Please select To the mobile version | Continue to access the desktop computer version

Kaosun's CD Players

 Forgot password?
 Repair!
Search
View: 4109|Reply: 3

Sony D-66 repair

[Copy link]

1

Threads

5

Posts

126

Credits

Member

Rank: 2

Credits
126
Post time 2023-10-26 15:12:21 | Show all posts |Read mode
Hi everyone,

I have two nice looking D-66s, but both in the same poor technical condition. When turned on, the display works and nothing else happens. Sometimes the motor spins, but it's completely random. I fully recaped both, cleaned PCB's, checked traces and vias. No results. I'm planning more serious measurements and I'm asking for any hints here.

Thanks.
Reply

Use magic Report

640

Threads

1026

Posts

6095

Credits

Administrator

Rank: 9Rank: 9Rank: 9

Credits
6095
Post time 2023-10-30 10:53:23 | Show all posts
The leaking caps usually corrode the trace/via on the PCB. Carefully repair all those mentioned will bring the D66 back to life.
Reply Support Not support

Use magic Report

1

Threads

5

Posts

126

Credits

Member

Rank: 2

Credits
126
 Author| Post time 2023-11-03 14:44:28 | Show all posts
Thanks for reply kaosun. Yes, I know this all too well. I will have to double check everything again.
Reply Support Not support

Use magic Report

1

Threads

5

Posts

126

Credits

Member

Rank: 2

Credits
126
 Author| Post time 2024-09-07 03:22:54 | Show all posts
Small update just for the records. I have successfully repaired both of my D-66s.

During the measurements I noticed a lack of +3.7V on IC502, which led me to Q407 which after checking turned out to be OK, but no +3.7V on the collector. Following this lead I checked a pair of control transistors (Q408) and bingo. Their emitters should be pulled-down via R416 and here I found a break on the trace invisible to the naked eye. This appears to be a weak point susceptible to corrosion as the same issue occurred in both players. I marked the break location in the photo.


This post contains more resources

You have to Login for download or view attachment(s). No Account? Register

x
Reply Support Not support

Use magic Report

You have to log in before you can reply Login | Repair!

Points Rules

Archiver|Mobile|Dark room|Kaosun's CD players

2024-10-11 06:19 GMT-6 , Processed in 0.038965 second(s), 21 queries .

Powered by Discuz! X3.4

Copyright © 2001-2020, Tencent Cloud.

Quick Reply To Top Return to the list