News:

Only forum members can post to threads.  To become a member, click the sign-up button in the upper left-hand corner and register.  Create a username and provide and email address.  You're required to answer three (3) HiFi related questions to register, the responses are not case sensitive.  If you're having trouble becoming a member, have a suggestion or wish to report a problem email to forum@northreadingeng.com.  Usuallly takes a day or two to respond. 

Main Menu

PC Board Damage

Started by nre, Dec 20, 2022, 05:38 AM

Previous topic - Next topic
Print
Go Down Pages1
User actions

nre

Dec 20, 2022, 05:38 AM
The last McIntosh amp I worked on showed this issue on the preamplifier PC board.  The traces are wrinkled and blistered.  I've seen this before on other first-generation solid-state amplifiers.  I presumed it was thermal distress from a de-soldering heat gun but was unable to replicate it using another board.  I'm thinking it's a Quality problem with the board.  This particular board came from an MC2505. 

It works fine, the traces are still conducting but I've replaced it regardless with a new board.

distressed_board_2.jpg

distressed_board_1.jpg     
Print
Go Up Pages1
User actions