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1

Omega Electrical and Audio Help / Re: CDR 2005 volume control

« on: 29 August 2007, 22:03:39 »

.. Just to add if it's a pot that's gone noisy sometimes a squirt of switch cleaner / lubricant will revive them (sometimes only temporarily).

The top comes off a CCR2006 quite easily (see my howto on fitting line level outputs) so this is another option to get at the controls, although I don't recall how much access this gives you. Hopefully enough for a squirt of switch cleaner.

I would imagine the configuration of a rotary encoder, push button switch and pot for the balance control is an unusual one and it may well be difficult to find a new replacement. You may have to keep an eye out for an otherwise knackered radio to break for spares.

Kevin

Not sure if I made taking the front off sound complicated, but its really a trivial 5 min job ( provided you have a suitable torx screwdriver of course..)  and the pots and switches are attached to the back of the front panel so you get really good access this way, and can have a good look at the solder joints, or spray the pots with something ( worth looking at the soldering first though as spraying them unnecessarily could cause problems with the pots they didn't already have I'd imagine. )


You could consider spraying them with something like "Deoxit Fader Lube Potentiometer Cleaner"
http://cgi.ebay.co.uk/Caig-Deoxit-Fader-Lube-Potentiometer-Cleaner-14g_W0QQitemZ170143915871QQihZ007QQcategoryZ21145QQcmdZViewItem
( I've never used the stuff, so I can't say if its any better than spraying them with contact cleaner though.)

I suppose if the pots are broken and you can't find replacments you might could remove them ( or cut their pins off, and leave them on the switch stack), and replace with fixed resistors ( though getting the balance centered this way could be a problem ).

Or it could actually be the rotary encoder which is faulty.
Does the volume alter when you just touch the control?
Or is it only when you turn it?
Does it sound as if you loose volume one channel ( left of right), or both together?

2

Omega Electrical and Audio Help / Re: CDR 2005 volume control

« on: 27 August 2007, 23:57:47 »

Not sure about the CDR2005 but have had a similar problem with a CCR 2006 the volume knob works a rotary (digital) encoder when you turn it ( as someone said its like tapping a volume up or down button as you turn it. )   If you pull the volume knob out and turn it, it adjusts the balance ( left/right )  and this was playing up, if you just touched the knob you lost almost all of the left or right channel...  It turned out to be just be a couple of dry joints where the pots ( for balance) were soldered in ( just needed resoldering no components necessary)

Procedure was roughly:-
   remove the unit, ( Make sure you have the radio code, small alan key for security screws + double din removal tool )

   Remember electronics, are best done at a static safe electronics workstation by someone that knows what they are doing for both your safety and depending how paranoid you are to not damaging your radio... so don't continue if you don't know what you are doing and understand the risks ( electric shock from capacitors in the radio etc.... )
  Oops, started to sound a bit like a lawyer there (which I'm not) , but basically don't blame me if ANYTHING goes wrong....

   remove small torx screws on the sides which hold the plastic front panel in place
   I think there where also small plastic catches which need to be moved slightly positioned sort of beween the two halfs of the unit ( radio-cass/cd-changer)
   Ease the front panel off, which was plugged into the rest of the unit - watch out yours may be different and have delicate ribbon cables or something ...
 
   Look at the volume/balance control, you can see the two pots and rotary encoder on a tiny circuit board on the back of it.
   Examine the soldering on the joints for the encoder and pots.
   Resolder any dry joints ( or get someone else to if you've not got the skill to do it your self.... )
   Carefully inspect to check no solder had gone astray and shorting anything out!!

   Reverse instructions to refit, ( though obviously dont desolder the joints   )

Not sure where you'd get replacement pots if you need them, you could try www.cpc.co.uk, or farnell, maplin etc, maybe even try asking at your local tv repair shop....

3

Omega Electrical and Audio Help / Re: Bose... No sound

« on: 29 August 2007, 22:15:27 »

Unlikely to be the following, (you'd probably hear something at least), but It could be both of the balance pots have dry joints.
i.e. the one that controls the left channel is acting as if the balance is all the way right and vise versa for the right channel.

See my post in the CDR 2005 thread....
http://www.omegaowners.com/forum/YaBB.pl?num=1187004803

Timbuk should have updated this post. It turns out the amp was missing

Well i sort of did in another thread  

Ok, well at least you know whats wrong with it now.   Hope you can find an amp at a scrap yard or breakers  

4

Omega Electrical and Audio Help / Re: Bose... No sound

« on: 28 August 2007, 07:41:07 »

Unlikely to be the following, (you'd probably hear something at least), but It could be both of the balance pots have dry joints.
i.e. the one that controls the left channel is acting as if the balance is all the way right and vise versa for the right channel.

See my post in the CDR 2005 thread....
http://www.omegaowners.com/forum/YaBB.pl?num=1187004803