Keysight Technologies 53210A, Service Manual

Page: 228 / 273

4 Retrofitting Options
228 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Preliminary steps
1 Remove the instrument cover as follows:
2 To remove the counter handle, rotate the handle to the vertical (90 degree)
position and pull outward on the two side arms.
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, 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. Refer to Figure 4-6 . Disconnect the two cables
going to the battery assembly.
6 Assemble the parts in the Option 106/115 package as follows:
CAUTION
Before proceeding with the installation, follow all the ESD steps as outlined
in the section titled Do This first under the Introduction at the beginning of
Chapter 4 of this service guide.
NOTE
Refer as necessary to the illustrations in the section titled “To Remove the Cover
and Rear Bezel” on page 185 of this guide.
NOTE
Refer as necessary to Figure 4-14 .