
No +5V voltage
Whether
cathode of D510 has
power output
Check D510 and transformer
Whether
pin 7 of CN502 has
power output
Check +5V filtering circuit
OK
8. Troubleshooting flow chart for “No +5V voltage”is shown in the following figure 3.3.2.8:
Figure 3.3.2.8 Troubleshooting flow chart for “No +5V voltage”
Y
N
Y
N
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