Start Up
TDS 620A, 640A & 644A User Manual 1Ć5
Front Cover Removal
!' % #! % !'# )#$"  %$ %   #% $   $ ""  %
! ! % #! % $&"   # $%     $ "  ! 
Power On
  %% % ##+"  "# " "!(# $(% $ ! $ &# +
 "# " "!(# $(% ! %#!$   "!(# %! %  $%#& %
  % !$!$!" $ !%"!(# ! % $# $  "&$ %
#! %+"  ON/STBY &%%! %! %! % ! $ &# +
 ON/STBY &%%! ! %#!$ "!(# %! !$% ! %  $%#& % #&%$
!(# ! % &$%! ! %! #% "#%$ ' ( %$ $(% $ $% %!

  % %*  !$!$!" $  $% % $ %)" %! ' %
"# " "!(# $(% !   &$ % ON/STBY &%%! $ % "!(#
$(%
 
Figure 1Ć2:ăON/STBY Button