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CPU (IC801) is programmed so the set will go to the standby mode when there is circuit failure as described below.
(Refer to “Block Diagram Power Lines” and “Block Diagram Power Board”).
1. Power Failure 1: Detected voltage failure for digital circuit. (Connected to IC801 pin 1.)
2. Power Failure 2: Detected voltage failure for analog circuit. (Connected to IC801 pin 16.)
(Normal: High; Failure: Low)
POWER FAILURE CIRCUIT
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
or AC adapter for a short time.
History of Power Failure
When finishing the repair or stopping the Power Failure, the history of past failures can be checked.
To see the history
1. Enter the service mode. See “Service Adjustments” page 3.
2. Select Item No.0D0 POWER ERR from the Service Adjustment Data Table.
History of Power Failures (Item No. 0C9)
Note: If simultaneous failures have been detected, the sum of each data is displayed.
For example:
Power failures 1 & 2
01h + 02h = 03h(3)
Attention:
After finishing service, reset the data of Item No. 0D0 with the + or – keys to
““0000hh((00))..””
Failure Name Data
No Failure 00h(0)
Power Failure 1 01h(1)
Power Failure 2 02h(2)