Samsung RF4287HARS, Service Manual

Page: 77 / 132

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