Using the PCA LEDs to Troubleshoot 17
Troubleshooting
24V - Comes from the PSU after a fuse on the PrintMech PCA.
VPOWER2 - Comes from the PSU (42V) after a fuse on the Interconnect PCA. Used to power the Carriage
PCA. Should be ON at the same time as Green Power Switch LED.
PrintMech PCA
The following illustration shows the locations of the LEDs on the PrintMech PCA.
5Vsb - Comes from the PSU after the fuse on PrintMech PCA.
3V3 - Comes from the Power Supply Unit.
5V - Comes from the Power Supply Unit.
VPOWER2 - Comes from the PSU (42V) after a fuse on the PrintMech PCA.
VAUX - Comes from the PSU (12V) after a fuse on the PrintMech.
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:
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
Interconnect PCA
⇒ See page
357.
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 damaged and are con-
nected correctly.
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