HP Laser Jet 5550 - Page 329

Control panel message Event
log error
message
Description Recommended action
55.X
PRINTER ERROR
For help press
alternates with
55.X
PRINTER ERROR
To continue press
None The DC controller is not
communicating with the formatter.
The problem could be caused by a
timing error or an intermittent
connection.
1. Press to continue.
2. Turn the printer off and then
back on.
3. Reseat or replace the
connectors between the DC
controller and the formatter.
4. If the problem persists,
replace the DC controller
PCB. Calibrate the printer
after replacing the DC
controller. See
Calibrate now.
5. Replace the formatter.
Initialize NVRAM. See
NVRAM initialization.
57.X
PRINTER ERROR
To continue
turn off then on
None A printer fan error has occurred.
X Description
3 cartridge fan (vertical fan, FM3)
4 formatter fan (horizontal fan,
FM2)
7 power suppply fan (FM1)
Turn the printer off and then back
on.
57.3 Cartridge fan error (FM3)
1. Reconnect the connectors
J10 for the cartridge fan and
J1102 on the DC controller
PCB.
2. Immediately after starting the
print operation, measure the
voltage between pins 1 and 3
on the J10 connector. If the
voltage changes from 0 V to
12 V or 24 V, replace the
cartridge fan.
3. Replace the DC controller
PCB. Calibrate the printer
after replacing the DC
controller. See
Calibrate now.
57.4 Formatter fan error (FM2)
1. Reconnect the connectors
J11 for the formatter fan and
J1102 on the DC controller
PCB.
2. Immediately after turning the
printer on, measure the
voltage between pins 4 and 6
on the J1102 connector. If the
voltage changes from 0 V to
12 V or 24 V, replace the
formatter fan.
3. Replace the DC controller
PCB. Calibrate the printer
after replacing the DC
controller. See
Calibrate now.
Table 7-4. Numerical printer messages (HP Color LaserJet 5500 models) (continued)
ENWW Numerical printer messages 307