Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts  See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
OEM Stereo Woes
Page: Previous  1, 2, 3
Forum Index -> Vanagon Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
Merian
Samba Member


Joined: January 04, 2014
Posts: 4937
Location: Orygun
Merian is offline 

PostPosted: Mon Mar 21, 2016 5:30 pm    Post subject: Re: OEM Stereo Woes Reply with quote

Is Bluetooth high fidelity?
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Zeitgeist 13
Samba Member


Joined: March 05, 2009
Posts: 9596
Location: Port Manteau
Zeitgeist 13 is offline 

PostPosted: Mon Mar 21, 2016 5:38 pm    Post subject: Re: OEM Stereo Woes Reply with quote

http://beckerautosound.com/upgrade-radios/3126974
_________________
Casey--
Seven VW vans from T1 through T4 since 1985
Volkswagens powered by Volkswagen
Respect the marque
Back to top
View user's profile Send private message Gallery Classifieds Feedback
chase4food
Samba Member


Joined: February 27, 2016
Posts: 636
Location: PNW im Amerika
chase4food is offline 

PostPosted: Mon Mar 21, 2016 5:41 pm    Post subject: Re: OEM Stereo Woes Reply with quote

You should be able to expect equivalent fidelity to CD quality stereo performance. No multi-channel support like Dolby Digital or DTS. I use it to watch Netflix movies all the time with my camper's sound system. I tried HBO Now and their app screwed up big time. It pass DD stream to the head unit which of course just throw up its hands. Rolling Eyes
_________________
- Vince 飲食玩睡

what Isolde wants Isolde doesn't always get, 4 I know what is best for her - Liebe macht frei
Back to top
View user's profile Send private message Classifieds Feedback
Merian
Samba Member


Joined: January 04, 2014
Posts: 4937
Location: Orygun
Merian is offline 

PostPosted: Tue Mar 22, 2016 11:02 am    Post subject: Re: OEM Stereo Woes Reply with quote

I wonder about the HiFi of a low bit rate xfer medium like Bluetooth...
Back to top
View user's profile Send private message Gallery Classifieds Feedback
chase4food
Samba Member


Joined: February 27, 2016
Posts: 636
Location: PNW im Amerika
chase4food is offline 

PostPosted: Tue Mar 22, 2016 11:14 am    Post subject: Re: OEM Stereo Woes Reply with quote

Merian wrote:
I wonder about the HiFi of a low bit rate xfer medium like Bluetooth...


Bluetooth specs has been in constant evolution. Countless features, functionality, and performance enhancements have been added since its early slow start. Do take note that technology like this always have to provide support for backward incompatibilities with legacy devices. It takes two to dance, so if one device cannot support the newer and better feature the operation will fall back on one that mutually support.

BT audio spec is very complicated. But the gist is there is a baseline mandatory CODEC that all devices must support, and many other optional CODECs with increased performance as well as implementation differences.

If your devices is relatively new - within the last few years, you should expect reasonable performance. Do note that most of these CODECs are lossy. From what I heard, Apple's Carplay has lossless audio CODEC support, though I can reasonably it is only both devices (source and sink) supports it.
_________________
- Vince 飲食玩睡

what Isolde wants Isolde doesn't always get, 4 I know what is best for her - Liebe macht frei
Back to top
View user's profile Send private message Classifieds Feedback
DwarfVader
Samba Member


Joined: July 28, 2015
Posts: 646
Location: Missoula, MT
DwarfVader is offline 

PostPosted: Tue Mar 22, 2016 11:50 am    Post subject: Re: OEM Stereo Woes Reply with quote

chase4food wrote:
Merian wrote:
I wonder about the HiFi of a low bit rate xfer medium like Bluetooth...


Bluetooth specs has been in constant evolution. Countless features, functionality, and performance enhancements have been added since its early slow start. Do take note that technology like this always have to provide support for backward incompatibilities with legacy devices. It takes two to dance, so if one device cannot support the newer and better feature the operation will fall back on one that mutually support.

BT audio spec is very complicated. But the gist is there is a baseline mandatory CODEC that all devices must support, and many other optional CODECs with increased performance as well as implementation differences.

If your devices is relatively new - within the last few years, you should expect reasonable performance. Do note that most of these CODECs are lossy. From what I heard, Apple's Carplay has lossless audio CODEC support, though I can reasonably it is only both devices (source and sink) supports it.


Also it's dependent on what kind of Bluetooth your device (transmit or receive) can deal with... A lot of devices on the market meant to connect to your stereo are Bluetooth mono, as they are intended for phone calls only, making sure one has a Bluetooth stereo device is imperative.
_________________
- oderint dum metuant -

I'll find my van someday, or it will find me.
Back to top
View user's profile Send private message Visit poster's website Classifieds Feedback
ALIKA T3
Samba Member


Joined: July 30, 2009
Posts: 3722
Location: Honolulu,Hawaii and France
ALIKA T3 is offline 

PostPosted: Sat Feb 09, 2019 12:44 pm    Post subject: Re: OEM Stereo Woes Reply with quote

Hey there!

I too have a Heidelberg IV made in Japan by Matsushita.
Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


would like to install a 3.5mm Jack to listen to music, not using those inefficient fake cassettes.

I will prolly add Bluetooth too, for now just the jack.

I'm following the instructions on this site https://www.instructables.com/id/AUX-IN-and-Bluetooth-for-Every-Car-Casette-Player/


I need help identifying the integrated circuit OUTPUTS where I could solder my jack INPUT before disabling the said chip.

My stereo is older than the one in the article and is a marvel of old electronics combined with quality precision mechanics. I know nothing about electronics but I think I found 2 possible chips, not sure which one is the correct one to work with.

Wiring routing before disassembly:
Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Funny fact, there's a ladder switch below there to take power from the L&R output from the tape head to power the forward and rewind LEDs. When the plastic switch is pushed in on the circuit by some internal actuator, ground green has continuity with the red wire for the forward LED. Pulled out, green with blue in reverse.
Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

I
Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


So now I have 3 chips to choose from and I'm stuck at this stage and need help

Chip BA337, an integrated circuit, but located the furthest away from the connections of the tape head. It has 9 pins in a row.

Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Chip HA12047, a dip 18 integrated circuit made by Dolby. Pin 6 and pin 12 unused, not soldered. It's a noise reduction circuit, but that's Chinese to me. Located half way across that board.

Image may have been reduced in size. Click image to view fullscreen.


Then, this chip which I think might be the correct candidate, closest from tape head connections.
8 pins in a row. I followed the red ( right) wire from the tape head connection and the series of components, it lead me to pin#2. I'm not sure what to think now, the diagram says #1...
Part number LA3161


Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Cassette switches. These will need to be used to simulate the use of a cassette when playing from an auxiliary source.
Red and yellow have continuity when cassette in.

The ladder switch has the plastic portion pushed in. No cassette, continuity between blue and purple. Cassette in, continuity between blue and red. No continuity on forward & rewind
Image may have been reduced in size. Click image to view fullscreen.


Thanks for your help on the chip Wink
_________________
Silicone Steering Boots and 930 Cv boots for sale in the classifieds.
Syncro transmission upgrade parts in the Classifieds.
Subaru EJ22+UN1 5 speed transmission
http://www.thesamba.com/vw/forum/viewtopic.php?t=416343
Syncro http://www.thesamba.com/vw/forum/viewtopic.php?t=4...num+gadget
Back to top
View user's profile Send private message Gallery Classifieds Feedback
DigiMatrix
Samba Member


Joined: April 20, 2010
Posts: 96
Location: Up North Canada
DigiMatrix is offline 

PostPosted: Sat Feb 09, 2019 4:23 pm    Post subject: Re: OEM Stereo Woes Reply with quote

Hi Alika, I read the other article and based on that info, I bet that you want to connect to pins 3 and 6 of the la3161 chip (output side) of the amplifiers plus ground. Aloha and very nice meeting you yesterday! I appreciate you taking the time! If you are ever back Vancouver way, let me know, I'd like to repay the hospitality. Don
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
ALIKA T3
Samba Member


Joined: July 30, 2009
Posts: 3722
Location: Honolulu,Hawaii and France
ALIKA T3 is offline 

PostPosted: Sat Feb 09, 2019 6:06 pm    Post subject: Re: OEM Stereo Woes Reply with quote

Hi Don!

It was a great pleasure to meet you yesterday as well!
Indeed, you blew my mind with your electronics knowledge!

I also figured out my resistance problem Smile

They are all gonna be connected in series, just a parallel wire at the end of each resistance to a switch to close that particular loop of series to use it, only one switch ON at any time Smile

Aloha!
_________________
Silicone Steering Boots and 930 Cv boots for sale in the classifieds.
Syncro transmission upgrade parts in the Classifieds.
Subaru EJ22+UN1 5 speed transmission
http://www.thesamba.com/vw/forum/viewtopic.php?t=416343
Syncro http://www.thesamba.com/vw/forum/viewtopic.php?t=4...num+gadget
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Vanagon All times are Mountain Standard Time/Pacific Daylight Savings Time
Page: Previous  1, 2, 3
Page 3 of 3

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2020, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB