1.3. Power Supply Voltage Abnormalities
Is SMPS [
IC91, IC95
] operation stopped while power is being supplied to the SMPS PCB unit?
If the voltage of the [
C925:+ terminal
] is +29V and the voltage of the [
C928:+ terminal
] is +5V, the
circuit is operating normally.
NO
There is an abnormality in the SMPS power supply detection circuit.
Replace any defective parts or the SMPS PCB.
YES
NO
Does the power supply voltage supplied from SMPS to MAIN [
CN93 : 4, 6, 8, 11, 13pin
] differ signifi-
cantly from the voltage written in the circuit diagram?
If the voltage differs from the written value by ± 0.5V or more, there is an abnormality in the power
supply.
There is an abnormality in the SMPS power supply detection circuit.
Replace any defective parts or the SMPS PCB.
NO
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
48
