Lexmark E260 Series, Service Manual

Page: 82 / 192

2-54
Lexmark™ E260, E260d, E260dn
4513-200, -220, -230
Dead machine service check
CAUTION: Check the AC line voltage. The voltage should be within the following limits:
•
100 V ac (volts alternating current): 127 V ac for the 110 V printer
•
200 V ac: 240 V ac for the 220 V printer
Fuser service check
When toner is partially fused to the media, it is usually caused by low fuser temperature.
The line voltage to the printer must be within the following limits:
•
100 V ac: 127 V ac for the 110 V model printer
•
200 V ac: 240 V ac for the 220 V model printer
This printer uses a belt fuser and therefore does not have a lamp.
FRU Action
LVPS/HVPS
Unplug the printer. Remove the LVPS/HVPS, and check the fuses for continuity.
• If open, then replace the LVPS/HVPS.
• If not open, then check the switch continuity across its conductors with the switch on.
Turn the switch off. Plug the AC line into the LVPS/HVPS, and switch unit on.
Note: AC voltages are exposed at several places on the board. Do these verifications, and
then unplug the AC cord from the power supply:
•
Verify 24 V dc on pins 6, 17, and 19 at CN201.
•
Verify approximately 5V on pins 1-5, 11, 13, and 15.
•
If voltages are not correct, then replace the LVPS/HVPS.
•
If voltages are correct, then check the controller board. See “Controller
board removal” on page 4-6 .
Fuser service check
FRU Action
Fuser power cable
LVPS/HVPS
Fuser
Unplug the printer, and disconnect the fuser cable plug from the LVPS/HVPS board
connector at CN102.
Check for continuity across the fuser by checking across the connector pins.
• If there is continuity, then check the LVPS/HVPS. See “LVPS/HVPS service check”
on page 3-55 .
• If there is no continuity, then disconnect the fuser power cable at both ends and check
each conductor for continuity. Replace cable if necessary.
• If the cable tests good, then replace the fuser.
Reconnect the cables, turn the printer on, and at &12, check for approxi5 V dc on
pin 1 and ground on pin 2. If line voltage is incorrect on pin 1, then see
“Controller board
service check” on page 2-52 for more information.
Fuser
Disconnect the thermistor cable from J12 on the controller board.
Measure the resistance across the ends of the thermistor cable.
Replace the fuser assembly if the resistance is lower than 1K ohm or shorted.
Note: Resistance measures approximately 400K ohms when cool and 1K ohms hot.