HP 8508A - Page 122

Service
f. Remove the 3 Cable connections to the Power Supply board.
g. Remove the 3 Pozidriv screws securing the Heatsink to the sideframe.
h. Remove the plastic safety cover after undoing the 4 Pozidrive holding screws.
i. Remove the 2 Pozidrive locating screws on the mains switch.
j. Remove the 7 Posidrive screws securing the Power Supply board to the main deck.
k. The Power Supply board can now be tilted up on the left side and the mains swich unsoldered and
removed.
NOTE: Do NOT dismantle the switch assembly and take care not to bend the operating cable.
1, The Power Supply board can now be removed from the instrument.
Refitting the Power Supply Assembly
Refitting the Power Supply is the reverse of the above procedure.
NOTE: After installing a new Power Supply assembly, the HP 8508A Adjustment procedures and Performance
Tests should be performed.
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