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Procedure 4
Replacement Check
The power supply board or system board(s) may be disconnected or damaged. Disassemble
the T4700CS/T4700CT/T4800CT following the steps described in chapter 4, Replacement
Procedures, and check the connection between power supply board and system board(s) and
status indicator panel. After checking the connection, perform the following checks:
Check 1
Replace the power supply board with a new one. If the power supply is still not
functioning properly, perform Check 2.
Check 2
Replace the upper system board with a new one. If the power supply is still not
functioning properly, perform Check 3.
Check 3
Replace the lower system board with a new one. If the power supply is still not
functioning properly, perform Check 4.
Check 4
The status indicator panel will be damaged, go to status indicator panel trouble-
shooting.
T4700CS, T4700CT, T4800CT
2-11
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