TAG 500: +5 Vdc Power Malfunction
June 1999 Troubleshooting Analysis Guide (TAGs) 3-113
5
Check J/P42-1 for +5 Vdc.
Is the voltage +5 Vdc?
No: Repair or replace the connectors or wiring from P94-1 to J/P90-1 to P42-1, then turn to
TAG 002: Check & Problem Resolution.
Yes: Continue.
6
Turn the printer off and unplug the power cord.
• Disconnect J/P8 and J/P42.
• Check P42-20 to P8-15 for continuity.
Is there continuity?
No: Repair or replace the connectors or wiring from P42-20 to J/P90-20 to J/P94-2 to P8-15,
then turn to TAG 002: Check & Problem Resolution.
Yes: Replace the operator panel circuit board. If this resolves the problem, turn to TAG 002:
Check & Problem Resolution. If this does not resolve the problem, replace the PCL
board, wire harness W72, or wire harness W63, then turn to TAG 002: Check & Problem
Resolution.
7
Turn the printer off.
• Disconnect J/P330.
• Turn the printer on.
• Check J/P8-1 for +5 Vdc.
Is the voltage +5 Vdc?
No: Continue.
Yes: Go to #15 in this TAG.
8
Turn the printer off.
• Disconnect J/P8.
• Turn the printer on.
• Check J/P330-3 for +5 Vdc.
Is the voltage +5 Vdc?
No: Go to #22 in this TAG.
Yes: Continue.
9
Turn the printer off.
• Reconnect J/P8.
• Disconnect J/P77.
• Turn the printer on.
• Check J/P8-10 for +5 Vdc.
Is the voltage +5 Vdc?
No: Continue.
Yes: Replace the disk drive assembly, then turn to TAG 002: Check & Problem Resolution.
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