Unitech PT-500 - Manual (Page 26)

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3. DIAG COM
Before diagnosing, loop back the RS232 port Pin 2-3,
Pin 7-8, and press [ENTER]. The test result will be
displayed on the bottom line.
4. DIAG MEM
During diagnosis, Memory Bank and Offset values
will be displayed. If no problem is encountered, a
“PASS” message will be displayed and you can exit
to the previous menu. If a problem is found, a
warning message will ask whether the test should be
aborted. Press [YES] to exit. Press [NO] to continue.
6. INIT MENU
Select [6] to Initialize the PT-500 and return the terminal
back to the Factory Default Setting.
< INIT MENU >
Warning!!!
Data will be LOST
Continue? (Y/N)
< DIAG MENU >
Connect Pin 2-3, 7-8
Ready? (Y/N)
< DIAG MENU >
Bank: 00
Offset: F800