CD100 (G and H) audio question

[DLinkOZ]

While I sort out the cd players, I want to keep testing the other systems and keep any necessary repairs concurrent, not fix one thing then find another and prolong time for total repair.  So I'd like to verify the audio system on them.  Is it safe to connect an external audio source, via RCA, in place of the cd player?

[DLinkOZ]

I used a headphone jack to RCA adapter, and connected my phone to the CD input of the amp.  Volume is extremely low.  Per other threads, I verified that the volume knob is properly wired (red to the jumpered connector, black comes down with the cancel button to the amp).  I checked for continuity between the volume button and the respective wires at the volume control connector at the amp, everything checks out good.  The volume knob does work, sort of - it modified volume from nothing to almost nothing.  Including a pic of the relevant parts, any ideas?

[DLinkOZ]

I also pulled the crossover board, and all the solder joints look good.

[jdemarti]

The reason why tyou have no sound is because the mute circuit is activated. You mute (orange/black) wire going to the Mech Controller is shorted causing the amp to mute. If you pull that wire out of the mech controller it should deactivate the mute.

[DLinkOZ]

That's exactly what it was!  I had to completely disconnect power to the cd unit, as without that switch it never indexed and kept loading/unloading as it wasn't activating.  But with that, music from my phone plays loud and clear, and sounds very good.  Much appreciated!

[DLinkOZ]

With the OP coming in on Friday, I began the task of moving it upstairs.  I got to the base of the stairs, gave up and am looking to hire a company to do it for me

[DLinkOZ]

$100 to three big burly guys, 10 minutes and the big pig was magically upstairs in my game room.

[DLinkOZ]

Thanks to the new OP assemblies from jdemarti, I've got the upstairs juke happily playing music.  Bonus is that it even plays discs that I'd burned back to audio cd from MP3 (10 years ago I ripped all my discs to MP3, and subsequently lost most of them!).

Downstairs is a different story, and I hope someone can help out.  New optics in, went without a hitch.  But the sled motor has issues.  I used one from one of the new assemblies, thinking maybe the output shaft wasn't properly engaging the little motor, but that made no difference so it must not be the motor itself.  When I power the unit on, I hear it spinning, but the sled never moves.  I can manually rotate the shaft coming out of the motor, and the sled moves with no binding or force.  I moved the cdpro assembly to the upstairs juke, and it experienced the same problem.

[DLinkOZ]

It's actually the OP itself vibrating and making noise, not the motor.  When I turn on power, it sinks down just a bit makes a whirring noise, but the sled never moves.  Possibly the controller board on the bottom of the cd player unit (CD-PRO)?