Samsung RF4287HARS Service Manual page 77

AW3 SM-EN 2011.3.31 2:56 PM 페이지78 in
TROUBLESHOOTING
10) Mid Drawer Room Damper Heater has trouble
ERROR Code
Measure the resistance
between ⑥-⑩ after
CN77 connector open 135ohm ± 7%
MICOM
#48
condition
☞ Checking method of Flex Room Damper
resistance CN77-"1"(Black) ↔ "2"(Brown)
** ∞Ω: Open(wire disconnection,
heaterdisconnection) trouble / 0Ω: Short trouble
Initial Working
power On Heater off
heater
3.5V ~ 3.5V ~
0V
4.8V 4.8V
Is Tank Water Heater
normal?(about72ohm)
Start Start
NO
Is Damper Heater
normal?(about135ohm)
YES YES
Bad contact of connector/ insert correctly
NO
Is MAIN PCB connector
(CN77) inserted correctly?
YES YES
NO
Is the input voltage of
IC01 MICOM #48 normal?
YES YES
Normal(recheck)
78
1) Wire connector
2) Replace Heater
1) Recheck the wire
2) Replace PCB MAIN