1. There is a possibility of electric shock, make sure to start repairing after turning off the power.
2. The lamp is a incandescent bulb which generates high heat, make sure not to get burn.
How to check
Take off the S/W and measure its
resistance at both of its terminals.It
should be ∞Ω and ∞Ω when the S/W is
Close and Open respectively.
1)Only ∞Ω is measured : S/W Short
2)Only ∞Ω is measured : S/W Open
Is the lamp
filament broken?
Is the contact
of the lamp socket
normal?
Does the contact
of the lamp bimetal
on and off normally?
Replace Lamp
Check Socket/Replace
Does it operate normally
after a certain time?
Replace Bimetal/
Replace Door
Replace Dispenser Pad
Replace Dispenser S/W
Check wires
Check wires
Replace PCB Main/
Replace PCB Case Ass'y
Does the Dispenser
Pad work normally?
Does the Dispenser
S/W on and off
normally?
Is a voltage out
put at PCB Case
CN7⑩-⑨
correct
?
Is the connection
between CN6⑩-⑨
and PCB Main
CN31⑥-⑤ secure?
Is the PCB Main
CN31⑥-⑤ circuit
normal?
Check Dispenser wiring and Check
&Repair the Lamp Socket
How to check
Measure the voltage at both of CN6
terminals.It should be 0V and 5V
when the S/W is Close and Open
respectively.
1) Only ∞Ω is measured : S/W Short
2) Only ∞Ω is measured : S/W Open
START
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
Caution
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