Club-S12 International S12OC United Kingdom ClubS12 France S12Silvia Australia S12.org.ua Eastern Europe S12 of Sweden S12 Japan BBS
Please login or register.

Login with username, password and session length

Author Topic: OEM Radio w/ Piggy back Cassette Deck Woes  (Read 875 times)

Offline SC S12

OEM Radio w/ Piggy back Cassette Deck Woes
« on: 08:44:40 AM / 04-Feb-15 »
recently i have been having troubles with various CD players either loosing their FM tuners, or having the CD tray stop functioning.

I finally opened up my stock radio and fixed the few cold solder joints, getting the head unit functional again. I have a two fold question I suppose, and though I searched around here, google, and s12silvia i turned up pretty much nothing related.

     1. The stock piggyback cassette deck is more or less non functional. As soon as power is delivered to it, the play indicator lights up even if there is not a tape in it. Putting a tape in is an exercise in futility as it goes in, gets captured, but the deck will not drop down onto the rotor heads. Sadly it will not release the tape either, so you have to take the entire deck out, and take it apart to get the damn cassette out. Does anyone happen to know the whereabouts of the Clarion Service manual for our cars units ? (if anyone has a working one with a nice faceplate, shoot me a PM if you want to sell it)

     2. In light of the issue and the unlikely event that it can be fixed, i was wondering if anyone knew the pin out/in on the 5pin Din that the cassette deck uses to plug into the head unit? Is it a standard midi pin out, or a home audio/receiver pin out ? I tried testing my deck, but since i cant actually get a tape to play i cant determine whats the shared pin, or the left and right output pins. Just wondering since a number of cruiser type road bikes use a 5p Din input/output from their stock radios, there are adapter plugs that go right to a 3.5mm stereo jack to use a media player with them.

Facebook Share    

Beam me up Scotty,
There is no intelligent life down here


Follow the Link to New Fast http://club-s12.org/v3/index.php?topic=32213.0

Offline weitrhino

  • Full Member
  • ***
  • Location: North Texas
  • Posts: 379
  • Vehicle: 1985 Nissan 200SX
  • '85 Notch with just 34k miles! RIP '86 Notch
    • Blue Mouth Promotions LLC
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #1 on: 02:45:33 PM / 03-Mar-16 »
It's been just over a year. Did you ever figure out anything on the pinouts? I've been thinking about wiring in an old portable CD player or making an iPod adapter.

Offline weitrhino

  • Full Member
  • ***
  • Location: North Texas
  • Posts: 379
  • Vehicle: 1985 Nissan 200SX
  • '85 Notch with just 34k miles! RIP '86 Notch
    • Blue Mouth Promotions LLC
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #2 on: 04:55:29 PM / 12-Jun-16 »
I now have this info.

Can you share the cassette deck part numbers?

Offline Nebuchernezzer

  • Sr. Member
  • ****
  • Posts: 1,351
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #3 on: 08:53:31 PM / 14-Jun-16 »
Can you share said info?
Not having to use a radio tuner style intercept to put my phone music onto the head unit would be great!

If looks could kill you'd have eyes like cyanide...
http://www.cardomain.com/id/zeruel

Offline weitrhino

  • Full Member
  • ***
  • Location: North Texas
  • Posts: 379
  • Vehicle: 1985 Nissan 200SX
  • '85 Notch with just 34k miles! RIP '86 Notch
    • Blue Mouth Promotions LLC
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #4 on: 10:15:24 AM / 15-Jun-16 »
I'm working on this and need some time to perform a few experiments first but that's the goal: iPod input to the factory radio. It would still be helpful to have the model number of the OEM cassette option.
« Last Edit: 10:16:23 AM / 15-Jun-16 by weitrhino »

Offline weitrhino

  • Full Member
  • ***
  • Location: North Texas
  • Posts: 379
  • Vehicle: 1985 Nissan 200SX
  • '85 Notch with just 34k miles! RIP '86 Notch
    • Blue Mouth Promotions LLC
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #5 on: 07:41:23 PM / 29-Oct-16 »
So finally today I did some experimenting with sending iPod signal into the OEM radio. I had the cassette deck option in my first S12. When the radio was on and a cassette was inserted the radio would mute and the power antenna would retract, then the cassette deck output was controlled through the head unit. Eject the tape and the radio signal would return, antenna would rise to its previous setting.

Below is a scan from the OEM radio service manual. Now I'm not an electronics genius and have only basic schematic knowledge but I figured jumping pins 1 and 2 would duplicate the condition of inserting a cassette; mute the radio and retract the antenna. If you look at the bottom left of the image you'll see a 5-pin DIN labeled "FOR DECK." Pins 1 and 2 appear to control voltage going into and coming from the cassette deck. Pin 3 is ground and pins 4 and 5 are L+R inputs. Simple, right?

When I jumped 1 and 2 the antenna did indeed retract and the radio muted but there was no sound from my iPod when inserted on pins 4 and 5 from the headphone jack. I have been unable to reverse this and get radio sound or antenna control again. Before, simply ejecting the cassette restored normal radio but pulling the jumper did not restore radio.

Have a read of the schematic. Anyone else have a different take?


Offline Nebuchernezzer

  • Sr. Member
  • ****
  • Posts: 1,351
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #6 on: 06:54:55 PM / 30-Oct-16 »
Do you also have a diagram of what those pins go to in the cassette unit?
You would need to connect the signal ground too wouldn't you? Into pin 3?

If looks could kill you'd have eyes like cyanide...
http://www.cardomain.com/id/zeruel

Offline deucekazoo

  • n00b
  • **
  • Location: Central IL
  • Posts: 86
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #7 on: 07:33:17 AM / 31-Oct-16 »
I agree, the signal ground should be your left and right channel grounds.

Offline weitrhino

  • Full Member
  • ***
  • Location: North Texas
  • Posts: 379
  • Vehicle: 1985 Nissan 200SX
  • '85 Notch with just 34k miles! RIP '86 Notch
    • Blue Mouth Promotions LLC
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #8 on: 10:53:16 AM / 31-Oct-16 »
I took this as understood but I had pin 3 connected to signal - when signal + was inserted into 4 and/or 5. I'm more concerned now with reversing the radio mute and restoring antenna function.

Offline deucekazoo

  • n00b
  • **
  • Location: Central IL
  • Posts: 86
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #9 on: 12:17:56 PM / 31-Oct-16 »
I looked at it a little more and now I understand what you are saying. It looks like pin 2 is full power from the radio. Once the radio is turned on the deck is turned on. Pin 1 is your deck power. Once this signal is turned on then the deck should play. Just take the signal off of pin 1 and see what happens. Keep pin 2 connected.
Also I know that iPods output at 1v max. This might not be enough to hear depending on what the voltage input is from the tape deck. If its looking for a 5v signal then you might have to turn the radio up all the way to hear something.

Offline SC S12

Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #10 on: 10:17:14 AM / 05-Jan-17 »
It's been just over a year. Did you ever figure out anything on the pinouts? I've been thinking about wiring in an old portable CD player or making an iPod adapter.

I never did resolve the issue and ended up getting a Pioneer Head Unit to replace the stock ones.

I had taken the stock radio apart like 10 times to clean contacts/tuning pots, fix cold solder joints, and most recently the LCD has started to bleed and its nearly unreadable.
I have multiple stock radios all with differing issues (one randomly powers off/on, another clicks and pops really badly anytime you even touch it, another still refuses to output anything to the front drivers speaker)
This "upgraded" model had a lot of issues and was recalled a few times by Nissan/Clarion. My car had the HU replaced in 1986, 1987, and 1989.

The model that had the Cassette deck integrated in with a smaller internal amplifier seems to always work without issue, So maybe sourcing one of those is a better option if you wish to retain a factory look.



There are 5pin DIN to Stereo 3.5mm jacks that are used on some mid 90's Grand Touring Motorcycles that should allow an aux input into the stock stereo. The main concern i would have with this is i think it would significantly overdrive/saturate the input and might end up killing the head unit in the long term. (think trying to use a phonograph input on a home stereo as an Aux input, even on the lowest volume you can set on your device its still over driving and clipping.)

The other result of this is as deuce said : it may be expecting higher input, and the few mV that goes from a standard PMP device is just not going to do much of anything.
Beam me up Scotty,
There is no intelligent life down here


Follow the Link to New Fast http://club-s12.org/v3/index.php?topic=32213.0

Offline weitrhino

  • Full Member
  • ***
  • Location: North Texas
  • Posts: 379
  • Vehicle: 1985 Nissan 200SX
  • '85 Notch with just 34k miles! RIP '86 Notch
    • Blue Mouth Promotions LLC
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #11 on: 10:16:56 PM / 05-Jan-17 »
I never knew there were 5 pin DIN to 3.5mm cables so I began searching. Seems to me the 5 pin arrangement on all the cables I see is different than on the Clarion head. Moreover, the pins look much fatter but it's hard to tell just by pictures.

Maybe one day a cassette unit with a decent faceplate will turn up.

Offline kelso840

Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #12 on: 08:00:52 AM / 06-Jan-17 »
My "Loud" button and display don't work on my Clarion unit, so I was planning on pulling that out again soon to see if I can find a fix. I'll pick up one of these cables and see if I can make some noise.

https://www.amazon.com/kenable-3-5mm-Stereo-Audio-Cable/dp/B0053O6CSW
Infrequently driving an s12.

Offline Nebuchernezzer

  • Sr. Member
  • ****
  • Posts: 1,351
Re: OEM Radio w/ Piggy back Cassette Deck Woes
« Reply #13 on: 05:51:54 AM / 08-Jan-17 »
Interesting!

If looks could kill you'd have eyes like cyanide...
http://www.cardomain.com/id/zeruel