NAD 6050C

 The NAD 6050C Cassette Deck

(When this article is finished, this notice will be deleted.)

I admit, I've become a cassette deck addict - I simply want to fix them! I buy them cheap off ebay, but always first assess their build quality, potential present, and potential future faults before bidding.

My latest repair job is this NAD 6050C front loader. Like many, it was advertised as 'Spares or Repair'.

The date of manufacture was 1984, as stamped on the motor.

Initial problems

• Dusty and dirty internally, but mainly in the cassette tray
  
• Disintegrated belts - new belts fitted.
  
• Noisy DC Motor - cured with Servisol Super 10 injected down the neck/spindle of the motor.
  
• Inert or sticky transport - isopropyl and Servisol Super 10 freed, and cleaned the mechanisms. Some PTFE spray and silicone grease applied where necessary.
  
• Cassette tape guide and hold latch - see below.
  
• Inconsistent output - Servisol Super 10 applied to all potentiometers.
  

All the above have been fixed.

Now fully working: The NAD 6050C

Previous Findings:

The cassette guide and plastic latch on the right hand side was repaired - it had developed a small, almost unnoticeable fracture which weakened the spring action. I super glued the fracture - opening the fracture to allow glue to work into the crack. A small, cut piece of aluminium acting as a support bar was also bonded underneath to support the stressed area.

Now the spring action of the latch is 'springy' and strong.

 

Tape Wrap across the Erase, and Record/Playback Head

 

The Power Supply

Quite simple - a mains switch (no suppressor capacitor present), then a fuse into the primary transformer windings.

More to follow later ...

 

 

New Belts Fitted

 

After the mechanism was cleaned and lubricated, new belts were ordered - all working well. 

Rewind Problem

 

It is important that the compression from 'pulley 1' is high, as this also pushes the gearing for REW (rewind) into place.

 

Pulley 1: I initially fitted a belt that worked, but the gears did not  always engage quickly. Later a smaller (and tighter!) belt was fitted, and now the problem has disappeared. (correction made)

 

8/10/2021.