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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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HU 850 No sound - Swopping circuit board with HU 803 circuitViews : 1573 Replies : 5Users Viewing This Thread : |
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Feb 27th, 2017, 18:36 | #1 |
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HU 850 No sound - Swopping circuit board with HU 803 circuit
My radio has suffered from the no sound except 5 second full volume bursts whether radio switched on or not. I've dismantled the radio to look for dry joints but couldn't find any. But the main circuit board looks burnt/overheated in one area. I purchased a second hand HU 803 unit (£35) that works fine but doesn't secure into the vacant location nor does the aluminium effect trim attach back on.
As the cheapest second hand HU 850 is £150 + p&p and also the HU 803 doesn't drive the remote volume and channel controls (backlights work fine) nor the reversing sensors; I'm wondering can I swap the main circuit board from the HU 803 into the HU 850 and every thing will work?? Last edited by Chrismmoore; Feb 27th, 2017 at 18:39. |
Feb 27th, 2017, 21:40 | #2 |
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Last Online: Jan 15th, 2022 11:23
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I think you'll find the HU803 you've bought is pre-facelift (2004/5) whereas your HU850 is post-facelift so they are different shapes and mounting types. As the units are quite different I'd be surprised if the PCB was interchangeable.
If you end up going for an aftermarket stereo, I've got a fascia plate and all the wiring needed to fit a double DIN unit for £40. |
Feb 28th, 2017, 02:36 | #3 |
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There were two 'shapes' around the radio depending on the years.
How is the amp under the front seat, signs of corrosion? usually it's the amp that gives up. The 850 wasn't near as good as the 803. Even a 603 is not bad but not great either, but bullet proof and works without the amp
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Feb 28th, 2017, 07:15 | #4 |
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Thanks, aftermarket looks fine but I was curious about how the connection at the back matched up so went for the sh volvo unit, so tell me how do the connection blocks work out are they the same or do you have to convert.
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Feb 28th, 2017, 07:20 | #5 | |
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Quote:
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Feb 28th, 2017, 08:00 | #6 |
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Last Online: Jan 15th, 2022 11:23
Join Date: Feb 2009
Location: Salisbury (ish)
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The aftermarket stereo comes with a standard ISO connector into which you connect the ISO to Volvo lead which then connects to vehicle's wiring. There is a second lead that converts the aerial plug to conventional type. You will lose the use of the underseat amp (if fitted), steering wheel controls, RTI voice guidance and parking sensor beeps. You can often buy a CANBUS adapter to regain use of steering wheel controls if required.
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hu 803, hu 850, no sound, volvo s80, volvo v70 |
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