Blaupunkt tha-555

mikeywarduk · 03-08-2020, 01:18 PM

Can anyone help I've installed a blaupunkt tha-555 plug and play and have lost some of my radio signals if I disconnect the amp the I get all the fm stations back anybody help as I'm stuck for ideas I've tried changing the ground to different positions and still no joy

ctuna · 03-08-2020, 01:50 PM

mikeywarduk · 03-08-2020, 02:07 PM

Thanks for the reply I've got the base stereo and it's been coded to hifi I've mounted the amp on the back of the seat in the boot and connected the power cable to the battery and the ground to the earth point on the rear wheel where the earth points are I've tried it to the negative on the battery and it still can not get very good reception

ctuna · 03-08-2020, 02:47 PM

mikeywarduk · 03-08-2020, 02:59 PM

Hi yes 100% coded to hi fi as the rear parking sensor sound went quiet what do you mean by separate the parallel connection between the doors
Yes I've ran the 2 underseat subs seperate to amp
Also if I've had the headunit coded that would lower the voltage to 5v so would I have to change it on the amp as its set to 8v

ctuna · 03-08-2020, 05:00 PM

The Front Door Speakers are wired in parallel with the underseat
speakers in the base system . Either at the connector to the under seat
speaker or in the Door Sills depending on the Year of the Car.

The speaker output from the head unit is speaker out that means
no common ground on what was formally the speaker lines.
Some amps only accept single ended common ground signals.
Basicly the speaker lines from the head unit are reduced to 5 volts .
This is called a differential output. Your amp must be capable of accepting
this type of double ended signal.

mikeywarduk · 03-08-2020, 05:04 PM

I've ran the underseat subs seperate they go straight to the amp as I've got aftermarket subs installed I've had it coded to hifi which changes it to 5 v and on the amp its set to 8v would that need to be changed as it goes for 8v to 0.3v

ctuna · 03-08-2020, 05:40 PM

should be close enough and you have trim to match the levels.

mikeywarduk · 03-09-2020, 01:13 AM

What do you mean trim to match the levels could I not fit something to stop the interference so I can get the radio stations working

ctuna · 03-09-2020, 03:59 AM

You never said how your Inputs were wired.(speaker outs or RCA)
You have not established that the Blaupunkt accepts double ended
Inputs on the RCA's if you are using those.
You should call the Balu Punct number and establish that.

mikeywarduk · 03-09-2020, 07:07 AM

It's speaker wired ( loom that connects to the back of the headunit then goes to the amp) as I haven't got any rca connected and their is no rca outputs on the headunit as it a factory idrive

ctuna · 03-09-2020, 12:47 PM

So you have raw wiring from the head unit (+/- wires from each speaker/head output) going into terminal's on the amp. Going into the high level inputs
or the low level inputs on the amp (or does it have terminal's for both of those.)

Is the ground at the head unit to chassis ground good.

mikeywarduk · 03-09-2020, 02:03 PM

Yeah it has terminals for both the ground is good as if I disconnect the amp I get the fm signal come back would a fm amplifier booster work

ctuna · 03-09-2020, 02:53 PM

doesn't make any sense . Try just disconnecting the inputs not letting
them touch.
Trying to fix something that's not broken or related by putting a patch
on it is not rational.

If it was me I would try an isolating level shifter before trying to fix
anything in the radio that you know is working.
Also I would call blaupunkt and see if they can help you.

mikeywarduk · 03-09-2020, 04:43 PM

What's a isolating level shifter

ctuna · 03-09-2020, 05:07 PM

I am having to walk you though a lot of basic stuff you could
research yourself. Call Blaupunkt see what they say.

03-08-2020, 01:18 PM	#1
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	Blaupunkt tha-555 Can anyone help I've installed a blaupunkt tha-555 plug and play and have lost some of my radio signals if I disconnect the amp the I get all the fm stations back anybody help as I'm stuck for ideas I've tried changing the ground to different positions and still no joy
	Appreciate 0 Tweet Quote

03-08-2020, 01:50 PM	#2
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	It's important if you want an intelligent response to list the type of sound system you have. There are three basic BMW sound systems . The base system , stereo system and Logic 7 sometimes called HK. BMW stereo types http://www.e90post.com/forums/showthread.php?t=352586 http://www.e90post.com/forums/attach...2&d=1266451970 http://www.e90post.com/forums/attach...2&d=1260829447 http://www.e90post.com/forums/showthread.php?t=138949 http://www.e90post.com/forums/attach...1&d=1209780865 http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/ http://technicpnp.com/menuDiagrams/d...e90_92_93.html http://www.musicarnw.com/page-2/ http://www.e90post.com/forums/attach...3&d=1169133185 http://www.e90post.com/forums/attach...1&d=1209780605 http://www.e90post.com/forums/showthread.php?t=641323 http://www.e90post.com/forums/attach...4&d=1278871872 http://www.e90post.com/forums/showthread.php?t=343673 I would submit pictures of your connections and mount locations.
	Appreciate 0 Quote

03-08-2020, 02:07 PM	#3
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	Thanks for the reply I've got the base stereo and it's been coded to hifi I've mounted the amp on the back of the seat in the boot and connected the power cable to the battery and the ground to the earth point on the rear wheel where the earth points are I've tried it to the negative on the battery and it still can not get very good reception
	Appreciate 0 Quote

03-08-2020, 02:47 PM	#4
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	The amplifier should have nothing to do with the head unit if it is properly set up. In fact I think it would be hard to get one to effect the other are you sure you successfully made the change to Hi Fi. Also did you separate the parallel connection between the doors and floors in the Front of the car. Base System Upgrades http://www.e90post.com/forums/showthread.php?t=1378833 base system wiring pre/post 3/09 https://www.google.com/url?sa=t&rct=...tDpLJPcGkw_ui_ http://www.e90post.com/forums/attach...1&d=1411521234 http://www.e90post.com/forums/showth...ghlight=Dotech http://www.bimmerfest.com/forums/sho...d.php?t=550771 http://www.e90post.com/forums/showthread.php?t=445266 http://www.e90post.com/forums/showthread.php?t=581379 http://www.e90post.com/forums/showthread.php?t=494299 http://www.e90post.com/forums/showthread.php?t=451941 http://www.e90post.com/forums/showth...ht=amp+upgrade http://www.e90post.com/forums/showthread.php?t=540954 http://f30.bimmerpost.com/forums/sho....php?t=1003810 http://www.e90post.com/forums/showth...1#post16679904 http://www.e90post.com/forums/showthread.php?t=822366 http://www.diymobileaudio.com/forum/...morel-jbl.html http://www.e90post.com/forums/attach...1&d=1411521234 http://www.1addicts.com/forums/showthread.php?t=634957 http://www.e90post.com/forums/showthread.php?t=495855 http://www.e90post.com/forums/showthread.php?t=495855 http://www.e90post.com/forums/attach...1&d=1411521234 http://www.1addicts.com/forums/showthread.php?t=634957 With that amp I assume your plan was to have a real sub or run the sub channel on the two under seats. You might try running only the front channels . Last edited by ctuna; 03-08-2020 at 02:56 PM..
	Appreciate 0 Quote

03-08-2020, 02:59 PM	#5
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	Hi yes 100% coded to hi fi as the rear parking sensor sound went quiet what do you mean by separate the parallel connection between the doors Yes I've ran the 2 underseat subs seperate to amp Also if I've had the headunit coded that would lower the voltage to 5v so would I have to change it on the amp as its set to 8v Last edited by mikeywarduk; 03-08-2020 at 05:02 PM..
	Appreciate 0 Quote

03-08-2020, 05:00 PM	#6
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	The Front Door Speakers are wired in parallel with the underseat speakers in the base system . Either at the connector to the under seat speaker or in the Door Sills depending on the Year of the Car. The speaker output from the head unit is speaker out that means no common ground on what was formally the speaker lines. Some amps only accept single ended common ground signals. Basicly the speaker lines from the head unit are reduced to 5 volts . This is called a differential output. Your amp must be capable of accepting this type of double ended signal. Last edited by ctuna; 03-08-2020 at 05:08 PM..
	Appreciate 0 Quote

03-08-2020, 05:04 PM	#7
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	I've ran the underseat subs seperate they go straight to the amp as I've got aftermarket subs installed I've had it coded to hifi which changes it to 5 v and on the amp its set to 8v would that need to be changed as it goes for 8v to 0.3v Attached Images
	Appreciate 0 Quote

03-08-2020, 05:40 PM	#8
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	should be close enough and you have trim to match the levels.
	Appreciate 0 Quote

03-09-2020, 01:13 AM	#9
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	What do you mean trim to match the levels could I not fit something to stop the interference so I can get the radio stations working
	Appreciate 0 Quote

03-09-2020, 03:59 AM	#10
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You never said how your Inputs were wired.(speaker outs or RCA) You have not established that the Blaupunkt accepts double ended Inputs on the RCA's if you are using those. You should call the Balu Punct number and establish that.
	Appreciate 0 Quote

03-09-2020, 07:07 AM	#11
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	It's speaker wired ( loom that connects to the back of the headunit then goes to the amp) as I haven't got any rca connected and their is no rca outputs on the headunit as it a factory idrive
	Appreciate 0 Quote

03-09-2020, 12:47 PM	#12
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	So you have raw wiring from the head unit (+/- wires from each speaker/head output) going into terminal's on the amp. Going into the high level inputs or the low level inputs on the amp (or does it have terminal's for both of those.) Is the ground at the head unit to chassis ground good.
	Appreciate 0 Quote

03-09-2020, 02:03 PM	#13
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	Yeah it has terminals for both the ground is good as if I disconnect the amp I get the fm signal come back would a fm amplifier booster work
	Appreciate 0 Quote

03-09-2020, 02:53 PM	#14
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	doesn't make any sense . Try just disconnecting the inputs not letting them touch. Trying to fix something that's not broken or related by putting a patch on it is not rational. If it was me I would try an isolating level shifter before trying to fix anything in the radio that you know is working. Also I would call blaupunkt and see if they can help you.
	Appreciate 0 Quote

03-09-2020, 04:43 PM	#15
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	What's a isolating level shifter
	Appreciate 0 Quote

03-09-2020, 05:07 PM	#16
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	I am having to walk you though a lot of basic stuff you could research yourself. Call Blaupunkt see what they say.
	Appreciate 0 Quote