HU-803 Cuts Out

YellowPinkie · Nov 24th, 2008, 00:13

The HU-803 head unit in my 2001 S60 cuts out if I use it a high volume for more than a few minutes, so that I am left with just the sub-woofer (or nothing if not in pro-Logic or 3CH). If I turn off the radio for a 30 seconds or so, I get the audio back.

I assume this signifies an auto cut out on overheat - I've searched here and swedespeed and can't find any other reports of this fault. is it just me? Anyone know of a fix?

Clan · Nov 24th, 2008, 08:42

Yes this is a safety feature of the amplifier rather than the radio unit ... are you playing it at abnormal sound pressure levels or just normal use?

YellowPinkie · Nov 24th, 2008, 23:17

I don't think it's abnormal, I'm nearly 40 and drive a Volvo, so it can't be that excessive can it? Normally when I'm on the motorway, and have it cranked up a bit, but not so my ears bleed.

I wonder if the heatsinks might be fluffed up or something. Looks like a nightmare to pull the head unit to look though.

toolbah · Nov 24th, 2008, 23:31

Remember to disconect the battery before removing head unit as you will regester fault codes and not to remove battery for at least 10 mins after driving!!

jajrst · Nov 25th, 2008, 00:59

If you have a seperate amplifier it will be under the passengers seat, might be worth having a look about there and seeing if there's any obvious problems before pulling the HU out, it's quite a pain to get out lol.

Clan · Nov 25th, 2008, 07:58

All dolby pro-logic have an amplifier under the DRIVER'S seat and often when there is a fault its due to corrosion inside caused by wetness for what ever reason .. easy to check by taking it out and taking the cover off .

THOMO · Nov 25th, 2008, 08:52

it was happening to me for a while until my alternator blew . had a new one fitted and now i can play my tunes as on full volume.so maybe its on its way out like mine was.

jajrst · Nov 25th, 2008, 19:51

My one is definatly under the passengers seat...

Clan · Nov 25th, 2008, 20:15

odd ! i've never ever seen a factory amplifier under the left seat , its triangular under the right hand front seat ,I'm sure it is on Left hand drive too ...

S60-MBS · Nov 25th, 2008, 20:24

Quote:

Originally Posted by Clan

odd ! i've never ever seen a factory amplifier under the left seat , its triangular under the right hand front seat ,I'm sure it is on Left hand drive too ...

Theres summat triangular under my passenger seat with connections no idea what it is

Nov 24th, 2008, 00:13	#1
YellowPinkie Secret Squirrel Last Online: Sep 3rd, 2012 23:30 Join Date: Nov 2008 Location: Northampton	HU-803 Cuts Out The HU-803 head unit in my 2001 S60 cuts out if I use it a high volume for more than a few minutes, so that I am left with just the sub-woofer (or nothing if not in pro-Logic or 3CH). If I turn off the radio for a 30 seconds or so, I get the audio back. I assume this signifies an auto cut out on overheat - I've searched here and swedespeed and can't find any other reports of this fault. is it just me? Anyone know of a fix?

Nov 24th, 2008, 08:42	#2
Clan Experienced Member Last Online: Today 11:14 Join Date: Jun 2007 Location: L/H side	Yes this is a safety feature of the amplifier rather than the radio unit ... are you playing it at abnormal sound pressure levels or just normal use? __________________ My comments are only based on my opinions and vast experience .

Nov 24th, 2008, 23:31	#4
toolbah Master Member Last Online: Jul 5th, 2017 23:25 Join Date: Jan 2007 Location: Durham	Remember to disconect the battery before removing head unit as you will regester fault codes and not to remove battery for at least 10 mins after driving!! __________________ You missed a bit love. Now rub harder!!

Nov 25th, 2008, 07:58	#6
Clan Experienced Member Last Online: Today 11:14 Join Date: Jun 2007 Location: L/H side	All dolby pro-logic have an amplifier under the DRIVER'S seat and often when there is a fault its due to corrosion inside caused by wetness for what ever reason .. easy to check by taking it out and taking the cover off . __________________ My comments are only based on my opinions and vast experience .

Nov 25th, 2008, 20:15	#9
Clan Experienced Member Last Online: Today 11:14 Join Date: Jun 2007 Location: L/H side	odd ! i've never ever seen a factory amplifier under the left seat , its triangular under the right hand front seat ,I'm sure it is on Left hand drive too ... __________________ My comments are only based on my opinions and vast experience .

Nov 24th, 2008, 23:17	#3
YellowPinkie Secret Squirrel Last Online: Sep 3rd, 2012 23:30 Join Date: Nov 2008 Location: Northampton	I don't think it's abnormal, I'm nearly 40 and drive a Volvo, so it can't be that excessive can it? Normally when I'm on the motorway, and have it cranked up a bit, but not so my ears bleed. I wonder if the heatsinks might be fluffed up or something. Looks like a nightmare to pull the head unit to look though.

Nov 25th, 2008, 00:59	#5
jajrst Volvo S80 SE Owner Last Online: Jul 24th, 2023 18:57 Join Date: Aug 2007 Location: Westcliff on Sea	If you have a seperate amplifier it will be under the passengers seat, might be worth having a look about there and seeing if there's any obvious problems before pulling the HU out, it's quite a pain to get out lol.

Nov 25th, 2008, 08:52	#7
THOMO Junior Member Last Online: Dec 21st, 2013 02:17 Join Date: Oct 2007 Location: derbyshire	it was happening to me for a while until my alternator blew . had a new one fitted and now i can play my tunes as on full volume.so maybe its on its way out like mine was.

Nov 25th, 2008, 19:51	#8
jajrst Volvo S80 SE Owner Last Online: Jul 24th, 2023 18:57 Join Date: Aug 2007 Location: Westcliff on Sea	My one is definatly under the passengers seat...

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