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Step 10
(from Step 1 and 9)
The xy value in SRN 409-Axy or 409-Bxy is the hex value for the Power Status Register
byte. Line 2 of the operator panel display identifies the unit that contains the error. The bits
in the Power Status Register are defined as follows:
8 4 2 1 8 4 2 1 = Hex value of bits
7 6 5 4 3 2 1 0 = Bit numbering
For example, 56 (0101 0110) represents bits 6, 4, 2, and 1. A zero indicates the active
state.
Is bit 6 or bit 7 a zero?
NO
YES
over / under voltage on +5, +12, +5 mem, or +3.6 volts
overload (over current) on +5, +12, +5 mem, +3.6, or +3.3 volts
overload, over/under voltage on +/–12 volts, Standby fault
overload, over/under voltage on +5 volts, Standby fault
250 volt undervoltage
display power on/off status
first level over temperature detected by the power supply
second level over temperature detected by the power supply
Go to Step 12.
Go to Step 11.
Maintenance Analysis Procedures (MAPs)
3-1520-7
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