Failure Mode Flow Chart - LG LRE30755SW Service Manual

FAILURE MODE FLOW CHART

No display (No power)
Blank display
Enter key input
Some beep
sound?
Yes
Warming drawer
display blank?
Yes
Check voltage – Main PCB(009B) CN16 (Pin 11) and CN9(Pin1)
No
Check the thermal fuse
(See the page 3-1)
No
Check AC input voltage of Main PCB
-Main PCB CN2 (pin 1 and 3)
CN16(Pin11)
CN9(Pin1)
Main PCB(009B)
(-)4.5V ~ (-)5.5V ?
Yes
Replace the warming drawer
display PCB(011A)
END
Voltage should be
(-)4.5V ~ (-)5.5V
No
6-2
(Go to page 6-4)
Replace the main PCB(009A)
END
1