Removing The Rear Panel Assembly - Agilent Technologies 53147A Assembly Level Service Manual

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NOTE
Chapter 3 Replacing Assemblies

Removing the Rear Panel Assembly

Removing the Rear Panel Assembly
Use the following procedure to remove the rear panel assembly:
Remove the shroud (see "Removing the Shroud" on page 3-7).
If the Battery Option is not installed, remove the four 4-40 self-locking hex
nuts that attach the battery opening cover to the rear panel (these nuts
are accessible from inside the chassis). Remove the battery opening cover,
and skip to step 5.
If the Battery Option is installed, remove the battery sled from the
Counter (for instructions on removing the battery sled, see Appendix C
of the Agilent 53147A/148A/149A Operating Guide).
If the Battery Option is installed, remove the four 4-40 x 3/16-inch
self-locking flathead machine screws that attach the rear panel assembly
to the Battery Option chassis as shown in Figure 3-6 (two screws on each
side of the opening).
Rear panel
AC
90-130 VAC 50/60/400 Hz
190-230 VAC 50/60 Hz
screws
WARNING:
Figure 3-6. Rear Panel Assembly Screws
Remove the nine 4-40 x 3/16-inch self-locking flathead machine screws
that attach the rear panel assembly to the chassis (see Figure 3-6).
The screw in the lower-left corner of the rear panel assembly (as viewed
from the rear of the Counter) may be covered by the serial-number sticker.
If it is, carefully cut away the lower-left corner of the sticker to expose the
screw head.
Assembly Level Service Guide
Main Power Reference 10 MHz Auxiliary
Agilent
In or Out
Battery
!
!
POWER FUSE OPTIONS
option
1.5A T
250V 001 Oven Time Base
002 Battery
screws
232 GPIB
RS-
To avoid electrical shock: No user serviceable parts inside. This unit must be earth grounded.
Do not remove covers. Refer all servicing to qualified personnel.
Rear panel screws
Counter/ Power Meter/ DVM
Battery
Rear panel
screws
Battery
Charging
EXT DC
11 to 18 VDC
+
Made in U.S.A.
of domestic and foreign content
3-11