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Old 23rd Oct 2021, 9:58 pm   #184
retromit
Pentode
 
Join Date: Oct 2021
Location: Falkirk, Scotland, UK
Posts: 140
Default Re: Commodore PET 2001 voltage regulators

Quote:
Originally Posted by ajgriff View Post
Quote:
Originally Posted by retromit View Post
I've tried swapping them, but when I do I get a blank screen; then when swapping them back I get the normal boot screen with no cursor.
Sorry Tim I got confused. What happens if you put UC6 in the UC7 socket and leave the UC6 socket empty?

Alan
Okay, the current confoguration of UC6 and UC7 gives the boot screen, but no cursor. Following your suggestion:

- Removed UC7 and put UC6 in UC7 socket (with UC6 then empty). This produced the boot screen and flashing cursor; good news!

- The new UC7 removed, old UC7 inserted (UC6 still empty). This produced the boot screen with no prompt.

I then tried the first scenario on UC6 in UC7, then put the original UC7 in the UC6 slot and powered on the PET - it only gave a blank screen.

Incidentally, when the first scenario was in place (when we had the cursor) the keyboard looked to be working as well. I must admit I thought I might have had issues with the keyboard not working.

Tim.
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