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Weird radio HU-850 CD skipping in a S60 T5 MY2005

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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Skinkehunden
Posts: 14
Joined: 25 October 2009
Year and Model: Volvo S60 T5 2005
Location: Denmark

Weird radio HU-850 CD skipping in a S60 T5 MY2005

Post by Skinkehunden »

Hi.

I own a S60 T5 MY2005 fitted with a HU-850 and factory satnav. And I have encountered a bit of weird radio/CD skipping error lately. I have searched this forum and other Volvo related forums, but have not found a possible solution. Only a faint hint from a Polish guy with broken English and picture of a dismantled HU-850 unit.

During operation of the CD player, regardless of using burned CD's or store-bought CD's, the CD will either skip to a random track or play the same song at half the volume as before the trigger events occurs. The trigger event can either be activation of the parking sensor or with a RDS/Traffic Alert message cutting into operation/play. In normal conditions this will return to the CD and song, and continue to play as nothing has happend. But in my case, the CD will do the skip or play at half volume when returning.
You can clearly see it in the display of the radio when the skipping occurs. For example the radio is playing track 5, when the trigger event occurs, as soon as the it returns to the radio, the radio suddenly jumps to a random track, for example track 11, and starts playing that song. It *IS* pretty annoying when you cruise down the road with you favorite jam on, and the radio starts to pull this skipping on you :(

So the only solution that seems to fit my scenario (that I could find), is this single picture of a dismantled radio with a point to single large IC chip. From the broken English I guess that the HU-850 (and the HU-650) for that matter, tends to have bad connections after years of operation. The solution is to carefully re-solder the connections, but I have not tried that yet.

Do you guys have any idea, other than buying a second hand unit?
skinkehunden
Current: Volvo S60 T5 2005 150.000 km on the clock.
Previous:
- Volvo Volvo S60 2.4 2006 with 204.201 km on the clock.
- Volvo 440 Pacific 1.8 1995 with 258.197 km on the clock.
- Volvo 440DL 1.8 1992 with 268.500 km on the clock.
- Ford Escort 1.3 1977 with 64.000 km on the clock.

JRL
Posts: 9350
Joined: 22 November 2005
Year and Model: Several
Location: 19333
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Post by JRL »

No real solution, these radios are junk and fail in so many different ways, I've finally lost count.
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

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oragex
Posts: 5347
Joined: 24 May 2013
Year and Model: S60 2003
Location: Canada
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Post by oragex »

It seems your CD player has issues, no fix for it unless it's a cable connection loose somewhere - you need to disconnect the car battery when unplugging anything from the radio.

You can replace it with the HU-650 which doesn't sounds as great but it's more solid.

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jonesg
Posts: 3507
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Year and Model: 2004 V70
Location: Northern maine.
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Post by jonesg »

I think the polish guy was pointing out the hidden code on the chip,
wipe it with acetone and it clearly says "harbor Freight".

JRL
Posts: 9350
Joined: 22 November 2005
Year and Model: Several
Location: 19333
Been thanked: 16 times

Post by JRL »

A 650 is not better and fail just as often
Find a used 850, they're around. Make sure you buy from someone who will guarantee it.
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

Skinkehunden
Posts: 14
Joined: 25 October 2009
Year and Model: Volvo S60 T5 2005
Location: Denmark

Post by Skinkehunden »

Sucks to hear. Well, I have just ordered a GROM unit, so I will guess that will do. Thanks for the reply though.
skinkehunden
Current: Volvo S60 T5 2005 150.000 km on the clock.
Previous:
- Volvo Volvo S60 2.4 2006 with 204.201 km on the clock.
- Volvo 440 Pacific 1.8 1995 with 258.197 km on the clock.
- Volvo 440DL 1.8 1992 with 268.500 km on the clock.
- Ford Escort 1.3 1977 with 64.000 km on the clock.

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