HP 9130K Service Manual page 58

TP9 (E8) WRITE PROTECT
Volts/DIV: 1 V/DIV
Time/DIV: lOms/DIV
Inserting disc gives positive transition
Removing disc gives negative transition
TPIO (EIO) GROUND
TPll DRIVE SELECT
TP12 (U5-5) STEP
Volts/DIV: .2V/DIV
Time/DIV: lus/DIV
NO WAVEFORM
Maintenance 5-23