Samsung AZ09AATEA Service Manual page 35

Troubleshooting
5-2-5 When the air swing motor is not operated
1) Check points
(1) Is the voltage of the power source normal ? (the rating voltage ±10% range. )
(2) Is the electric wire in good contact ?(CN71, RY71)
(3) Is the swing motor connector in good contact?(CN71)
(4) Is the terminal connected to the swing motor in good contact?
(5) Is the output voltage of the IC01(KA7812) and IC02(KA7805) normal?
Turn off the power, and then turn it on again five
seconds later.
Dose the buzzer sound, when the power on?
Check whether the "COOLING" LED lamp is on, and the
operation starts when pressing the ON/OFF
button of the remocon?
Does the air-swing motor operate when
pressing the air-swing button of the remote control?
Is the IC03 output normal?
- When the air-swing motor is on, IC03
No. 11 pin Low
Does the relay(RY 75) operate normally?
- When the air-swing motor is operated, the
RY75 should be operated.
Is the air-swing motor normal?
Replace the air-swing motor.
5-6
Y
Y
N
Y
Y
Y
N
Go to the clause "No power".
Go to the clause of "when the remocon
N
dose not operated"
Y
Normal operation.
• Check the IC03 for a short and cold
N
soldering.
• Replace the IC03.
• Check the relay coil resistance.
N
(Normal: About 400Ω)
• Replace the relay.
N
• Check the air-swing motor resistance.
(0Ω : short, ∞Ω : open)
Samsung Electronics