NAD 3225pe lost one channel ?

[Viper x]

Hi all,

Any tips as to what might have happened ?

Could it be just a fuse ?

thanks in advance

 

[rayma]

Could it be just a fuse ?

Can't be a fuse, but there is both an output thermal switch and phone jack switch on each channel.
Try stereo headphones to see if you hear both channels. If not, check the E401 and E402 switches
for continuity and good solder joints.

 

[Viper x]

Thanks very much for the reply

Are these switches to be found on the outside rear of the amp or inside the box ?

Thanks

 

[rayma]

Are these switches to be found on the outside rear of the amp or inside the box ?

First try using headphones, that switch is built into the headphone jack.
When the headphones' plug is fully inserted, the speakers are switched off.

If you DO NOT get both channels in the headphones, then it is possible that the
pcb mounted thermal switch is defective. That part is mounted on the internal
circuit board, and would be checked with an ohm meter for 0 ohms,
with the power turned off and unplugged. If it tests ok, then there is a problem
in the amplifier circuit before the thermal switch.

If you DO get both channels in the headphones, then the headphone jack, or the
related wiring, may be defective.

Be sure that the problem is actually in the amplifier, and not in the other equipment
or wiring.

 

[Viper x]

B&W DM600 speakers where is the fuse?

Hi there


Speaker has stopped working

Is there a fuse and where would it be located please


thanks in advance

 

[Viper x]

Found it thanks

 

[Ian Finch]

If a speaker fuse has actually blown, it means you have a bad situation with the associated power amplifier. If so, turn volume right down, remove speaker leads and use a multimeter to measure any DC voltage across the output terminals of both the non-working and working channels. There should be no more than a few tens of mV. If it is in the order of volts, most likely the non-working amplifier has blown transistors in its output stage.

Don't try to operate a power amplifier into a load (speaker) when there is a DC fault. It just ensures the complete destruction of either or both amplifier and speaker coil.