Brother HL 5370DW, Service Manual

Page: 282 / 319

7-5 Confidential
1.3 Service Mode
The service mode is exclusively designed for the purpose of checks, settings and
adjustments, and this function should be accessed by service personnel only. You can
perform a print test and display the log information.
<Procedure>
<LED model>
(1) Check that the front cover is open.
(2) Turn ON the power switch while the [Go] button is held.
(3) After all LEDs on the panel are lit, only the Status LED goes out.
(4) Release the [Go] button and check that all LEDs are out.
(5) Press the [Go] button once or twice. (If the [Go] button is pressed, the Status LED is lit.
If the [Go] button is released, the LED is out.)
(6) Check that Toner/Drum/Paper LEDs are lighted.
(7) Press the [Go] button depending on the necessary number of times. Each mode starts
after 2 seconds. (If the [Go] button is pressed, the Status LED is lit. If the [Go] button is
released, the LED is out.)
<LCD model>
(1) Check that the front cover is open.
(2) Turn ON the power switch while the [Go] button is held.
(3) The message “ USERS MODE ” is shown on the LCD panel.
(4) Release the [Go] button and check that the Data LED is out. (Backlight is green.)
(5) Press the [Go] button once or twice. (If the [Go] button is pressed, the Data LED is lit. If
the [Go] button is released, the LED is out.)
(6) Check that the message “ USERS MODE ” is shown on the LCD panel with orange backlight.
(7) Press the [Go] button depending on the necessary number of times. Each mode starts
after 2 seconds. (If the [Go] button is pressed, the Data LED is lit. If the [Go] button is
released, the LED is out.
Press the [Go] button once.
Press the [Go] button again depending on the necessary number of times after check
that
Toner/Drum/Paper LEDs are lighted.
Press the [Go] button Mode
Once 9) Factory Inspection Mode
Twice 10) Continuous Grid Pattern Print Mode
Three times 11) Fixing Unit Test Print
Four times 12) NV-RAM Value Dump Mode
Five times 13) RAM Check
Six times 14) QA Test print
Seven times 15) DX setting (ON/OFF)
Eight times 16) Paper Size Setting (A4/Letter)
Nine times 8) PCB ONLY Mode
More than Ten times Go back to Normal State