SONY WM D6C professional walkman - cassette player recorder repair fix

In this video i have repaired this nice Sony mw d6c, that had some serious issues.
So what was done:
Changed servo ic, because customer used power supply with wrong polarity jack and fried servo ic. Ic i have salvaged from very poor state wm dd11 that is also in the picture.
After ic swap servo started to work normally.
Then all belts and idlers were replaced with new ones.
Lubricated tape transport and motor.
Fixed broken headphones jack connections- it was messed up by previous technician and played only in mono- no stereo sound was present.
Set dolby levels.
Set azimuth that was off.
Cleaned and demagnetised tape path.
Cleaned all switches and potentiometers.
After all of these and more…now device works perfectly fine. Tape transport doesn’t give any strange noises (now very quiet) and also device plays in stereo finally. 🥰

#thanks for support
IF YOU WANT TO SUPPORT MY WORK AND SHARING KNOWLEDGE YOU CAN DO THIS BY SENDING ME A TIP VIA PAYPAL TO: [email protected]
THANK YOU 🙏

There is also group on facebook for more discussions about walkmans, cassette decks and other audio:
https://www.facebook.com/share/AT8yBq...

If you have any questions regarding repair please contact me.
Cheers

Background music: 'Free Corporate Soft Music (For Videos) - Pop by Alex Productions

#challenging #diy #repair #aiwa #walkman #restoration #cassette #dolby #players

0:00 Intro
2:20 Servo chip replace
5:50 Test after change
7:07 Tape transport belts and idlers replacement
21:00 speed and w&f test
22:15 headphones jack connections repair
27:21 final azimuth set and cleanup tape path etc...
28:00 final test of device after repair