Specifications

Chapter 4 Retrofitting Options
To Retrofit the 53210A Channel 2 Front Panel Input (Option 106 or
Option 115, plus Front Panel Option 202)
Assembly-Level Service Guide 207
Preliminary Steps
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.
1 Remove the instrument cover as follows:
NOTE Refer as necessary to the illustrations in the section titled “To
Remove the Cover and Rear Bezel” on page 173 of this guide.
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, disconnect and move the Option 300 Internal Battery
DC Power Assembly out of the way as follows (refer to the figures
in "Removing the Internal Battery DC Power Assembly" in
Chapter 3, 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.
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