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Knock on door lamp doesn’t work
1
Yes
No
Explain to
customer
2
Check the door S/W resistance.
Is it correct compared with table?
No
Yes
Change the
Door S/W
The PCBA senses if knock on or
knock off
When the knock on, lamp on
When the knock off, lamp off
Resistance [Ω]
Door S/W
No magent near
the switch
Infinity
Magnet is near
the switch
0
Check the PCB Voltage.
is CON10 2th pin ~ 3th pin
voltage 11.4 ~ 12.6V?
(While Knock on)
is CON10 4th pin ~ 6th pin
4.75~ 5.25V?
No
Yes
CON10
Change the
PCB
3
5
No
Yes
LED Lamp
Explain to customer
Check the LED Lamp voltage.
Is it 11.4 ~ 12.6V?
(While Knock on And Magnet is
near the switch)
Change the
LED Lamp
6
4
Check the Knock on
signal voltage.
Is it 0~ 2V? (While Knock on
And Magnet is near the switch)
No
Yes
Change the
Knock on
sensor
Home Bar Door S/W
Voltage [V]
CON10 2
th
pin ~ 3
th
pin 11.4 ~ 12.6V
CON10 4
th
pin ~ 6
th
pin 4.75 ~ 5.25V
Knock on sensor
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