Samsung RL-33EBMS TROUBLE DIAGNOSIS AND REPAIR SOLUTIONS
7. TROUBLE DIAGNOSIS & REPAIR SOLUTIONS
Mainboard inspection method
At the self-diagnosis stage, you must cut off and reconnect to the power for inspection.
The self-diagnosis codes are listed below
self-diagnosis codes:
NO
1
Refrigerating sensor
2
Main evaporator sensor
Freeze sensor
3
4
External sensor
Magnetic switch
5
ITEM
C C
DISPLAY
TROUBLE
Open circuit
short circuit
Open circuit
short circuit
Open circuit
short circuit
Open circuit
short circuit
Air door relay failure, or motor,
air door magnetic spring switch
or magnet trouble
Door switch
Refrigerating sensor
Refrigerating compartment
Freeze compartment
COMMENTS
Test temp. lower than -50
Test temp. higher than +85
Test temp. lower than -50
Test temp. higher than +85
Test temp. lower than -50
Test temp. higher than +85
Test temp. lower than -50
Test temp. higher than +85
Magnetic spring switch ON/OFF
is unable to be detected after 1
minute's run
Sensor resistance and core chip voltage and temp.
Resistance ResistanceResistance Resistance
Temp Temp
Voltage VoltageVoltage Voltage
Temp Temp
21
Primary Inspection
1. Prior to trouble settlement, check if the power socket is electrified and the connecting power
supply spec. is normal.
2. Check if the power botton on display is pressed or not.
3. If other troubles are found, please refer to the remarks on the next page to make an
inspection.
Start
Test the 7812 output woltage
Test the 7805 output woltage
Power on again
N
Is primary voltage of the
transformer ok ?
Y
Is secondary voltage of
Transformer ok ?
Y
Is display ok ?
Y
Replace the mainboard
subassembly
Y
Normal
N
Check and repair the
wire assembly
N
replace the transformer
N
Repair or replace the
display
22
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