OEM MTS stereo wiring CR-101

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vØlvØfreak
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Re: OEM MTS stereo wiring CR-101

Post by vØlvØfreak » 14 Feb 2010 05:24 pm

trabitom99 wrote:
Chris_C wrote:Genuine Volvo battery... +10 BKV points.
That thing lasted at least 8 winters. I say "at least" because the car had it already, when I bought it in 2000 ... The replacement battery is already weakening after only 2 winters. Maybe I'll get another Volvo battery next time ?
Varta also is good. I have one in my 360, that one is from 2000. first 8 years in our 240 (only driving in de summer, and the rest of the year once a month). After it 1 time faled after 3 weaks, I've got it in my 360 witch now is resting in the garage for 1 year.. but if it is charged, the car still starts after 2 weaks! :shock:
trabitom99 wrote:
vØlvØfreak wrote:Haven't heart anything yet about the manuel of the radio... If i hear something from him, I'll let you know :wink:
Thanks for that! There are several buttons on that thing which confuse me totally ;-)

Just hit every button. In the worst case it will explode :lol:

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trabitom99
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Re: OEM MTS stereo wiring CR-101

Post by trabitom99 » 14 Feb 2010 06:37 pm

OK, the green wire is definitely the 12v feed for the radios memory. If it's not connected and you turn it on, it "forgets" the last station (and presumably the presets too).

Here we go :-)
http://www.youtube.com/watch?v=sX72O-xYO_A

Now here's the problem with the second radio. Everything wired up just as the first but when you turn it on:
http://www.youtube.com/watch?v=sa94U3g_emg

power is getting there, but the display stays dark and no sound other than static.

The same if you put a tape in:
http://www.youtube.com/watch?v=w1HPvmOsvxE

However if you connect the red cable for the amp / electric arial up to 12V+ everything lights up like a Christmas tree (the "working" MTS does this too).
http://www.youtube.com/watch?v=tO6VO6a2n7c

Any ideas? Both radios were wired up exactly the same way.

BTW the "working" radio has a cracked panel, so I thought I'd swap them over. Not easy, as the back lighting for the tape direction arrows is fixed into the back of the panel and I don't think I could get it out without destroying it. So ... if anyone's after one of these things, get one with the correct 300/700 type panel ;-)

Tom
343 GL Touring B14.1E CVT (155) 98000kms 1980 (sold)
343 L Junior B14.3E MT4 (155) 229000kms 1981 (scrapped)
343 DLS B19A MT4 (155) 167900kms 1982
360 GL Injection B200F MT5 (231) 348598kms 1988 (scrapped)
360 GLT B200F MT5 (302) 230000kms 1988

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Chris_C
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Re: OEM MTS stereo wiring CR-101

Post by Chris_C » 14 Feb 2010 09:21 pm

Tom, don't poke the amp wire anymore! Thats an output rather than an input, so isn't expect to suddenly see voltage ;)
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

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SteveP
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Re: OEM MTS stereo wiring CR-101

Post by SteveP » 14 Feb 2010 10:18 pm

Great progress Tom... I need to get me one of these :lol:
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
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trabitom99
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Re: OEM MTS stereo wiring CR-101

Post by trabitom99 » 15 Feb 2010 05:50 pm

Chris_C wrote:Tom, don't poke the amp wire anymore! Thats an output rather than an input, so isn't expect to suddenly see voltage ;)
I try not do do anything with the electrics in our house, I'd probably blow the place up :oops:
SteveP wrote:Great progress Tom... I need to get me one of these :lol:
The spare one was destined for you, but it's not looking good if I can't get it to work properly :-(

I didn't have much luck connecting the (working) radio to the car today. It switches on, but the station scan and the presets won't work. After fiddling with the wiring a bit I managed to blow a fuse :oops:

Thinking I'd damaged the radio, I connected it back up to the battery on the kitchen table, using that Heath Robinson arrangement of wires. No problem, everything worked as it should ... I double checked the connections to the car's loom but I can't see anything wrong. Maybe it's the cold, perhaps the 25 year old "microprocessing system" ;-) doesn't like sudden 20 deg drops in temperature ...

Tom
343 GL Touring B14.1E CVT (155) 98000kms 1980 (sold)
343 L Junior B14.3E MT4 (155) 229000kms 1981 (scrapped)
343 DLS B19A MT4 (155) 167900kms 1982
360 GL Injection B200F MT5 (231) 348598kms 1988 (scrapped)
360 GLT B200F MT5 (302) 230000kms 1988

macplaxton
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Re: OEM MTS stereo wiring CR-101

Post by macplaxton » 14 Apr 2011 02:21 am

Well Tom kindly sent me over the broken CR-101 to look at and I've got a little bit more life out of it.

First off the VOLVO CR-101 is also known as a Mitsubishi RX-250VQ and being an older (pre-1984?) radio, the FM band only goes up to 104.00. The later equivalent of it appears to be the CR-4061 (also has 4 speaker output, the CR-4041 is the 2 speaker stereo version). The CR-4060 and CR4040 respectively have a different fascia that fits the 200 series low-mount location and the hole in the > 82MY 300 series dash.

On closer inspection of the set, it looks like someone has been randomly attaching wires to a battery... :wink:

Going back to Tom's earlier observations,

1) Earthing the set negative with the black ground wire, and supplying the set with +12V using the blue supply wire, resulted in the cassette deck half of the lights powering up and the deck operating (but not fully tested). This is correctly wired.

2) Earthing the set negative with the black ground wire, and supplying the set with +12V using the red aerial/amp wire, resulted in the radio half of the lights powering up and the LCD showing a fixed 100.65 FM. Set would not seek. This is incorrectly wired.

The sub-board with the connector block on it had two burnt looking areas on the green solder resist
Image

Closer inspection showed that the PCB track in the left hand circle had a 2mm or so break in it.
Image

This was bridged and now the stereo powers up okay. Well, when initially turning on, it displays "100.00" briefly then settles at "U 87.50". I can get the tuner to operate up / down and seek. Runs fine through 87.50 through to 104.00 and back round again. All presets when selected are U 87.50.

I did have to solder the red front panel wire back to the tiny circuit board which lights up the tape direction arrows as it came adrift :oops:
Image

The front panel is connected by a small 3 pin connector block to the cassette deck sub assembly so is quite easy to remove.
Image
Image
Image

If i can get some more action out of the radio, I will probably change the cassette deck belts whilst I have it apart.
Image

This is the main board, which is visible when the bottom cover is removed.
Image

This is the amplifier board which is visible on the left hand side of the unit.
Image

This is something to do with the cassette deck on the right hand side of the unit.
Image

This is the front panel switches / LCD / radio button matrix with the buttons removed. The LCD works fine, despite some leakage on the left hand side.
Image

This is the top view of the unit with the cassette deck assembly removed. At the back are the power input board and the DIN sockets board (for an external amp and/or equaliser)
Image

Underneath the cassette deck is yet another board with the radio tuner/microprocessor.
Image

I can't find a datasheet for the 28-pin DIL NEC chip at the bottom of the board (IC05), it is a NEC D1701C, which is something like a PLL tuner chip.

Anyone got any instructions? Most of the buttons appear to work, but I don't get any response out of the U/M/L waveband switch. It just stays on FM. Can't seem to get the MEM button to do the memorising of the presets, but I could just be doing things in the wrong order. Anyone know what the "ER" and "CL" buttons do when they are at home? Didn't get any action out of these, but I don't know what to expect of them even if I could. :?

Cheers,
Rich
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trabitom99
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Re: OEM MTS stereo wiring CR-101

Post by trabitom99 » 14 Apr 2011 03:31 am

Ah, well done, glad you're getting further with the monster than I did :-) It'll be a great machine if you get it going.
macplaxton wrote:The later equivalent of it appears to be the CR-4061 (also has 4 speaker output, the CR-4041 is the 2 speaker stereo version). The CR-4060 and CR4040 respectively have a different fascia that fits the 200 series low-mount location and the hole in the > 82MY 300 series dash.

Anyone know what the "ER" and "CL" buttons do when they are at home? Didn't get any action out of these, but I don't know what to expect of them even if I could. :?
I've been doing some digging around and have come up with some dusty literature. You're right about **40/**60 being the versions for the older style dash, the difference between **41 and **61 however is the AVI decoding. 41's have a loudness button, 61's an AVI button instead. Both are for four speakers.

ER means "erase" and CL "clear".

I'll head for a photocopier tomorrow, and post some info your way ...

Cheers

Tom
343 GL Touring B14.1E CVT (155) 98000kms 1980 (sold)
343 L Junior B14.3E MT4 (155) 229000kms 1981 (scrapped)
343 DLS B19A MT4 (155) 167900kms 1982
360 GL Injection B200F MT5 (231) 348598kms 1988 (scrapped)
360 GLT B200F MT5 (302) 230000kms 1988

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Chris_C
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Re: OEM MTS stereo wiring CR-101

Post by Chris_C » 14 Apr 2011 12:28 pm

Great job MP :D

If it's of any use... I have the OEM 4 channel amp that goes with this. Found a c plated '60 GLE in the scrappy once and took the rear speakers, found the amp under the passenger seat but wasn't intelligent enough to take the DIN cable or headunit. I have got the pass through cable that the amp powers from off the top of my head though, it just has a male and female 9 pin radio connector so that it snadgers power and dumps output back to the speaker wires.

No idea where I put it though...
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

macplaxton
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Re: OEM MTS stereo wiring CR-101

Post by macplaxton » 14 Apr 2011 05:45 pm

trabitom99 wrote:I've been doing some digging around and have come up with some dusty literature. You're right about **40/**60 being the versions for the older style dash, the difference between **41 and **61 however is the AVI decoding. 41's have a loudness button, 61's an AVI button instead. Both are for four speakers.
Sorry, I was relying on dodgy information at http://www.volvo200.org/accessoires/soundsystem.htm :oops:
trabitom99 wrote:ER means "erase" and CL "clear".
Erase what? Clear what? You've just confused me more :? :?
trabitom99 wrote:I'll head for a photocopier tomorrow, and post some info your way ...
Ta, as long as customs don't seize Volvo radio porn. :lol:
Chris_C wrote:Great job MP :D
Not really, I'm a bit shite at electronics but I can usually wire things up without blowing myself up. Last time I fixed a radio was about 4 years ago (A Bush TR130) It was only a case of desoldering all the screen leads from the seven AF116 transistors on the board.
Chris_C wrote:If it's of any use... I have the OEM 4 channel amp that goes with this.....No idea where I put it though...
Whenever it turns up then, whenever it turns up. I suppose I should keep 'em peeled for:

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macplaxton
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Re: OEM MTS stereo wiring CR-101

Post by macplaxton » 16 Apr 2011 11:23 am

Weird behaviour now from the radio :?

Following some button combination pressing. The radio is now doing this:

Display reads U 87.50 at start-up. Scans (or steps) up to U 99.95, then the display changed to small V above the U and goes from v 0000 to 0400 in steps of 5. Then back round to 87.50. Not quite sure what exact combination of button(s) was pressed to get it into this mode, but it stays that way between removing the power and restarting.

I'll post a clip of it later.
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trabitom99
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Re: OEM MTS stereo wiring CR-101

Post by trabitom99 » 17 Apr 2011 01:13 pm

Is the avi button turned off? They switched that traffic service off a few years ago, if youve got it switched on, it wont find any signal.

I ve got a working MTS in my daily since yesterday, but havent sussed it completely yet.

Tom
343 GL Touring B14.1E CVT (155) 98000kms 1980 (sold)
343 L Junior B14.3E MT4 (155) 229000kms 1981 (scrapped)
343 DLS B19A MT4 (155) 167900kms 1982
360 GL Injection B200F MT5 (231) 348598kms 1988 (scrapped)
360 GLT B200F MT5 (302) 230000kms 1988

macplaxton
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Re: OEM MTS stereo wiring CR-101

Post by macplaxton » 17 Apr 2011 01:43 pm

The AVI is turned off.

Worked out how to save a preset yet? :?

Strange tuner behaviour http://www.youtube.com/watch?v=jNYKAs4lfns
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82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

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trabitom99
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Re: OEM MTS stereo wiring CR-101

Post by trabitom99 » 17 Apr 2011 02:39 pm

No, not yet ... Have 200kms to drive this eve, will try and figure it out then ...

Tom
343 GL Touring B14.1E CVT (155) 98000kms 1980 (sold)
343 L Junior B14.3E MT4 (155) 229000kms 1981 (scrapped)
343 DLS B19A MT4 (155) 167900kms 1982
360 GL Injection B200F MT5 (231) 348598kms 1988 (scrapped)
360 GLT B200F MT5 (302) 230000kms 1988

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trabitom99
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Re: OEM MTS stereo wiring CR-101

Post by trabitom99 » 17 Apr 2011 08:41 pm

Right, these things seem to have an "MTS mode" and a "normal mode". In "normal" (MTS not showing in display) you set the presets by tuning to the station, pressing Memory, then the preset button, then memory again. Easy.

But then there's MTS mode (rumored to be an RDS predecessor?) which you get into, if you press ... ? That's right: MTS. Then you get all those funny FFFFF readings when pressing the presets. CL and ER have something to do with it to. I couldn't get my head round it, at least, not safely while driving ;-) To get out of the weird MTS mode, you press the waveband button U/M/L

It has a nice sound, slightly better than my previous CR-306x, but could definitely do with a 4x20W amp and some rear speakers.

Looks great in the dash, particularly at night :-)

Tom
343 GL Touring B14.1E CVT (155) 98000kms 1980 (sold)
343 L Junior B14.3E MT4 (155) 229000kms 1981 (scrapped)
343 DLS B19A MT4 (155) 167900kms 1982
360 GL Injection B200F MT5 (231) 348598kms 1988 (scrapped)
360 GLT B200F MT5 (302) 230000kms 1988

macplaxton
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Re: OEM MTS stereo wiring CR-101

Post by macplaxton » 17 Apr 2011 09:02 pm

Cheers Tom. Seems straightforward enough.

Don't get MTS in the display at all though.

I do get very feint sound from the unit when it's tuned into a FM station or the tape is turning, so something connecting or in the power amp stage isn't working properly (as well as the rest of the issues)
72 DAF 44 Estate 78 Volvo 343DL Black BeautyImageImage
82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

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