Tektronix AWG7000 Series, Service Manual

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Troubleshooting
4-42
AWG7000 Series Service Manual
Checking the Power
Supply Voltages
To check the power supply voltages, power on the instrument and connect the (–)
lead of a multi-meter to chassis ground.
To measure the output voltages of the power supply, check the voltages at J104 on
the PWR board with the multi-meter and compare each reading to the values listed
in Table 4-4. If the voltages are within the allowance, your power supply is
functional.
Figure 4-20: PWR board test points
Table 4-4: Power supply voltages
PWR board (J104) Voltage Allowance
Pin1 +3.3 V +3.1 V to +3.5 V
Pin 3 +5 V +4.7 V to 5.3 V
Pin 5 +12 V +11.4 V to +12.6 V
Pin 1
+ 3.3 V Pin 3
+ 5V Pin 5
+ 12 V
Multi-meter (+) lead