CHAPTER 7 SERVICE SUPPORT SOFTWARE
Confidential
7-8
(3) Activate each sensor listed below manually and verify that the
Status
LED (HL-
5240/5250DN) or the
Data
LED (HL-5270DN/5280DW) is lit. In the inspection mode,
the LED blinks once when the state of a sensor of a switch is changed from ON to
OFF, or from OFF to on. When the state is changed continuously, the LED keeps
blinking.
( Regist front sensor, Regist rear sensor, Paper eject sensor, New toner sensor,
Toner sensor, Front cover sensor, PE sensor, Edge sensor, MP PE sensor,
DX tray sensor )
Fig. 7-1
(4)
When the verification of all the sensors is completed, them the power off.
(2)
Continuous Grid Pattern Print Mode
This mode is to print a grid pattern continuously with a serial number on it. The number of
grid pattern prints is displayed at the same time.
The machine does not go back to the ready state unless the power is turned off and on.
To finish the continuous grid pattern print mode, press the
Job Cancel
button.
(3)
Fuser unit Test Print
This is to print the following three patterns to check the fuser unit.
・
Grid pattern with a serial number on it
・
Gray pattern
・
Black pattern
When this operation is completed, the machine automatically goes back to the ready
state.
(4)
NV-RAM Value Dump Mode
This is to collectively print the present state of the NV-RAM of all printers.
When this operation is completed, the machine automatically goes back to the ready
state.
Frame R
Toner LED PCB
(Light emission)
Toner sensor PCB
(Light reception)
New toner sensor
(Relay front PCB)
High-voltage PS PCB
Regist rear sensor
Regist front sensor
MP PE sensor
PE EG sensor
Edge sensor
PE sensor
Paper eject sensor
(Relay rear PCB)
Frame L
Front cover sensor
DX tray sensor
Chute