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Doesnt turn on. Power supply is good
Doesn't turn on, power supple tested good. What else can we check?
ANSWERS:
"@grandy8 you should tell us how you checked the power supply. Start with simple things first.
This unit is equipped with a Power Failure Detector function included in the CPU which checks for an abnormal condition in the chassis power supplies.
If, while the power is on, a failure is caused by any of the following that results in a low voltage supply, the CPU will turn the unit off in 1.5 seconds to prevent further damage:
• Failure within the power supply circuits.
• A short circuit in the load side from the supply.
Power Failure: Detected voltage failure for circuit. (Connected to IC801 pin 36.)
(Normal: High; Failure: Low)
If, while the power is off, the power is switched on and any of these failures remains uncorrected, the CPU will
shut off the power within three seconds.
Check the following if the unit is turned off by the power failure detector.
1. Disconnect the AC power cord (120V AC line) for a short time.
2. Connect a DC Voltmeter to the circuits shown below.
3. Press the Power key and check for the proper voltage supplies.
4. If any of these voltages is low, the power failure detector should turn the unit off within three seconds.
5. Check all circuits shown below.
Note: If power failure is detected 3 times in 15 minutes, the set will enter the standby mode and cannot be
switched On.To reset the operating programs of the CPU it is necessary to disconnect the AC cord for a short time.
If that does not do anything or the voltages are normal, follow the trouble shooting flowchart"
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