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Question

my avr1602 has stopped working. It powers up, but no dicsplay and no output.

Submitted: 300 days and 3 hours ago.
Category: Electronics
Value: $12
Status: AWAITING CUSTOMER ACTION
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Posted by Paul 300 days and 3 hours ago.

Info Request

Hello and welcome to Just Answer. Do you have any tools like a meter and soldering equipment? Does the unit just click and then followed by the standby light flashing when it is turned on?

Thanks,

Paul

300 days and 3 hours ago.

Reply

 

yes to both

Posted by Paul 300 days and 3 hours ago.

Answer

Hello, there are a couple of possibilities here. First open the unit and look for a small glass fuse if you haven't already. It will be located near the rear right side of the unit. The fuse is usually an 8 amp gma style. Is the fuse ok?

 

Paul

300 days and 3 hours ago.

Reply

both seem fine

Posted by Paul 300 days and 3 hours ago.

Answer

Ok, if the fuses are good then I would suspect the power transformer. Could you standby while I pull the service manual so I can give you specific points to check. This will be using the meter on the ac voltage function.

Paul

300 days and 3 hours ago.

Reply

Paul

 

I have to go to an urgent call out.

i will get back to you later.

 

Nigel

Posted by Paul 300 days and 2 hours ago.

Info Request

Hello, no problem. When you get back to me, please let me know if this is a 120 volt model.

Thanks,

Paul

299 days and 20 hours ago.

Reply

240V UK spec.

Posted by Paul 299 days and 20 hours ago.

Info Request

Thanks, I will post some info soon that should lead to a solution.

Paul

Posted by Paul 299 days and 19 hours ago.

Answer

Hello, Take a look at this board layout and look at connectors cp102 and cp103 I have circled in red.

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Hopefully your meter probes are thin enough to insert into the top of the connectors to test for ac voltage. You should have around 240 mains at cp102 and at least 60 volts at cp103. Cp103 has three terminals so use the outer two for this measurement an let me know your findings. Also need to mention these measurements have to be taken within a few seconds of hitting the power button before the power relay switches back off. Have your probes in place before hitting the on button.

Paul



Edited by Paul on 1/27/2009 at 1:22 AM

297 days and 23 hours ago.

Reply

Paul

 

Sorry for the delay, had meter problems.

 

Have checked 240v at cp102, but 0v at the cp103

Accepted Answer

Hello, you have a bad power transformer. The transformer has a built in thermal fuse device but you can't really get to it to replace it since it is embedded in the windings of the transformer. It is usually rated at 156 Celsius. The transformer must have overheated. Causes of this can be a combination of not enough ventilation as well as too much load from speakers and high volume for a long period of time. It also has an amperage rating a surge can take them out as well. It is a safety device put in there to meet UL and other ratings. Replacing the power transformer will solve your problem. Probably one of the easiest repairs one can do on a receiver since everything is plug in.

If I have fully answered your question, please click accept and feel free to ask follow-up questions as well. I can get you the part number if needed. Transformer will cost about $80 us dollars. I don't know what in your currency.

 

Kind Regards,

Paul

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Expert: Paul
Pos. Feedback: 97.8 %
Accepts: 
Answered: 1/28/2009

Technician

25+ years Electronics Technician

297 days and 23 hours ago.

Reply

I could do with a part reference, I think I have traced one, but £110 + in the uk

 

Nigel

Posted by Paul 297 days and 23 hours ago.

Answer

Hello, here is the info straight out of the manual to make sure you get the proper one. I have circled in red.

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It is 29 in the exploded view ans E2 designates Europe model so the part number should be XXXXXXXXXX. Sometimes they sub to a different number but this is the number you would order it by. If price seems more it because I am used to the dealer prices.

Thanks for the accept and feedback. Don't hesitate if you have further questions.

 

Paul

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