4 Retrofitting Options
214 Keysight 53210A/53220A/53230A Assembly Level Service Guide
3 Using a T20 TORX screwdriver, loosen the two T20 TORX screws securing the
rear panel bezel.
4 Slide the outside cover of the counter to the rear and remove the cover.
5 If installed, disconnect and move the Option 300 Internal Battery DC Power
Assembly out of the way as follows (refer to the figures in Chapter 3, "To
Remove the Internal DC Battery Assembly (Option 300)", as needed):
– Remove the two T20 TORX screws and lockwashers holding the Option 300
assembly to the left-hand side panel (as viewed from the rear of the
instrument).
– Lift up carefully on the left side of the assembly and separate the assembly
from the three large tabs holding it on the right side.
– Lay the assembly on its back to the right side of the chassis and place the
three small tabs (on the back side of the three large tabs) into the three
slots on the assembly deck. Disconnect the two cables going to the
assembly.
6 If installed, move the Option 106/115 channel 2 assembly (53210A) or channel
3 assembly (53220A/53230A) out of the way as follows (refer to the figures in
Chapter 3, "To Remove a 6.0 GHz or 15.0 GHz Microwave Channel Assembly
(Options 106/115)", as needed):
– Remove the T20 TORX screw and lockwasher at the rear end of the Option
106/115 aluminum deck.
– Remove the two flathead screws that secure the assembly to the side
panel.
– Using a 5/16" open end wrench, loosen the SMA connector on the end of
the semi-rigid cable that is connected to the PC board.
– Slide the Option 106/115 assembly to the rear of the chassis, as necessary,
to expose the two gold-connectors at the front of the motherboard near the
front panel (J101 and J201).
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