Currently in operation is still a lot of TVs without systems remote control (sdes). If the owner has a VCR (VM) with the RMS, it is enough to configure the tuner to TV channels, the receiving antenna or from cable networks, and television - on the frequency of the output the RF signal VM (or plugging for bass, and then we toggle all programs remotely on the remote VM. So do many the owners of the VM with the RMS. But there remains another problem: both remotely and to turn on and turn off the TV?
This problem can be solved by using the following. When you turn off the VM the remote control is usually closed by one of the pretty powerful stabilizers (or electronic keys) in the power supply VM. Even without concepts, such the site is easy to find out turn off and turn on the voltage across a current limiting resistor of small resistance and apply this voltage on relay. The resistor is preferably set to prevent accidental short circuits. The relay is placed in the housing of the TV by connecting the contacts in parallel to its network the switch. Relays must be applied with a relatively high resistance the winding, so as not to overload the power supply VM. You should not forget also to install a diode parallel to the relay coil (cathode to positive voltage source) to protect VMS from EMF when it is off. As a result, the TV will be switched on and off as a switch, or relay contacts when you turn VM button or on the front panel, or remote control, and timer VM.
For example, if the use of VM "electronics - WMC you can apply relay rack-34 (passport CD 4.569.009-02, the winding resistance of about 470 Ohms), slightly loosening the adjusting spring. Control voltage +15 V is necessary to remove with pin 1 of the connector CN104, located on the cross-Board around the socket "Log LF", and through the resistor 27 Ohms and the power dissipation 0.25 W sue free contact a SCART cable. To him and contact General wire and connect wires to the relay coil connected in parallel with the diode. The protective diode - KD105B or any similar.
Very long operating time (about 10 years) have proven the safety of this connect to the VM. However, you must remember that if you want to record a television program using the timer VM, you should not forget to remove the network TV plug from the wall outlet, so he was not included. You can connect your contacts relay and in series with the mains switch on the TV, but in this case it will be impossible to use the TV without the VM. In addition, if the TV connected to VM by radio wave, the first button unit selection of TV programs you need to configure the frequency of the output channel of the VM, as this button has property priority when you turn on the TV.
Author: A. Ivkin, Istra, Moscow region.