Samsung RF28HDEDBSR Service Manual page 99

TROUBLESHOOTING
4-2-15. If Cover Ice Route Motor(Geard Motor) is not working normally
Caution
1. When replacing the Cover Ice Motor, pull out the plug to avoid an electric shock.
2. Be careful! When disassemble the Cover Ice Motor, spring can jumped out and may cause personal injury.
3. Motor will rotate continuously when the Motor Switch is not sensed.
☞ Checking Mehod of Cover Ice Route Motor
Resistance
(Make sure to work after Power Off)
the voltage of Resistance is variable
according to the input voltage.
CN70 -"5" (Red) ↔ CN73_1 -"3" (Blue)
** 0Ω: Short trouble / Ω∞: Open trouble
When the MOTOR
rotates.
Operating Condition of Dispenser
Open/Close
CN50 - Switch 1,2 Operating
Close
Ice Route Switch 1
0V
CN50 - "9" (Purple)
Ice Route Switch 2
0V
CN50 - "10" (White)
① Main PCB - Check the wire OPEN/SHORT between the Cover Ice Motor Rotation sensing switches.
② Check the Short of Cover Ice Motor Control Circuit SSR75 in the MAIN PCB.
③ Replace the MAIN PCB or the Dispenser Cover Motor.
Does GEARED MOTOR
Is Cubed or Crushed
Ice mode selected on the
Is the DISPENSER
switch selected?
Does the wiring at the
both sides of motor connected
Is the AC input voltage
applied to the both ends
① Check CN73_1-"3" Connector / Re-connect
② Check the short/open for the SSR75 of Cover Ice Motor on Main PCB.
③ Check the voltage of Resistance of parallel Connector CN73 -"3",
CN70 -"5"
(Definitely plug out prior to repair)
SWITCH connection
pressed area normal when
ing Open
J23 JUMMPER and CN50-"9",
5V 0V
5V 0V
Start
No
work properly?
Replace the MOTOR
Yes
No
LED PANEL?
Cubed or Crushed Ice is selected
Yes
on the LED PANEL PCB
No
Select the DISPENSER switch
Yes
No
properly?
Check the WIRE
Yes
Yes
of the motor?
Check the MOTOR/Check any
No
interference on MOTOR rotation
No
Is the sensing
normal?
Yes Check/Repair the Housing
connector
No
Is the switch
motor rotates?
Check/Repair the Motor Rotation
Yes
pressing area
Yes
Are the voltage
"10" normal?
No
99
Normal