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The CH-7 Threw me, Thought it was a Board Number, Inductors are usually identified by an L?
Transistors Use a Q as T was already used by Transformers which came out long before.
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https://www.google.com/search?q=mailmate+SPL-1209M3+circuit+board&rls=com.microsoft:en-US:IE-Address&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjqmJ7ntu_YAhUBZKwKHbiHCwYQ_AUICygC&biw=1366&bih=638&dpr=0.75#i...

I can usually read resistors, But can't read ALL Black. Don't know anyone who can, I f you know someone else has one, maybe open it up. Going to see if I can Google the board and see an image and...