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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Automated Summary of Text on this Page:
Technical Adjustments
All Zenith receivers are adjusted at the factory prior to shipment but due to handling and because of the varying conditions encountered in different locations may require some readjustments occasionally of the controls outlined and identified on the following pages.
BECAUSE OF THE TECHNICAL NATURE OF THE FOLLOWING ADJUSTMENTS AND BECAUSE OF THE DANGER INVOLVED DUE TO THE HIGH VOLTAGES USED THEY ARE TO BE MADE ONLY BY A QUALIFIED TELEVISION TECHNICIAN. OWNERS SHOULD NOT ATTEMPT TO MAKE THESE ADJUSTMENTS.
BEAM BENDER - Set for maximum brilliance and minimum shadow on picture tube screen.
DEFLECTION YOKE-If picture is tilted loosen Deflection Yoke locknut and rotate yoke to point where picture is level on screen.
HEIGHT AND VERTICAL LINEARITY CONTROLS-To be adjusted on test pattern with Picture Control Switch set for Giant Circle picture to obtain a linear pattern covering screen vertically. (See Fig. 15.)
WIDTH, HORIZONTAL DRIVE AND HORIZONTAL LINEARITY CONTROLS - To be adjusted on test pattern to obtain full width and best horizontal linearity. (See Fig. 15.)
NOTE: Picture must be refocused when setting of horizontal drive control is changed.
FOCUS ADJUSTMENT
"B" Screen Receivers-Focus adjusted by means of the shunt ring at rear of permanent magnet centering assembly.
"C" Screen and larger-Focus adjusted with Focus Control at rear of chassis.
Adjust focus control for best picture definition.
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:
Technical Adjustments
All Zenith receivers are adjusted at the factory prior to shipment but due to handling and because of the varying conditions encountered in different locations may require some readjustments occasionally of the controls outlined and identified on the following pages.
BECAUSE OF THE TECHNICAL NATURE OF THE FOLLOWING ADJUSTMENTS AND BECAUSE OF THE DANGER INVOLVED DUE TO THE HIGH VOLTAGES USED THEY ARE TO BE MADE ONLY BY A QUALIFIED TELEVISION TECHNICIAN. OWNERS SHOULD NOT ATTEMPT TO MAKE THESE ADJUSTMENTS.
BEAM BENDER - Set for maximum brilliance and minimum shadow on picture tube screen.
DEFLECTION YOKE-If picture is tilted loosen Deflection Yoke locknut and rotate yoke to point where picture is level on screen.
HEIGHT AND VERTICAL LINEARITY CONTROLS-To be adjusted on test pattern with Picture Control Switch set for Giant Circle picture to obtain a linear pattern covering screen vertically. (See Fig. 15.)
WIDTH, HORIZONTAL DRIVE AND HORIZONTAL LINEARITY CONTROLS - To be adjusted on test pattern to obtain full width and best horizontal linearity. (See Fig. 15.)
NOTE: Picture must be refocused when setting of horizontal drive control is changed.
FOCUS ADJUSTMENT
"B" Screen Receivers-Focus adjusted by means of the shunt ring at rear of permanent magnet centering assembly.
"C" Screen and larger-Focus adjusted with Focus Control at rear of chassis.
Adjust focus control for best picture definition.
Page 14 of 19