Component Checkout Procedures
4-10 72A-2337-01 Rev. B 11/05
Component Checkout Procedures
This section lists procedures for troubleshooting the following components:
• ”Checking the Power Supply”
• ”Checking the Current Amplifier Board” on page 4-10
• ”Checking the Cooling Fans” on page 4-10
Checking the Power Supply
To verify proper operation of the power supply:
1. Connect a multimeter to a ground point on the chassis, for example Test Point 8.
2. Measure each of the following test points on the F6300 CPU circuit board, located in slot 3
of the backplane:
• Test Point #8 - Ground: Any point on the Instrument chassis can be used as a reference.
• Test Point #5 - +5 V DC ±0.25 V
• Test Point #7 - +12 V DC ±0.25 V
• Test Point #7 - –12 V DC ±0.25 V
NOTE These test points are not on the edge of the printed circuit board. They are located near the
middle of the circuit board.
3. Replace the Power Supply Assembly circuit board (04S-0794-01) in slot 11 if any of the test
point voltages are not present.
Checking the Current Amplifier Board
To verify proper operation of the amplifier circuit boards:
1. Select six i’s from the ProTesT software.
2. Verify that the 350V and SRC ON LEDs illuminate when enabled.
3. If any LED fails to illuminate when enabled, replace the circuit board for that amplifier.
Checking the Cooling Fans
To verify cooling fan operation, power up the F6150 and listen for the audible sound of the fans
spinning. This sound is the only indication that the fans are functioning. No LEDs or error
messages appear to indicate a problem until an over-temperature condition occurs.
CAUTION It is very important to verify fan operation at power up. Equipment damage can result during
operation with one or more broken fans.
If one or more of the cooling fans is not operating:
1. Power down the F6300.
2. Remove the cover. Refer to ”Remove and Replace the Instrument Front Panel” on page 5-4.
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