Disassembly and Repair 5
Keysight 34980A Service Guide 119
KOM Removal
1 Remove the power supply (see the procedure on page 116).
2 Disconnect the two ribbon cables on the top of the chassis.
3 Use a 3/16” nut driver to remove the nuts holding the Ext Trig DB9 connector
on the rear panel. Use a 9/32” nut driver to remove the nuts holding the GP-IB
connector on the rear panel.
4 Use a T20 Torx to remove the four screws holding the KOM printed circuit
assembly to the mainframe. Lift out the assembly.
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