Question about Kitchen Ranges
Install a new cooling fan to the bottom of your unit ,this will keep your heat sink cool
Posted on Feb 25, 2013
Posted on May 26, 2011
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This can be due to many faults as the VCR function has not come back to the MODE STOP/REST /CONDITION and so the processor tends to drive the mechanism to complete to the mode .
Hence please check up with these tips.
1. If the cassette does not loads or if the cassette is locked inside then the machine will shut as the loadind or the servo is defective.
2. If the in detect is not working then the opto devices or proximity sensors/magnetic type can be faulty.
3. If the drum does not rotate it will shut down as well a fault in the SERVO section.
4. Defective HALL IC can shut the switching and so the servo will shut down the processor.
5. Fault in the power section to deliver the correct voltage to the circuits/loading servo to take up.
6. Finally if the loading is not to the MODE switch point or failure of mode can make the loading to trip as it will not complete the load to the desired point.
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The following conditions will cause the Protection LED to go on:
• Initial power-up: For approximately five seconds after initial power-up, the relay
speaker connection circuitry is deactivated and the speaker output is muted. If everything is operating normally, you will hear an audible click at the conclusion of this brief period, as the circuitry is activated and the Servo 120a begins delivering signal to connected speakers (at which point the Speaker LED will light if the Speaker on/off switch is in its "in" position). It is normal for the Protection LED to fade gradually after the amplifier is powered off.
•Overheating: A temperature sensing device in the Servo 120a will cause the relay speaker connection circuitry to be activated (and the Protection LED to go on) whenever the operating temperature of the unit rises above a safe level. To guard against this problem, make sure the Servo 120a receives adequate ventilation on all sides ; in extreme environmental conditions, you may also
want to consider the use of cooling fans.
•Severe overcurrent conditions: This occurs whenever the signal being output
from the Servo 120a rises to a level above 20% THD (Total Harmonic Distortion).
•Shorted speaker cables: This will occur if, due to faulty wiring, the hot and ground signals being output by the Servo 120a short to one another.
•Output impedance drops below 2 ohms: This can occur if the Servo 120a is connected to inappropriate speaker systems (see the "Setting Up and Using the Servo 120a" section in this manual for more information).
•DC voltage detected at speaker output: The most likely cause of this is an internal failure. In general, any time the Protection LED lights up (other than during the approximately five seconds following initial power-up), there is reason to be concerned. If this occurs, turn the Servo 120a off immediately and carefully check all wiring and external devices in order to locate and correct the condition that caused the LED to light up in the first place.
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