responses are composed.

Have to sign off now until tomorrow.

Best regards,
-- Al

Look! Every time I get close to addressing and finishing a few paragraphs in response, all you guys quickly sneak in answers and more questions! So, I'll just sit patiently in the corner with a "filthy bed-wetter" sign on and wait fer a bit. :-D
08-21-12: Metro04

LOL......

To be very, very clear I will detail my power up process which is the same with and without the extension cord.

1. Prior to doing anything I check that the rear breaker On/Off switch is set to the off position and the front Standby/Active switch is set to the Standby position.

2. I then push the rear breaker On/Off switch to the On position.

3. I generally wait a little (I have varied the waiting time up to an hour) then I push the front Standby/Active button from Standby to Active.

4. I hear a lot of relay type clicking noises and the approx 20 seconds later if I do not use the extension cord the final click inside the amp trips the rear breaker On/Off switch to the Off position.

5. I then repeat this process every time I re-power the unit.

6. Music does not play during the first 20 seconds. When I use the extension cord after 20 seconds I get a final click that then allows music to play. It also turns on the LED light for the Cary Logo.

Sailcappy,

Thanks for the detailed start up procedure.

1. Prior to doing anything I check that the rear breaker On/Off switch is set to the off position and the front Standby/Active switch is set to the Standby position.

......"and the front Standby/Active switch is set to the Standby position."

Are you saying the front power switch is a maintained contact switch and not a momentary contact switch?

In other words the push button switch has two positions, in and out?

You did not give the shut down procedure but I assume you

put the amp in standby by pushing the power switch on the front panel first and then flip off the switch on the back panel.

6. Music does not play during the first 20 seconds. When I use the extension cord after 20 seconds I get a final click that then allows music to play. It also turns on the LED light for the Cary Logo.

So the final click is the killer.....

Have you thought about sending the Agon Link of this thread of yours to Cary service support?

A look inside of the Cary 7.25.
.