HP Forums / Not HP Calculators / Not remotely HP Calculators v / Texas TI-58C: (in)famous constant memory issues

Post Reply 
Texas TI-58C: (in)famous constant memory issues
10-25-2014, 03:38 PM (This post was last modified: 10-25-2014 05:47 PM by jebem.)
Post: #2
jebem Offline
Senior Member
 		Posts: 1,355
Joined: Feb 2014
RE: Texas TI-58C: (in)famous constant memory issues
Power supply voltage sources:
  • Common: +Vbatt
  • Vbatt (-3.6V)
  • Vdd (-10V)
  • Vgg (-16V)
  • Vdd2 (-5V) --> when powered Off, Vdd2 falls to -Vbatt (SRAM backup)

[Image: ti-58C_010.jpg] [Image: ti-58C_011.jpg] [Image: ti-58C_012.jpg]

Master Library 1 diagnostic results:
  • Library Module Check (SBR 2nd R/S) result: 1
  • Run Diagnostic (SBR =) result: 0 (flashing)
Apparently I have at least the Master Library 1 ROM in good condition.
As expected, the Diagnostic fails.
Jose Mesquita
RadioMuseum.org member
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
RE: Texas TI-58C: (in)famous constant memory issues - jebem - 10-25-2014 03:38 PM



User(s) browsing this thread: 1 Guest(s)

Contact Us | The Museum of HP Calculators | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication