Me 2..
Hi MadMutt
I, too have a CA7, requiring repairs to the balance control. If you do find a schematic, would you be so kind as to send me a copy?
Hi MadMutt
I, too have a CA7, requiring repairs to the balance control. If you do find a schematic, would you be so kind as to send me a copy?
Shaun - Yup same here.
Ended up replacing the balance control completely.
Used an Alps centre detent pot part number 697-928.
Final cost inc our gst and freight came to Au$74.21.
Will post some pics soon for you.
Only hitch was that the shaft on the replacement wasn't the length stated on the site.
I cut the extra needed off the original, cut a slot into the back of this 'extension', and then used two part epoxy to glue them together.
Works just fine, Customer VERY happy.
Tvi - Ta, email is -
f0rum5 at tpg dot com dot au
- note that first word has two numbers in it, a zero and a five.
Ended up replacing the balance control completely.
Used an Alps centre detent pot part number 697-928.
Final cost inc our gst and freight came to Au$74.21.
Will post some pics soon for you.
Only hitch was that the shaft on the replacement wasn't the length stated on the site.
I cut the extra needed off the original, cut a slot into the back of this 'extension', and then used two part epoxy to glue them together.
Works just fine, Customer VERY happy.
Tvi - Ta, email is -
f0rum5 at tpg dot com dot au
- note that first word has two numbers in it, a zero and a five.
Hi MadMutt
Thanks for the info. I had bypassed the balance control, but that caused the 3-way tone controls to malfunction, so I have the tone control bypass function permanently selected.
Who did you buy the pot from?
Thanks for the info. I had bypassed the balance control, but that caused the 3-way tone controls to malfunction, so I have the tone control bypass function permanently selected.
Who did you buy the pot from?
Quite easy really.
Owner/friend previously complained about crackling, so I had already sprayed it with progold (Caig labs) lasted for almost 2 years.
He started complaining again so I suggested he disassemble and spray himself.
He tried to cheat and not pull the front off to remove the black plastic cover, he ended up cracking 2 wafers.
So back it came for me to replace it.
Remove all knobs (not the volume one).
remove top and bottom covers.
remove front extrusion (watch for wire near left side).
remove front circuit board (only need to unscrew so it can be moved a bit).
undo volume control flexi joint (small allen key).
unbolt front sub panel (dont forget the control shaft nuts).
This allows you to move the front sub panel foward enough so that once the control is unsoldered it can be removed.
Forgot to mention, if you want the best for the unit, while its apart,
I also recomend replacing the opto couplers (look like white i.c.'s).
Their cheap and make quite an improvement to the overall sound of the unit.
Can't remember, but if theirs a memory batt/cap it will be crying out to be replaced by now too.
that should keep you busy for a day. 😉
Owner/friend previously complained about crackling, so I had already sprayed it with progold (Caig labs) lasted for almost 2 years.
He started complaining again so I suggested he disassemble and spray himself.
He tried to cheat and not pull the front off to remove the black plastic cover, he ended up cracking 2 wafers.
So back it came for me to replace it.
Remove all knobs (not the volume one).
remove top and bottom covers.
remove front extrusion (watch for wire near left side).
remove front circuit board (only need to unscrew so it can be moved a bit).
undo volume control flexi joint (small allen key).
unbolt front sub panel (dont forget the control shaft nuts).
This allows you to move the front sub panel foward enough so that once the control is unsoldered it can be removed.
Forgot to mention, if you want the best for the unit, while its apart,
I also recomend replacing the opto couplers (look like white i.c.'s).
Their cheap and make quite an improvement to the overall sound of the unit.
Can't remember, but if theirs a memory batt/cap it will be crying out to be replaced by now too.
that should keep you busy for a day. 😉
Just a follow-up note to say that I eventually bought a complete replacement balance control from B&W in England. Nakamichi Service.
hi, who was it had the schematic of the ca7? im looking for schematics of the ca5 or 7 and the pa5 or 7
with huge thanx in anticipation.......
with huge thanx in anticipation.......
Time for another bump to this thread.
Any other Aussies recommend any repairers in the country to do the balance knob repair/replacement?
If anyone has the Nakamichi part number as well that would be great as I couldn't locate it in the PDF service manual I have.
Any other Aussies recommend any repairers in the country to do the balance knob repair/replacement?
If anyone has the Nakamichi part number as well that would be great as I couldn't locate it in the PDF service manual I have.
i have searched for pot at farnell(newark), digikey and electrosonic and cannot find it .
i noticed on picture that there is 547g 5????? , cant make out the rest , would you have complete part #
i noticed on picture that there is 547g 5????? , cant make out the rest , would you have complete part #
I am looking for a little help with a CA7 I am working on. I have installed new main caps and fixed the loose knobs. The audio circuits are working fine. The remote volume does not work, but other functions are fine. Near the rear of the power supply are 2ea. 1/2 amp fuse. What are these for? They are open.