Samsung RF28HMEDBSR Service Manual Page 85

French door refrigerator.
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10) Mid Drawer Room Damper Heater has trouble (OPTION)
ERROR Code
Measure the voltage of Resistance
between ① - ② after
CN77 connector open / 1350 ohm ± 7%
Initial
power On Heater off
MICOM
#56
3.5V ~
3.5V ~
condition
4.8V
4.8V
☞ Checking method of Flex Zone Room Damper
resistance CN77-"1"(Black) ↔ "2"(Brown)
** Ω∞: Open (wire disconnection,
disconnection) trouble / 0Ω: Short trouble
Is Damper Heater
normal?(about135ohm)
Is MAIN PCB connector
(CN77) inserted correctly?
Working
heater
Is the input voltage of
IC01 MICOM #56 normal?
0V
Normal(recheck)
heater
85
TROUBLESHOOTING
Start
Start
NO
YES
YES
Bad contact of connector/ insert correctly
NO
YES
YES
NO
YES
YES
1) Wire connector
2) Replace Heater
1) Recheck the wire
2) Replace PCB MAIN

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