
TROUBLESHOOTINGTROUBLESHOOTING
4-2-12. When refrigerator ROOM Lamp does not light up4-2-12. When refrigerator ROOM Lamp does not light up
When controlling the regrigerator light with Regulator(12V) : When controlling the regrigerator light with Regulator(12V) :
Applying to the F/R Room Applying to the F/R Room
compartment (Option)compartment (Option)
table Lamp does not work properly, check the table Lamp does not work properly, check the
R compartment LED Lamp because it is connected withR compartment LED Lamp because it is connected with
the R compartment LED Lamp in parallel. Refer to the R compartment LED Lamp in parallel. Refer to
the circuit diagram to repair.the circuit diagram to repair.
1) Measuring output voltage1) Measuring output voltage
- Measuring the - Measuring the
Ground REG1-GND and Ground REG1-GND and
voltage( CN78-"3"(Red)/R LED), Q714 voltage (CN78-"1"(Brown)/F LED)voltage( CN78-"3"(Red)/R LED), Q714 voltage (CN78-"1"(Brown)/F LED)
Checking method of Door switch voltage.Checking method of Door switch voltage.
- Measuring voltage of CN76-"12")(Purple)- Measuring voltage of CN76-"12")(Purple)
typical Ground REG1-GNDtypical Ground REG1-GND
PCB Typical GroundPCB Typical Ground
R LED Lamp ONR LED Lamp ON
R LED Lamp OFR LED Lamp OF
Check/Replace REED S/W,Check/Replace REED S/W,
sense properly?sense properly?
Replace/Repair the PCBReplace/Repair the PCB
Replace/Rep air the PCB.Replace/Rep air the PCB.
Check the connector terminalCheck the connector terminal
connector terminalconnector terminal
Replace LED LAMPReplace LED LAMP
Check the wireCheck the wire
Re-insert the connectorRe-insert the connector
Is the outputIs the output
voltage of IC01 MICOM #59voltage of IC01 MICOM #59
Is the outputIs the output
voltage of Q715voltage of Q715
PCB connector(CN78) insertedPCB connector(CN78) inserted
Does the MAINDoes the MAIN
PCB connector(CN78) output properly?PCB connector(CN78) output properly?
Is the LED LAMPIs the LED LAMP
connected properly?connected properly?
Is the LED LAMP noIs the LED LAMP no
Door & MICOM StateDoor & MICOM State
Right and LeftRight and Left
Q715(R)/Q714(F) StateQ715(R)/Q714(F) State
Q715(R)/Q714(F)Q715(R)/Q714(F)