Philips EP 4300 Series Service Manual page 37

Test mode
Sequence of
actions by user
L8 Blu ON in UI panel +
BoxK8 Blu in Display +
Press button K8
Hear the feedback sound.
L8 Green ON in UI panel +
BoxK8 Green in Display +
Press button K8
Hear the feedback sound.
Reaction of the appliance
PASS
L8 OFF & BoxK8 Blu
L8 (!W) ON & BoxK8 Blu
Other Lx toggle
Other BoxKx Blu
It's not possible to hear
the sound
The sound is persistent
L8 OFF & BoxK8 Green
L8(!W) ON & BoxK8
Green
Other Lx toggle
Other BoxKx Green
It's not possible to hear
the sound
The sound is persistent
FAIL Cause of failure
L8 damaged
L8 wrong color
Short circuit in Led
Short circuit in Buttons
The drive of the Buzzer
or the Buzzer in the
Main is damaged
The drive of the Buzzer
or the Buzzer in the
Main is damaged
L8 damaged
L8 wrong color
Short circuit in Led
Short circuit in Buttons
The drive of the Buzzer
or the Buzzer in the
Main is damaged
The drive of the Buzzer
or the Buzzer in the
Main is damaged
Solution
Change UI boad
Change UI boad
Change UI boad
Change UI board
Change Main
Board
Change Main
Board
Change UI board
Change UI board
Change UI board
Change UI board
Change Main
Board
Change Main
Board
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