HP Laser Jet 5550

Control panel message Event
log error
message
Description Recommended action
50.X FUSER ERROR
For help press
None A fuser error has occurred.
X Description
1 low fuser temperature
2 fuser warmup service
3 high fuser temperature
4 faulty fuser
5 inconsistent fuser
6 open fuser
8 low fuser temperature
(sub=thermistor)
9 high fuser temperature
(sub=thermistor)
1. Turn the printer off and allow
it to cool down.
2. Reinstall the fuser, and check
the connector (J100) that
connects the fuser and the
printer. Replace the
connector if it is damaged.
3. Turn the printer off and
remove the fuser. Measure
the resistance between the
connector pins on the fuser. If
resistance does not meet the
following guidelines, replace
the fuser.
J100LB-5 to J100LB-6: 300 -
500 KOhms
J100LB-1 to J100LB-2: less
than 1 KOhm
4. Check for continuity between
connector pins J100-5 and
J100-6. If there is no
continuity, replace the fuser.
5. Replace the fuser power
supply PCB.
6. Replace the DC controller
PCB. Calibrate the printer
after replacing the DC
controller. See
Calibrate now.
51.XY
PRINTER ERROR
For help press
alternates with
51.XY
PRINTER ERROR
To continue
turn off then on
None A printer error has occurred.
X Description
1 beam detect error
2 laser error
Y Description
0 no color
K black
C cyan
M magenta
Y yellow
1. Press to continue.
2. Turn the printer off and then
back on.
3. Reseat the connectors
between the laser/scanner
(J74 - J77) and DC controller
PCB (J1106 - J1109).
4. Replace the defective laser/
scanner assembly. Calibrate
the printer after replacing the
laser/scanner. See
Calibrate
now.
5. Replace the DC controller
PCB. Calibrate the printer
after replacing the DC
controller. See
Calibrate now.
Table 7-5. Numerical printer messages (HP Color LaserJet 5550 models) (continued)
ENWW Numerical printer messages 321