Search service manual. B20 MN General Guidance An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation. If any fuse or Fusible Resistor in this TV receiver is blown, replace it with the specified.
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This frequent malfunction concerns not only this TV , but all televisions. Most often, electrolytic capacitors dry out, which is why some TV sets start with difficulty at first, then they stop switching on completely. Therefore, for any repairs, it is desirable to check the capacitors in the power supply and, if necessary, replace them. With increased voltage on the drain sweep, the secondary power supply from the TDX also produces overstated voltages.
As a result, in this model the zener diode ZD at 12 volts breaks down - short-circuiting the case. In the rectifier circuit there are two resistors R 0,68 Ohm and R 3,3 Ohm , some of which necessarily will burn. The TV will not work, but the power supply will give an increased voltage to the whole TV and can burn much. Instead of the zener diode ZD, you can not put KREEN , as in the event of a power failure, it will not fail, and other details-horizontal line filter filter capacitors, horizontal output transistor, TDX and other details.
In general, because of the increased voltage on the line scan - there is increased radiation of the kinescope, which, as you know, leads to a deterioration in health. Thus, the failure of the Zener diode ZD speaks first of all of the failure of the power supply. And if there is a Krenka ,. Such a scheme of the TV, but it can be improved by placing a protective avalanche diode R2K or R2M on the chain of volts - supply of urgent sweep. With such a defect, if it does not, the chip of the frame scan LA, which is powered by a voltage of 25 volts from the TDX, is out of order.
In general, we can say that with such a malfunction, it almost always flies. And if there is a Krenka , then, apart from the burnt parts, the customer also receives radiation from the kinescope. Well, if very unlucky, then the processor on the ANK chip may fail. How to connect Samsung Smart TV to wifi? How to use Smart TV?
AKAI TV Schematic Diagrams, Service Manuals For Free Download
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Download service manual TV Akai CT-1407D (power supply)
If you get stuck in repairing a defective appliance download this repair information for help. See below. Good luck to the repair! Please do not offer the downloaded file for sell only use it for personal usage! Looking for other manual?
Replacement remote control Akai CT 1407 D for Televisions | $ 24.51 + VAT
We have the original remotes for every model of television, as well as the equivalents, which can replace the original. Shopping cart. Click to enlarge. Available in stock. Satisfaction Guaranted or your money back. Description Remote control to replace the original and all its functions.