In Case Of R-Fan Do Not Run - Samsung SR-61KTC Service Manual

B. In case of R-FAN do not run.
① Check
START
Select Forced operation
FAN is operating condition to ROTRAY
S/W or SENSOR?
Does it uun after the door S/W pressed?
Does the door S/W works nomally?
Is MAIN PCB con70 connection O.K?
Output the MICOM pin#18 stghal?
Is 5V IC3(KA2657) #15 signal?
Chesk ssr (ssr72) change
MAIN PCB ASSY
－50－
Forced operation
Reference checked ROTARY S/W
and changed set up.
F-FAN O.K
Change DOOR S/W
Re-connection CON70
Change lead and MICOM chang PCB
IC3(KA2657) Failure