baddboybill
Boomus Fidelis
Wish I still had mine apart as I was working on deck last week. I am getting an M90 for restoration tomorrow and will work on this weekend. I'm wondering if solenoid has issue 
Bad Boy Bill
Bad Boy Bill
M90 deck help ! (continually clicking)
- Thread starter docs
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Yes solenoid can move in freely and springs back out freely. The diode does test out good, only get an ohm reading the right direction.
Pushing in the tab for cassette presence stops the motor and hence the clicking. Releasing it again starts it off on its continuous cycle again.
Pushing in the solenoid stops it too but it does not restart unless I manually move the gear to reset it.
Pushing in the tab for cassette presence stops the motor and hence the clicking. Releasing it again starts it off on its continuous cycle again.
Pushing in the solenoid stops it too but it does not restart unless I manually move the gear to reset it.
baddboybill
Boomus Fidelis
Yes solenoid can move in freely and springs back out freely. The diode does test out good, only get an ohm reading the right direction.
Pushing in the tab for cassette presence stops the motor and hence the clicking. Releasing it again starts it off on its continuous cycle again.
Pushing in the solenoid stops it too but it does not restart unless I manually move the gear to reset it.
So while deck is hooked up and powered up can you see the solenoid and what it's doing without tab pushed in? And what does it do when you hold in solenoid?
Bad Boy Bill
Pushing in the tab for cassette presence stops the motor and hence the clicking. Releasing it again starts it off on its continuous cycle again.
Pushing in the solenoid stops it too but it does not restart unless I manually move the gear to reset it.
So while deck is hooked up and powered up can you see the solenoid and what it's doing without tab pushed in? And what does it do when you hold in solenoid?
Bad Boy Bill
Alberto
Member (SA)
Hey Bro, why don't you try the most easiest thing first. I am an electrician and work with magnetic lighting contactors all the time. Alot of times they don't pull in all the way and just shatter,and it's doing that because magnets and plunger are dirty. Sometimes we just bang on them and the shattering stops and then we clean the magnets and plunger and it's working great again. If you can just remove the plunger and give it a good cleaning and clean magnets inside the solenoid with Q-tips.
Alberto
Member (SA)
Plunger in the solenoid is pulled in by current passing around magnets creating a magnetic field making the plunger pull in ( energized state ). when current is removed the solenoid goes into its normal de-energized state. The direction of the plunger spring tension is the normal de-enerized state/position. When the solenoid is energized it compresses the plunger spring and pulls the plunger in and is in the energized state/position.docs said:
When all powered up and not touching anything, the solenoid does not get pulled in, it barely moves at all.baddboybill said:
If I push the solenoid in the repetition stops, I can then let it go and it remains stopped.
The only way to reset again is to manually move the gear by hand.
When it is in this state I don't think anything works though I need to test this by connecting the controls back up.
BoomboxLover48
Boomus Fidelis
Hmmm.....is the gear wheel tight to the axle?... just a dumb qn? ..any play/gap..? I feel like the gear wheel assembly is the culprit here..
the solenoid action is either "yes" or "no" ..unless the plunger is so gummed up.... and haven't seen anything in between... never came across a weak solenoid so far.. I got so many of those solenoid action types of decks in my collection.
the solenoid action is either "yes" or "no" ..unless the plunger is so gummed up.... and haven't seen anything in between... never came across a weak solenoid so far.. I got so many of those solenoid action types of decks in my collection.
baddboybill
Boomus Fidelis
When all powered up and not touching anything, the solenoid does not get pulled in, it barely moves at all.
If I push the solenoid in the repetition stops, I can then let it go and it remains stopped.
The only way to reset again is to manually move the gear by hand.
When it is in this state I don't think anything works though I need to test this by connecting the controls back up.
You may have to press stop on keypad because it was already in a play mode. But I'm not really sure. Only thing I'm certain about is when you power up boombox the solenoid is suppose to pull pin shaft in and keep there until play is pressed. Like the guys said the inside of solenoid might be gunked up causing the magnetism to be to low to pull in shaft. I recommend taking solenoid out and pulling shaft out and cleaning both inside of solenoid walls and outer shaft and see if this helps
Bad Bad Bill
If I push the solenoid in the repetition stops, I can then let it go and it remains stopped.
The only way to reset again is to manually move the gear by hand.
When it is in this state I don't think anything works though I need to test this by connecting the controls back up.
You may have to press stop on keypad because it was already in a play mode. But I'm not really sure. Only thing I'm certain about is when you power up boombox the solenoid is suppose to pull pin shaft in and keep there until play is pressed. Like the guys said the inside of solenoid might be gunked up causing the magnetism to be to low to pull in shaft. I recommend taking solenoid out and pulling shaft out and cleaning both inside of solenoid walls and outer shaft and see if this helps
Bad Bad Bill
Visiting this again.
The deck no longer continually clicks after some work on the gears int he deck.
I've replaced two fusible resistors which were toast.
When powered now, no cyclic reset function takes place nor do any of the buttons work. The multi music scanner buttons work and the lights work.
Solenoid is clean as a whistle.
The deck no longer continually clicks after some work on the gears int he deck.
I've replaced two fusible resistors which were toast.
When powered now, no cyclic reset function takes place nor do any of the buttons work. The multi music scanner buttons work and the lights work.
Solenoid is clean as a whistle.
BoomboxLover48
Boomus Fidelis
Beosystem10
Member (SA)
docs said:
BoomboxLover48 said:
Was that a "before & after" or does that mean that it still won't run?
BoomboxLover48
Boomus Fidelis
This is a mechanical problem for sure.... my guess!
I've revived many other decks that fully stop by correcting a leaf switch or a mechanically driven switch..
Zener diodes....also .. can cause big problems....can totally stop it...
I've revived many other decks that fully stop by correcting a leaf switch or a mechanically driven switch..
Zener diodes....also .. can cause big problems....can totally stop it...
Replaced D701 and I now have good voltages at Q701 with 7v at emitter.
Deck is still not self test cycling at power on. I can manually move the flywheel and it will play a tape albeit slow. 11.2v at the motor when it does this. Clicking the solenoid manually stops the deck again.
Deck is still not self test cycling at power on. I can manually move the flywheel and it will play a tape albeit slow. 11.2v at the motor when it does this. Clicking the solenoid manually stops the deck again.
After replacing above diode with above link, the deck seems to now do a cyclic check on power up. Upon placing a cassette into the mechanism it seems to try to auto play but only getting half way. On moving the flywheel manually it begins to play. Pressing stop does stop the tape playing but it then tries to auto play again thus leaving the buttons inoperable while it is in this weird inbetween stage. Getting there but seems there are more faults with this !docs said:
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