Question:
Ok Ive had an ongoing problem since I received my 3802 about 4 months ago. When I turn the unit off with the big switch on the amp instead of just putting to stand by with remote its fine. However I then need to turn it back on with the main unit switch and when I do, Id say about 50% of the time the unit fuses.
I have a 3 amp fuse in the plug which I believe is the right one, if not could someone please state otherwise?
Anyone have any ideas as to what can cause it or what checks I can run? As soon as I replace the fuse it works fine and has never fused if I just leave in stand by - -yes I could just use the remote but nonetheless something is wrong.
Any help would be most appreciated.
CS
3 amp may be a little low for a 3802, I would have thought 5 amp as there are 6 high power amps in the thing! Not 100% sure though, what does it say the power rating is on the back of the amp?
Had a look on the back and couldnt really see anything. Do you know where I need to look?On the plug it says "fit a 3A (5A) fuse". Im not clued up electrically so not sure what to look for on the unit sorry - -any ideas?
CS
There should be a Wattage rating on the back of the amp from which will be able to work out the amperage fure required.
The max. watts (power consumption) divided by 240 v will give you the max amps the unit can 'pull'.
Look in the instruction book under Specifications.
Look for Power consumption. I have a Denon A1SR and mine is 720W.
Therefore 720 divided by 240 is 3. So I have a 3A fuse fitted. A 3802 should be the same or probably less so a 3A shouldn't keep blowing!
From the manual I have
power supply : AC 230 V, 50Hz
power consumption: 400W, 2W (Standby).
If this is the information needed as described above then 3A should be no problem, yet it still keeps blowing. Can any other 3802 owners confirm this info?
If its confirmed, anyone with theories as to why it is blowing?Power supply in house, wires touching, too many plugs on one socket, any of these ?
Cheers people for the input. Hope it gets solved.
CS
I looked in a few other 3802's today and they fit a 3A as standard. I think you should take it back to the shop. I hope this doesn't involve anything to do with Haydn Lab's (Denon UK) as they are pitiful when it comes to customer relations (sorry).
Cheers ljp - - if it persists then I will definitely take it back. The problem I have is it does not happen every time I switch it off but very often. Is it possible to be the power source or cabling in the house? Think Ill disconnect all leads and just turn it on and off a few times - -then try it in a different plug to see if that has any effect. Cheers for the help and Ill keep you posted on my success or lack of it.
CS
If you have a safety breaker for something like a lawnmower try that but I would take the unit back before the guarantee expires!
Originally posted by captainshadwell
From the manual I have
power supply : AC 230 V, 50Hz
power consumption: 400W, 2W (Standby).
If this is the information needed as described above then 3A should be no problem, yet it still keeps blowing. Can any other 3802 owners confirm this info?
If its confirmed, anyone with theories as to why it is blowing?Power supply in house, wires touching, too many plugs on one socket, any of these ?
Cheers people for the input. Hope it gets solved.
CS
If you can, try plugging the Receiver into a surge protected adapter rather than directly into the mains and see if that helps.
Was thinking about the surge protector but ideally I want to know whats wrong with either the amp or the house electric. Ill check but I think there is a 2 year warranty on it so no probs with taking it back for quite a while.
Does anyone know what is the physical difference in turning to stand by and turning off - - the specific difference may give us some clue.
Cheers CS
Hello captainshadwell,
I too have a Denon 3802 AV Amp but have not had any of the problems you say. I have the standard plug and lead plugged into a Belkin surge protector unit. I cannot remember the model No but it has 6 outlet sockets and a telephone in/out point. It said on the instructions that it would cover £20,000.00 worth of equipent pluged into it. Got the Telly, Denon, DVD, Sky box and a CD player all pluged in. I wired the main socket on the wall myself 7 years ago when I moved into my house, so I know its as clean as possible supply. Maybe you have a "noisy" mains which is affecting the power delivery ?
Good luck in tracking down the problem.
3 amp may be a little low for a 3802, I would have thought 5 amp as there are 6 high power amps in the thing!
The Denon 3802 has 7 power amps! The standard 5 and 2 center rears, or other multi-room application.:)
Originally posted by Contar
The Denon 3802 has 7 power amps! The standard 5 and 2 center rears, or other multi-room application.:)
But it still only uses 400 watts!
Originally posted by ljp
But it still only uses 400 watts!
Exactly, hence why I asked about the overall power rating. 400W should easily be handled by 3 amp fuses unless there is something wrong!
Originally posted by Kryten
Exactly, hence why I asked about the overall power rating. 400W should easily be handled by 3 amp fuses unless there is something wrong!
Sorry I wasn't the comment wasn't directed at you. It was more a general it doesn't matter how many power amps it has in it the power consumption is still only 400 watts.
(My car stereo is over 1000 (RMS) watts!)
Originally posted by ljp
Sorry I wasn't the comment wasn't directed at you. It was more a general it doesn't matter how many power amps it has in it the power consumption is still only 400 watts.
(My car stereo is over 1000 (RMS) watts!)
I know, and my comment wasn;t aimed back at you ;) Like you say its actual power consupmtion. Eash amp will take some wattage which is a % of what it outputs so the more amps and the more powerful that they are the more power they draw, simple logic. But as you say the output wattage has little in common with power drawn.
So captainshadwell have you any news?
OK so its been a good while but Ive been away and have not been able to get to the amp until today.
The amp was turned on at the main switch and surprise - - it fused.
I then decided to unplug all leads. I unplugged the amp, changed the fuse for another 3A fuse and took it in to another room.
With no leads going in to the amp I plugged it in in another room. I turned the unit on at the mian switch and it fused straight away. I think this shows that the plug socket in the lounge is not at fault.
I replaced the fuse again with a 3A and turned it on again in the same socket. It worked fine. I turned it to stand by and back on, no problems there as usual. I then turned it on and off a few times at the main switch on the amp and still no problems.
So I left it there for a few minutes and then went to turn it on again and it fused. Changed the fuse and fine again.
So as you can see I dont believe there is any pattern as to when it fuses, but it definitely only happens when being turned on and off at main switch on amp as oppose to stand by position. Differerent plug socket makes no difference and having all the leads out makes no difference.
Anyone have any ideas as to what it could be? And if it is broken, any ideas as to what is broken on the unit?
Any responses would be most appreciated as usual as this is really bugging me now.
Please help
Thanks
CS
If its still under warranty I would get it looked at. I don't think it should fuse like that.
Originally posted by captainshadwell
OK so its been a good while but Ive been away and have not been able to get to the amp until today.
The amp was turned on at the main switch and surprise - - it fused.
I then decided to unplug all leads. I unplugged the amp, changed the fuse for another 3A fuse and took it in to another room.
With no leads going in to the amp I plugged it in in another room. I turned the unit on at the mian switch and it fused straight away. I think this shows that the plug socket in the lounge is not at fault.
I replaced the fuse again with a 3A and turned it on again in the same socket. It worked fine. I turned it to stand by and back on, no problems there as usual. I then turned it on and off a few times at the main switch on the amp and still no problems.
So I left it there for a few minutes and then went to turn it on again and it fused. Changed the fuse and fine again.
So as you can see I dont believe there is any pattern as to when it fuses, but it definitely only happens when being turned on and off at main switch on amp as oppose to stand by position. Differerent plug socket makes no difference and having all the leads out makes no difference.
Anyone have any ideas as to what it could be? And if it is broken, any ideas as to what is broken on the unit?
Any responses would be most appreciated as usual as this is really bugging me now.
Please help
Thanks
CS
You shuld have taken it back to the shop by now. I pity you really Denon UK :brickwall
(I have Denon stuff myself BTW)
Shouldnt b a problem with the shop - -good odds they will just give me a replacement if they ahev any in stock - they r good like that. Hope I dont have to take to Denon though - but either way, you think it should definitely go back - -nothing else I can try here to make sure?
CS
Its a nice sunny Saturday I think you whould pay them a visit today - let us know how you get on. While you're there have a demo of the A1 amp & A1 player - you may be tempted to upgrade ;)
Haha, upgrade is tempting but sure how much longer I can go without projector.
Cant actually take the amp back to the shop today as its in Manchester, but Ill give them a buzz and see what they say.
Cheers for all the help ljp and others - -and if you have any more ideas please post them.
Cheers CS
It is quite clear that the Denon is very sick. The fuse should not blow if the unit was operating normally but it sounds as if it is drawing too much power when switched on from cold. (i.e. not from standby). The fuse is there to protect the unit if something is shorting but the more you keep on with it, the greater the chance of terminal damage. The unit may be damaged irretrievably or even worse, could catch fire.
Therefore, on the assum the only thing I could think of but not sure of any reason for it. Ill have to give superfi a buzz and c what they say. 2 year warranty still on it so should not b a problem. The warranty is initially with superfi so I hope they will do a straight swap - -otherwise its to dealing with Denon labs. Could b fun.
CS
Doesn't have to be drawing too much power for the fuse to blow it could be something like one of the regulators in the power supply has died and thus creating a dead short across the power rails.
If you do have to phone up Denon UK under no circumstances speak to the 'technical' guys. I doubt it very much if they wear shoes that have laces in because they haven't figured out how to tie them yet!!
;)
Just a swift phone call to Iris Layman should do the trick she is customer support manager for Haydn Labs (Denon) in the UK.
I can give you her phone number if you have probs with Superfi.
Good luck!
Cheers ljp - -Ill keep you posted as to how it goes with Superfi. Hopefully wont be needing that number anytime soon.
Cheers again
CS
I have a 3 amp fuse in the plug which I believe is the right one, if not could someone please state otherwise?
Anyone have any ideas as to what can cause it or what checks I can run? As soon as I replace the fuse it works fine and has never fused if I just leave in stand by - -yes I could just use the remote but nonetheless something is wrong.
Any help would be most appreciated.
CS
Answers:
3 amp may be a little low for a 3802, I would have thought 5 amp as there are 6 high power amps in the thing! Not 100% sure though, what does it say the power rating is on the back of the amp?
Answers:
Had a look on the back and couldnt really see anything. Do you know where I need to look?On the plug it says "fit a 3A (5A) fuse". Im not clued up electrically so not sure what to look for on the unit sorry - -any ideas?
CS
Answers:
There should be a Wattage rating on the back of the amp from which will be able to work out the amperage fure required.
Answers:
The max. watts (power consumption) divided by 240 v will give you the max amps the unit can 'pull'.
Look in the instruction book under Specifications.
Look for Power consumption. I have a Denon A1SR and mine is 720W.
Therefore 720 divided by 240 is 3. So I have a 3A fuse fitted. A 3802 should be the same or probably less so a 3A shouldn't keep blowing!
Answers:
From the manual I have
power supply : AC 230 V, 50Hz
power consumption: 400W, 2W (Standby).
If this is the information needed as described above then 3A should be no problem, yet it still keeps blowing. Can any other 3802 owners confirm this info?
If its confirmed, anyone with theories as to why it is blowing?Power supply in house, wires touching, too many plugs on one socket, any of these ?
Cheers people for the input. Hope it gets solved.
CS
Answers:
I looked in a few other 3802's today and they fit a 3A as standard. I think you should take it back to the shop. I hope this doesn't involve anything to do with Haydn Lab's (Denon UK) as they are pitiful when it comes to customer relations (sorry).
Answers:
Cheers ljp - - if it persists then I will definitely take it back. The problem I have is it does not happen every time I switch it off but very often. Is it possible to be the power source or cabling in the house? Think Ill disconnect all leads and just turn it on and off a few times - -then try it in a different plug to see if that has any effect. Cheers for the help and Ill keep you posted on my success or lack of it.
CS
Answers:
If you have a safety breaker for something like a lawnmower try that but I would take the unit back before the guarantee expires!
Answers:
Originally posted by captainshadwell
From the manual I have
power supply : AC 230 V, 50Hz
power consumption: 400W, 2W (Standby).
If this is the information needed as described above then 3A should be no problem, yet it still keeps blowing. Can any other 3802 owners confirm this info?
If its confirmed, anyone with theories as to why it is blowing?Power supply in house, wires touching, too many plugs on one socket, any of these ?
Cheers people for the input. Hope it gets solved.
CS
If you can, try plugging the Receiver into a surge protected adapter rather than directly into the mains and see if that helps.
Answers:
Was thinking about the surge protector but ideally I want to know whats wrong with either the amp or the house electric. Ill check but I think there is a 2 year warranty on it so no probs with taking it back for quite a while.
Does anyone know what is the physical difference in turning to stand by and turning off - - the specific difference may give us some clue.
Cheers CS
Answers:
Hello captainshadwell,
I too have a Denon 3802 AV Amp but have not had any of the problems you say. I have the standard plug and lead plugged into a Belkin surge protector unit. I cannot remember the model No but it has 6 outlet sockets and a telephone in/out point. It said on the instructions that it would cover £20,000.00 worth of equipent pluged into it. Got the Telly, Denon, DVD, Sky box and a CD player all pluged in. I wired the main socket on the wall myself 7 years ago when I moved into my house, so I know its as clean as possible supply. Maybe you have a "noisy" mains which is affecting the power delivery ?
Good luck in tracking down the problem.
3 amp may be a little low for a 3802, I would have thought 5 amp as there are 6 high power amps in the thing!
The Denon 3802 has 7 power amps! The standard 5 and 2 center rears, or other multi-room application.:)
Answers:
Originally posted by Contar
The Denon 3802 has 7 power amps! The standard 5 and 2 center rears, or other multi-room application.:)
But it still only uses 400 watts!
Answers:
Originally posted by ljp
But it still only uses 400 watts!
Exactly, hence why I asked about the overall power rating. 400W should easily be handled by 3 amp fuses unless there is something wrong!
Answers:
Originally posted by Kryten
Exactly, hence why I asked about the overall power rating. 400W should easily be handled by 3 amp fuses unless there is something wrong!
Sorry I wasn't the comment wasn't directed at you. It was more a general it doesn't matter how many power amps it has in it the power consumption is still only 400 watts.
(My car stereo is over 1000 (RMS) watts!)
Answers:
Originally posted by ljp
Sorry I wasn't the comment wasn't directed at you. It was more a general it doesn't matter how many power amps it has in it the power consumption is still only 400 watts.
(My car stereo is over 1000 (RMS) watts!)
I know, and my comment wasn;t aimed back at you ;) Like you say its actual power consupmtion. Eash amp will take some wattage which is a % of what it outputs so the more amps and the more powerful that they are the more power they draw, simple logic. But as you say the output wattage has little in common with power drawn.
Answers:
So captainshadwell have you any news?
Answers:
OK so its been a good while but Ive been away and have not been able to get to the amp until today.
The amp was turned on at the main switch and surprise - - it fused.
I then decided to unplug all leads. I unplugged the amp, changed the fuse for another 3A fuse and took it in to another room.
With no leads going in to the amp I plugged it in in another room. I turned the unit on at the mian switch and it fused straight away. I think this shows that the plug socket in the lounge is not at fault.
I replaced the fuse again with a 3A and turned it on again in the same socket. It worked fine. I turned it to stand by and back on, no problems there as usual. I then turned it on and off a few times at the main switch on the amp and still no problems.
So I left it there for a few minutes and then went to turn it on again and it fused. Changed the fuse and fine again.
So as you can see I dont believe there is any pattern as to when it fuses, but it definitely only happens when being turned on and off at main switch on amp as oppose to stand by position. Differerent plug socket makes no difference and having all the leads out makes no difference.
Anyone have any ideas as to what it could be? And if it is broken, any ideas as to what is broken on the unit?
Any responses would be most appreciated as usual as this is really bugging me now.
Please help
Thanks
CS
Answers:
If its still under warranty I would get it looked at. I don't think it should fuse like that.
Answers:
Originally posted by captainshadwell
OK so its been a good while but Ive been away and have not been able to get to the amp until today.
The amp was turned on at the main switch and surprise - - it fused.
I then decided to unplug all leads. I unplugged the amp, changed the fuse for another 3A fuse and took it in to another room.
With no leads going in to the amp I plugged it in in another room. I turned the unit on at the mian switch and it fused straight away. I think this shows that the plug socket in the lounge is not at fault.
I replaced the fuse again with a 3A and turned it on again in the same socket. It worked fine. I turned it to stand by and back on, no problems there as usual. I then turned it on and off a few times at the main switch on the amp and still no problems.
So I left it there for a few minutes and then went to turn it on again and it fused. Changed the fuse and fine again.
So as you can see I dont believe there is any pattern as to when it fuses, but it definitely only happens when being turned on and off at main switch on amp as oppose to stand by position. Differerent plug socket makes no difference and having all the leads out makes no difference.
Anyone have any ideas as to what it could be? And if it is broken, any ideas as to what is broken on the unit?
Any responses would be most appreciated as usual as this is really bugging me now.
Please help
Thanks
CS
You shuld have taken it back to the shop by now. I pity you really Denon UK :brickwall
(I have Denon stuff myself BTW)
Answers:
Shouldnt b a problem with the shop - -good odds they will just give me a replacement if they ahev any in stock - they r good like that. Hope I dont have to take to Denon though - but either way, you think it should definitely go back - -nothing else I can try here to make sure?
CS
Answers:
Its a nice sunny Saturday I think you whould pay them a visit today - let us know how you get on. While you're there have a demo of the A1 amp & A1 player - you may be tempted to upgrade ;)
Answers:
Haha, upgrade is tempting but sure how much longer I can go without projector.
Cant actually take the amp back to the shop today as its in Manchester, but Ill give them a buzz and see what they say.
Cheers for all the help ljp and others - -and if you have any more ideas please post them.
Cheers CS
Answers:
It is quite clear that the Denon is very sick. The fuse should not blow if the unit was operating normally but it sounds as if it is drawing too much power when switched on from cold. (i.e. not from standby). The fuse is there to protect the unit if something is shorting but the more you keep on with it, the greater the chance of terminal damage. The unit may be damaged irretrievably or even worse, could catch fire.
Therefore, on the assum the only thing I could think of but not sure of any reason for it. Ill have to give superfi a buzz and c what they say. 2 year warranty still on it so should not b a problem. The warranty is initially with superfi so I hope they will do a straight swap - -otherwise its to dealing with Denon labs. Could b fun.
CS
Answers:
Doesn't have to be drawing too much power for the fuse to blow it could be something like one of the regulators in the power supply has died and thus creating a dead short across the power rails.
If you do have to phone up Denon UK under no circumstances speak to the 'technical' guys. I doubt it very much if they wear shoes that have laces in because they haven't figured out how to tie them yet!!
;)
Just a swift phone call to Iris Layman should do the trick she is customer support manager for Haydn Labs (Denon) in the UK.
I can give you her phone number if you have probs with Superfi.
Good luck!
Answers:
Cheers ljp - -Ill keep you posted as to how it goes with Superfi. Hopefully wont be needing that number anytime soon.
Cheers again
CS
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