Trouble Shooting Procedures - Emerson SMARTSET CKS1708 Service Manual

TROUBLE SHOOTING PROCEDURES

Before overhauling a clock radio, you should judge the breakdown and the cause correctly, then you can repair it with
corresponding ways. The overhauling must be proceed in order, any hasty conclusion is not recommendable, otherwise
overworking would be done when repair. The microwave oven may occur compound breakdown due to all kinds of different
reasons, thus, when overhaul, they all should be taken into consideration. Special attention must be given to the radio leakage
and the electric insulation when examine because they may do harmful to the repairing staff.
1.MEANS OF THE BREAKDOWN EXAMINING
How to examine a radio with breakdown? A better means which demonstrated in practical operating are through inspecting
and listening. On the basis of large amounts of perceptual knowledge, you can judge and analysis the breakdown quickly and
correctly.
1. Inspection.
Inspect whether the radio is disordered and where is the disordered position, if any. If the display s h o w t h e t i m e , i f t h e
no dis pla y, maybe the LED no power, check the AC power cord whether plug in outlet
Listening to the voice of the radio operating and the noise of the speaker after it conducted.
The signal ，The sound is clearly， noise should be consider as normal. But it is abnormal if the following noise occurred:
(1) Sound "high or small " noise.
(2) Long time "shishi" noise.
(3) Strike voice like "kaka".
2. Examine when the radio is operating, but the radio no signal.
Remove the radio to adjust location until the radio reception the signal .
Before repairing, check whether the above listed point are existed, if not, you can start the clock radio.
5-3
Turn on radio AM or FM reception