DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127 Issue 1
August 1997
Maintenance Object Repair Procedures
Page10-412V-PWR (12 Volt Power Supply)
10
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the following table. By clearing
error codes associated with the

12 Volt Power Supply Test

for example, you may
also clear errors generated from other tests in the testing sequence. T he 12 Volt
Power Supply Test can be initiated via either the test card-mem command or the
test network-control command.
12 Volt Power Supply Test (#701)
This test is nondestructive.
The purpose of the test is to diagnose the 12 volt power supply unit in the
TN777B NETCON circuit pack. No erase and write-to-memory operations are
started or verified during the test. The contents of flash memory and of the
memory card should not be changed.
The test turns on the power supply, and it verifies that 12 volt power appears by
reading the control register in the TN777B NETCON circuit pack. After the power
supply is turned on, the maintenance software waits for three seconds before
verifying the appearance of 12 volt power. After the 12 volt power supply can be
turned on and verified, the test turns the power supply off and then verifies that
the power is off. The control register in the TN777B NETCON circuit pack is read
again for the verification.
1. D = Destructive; ND = Nondestructive
2. Refer to “CARD-MEM (Memory Card)” information for a description of th is test.
Order of Investigation Short Test
Sequence Long Test
Sequence Reset Board
Sequence D/ND1
12 Volt Power Supply Test (#701) X X ND
Memory Card Insertion Test (#695)2XX ND
Memory Card Format and Read Test
(#696) (a) XX ND
Memory Card Match Test (#697)2XX ND
Memory Card Write-Protected Test
(#698)2XX ND
Memory Card Directory Recovery Test
(#699)2XX ND
Memory Card Translation Data Integrity
Test (#694)2XND
Memory Card Erase/Write/Read Test
(#693)2XND