Replacing The Option 005 Board - HP 54645A User's And Service Manual

Replacement Parts

Replacing the Option 005 board

Replacing the Option 005 board
The Option 005 board is only serviceable at the board level.
No component level information is available.
Hazardous voltages are on the CRT, power supply, and display sweep board.
W A R N I N G
To avoid electrical shock, disconnect the power cord from the oscilloscope.
Wait at least three minutes for the capacitors in the instrument to discharge
before you begin disassembling the oscilloscope to remove Option 005.
Do not replace assemblies while the oscilloscope is turned on, or damage to
C A U T I O N
the components can occur.
Refer to the exploded diagram view later in this chapter for details on how
the Option 005 board fits in the oscilloscope. After you remove the defective
board, follow the instructions in reverse order to install the new Option 005
board.
Remove the oscilloscope from the cabinet.
1
a
b
c
d
Remove the faulty Option 005 board.
2
a
b
c
d
8-10
Turn off the oscilloscope and disconnect the power cable.
If a module is installed in the oscilloscope, remove it.
Using the T15 TORX driver, remove the two screws from the rear of
the cabinet.
Using your thumbs, gently push on the two rear-panel connectors to
slide the oscilloscope out of the cabinet.
Using a T10 TORX driver, remove the two screws that lock the
Option 005 board to the chassis.
Slide the board back away from the front panel to release it from the
keyholes.
Disconnect the three cables attached to the Option 005 board.
Remove the board from the keyholes, and from the oscilloscope.