Samsung AW078AA - Page 29

5-6 Samsung Electronics
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.
Replace the air-swing motor.
Dose the buzzer sound, when the power on?
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.
Go to the clause "No power".
Normal operation.
• Check the IC03 for a short and cold
soldering.
• Replace the IC03.
• Check the relay coil resistance.
(Normal: About 400Ω)
• Replace the relay.
• Check the air-swing motor resistance.
(0Ω : short, ∞Ω : open)
N
Y
N
Y
Y
Is the air-swing motor normal?
Y
Y
N
Check whether the “COOLING ICON” LED lamp is on,
and the operation starts when pressing the ON/OFF
button of the remocon?
Go to the clause of “when the remocon
dose not operated”
Y
N
N
N
DB98-04511A(1)-2 3/20/02 2:25 PM Page 5-6