VINTAGE OWNER'S MANUALS, SERVICE MANUALS, BROCHURES AND PUBLICATIONS
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1951 Zenith Porthole Television Set Owners Manual (continued)
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You are viewing a low-resolution preview. Available here is the high-res/19 page PDF version of this document ($1.99), most printers can output this nearly identically to the original document.
Automated Summary of Text on this Page:
VERTICAL HOLD RANGE CONTROL
An auxiliary control to be adjusted for center range operation of the Vertical Hold Control.
BULLS EYE AUTOMATIC TUNING ADJUSTMENT.
Reduce signal input into receiver until sound and picture are barely per-ceptable. (This can be accomplished by loosely coupling a short length of 300 ohm line connected to antenna terminals of receiver to the antenna lead-in.) Set the FINE TUNING control for clearest sound and best picture on channel 7 or if no station is operating on this channel use the highest operating channel. This position should be at the midway point of the FINE TUNING control range. Then without further readjustment of the FINE TUNING control check to see that other stations come in correctly tuned.
If adjustment is necessary on other stations (allow approximately 30 seconds for local oscillator to warm-up on each channel) it is to be made with the built-in CHANNEL OSCILLATOR ADJUSTMENT WRENCH. This wrench must be pushed in to engage oscillator slug.
SOUND ADJUSTMENTS.
If some "Buzz" is apparent adjust BUZZ CONTROL for minimum "Buzz" and, if necessary, QUADRATURE and TAKE-OFF COILS for best quality sound. QUADRATURE and TAKE-OFF COIL adjustments must be made on an attenuated signal.
A.G.C. DELAY ADJUSTMENT.
This control is set at the factory for operation of the receiver in normal metropolitan areas. In fringe areas this control is to be adjusted for best sync and most noise-free picture at site of installation.
You are viewing a low-resolution preview. Available here is the high-res/19 page PDF version of this document ($1.99), most printers can output this nearly identically to the original document.
Automated Summary of Text on this Page:
VERTICAL HOLD RANGE CONTROL
An auxiliary control to be adjusted for center range operation of the Vertical Hold Control.
BULLS EYE AUTOMATIC TUNING ADJUSTMENT.
Reduce signal input into receiver until sound and picture are barely per-ceptable. (This can be accomplished by loosely coupling a short length of 300 ohm line connected to antenna terminals of receiver to the antenna lead-in.) Set the FINE TUNING control for clearest sound and best picture on channel 7 or if no station is operating on this channel use the highest operating channel. This position should be at the midway point of the FINE TUNING control range. Then without further readjustment of the FINE TUNING control check to see that other stations come in correctly tuned.
If adjustment is necessary on other stations (allow approximately 30 seconds for local oscillator to warm-up on each channel) it is to be made with the built-in CHANNEL OSCILLATOR ADJUSTMENT WRENCH. This wrench must be pushed in to engage oscillator slug.
SOUND ADJUSTMENTS.
If some "Buzz" is apparent adjust BUZZ CONTROL for minimum "Buzz" and, if necessary, QUADRATURE and TAKE-OFF COILS for best quality sound. QUADRATURE and TAKE-OFF COIL adjustments must be made on an attenuated signal.
A.G.C. DELAY ADJUSTMENT.
This control is set at the factory for operation of the receiver in normal metropolitan areas. In fringe areas this control is to be adjusted for best sync and most noise-free picture at site of installation.
Page 16 of 19