Ok, I obey You folks and here's a new little thread about the Clarion radio. I decided not to spoil my build/repair thread (cj7-czech-small-build-repair-thread) with it...
Here's the thing:
I absolutely adore this crappy radio, I feel that it belongs to my CJ. It has digital 8-segmented display and yet looks retro enough to take part in some old school tv series ride. I think it's made in Japan.
There were rotten drive belts in cassette player. We bought O-rings in town, because rubber band is no good)), I put them in place and I took cassette drive for a spin with stabilized power source, which was splendid until something smoked from the eastern part of the radio and it turned no more. Later I discovered, that one little gear was completely jammed(no relation with the smoking though). I found some hidden straws and I wouldn't be surpriced if water had settled there for some time (Due to recent discovery of mud in top engine harness from previous owner...no relation as well). So I lubricated each and every moving part. But the motor wouldn't spin. I always connect the power source this way: Minus pole to radio chasis and Plus pole to the cable which is supposed to be power from ignition. When I connect 12V directly into the electric motor, it runs fust fine.
there is the drive:
At first the motor was spinning for quite some time, but It wouldn't FF nor RW (That would be the stuck tooth wheel). Evry once in a while electromagnet would trigger. Now, when I think about it, it may trigger beacause the motor had to much of a resistance from the bigger o-ring, it is 2mm thick and a bit tight. Anyway, there was some smoke and I saw a glare in one particular area.
I took a multimeter and applyed my knowledge of Ohm law and discovered one component, which limites power supply to the motor. Instead of 13V there is about 5.5V...which doesn't add up. And the solenoid for play-back trys to move every 3 seconds. But I don't know in which direction. When I extend it all the way up by my hand and then connect it to power supply it snaps like it should, but nothing else. The trying of the solenoid is recognizable by ear(bzz) and by voltage reduction.
So I melt this suspicious part away. It pretends to be a rezistor, but I don't trust it. I will guess it is fuse of some kind. For the motor I mean. It is sly green whereas other rezistors are striped as usual. When I short out the resistor poles the motor starts to spin, which is good, but the odd knocking by the solenoid is still the same(Before the glare it kicked hardly all the way in and out as it should-it slides the magnetic reader head and the wheels-usual stuff). So I guess I will have to investigate a bit further.
here's how the "rezistor" looks like(it reads "I B J" over the "2 2ohm" but multimeter says 47ohms and it reduces the voltage dramatically):
Next thing I'm not sure of is this electric part right under the small shaft:
It is located under both gears for rotatating cassette spools. It seemed to me as it could be LED diodes, but why in that spot?...it does not make any sence and no current seem to bring them to life.
Thanks for any comment You can spare!
Here's the thing:
I absolutely adore this crappy radio, I feel that it belongs to my CJ. It has digital 8-segmented display and yet looks retro enough to take part in some old school tv series ride. I think it's made in Japan.
There were rotten drive belts in cassette player. We bought O-rings in town, because rubber band is no good)), I put them in place and I took cassette drive for a spin with stabilized power source, which was splendid until something smoked from the eastern part of the radio and it turned no more. Later I discovered, that one little gear was completely jammed(no relation with the smoking though). I found some hidden straws and I wouldn't be surpriced if water had settled there for some time (Due to recent discovery of mud in top engine harness from previous owner...no relation as well). So I lubricated each and every moving part. But the motor wouldn't spin. I always connect the power source this way: Minus pole to radio chasis and Plus pole to the cable which is supposed to be power from ignition. When I connect 12V directly into the electric motor, it runs fust fine.
there is the drive:
At first the motor was spinning for quite some time, but It wouldn't FF nor RW (That would be the stuck tooth wheel). Evry once in a while electromagnet would trigger. Now, when I think about it, it may trigger beacause the motor had to much of a resistance from the bigger o-ring, it is 2mm thick and a bit tight. Anyway, there was some smoke and I saw a glare in one particular area.
I took a multimeter and applyed my knowledge of Ohm law and discovered one component, which limites power supply to the motor. Instead of 13V there is about 5.5V...which doesn't add up. And the solenoid for play-back trys to move every 3 seconds. But I don't know in which direction. When I extend it all the way up by my hand and then connect it to power supply it snaps like it should, but nothing else. The trying of the solenoid is recognizable by ear(bzz) and by voltage reduction.
So I melt this suspicious part away. It pretends to be a rezistor, but I don't trust it. I will guess it is fuse of some kind. For the motor I mean. It is sly green whereas other rezistors are striped as usual. When I short out the resistor poles the motor starts to spin, which is good, but the odd knocking by the solenoid is still the same(Before the glare it kicked hardly all the way in and out as it should-it slides the magnetic reader head and the wheels-usual stuff). So I guess I will have to investigate a bit further.
here's how the "rezistor" looks like(it reads "I B J" over the "2 2ohm" but multimeter says 47ohms and it reduces the voltage dramatically):
Next thing I'm not sure of is this electric part right under the small shaft:
It is located under both gears for rotatating cassette spools. It seemed to me as it could be LED diodes, but why in that spot?...it does not make any sence and no current seem to bring them to life.
Thanks for any comment You can spare!