8-5 Power Supply – 3-40-183
Removal and Replacement Procedures For 3739B and 3739C
8-10
PN: 10410-00306 Rev. F
VectorStar ME7838 Series MM
Replacement Procedure
Common Disassembly Procedures
1.
Power down the VNA and Test Set and disconnect the cables between the VNA, Test Set, and Modules.
Move the Test Set to the repair area.
•
“Disassembly Procedure – Power, Disconnect, and Covers” on page 8-1
above.
2.
Remove the top cover as described in the procedure above.
Disconnect the Power Supply Cable Harness
3.
On the front of the power supply, disconnect the Power Supply Cable Harness – ND73168 – 71918 from
the power supply. On the power supply, when the power supply is viewed from the front of the chassis,
the connectors are:
•
Left Front Connector, 8 Pin Connector, Pin 1 on right.
•
Center Front Connector, 3 Pin Connector, Pin 1 on right
•
Right Front Connector, 6 Connector, Pin 1 on right
•
The other end of the harness connects to the A1 PCB connector P4.
4.
On the rear of the power supply, disconnect the 3 Pin Connector which connects to the rear panel AC
Distribution Module and the front panel Power Switch.
Remove Power Supply
5.
Remove the four Phillips pan head screws holding the Power Supply in place and remove the unit.
Remove Power Supply Cable Harness
6.
Only perform this step is the harness is to be replaced. Otherwise, skip ahead to the next step. If the
harness is to be replaced:
a.
Disconnect the other end of the cable harness from the A1 PCB connector P4.
b.
Remove the harness.
c.
Connect the replacement harness to the A1 PCB connector P4.
Install Replacement Power Supply
7.
Place the replacement power supply into the chassis, and loosely insert the four screws.
8.
Make sure the power supply is correctly positioned, and then tighten all four screws.
Connect Power Supply Cable Harness
9.
Reconnect the power supply cable harness. The connections are:
•
Left Front Connector: 8 Pin Connector – Pin 1 on right.
•
Center Front Connector: 3 Pin Connector – Pin 1 on right
•
Right Front Connector: 6 Connector – Pin 1 on right
•
The other end of the harness should be connected to the A1 PCB connector P4.
Common Reassembly Procedures
10.
If no other interior replacement procedures are required, follow the common reassembly procedures
described above in
“Reassembly Procedure – Power, Disconnect, and Covers” on page 8-4
Summary of Contents for VectorStar ME7838 Series
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