Rotel RCD-971 gone haywire

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Well, the switches and the belt arrived this morning and now I'm ready for surgery!
This being my first DIY effort I was wondering if anyone had some advice for me on procedures, etc. ?
I have the service manual printed out with great diagrams and the tools but I don't even know if I have to remove the transporter or if I can replace the belt and leaf switches without doing that.
All advice much appreciated
 
Have a 971 also, it and as far as I can tell, mopst every rotel gets the "fight the drawer" syndrome. I find it happens occasionally and then quits. Once in a while it starts on track 10 as well. Just every now and then, I've had it since new.

russellc

Hi Russell,
The symptoms won't go away, even with extended unplugged time, so hopefully I have the solution(s)....
 
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Take it slowly and just don't force anything... can't tell you exactly how to dismantle without having it in front of me... but usually it's quickest and easiest to dismantle everything.

Good luck... post some pictures if you are not sure.
 
Well, I have opened her up and unplugged the two connectors to the transport mechanism The main white ribbon cable seems to be soldered in place. I can see that one of the two leaf switches is weak and bent back which is what might be the source of the problem. I can't however get at them (3rd pic on the right side) to replace both as I can't seem to figure out how to get the tray off. It seems to be bolted somehow at the end where the main door is I have attached a couple of (bad ) pics. Do I have to undo the 4 screws (2nd pic) with springs on them on the bottom of the transport? I will take some better pics a bit later....
All help welcome!
Dave
 

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The white foil connector... it just plugs in. Depending on the socket there may or may not be a retaining "bar" that has to be loosened (flicked up). Be very careful not to rip the foil, grip it tightly and over as large an area as possible near the socket and gentle pull each end to waggle it out. I would do it at the laser end. Hard to see in the piccy but the laser socket looks like it might have a clamp... can you see at the top of the socket. There may be plastic lugs or wings holding it... just gently prise them and the bar releases.
If you undo the four screws the whole sub chassis drops out. Sometimes the springs are different front to rear (depends on the design/weight etc) so don't mix them up.
It's difficult without having it actually in front of me to give exact step by step instructions... it looks like a million others :)... and it's usually easiest just to dismantle fully.

Having said all that and looking again, to replace the microswitches it might be easier to just unsolder the PCB from the loading motor (use braid and don't overheat the connections as the motor "end plate" is nylon), and remove the PCB with switches still attached and then work on it from there :)
 
The white foil connector... it just plugs in. Depending on the socket there may or may not be a retaining "bar" that has to be loosened (flicked up). Be very careful not to rip the foil, grip it tightly and over as large an area as possible near the socket and gentle pull each end to waggle it out. I would do it at the laser end. Hard to see in the piccy but the laser socket looks like it might have a clamp... can you see at the top of the socket. There may be plastic lugs or wings holding it... just gently prise them and the bar releases.
If you undo the four screws the whole sub chassis drops out. Sometimes the springs are different front to rear (depends on the design/weight etc) so don't mix them up.
It's difficult without having it actually in front of me to give exact step by step instructions... it looks like a million others :)... and it's usually easiest just to dismantle fully.

Having said all that and looking again, to replace the microswitches it might be easier to just unsolder the PCB from the loading motor (use braid and don't overheat the connections as the motor "end plate" is nylon), and remove the PCB with switches still attached and then work on it from there :)

Hi Mooly,
the ribbon doesn't unplug, it seems to be soldered at both ends, no clamp or "retaining bar". Got the laser chassis out (screws carefully put aside)but it doesn't so me much good. The leaf switches are still a pain to get at without opening the drawer mechanism. You're right, it needs to be unsoldered to get at it which means I now have to give myself a crash course in soldering! Never done it before.....

That still leaves me though with getting at the belt to replace it (to make sure it isn't the problem and I can't do that without uncovering the underneath of the drawer mechanism. I will take better pictures tonight and post them.
thanks!
D
 
Like this,

Edit... I'll look in tomorrow... don't rip that foil ;)

Like this,

Edit... I'll look in tomorrow... don't rip that foil ;)
Thanks Mooly! Yep, that's the one, I've given it a pretty good (controlled) tug and it doesn't move at either end and it seems to be soldered, but what do I know!:D
I will take some good pics tonight and post and wait for your input tomorrow.
 
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Today, after playing as usual with no problem, I changed the CD and suddenly the loading tray refuses to stay closed and the machine won't read any disc. The tray closes, there's a "00" reading in the display and then the tray re-opens. It won't stay closed without a disc in it either. The only way to keep it closed is to hit the close button and then turn it off as soon as it's shut. It is firmly shut when it does close though.



I had the same experience with RCD971 of my friend, and the problem is very, very easy to solve.
Inside the CD meachanism, there is a motor and rubber, which by simple mechanism push up part the CD tray after closing and then activate the switch. In some production run, the rubber has no enough friction and the mechanism cannot be pushed to fis the tray, and activate the switch
Either you have to change the rubber, or you should "make" a better friction between the rubber and the the motor lead/axis. Precise sanding works best
The rubber is a bit tricky to remove and mount (but it is accessible), but using a good grasp will help very much.
 
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Well I have the tray off the lens assembly without removing the ribbon. Still can't get at either the two leaf switches (although I managed to destroy one of them in trying to get it off - no sweat I have two new ones) and the belt is impossible to gt at unless I can figure out how to remove the tray. I will post pics tomorrow, right now I have to put the little guy to bed, Thanks to all who are helping!
 
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