HP designjet l65500 Service Manual
Tr
ou
bles
hooting
178
Troubleshooting
OMAS and Vacuum Controller LEDs
To see these LEDs look between the
covers of the OMAS and Vacuum
controllers. No covers need to be
removed.
The LEDs are numbered in the table
from top to bottom.
Carriage Interconnect Board LEDs
The following photo shows the location of the power LEDs. The 3.3V and 14V supplies are generated
internally by the Carriage Interconnect Board from the 24V supply.
To see the LEDS, open the carriage lid and remove the carriage electronics cover page 657.
LEDs
LED
State
1
5 volts
On green
2
24 Volts
On green
3
CAN
On faint
green
3.3v to Primer assembly (DS1)
12v to Aerosol Fans (DS5)
24v to Main Power supply
(DS4)
24v Power from Main
Power Supply (DS2). ON if
42v arrives to the board