ROWE/AMI CD 100 questions Thanks in advance!

scott c 2

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Restoring a CD 100A Juke and have a few questions:

I am replacing the Amp output transisters...what is that white greese looking stuff and what is it for under them connecting to the heat sink and how should I install the new ones?

How does the juke keep memory when powered down and unplugged. How long can it be powered down and save memory?


Speaker wires...what is the difference between hooking them to E7 or E6 on both channels and which do you use and why in home?

How do you know if a crossover isn't working correctly? How do they fail?

What are the 2 Power transistors 2N6055 for in the main power supply where the cord comes into the Juke? They are not wired to anything...just have connectors.


And the last question. I did a reprogram of the Juke entered "30" and hit popular and only inserted 1 disk. It took a while 40 minutes or so but it seemed to never stop going thru the empty slots. I enter a song from that disk and it works fine....I enter another disk and it says not available. But if nothing is entered it stops at locations without disks and picks nothing up loads it and the tries to read nothing....
Is this some sort of mode that automatically plays disks if none were entered? and why would it go to empty slots to search disks it knows are not there.


THANKYOU!
 
I can only answer one of those but I'm a fairly new owner.

When you hit 30 popular, it will play all songs off disc 30 in random order.
 
The white stuff is heat sink compound, applied to improve heat dissipation of the transistor. If there was a clear piece of plastic insulation stuck to the transistor or if one came with the new one, make sure you replace it.

Memory is kept by a battery in the central control computer. A good one will last for many months without the jukebox being powered up.

E7 gives more power to the speakers than E6. Either one at full volume will give you more sound than you will ever need in a home environment.

Crossover is generally pretty bulletproof. Just be sure the connectors on the ends of the wires are installed straight and not shorting to an adjacent tap.

No idea on the transistors.

I presume you used function 30 in programming mode to program all the slots, so it looked for a CD in every one. As a shortcut, use function 32 for programming. You can then step through the CD numbers and simply enter the number of tracks for each slot. Enter zero zero for the empty slots. Yes, there is an autoplay function with a lot of options.

Although it will tell you a CD is missing when you make a selection, it may still try to find them when autoplay is active.

If you have the manuals, everything regarding programming and sound hookup is in them. If you don't have them, get them, or you will spend forever working on it.
 
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Doughbroz...Thank you for the answers you provided. Now I guess I should find out where to get the heat sink compound.....wonder if the Home D. carries it?

Is the CCC battery replaceable?

Transistors in the power supply have me stumped. They are shown in the manual but I couldn't see where they were wired in the schematics....

I just got a copy of the manual...so I need to read up now. THANKS for the help!
 
I can only answer one of those but I'm a fairly new owner.

When you hit 30 popular, it will play all songs off disc 30 in random order.

Thanks for the response. I had it in service mode which means 30 popular would go into a full 100 CD program mode.
 
Electronic parts stores, maybe even Radio Shack should have the heat sink compound. I have replaced plenty of monitor transistors, but none in amplifiers, so I don't know if any adjustments have to be made to the amp after replacing them. It would be wise to let one of the amp gurus on this forum help you with that. The CCC battery is soldered to the board. It doesn't have to be the same body style as the original, as long as it meets the voltage requirement and is rechargeable. I'm wondering if yours is actually dead, because if it is I think you would be having a problem getting the juke to play when you first power it up. Play it a while, turn the power off overnight, then turn it on and check something like the most popular play audits (function 17 and 19). If they are valid, then the battery is good. Of course, if you look at the battery and it is starting to corrode, then by all means replace it.
 
Thanks for the response. I had it in service mode which means 30 popular would go into a full 100 CD program mode.

My bad. Out of service mode iy you hit disc # then popular, it will play all the songs off that disc in random order.
 
Transisters in power supply.

Still haven't found out what the two transisters on the power supply are for. They were not wired to anything. Just have connectors on the wires. My PS board doesn't have a place to connect them too so maybe the board is an upgrade or something....?

I am thinking maybe overseas voltages????
 
You probably have an updated cd player like the CDM12, CDPRO, or CDPRO2 installed in your juke. The update kit included a new power supply board which does not use those transistors. Updating the cd player required a new power supply board due to the different power requirements of the new player.

Here are the kit instructions:

http://arcarc.xmission.com/PDF_Juke...lling_CDM12_in_a_CDM-3_CDM-4_Kit_66505907.pdf

They leave it to the kit installer to either remove the now unused transistors or to simply abandon them in place.
 
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