Brother HL-5240 Service Manual page 296

CHAPTER 7 SERVICE SUPPORT SOFTWARE
(3)
Frame L
Paper eject sensor
(Relay rear PCB)
DX tray sensor
New toner sensor
(Relay front PCB)
Toner sensor PCB
(Light reception)
(4)
(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.
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.
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 )
Front cover sensor
Regist rear sensor
High-voltage PS PCB
When the verification of all the sensors is completed, them the power off.
Grid pattern with a serial number on it
Gray pattern
Black pattern
Chute
Regist front sensor
Fig. 7-1
7-8
Frame R
Toner LED PCB
(Light emission)
MP PE sensor
PE EG sensor
PE sensor
Edge sensor
Confidential