Radio Fault

Gonzobard · Apr 1st, 2021, 21:59

My 850R has an original radio fitted. It has an intermittent fault whereby when turned on the radio powers up as normal but there is no sound. When turned off then back on it works fine. I’ve checked all the connectors and wires on the back of the unit and could not see any issues. Any thoughts as to what might be the problem? Thanks.

volvo again · Apr 2nd, 2021, 19:11

Do you mean when switched on/off using the power button on the radio or the ignition?

Gonzobard · Apr 2nd, 2021, 20:25

When the ignition is on and the power button is pushed the radio illuminates as normal but there is no radio feed through the speakers, can hear static with the volume up.

Luxobarge · Apr 2nd, 2021, 21:30

Does it do it only on FM, or does AM work, and CD, tape etc. - in other words, is it silent on all sources or just FM radio? There's a reason I ask......

Gonzobard · Apr 2nd, 2021, 22:30

Certainly silent on both FM and AM. The CD has never worked since I’ve had the car and I don’t think I have a single tape to be able to try it.

Derek UK · Apr 2nd, 2021, 23:38

If you switch off again after you have managed to get the radio to work does it go back to no sound from the radio? In other words does this sequence repeat itself? If the CD section is faulty it might be defaulting to that when you switch on. Faulty CD selector switch maybe

Gonzobard · Apr 3rd, 2021, 05:36

I don’t think the sequence repeats itself, if working and I turn it off it works when turned back on. I had assumed the fault lay somewhere outside the unit itself, ie. in the wiring, I hadn’t considered it being an internal fault.

JohnM 855 T5R · Apr 3rd, 2021, 13:35

Quote:

Originally Posted by Gonzobard

When the ignition is on and the power button is pushed the radio illuminates as normal but there is no radio feed through the speakers, can hear static with the volume up.

If the car is an estate, the radio antenna is the fine wires in the passenger side rearmost window. This is fed by an aerial amplifier behind the internal side trim (Robert has a video on Youtube showing where it is and how to replace it).

My T-5R did much the same thing - switch on, nothing but radio static but then sometimes it would randomly pick up a signal OK. The aerial amplifier was on its way out. New ones are unavailable but there are loads on eBay second hand. Also, any aerial amplifier of a similar spec should work fine.

John

Gonzobard · Apr 3rd, 2021, 16:30

Thanks John, I’ll look up Roberts’s video. Can I determine at the head unit end whether a signal is being received or not?

Gonzobard · Apr 3rd, 2021, 16:31

Sorry, yes, it is an estate.

Apr 1st, 2021, 21:59	#1
Gonzobard Member Last Online: Oct 6th, 2023 07:12 Join Date: Mar 2019 Location: Reading	Radio Fault My 850R has an original radio fitted. It has an intermittent fault whereby when turned on the radio powers up as normal but there is no sound. When turned off then back on it works fine. I’ve checked all the connectors and wires on the back of the unit and could not see any issues. Any thoughts as to what might be the problem? Thanks.

Apr 2nd, 2021, 19:11	#2
volvo again Master Member Last Online: Yesterday 17:46 Join Date: Jun 2018 Location: Presteigne, mid Wales	Do you mean when switched on/off using the power button on the radio or the ignition? __________________ 1998 V70 2.5 Auto & Supercharged Mercedes C Class...

Apr 2nd, 2021, 21:30	#4
Luxobarge Premier Member Last Online: Today 10:48 Join Date: Jan 2011 Location: Horne (Nr. Horley)	Does it do it only on FM, or does AM work, and CD, tape etc. - in other words, is it silent on all sources or just FM radio? There's a reason I ask...... __________________ Some people are like Slinkies, they serve no useful purpose but they still bring a smile to your face when you push them downstairs.

Apr 2nd, 2021, 20:25	#3
Gonzobard Member Last Online: Oct 6th, 2023 07:12 Join Date: Mar 2019 Location: Reading	When the ignition is on and the power button is pushed the radio illuminates as normal but there is no radio feed through the speakers, can hear static with the volume up.

Apr 2nd, 2021, 22:30	#5
Gonzobard Member Last Online: Oct 6th, 2023 07:12 Join Date: Mar 2019 Location: Reading	Certainly silent on both FM and AM. The CD has never worked since I’ve had the car and I don’t think I have a single tape to be able to try it.

Apr 2nd, 2021, 23:38	#6
Derek UK VOC Member Last Online: Yesterday 14:24 Join Date: Jul 2006 Location: Chatham	If you switch off again after you have managed to get the radio to work does it go back to no sound from the radio? In other words does this sequence repeat itself? If the CD section is faulty it might be defaulting to that when you switch on. Faulty CD selector switch maybe

Apr 3rd, 2021, 05:36	#7
Gonzobard Member Last Online: Oct 6th, 2023 07:12 Join Date: Mar 2019 Location: Reading	I don’t think the sequence repeats itself, if working and I turn it off it works when turned back on. I had assumed the fault lay somewhere outside the unit itself, ie. in the wiring, I hadn’t considered it being an internal fault.

Apr 3rd, 2021, 16:30	#9
Gonzobard Member Last Online: Oct 6th, 2023 07:12 Join Date: Mar 2019 Location: Reading	Thanks John, I’ll look up Roberts’s video. Can I determine at the head unit end whether a signal is being received or not?

Apr 3rd, 2021, 16:31	#10
Gonzobard Member Last Online: Oct 6th, 2023 07:12 Join Date: Mar 2019 Location: Reading	Sorry, yes, it is an estate.

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