TH2689/89A Operation manual
27
Figure 3-28
（
c
）
SYSTEM CONFIG page 3
3.2.9.1 System parameter setting
（
1
）（
PARAMETER
），
default is L.C.
Figure 3-29
Move cursor to “PARAMETER”
：
Parameter is set as
（
I.R.
）
Parameter is set as
（
L.C.
）
（
2
）（
KEY LOCK
），
default is OFF
Figure 3-30
Move cursor to“KEY LOCK”
：
Turn on key lock
，
when the page is switched to test
function page
，
the former softkey zone
displays“KeyLock” which means key is locked. If unlock
the function
，
it is necessary to input
（
PASS WORD
），
refer
to the instruction of PASS WORD on page 3.
Turn off key lock
