8
512 model:
(1) LCD display
(2) S1-S6 operation auxiliary buttons (Soft Key)
(3) PASS & FAIL & HIPOT LED
(4) Control button (Edit Key) group
(5) Test shortcut button group
(6) System reset (Reset) button
(7) Power switch
(8) Pin search connector, 512Pin has 8 slots
(9) 512Pin has 8 slots
(10) Test button [TEST]
(11) System button (Sys Key) group
(12) USB flash drive
(13) High voltage correction output connector