HP Designjet L25500 Printer series - Page 58

50 Chapter 2 Troubleshooting
Troubleshooting
Identifying faults from LED status
Use the following procedure to identify faults from the status of the LEDs.
1. If the Printer cannot be turned ON:
2. If the Printer starts (after having pressed the ON button on the Front Panel) but the front Panel
remains black:
3. The Printer is up and running, or may have a System Error at the end of the power-up sequence.
Signal LED on
Interconnect
PCA
LED on
PrintMech
PCA
Power
Switch
LED
Corrective Action
5Vsb OFF ON Amber
• Check the connection between the
PSU and the Interconnect PCA.
• If connection OK, replace the Inter-
connect PCA
⇒ See page 435.
5Vsb ON OFF Amber
• Check the connection between the
PSU and the PrintMech PCA.
• Make sure that ALL cables between
the PSU and PrintMech are not dam-
aged and are connected correctly.
5Vsb OFF OFF
Amber
or no
LED
• Check the connection between the
PSU and the PrintMech PCA and
Interconnect PCA.
• If connection OK, check that power
reaches the PSU (check the power
outlet).
• If power reaches PSU, replace the
PSU
⇒ See page 456.
Signal LED on
Interconnect
PCA
LED on
PrintMech
PCA
Power
Switch
LED
Corrective Action
5V OFF ON Blue
• Check the connection between the
PSU and the Interconnect PCA.
• If connection OK, replace the Inter-
connect PCA
⇒ See page 435.
5V ON ON Blue
• Check the connection between the
Front Panel and the Interconnect
PCA.
• If connection OK, replace the Inter-
connect PCA
⇒ See page 464 and
the Front Panel
⇒ See page 353.
Signal
LED on
Interconnect
PCA
LED on
PrintMech
PCA
Power
Switch
LED
Corrective Action
5V OFF ON Blue
• Check the connection between the
PSU and the Interconnect PCA.
• If connection OK, replace the Inter-
connect PCA
⇒ See page 435.