Question about Crown XLS 602 2-Channel Amplifier

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My 602 xls plays for 25 mins and then switches off. I switch it on after 5mins , It then works but switches off again

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Got the same problem on my amp right now.
Trough the schematics i could see that transistors bc184l & bc214l could be the cause in my case. If i turn it on, it can be ok for hours. Untill i turn up the knob with a speaker connected, in 30 sec it shuts down. The PTC on the rectifier board gets hot and also R21&R23 a bit. I will try to change the 3 pnp/npn and also tip50G.
I'll tell you how it will be...
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My 602 xls plays for 25 mins and then switches off - 602-xls-plays-25-mins-switches-off-w33v045kbg5i3nkax0w2nulu-1-1.jpg

Posted on Mar 05, 2015

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  •  Grubhead
    Grubhead Mar 06, 2015

    I would replace the device with the heat sink. Anything with one of them can produce thermal problems. Check the values of R21 and R23 to see if they match the colour code on them.

  • Prince Healer Sound System

    The control part of the circuit was fine. Problem still in. Took off all the mj15024/25 and were fine. Trying to change the BC184/214 & BF123/422 transistors on the channel part of the pcb. Those trans. are hard to be found.Also i would sostitute the SA1085.All the diodes passed the test and capacitors looks fine. Cesare

  • Prince Healer Sound System

    Changed all bc214 bc184 bc546 bc556 and others one with heat sink. but prob still on. Replacing the mj15025/25 so the final transistors. Last and expensive try. Desolded one by one from pcb but they passed the diode test with multimeter. Problem occurs when current flow through, even after 10 secs. One of them fails. I'll change them all.



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If it's not on a timer switch that somehow you have activated, it's likely to be a part that has become heat sensitive. Or has a thermal cut out. Heat sensitive parts can be traced by using a Freezer spray available from Electronic parts shops. You wait while the fault develops and then spray the suspect part. If it comes back to life you have located the fault. You have to do this one at a time to each suspect part. To help find the part ... If all power goes off then look to the power supply, if it's just the sound look to the power amp section for the faulty parts.

Posted on Apr 24, 2013


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Posted on Jan 02, 2017


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SOURCE: left channel not operating on crown xls 602

Every time i have this prob i've blown that channel. In my case i,ve had dodgy connections to my speakers and if it is operating with high voltage rails they don't take much to blow.
Take off cover and you will no doubt find fuses somewhere blown. If it has come from speakers you prob done the amp but if not you might be lucky and just have to replace a single fuse or so.Good luck,Paul

Posted on Feb 24, 2010


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SOURCE: There is a red light shinig inside my CROWN XLS

Lots of electronics have lights (LEDs) that turn on when they are plugged it. Most people just don't notice them. If it is working properly, then the light is normal.

Posted on Mar 04, 2010

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Got a crown amplifier XLS 602 its powering up the relays are clicking, all voltages seems ok the signal led's are on but there's no sound output on both channels. I manage to trace the signal

Check your input or output cables might be dirty I had the same problem
and 1 of my output wire was dirty so i sprayed tha electric cleaner and its all good now

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I have a Crown XLS 802 amp that works fine but the fans do not work. They, however, are not frozen. Any help is appreciated. Jim

It is capable of detecting cooling fan failure so I would presume it hasn't decided to engage the fans yet.

Jul 21, 2011 | Crown XLS 602 2-Channel Amplifier

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My crown 602 xls tripped a breaker, I reset breaker regained power to receptacle , I lost power to the amp no led's come on front when i pushed the small reset button on the back I still did not regain...

They use a breaker instead of a fuse.


power to the amplifier.


• The amplifier's Power switch is off.

• The amplifier is not plugged into the power receptacle.

• The amplifier's high-voltage power supply circuit breaker has tripped. Verify that the AC mains

voltage is correct, then press the Circuit Breaker button on the back panel.

Take it to the ER.

Jan 12, 2011 | Crown XLS 602 2-Channel Amplifier

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I have a Crown XLS 602 amp. I use it for my home stereo system..It is stored in a well ventilated cabinet with a cloth grill front. There is nothing under or on top of amp...I don't listen to my music real...

I would not recomend disconnecting the fans. They might be running to keep a certain heat sensitive (and perhaps expensive) part cool. However it could be the case that the fan speed control circuit has developed a fault, therefore the fans are running too fast.

Jun 30, 2010 | Crown XLS 602 2-Channel Amplifier

1 Answer

No power to Crown XLS 602 Amplifier


There may be some internal fuses on that unit.

You can open it by taking the cover off and looking for fuses and discolored parts.

It may have a thermal fuse on the power transformer which then will require service

Check the web for service people in the UK

Mar 31, 2010 | Crown XLS 602 2-Channel Amplifier

1 Answer

There is a red light shinig inside my CROWN XLS

Lots of electronics have lights (LEDs) that turn on when they are plugged it. Most people just don't notice them. If it is working properly, then the light is normal.

Mar 04, 2010 | Crown XLS 602 2-Channel Amplifier

1 Answer

The fault light immediately comes on my Crown XLS 602 power amp immediately upon turning it on. It will not go out?

Hi try disconnecting the speaker outs and turn off bridge (if its on) If it doesnt work still, then suggest direct to a crown agent. The amp has a 3 year no fault warranty. Hopefully its still in!

All the best

Aug 04, 2009 | Crown XLS 602 2-Channel Amplifier

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