To Remove And Replace The Power Supply; To Remove And Replace The Cpu Board - HP 1660 Series Service Manual

To remove and replace the power supply

Using previous procedures, remove the following assemblies:
1 1
•
Handle
•
Rear Feet
•
Cover
•
Disk Drive
Hazardous voltages exist on the power supply. To avoid electrical shock, disconnect the
W A R N I N G
power from the instrument before performing the following procedures. After disconnecting
the power, wait at least three minutes for the capacitors to discharge before servicing the
instrument.
Lift the PCB locking pins out of the chassis.
2 2
Slide the power supply out far enough to reach the power supply cables, then
3 3
disconnect them from the power supply.
Slide the power supply the rest of the way out the side of the instrument.
4 4
Reverse this procedure to install the power supply.
5 5
Check that the following assemblies are properly installed before installing the power supply:
•
Monitor
•
Front Panel
•
Switch Actuator
•
CPU Board

To remove and replace the CPU board

Using previous procedures, remove the following assemblies:
1 1
•
Handle
•
Rear Feet
•
Cover
•
Disk Drive
•
Power Supply
Disconnect the CPU board interface cable from the acquisition board by pressing
2 2
down on the cable release tabs on the cable socket located on the acquisition board.
Disconnect the HP-IB and RS-232C cables from the CPU board.
3 3
Disconnect the front panel cable from the CPU board.
4 4
Slide the board out the side of the instrument.
5 5
Reverse this procedure to install the CPU board.
6 6
Check that the following assemblies are properly installed before installing the CPU board:
•
Monitor
•
Front Panel
•
Switch Actuator
Replacing Assemblies
To remove and replace the power supply
6–7