Onix CD-1----Play, no tray

[jbeckva]

Yep.. pin 5 too .. no juice in, none out eh?

 

[Gepetto]

The supply voltage could be as low as 5V on pin 5 Lee depending on the tray motor type used.

 

[jbeckva]

And BY the WAY.. you were "out of uniform", sir Lee... I "fixed" that..

 

[speakerman1]

I do have the things to remove an IC if you need it. I have no need for them. Monday is my payday. So I may ship some things.

Larry

 

[laatsch55]

Damn- a whole herd of ya standing by to help and I went to sleep, sorry guys, dropped the ball there eh?? Got a call back to the field guys, got a workover rig in a bind. Later, but not too, I hope.

 

[laatsch55]

Thanks Larrt.

 

[Gepetto]

Figured that Lee, we got tired of listening to the snoring, it was ruining the signal to noise ratio on our WOPL amps

 

[laatsch55]

Aw Jeez.............

 

[laatsch55]

Ok mI'm ready. Checking pins 9,12 with ground referenced at 10. When progressing through thge open/close routine pin 12 does the "GO HIGH" Go Low thing but only for a 1/2 second or so. Getting a good reading on the limit switch. I don't think it's staying hi long enough to trip the limit switch, or get moving at all for that matter. Looks like only 2 volts though.

 

[jbeckva]

Ok mI'm ready. Checking pins 9,12 with ground referenced at 10. When progressing through thge open/close routine pin 12 does the "GO HIGH" Go Low thing but only for a 1/2 second or so. Getting a good reading on the limit switch. I don't think it's staying hi long enough to trip the limit switch, or get moving at all for that matter. Looks like only 2 volts though.

Ok, how much volts ya got between pins 5 and 10? Also watch the same reading there when you hit the button.. does it drop at all?

 

[laatsch55]

It goes high with an increase of about 1 volt, but it has a steady 1 volt going through it also.

 

[laatsch55]

Excuse me 6 shows a low/hi with button actuation. 5 shows a constant 2 volts and no increase or decrease with button.

 

[jbeckva]

So without doing anything, it's only 1 volt at pin 5???

If so, there's your problem.. that is supposed to be fed directly from the 5volt (or whatever it should be) power supply rail. So either the 5 volts are missing or the chip itself is shorted Vp to ground and is pulling down the normal voltage there.

Hmmm.. might not be 5 volts either, at least NOT the same 5 volts that would be supplying the digital/control side - if that was the case chances are you'd see a LOT more symptoms.

In any case, that pin 5 is where the main "juice" is supposed to be fed into the chip. I doubt it should be 1v and definitely not something that actually "changes".

 

[laatsch55]

OK, can I put the fluke on it or is that a no-no??

 

[jbeckva]

Excuse me 6 shows a low/hi with button actuation. 5 shows a constant 2 volts and no increase or decrease with button.

Ok.. yeah.. 2 volts on Vp (aka pin 5). I don't think that's "good". It should be higher than that. Prove it by supplying just 2 volts to the motor itself - can it actually MOVE with just 2 volts or is that too little?

 

[laatsch55]

At 5 v/div it's reading right at 5 volts and does not change.

 

[jbeckva]

OK, can I put the fluke on it or is that a no-no??

Yep, absolutely... (power off first tho, of course.. )

Or.. desolder and lift it temporarily.. then remeasure to see if the 2 volts jumps up.

 

[laatsch55]

6 is reading 2-1/2 constantly and only a 1/4-1/3 volt bump with button pushing.

 

[jbeckva]

At 5 v/div it's reading right at 5 volts and does not change.

So ok.. with the fluke.. red to pin 5, black to pin 10.. DCV, what do you have?

 

[jbeckva]

6 is reading 2-1/2 constantly and only a 1/4-1/3 volt bump with button pushing.

eeeh??

You said this earlier -

Excuse me 6 shows a low/hi with button actuation. 5