LG LSRG309ST Service Manual page 54

CHECKING FLOW CHART BY FAILURE
Oven does not heat, F-11
Yes
Power Off
1
Is the disconnect or loose
connector?
1. Between Main PCB and
Relay PCB (CN7, CN8)
2. Electric wiring of relay PCB (CN10)
3. Electric wiring of electric element
CN8 CN8 CN8 CN8 CN8 CN8 CN8
CN8 CN8 CN8 CN8 CN8 CN8
CN8 CN8 CN8 CN8
CN8 CN8 CN8 CN8 CN8
CN7 CN7 CN7 CN7 CN7
CN7 CN7 CN7 CN7
CN7 CN7 CN7 CN7 CN7 CN7
CN7 CN7 CN7 CN7 CN7 CN7 CN7
Gas Valve &
Drawer Heater
No
Reconnect or
Yes
repair the
connector
CN10 CN10 CN10
CN10 CN10 CN10 CN10 CN10 CN10
CN10 CN10 CN10 CN10 CN10 CN10
CN10 CN10 CN10 CN10
CN10 CN10 CN10
Gas Valve &
Drawer Heater
Bake glowbar
igniter
Power Off
2
Is the glowbar ignitor
normal?
Measure the resistance
of each glowbar
(The resistance is shown on next page)
Broil glowbar igniter
Yes
Power Off
3
Is the Gas valve normal?
Measure the resistance
of Gas valve
(The resistance is shown on next page)
Broil Gas Valve
1pin 1pin 1pin
1pin 1pin 1pin 1pin
1pin 1pin 1pin 1pin 1pin 1pin
1pin 1pin 1pin 1pin 1pin
3pin 3pin 3pin 3pin 3pin
3pin 3pin 3pin 3pin 3pin 3pin
3pin 3pin 3pin 3pin
3pin 3pin 3pin
Pin No.
1
4
10-5
No
Replace the
failed glowbar
Bake glowbar igniter
No
Replace the
Failed Valve
Bake Gas Valve
WH WH WH
WH WH WH WH
WH WH WH WH
WH WH WH WH WH WH
WH
N N N N N N N N N N N N N N N N N
N
2
3