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#16
12-10-2011, 08:29 PM
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I have an almost identical set but it is a System 3. It uses the electronic type ultrasonic remote transmitter and the manual volume control knob is just to allow you to set the maximum volume level. It will do channel up/down, volume continuously up/down, power on/off and mute.
Also my '79 23" remote Chromacolor II is this way too. Zenith must have improved the remote receiver in these few years to change from either the 1-button or 4-button mechanical transmitter to the electronic transmitter. 
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