If Cover Ice Route Motor(Geard Motor) Is Not Working Normally - Samsung RF4287HARS Service Manual

AW3 SM-EN 2011.3.31 2:56 PM 페이지94 in
TROUBLESHOOTING

4-2-13. 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 Resistance is variable according to
the input voltage.
CN73 and CN74 combined and use same
connector(13P)
CN70 -"11" (Red) ↔ CN73 -"9" (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.
Start
Does GEARED MOTOR
work properly?
Is Cubed or Crushed
Ice mode selected on the
LED PANEL?
Is the DISPENSER
switch selected?
Does the wiring at the
both sides of motor connected
properly?
Is the AC input voltage
applied to the both ends
of the motor?
① Check CN73 -"9" Connector / Re-connect
② Check the short/open for the SSR75 of Cover Ice Motor on Main PCB.
③ Check the resistance of parallel Connector CN73 -"9", CN70 -"11"
(Definitely plug out prior to repair)
Is the sensing
SWITCH connection
normal?
Is the switch
pressed area normal when
motor rotates?
Are the voltage
ing Open
REG1 Heater Sink and CN50-"9",
5V 0V "10" normal?
5V 0V
No
Replace the MOTOR
Yes
No
Cubed or Crushed Ice is selected
Yes
on the LED PANEL PCB
No
Select the DISPENSER switch
Yes
No
Check the WIRE
Yes
Yes
Check the MOTOR/Check any
No
interference on MOTOR rotation
No
Check/Repair the Housing
Yes
connector
No
Check/Repair the Motor Rotation
Yes
pressing area
Yes
Normal
No
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