Belmont-2A21-Sams-55-5电路原理图.pdf

PHOTOFACT* Folder BELMONT MODELS 22A21, 22AX21, 22AX22 VOL.CONT CONTRASTBRIGHTNESS ON-OFF SW. HIGH LOW BAND SW. VERT HOLD BELMONT MODEL 22A21 TRADE NAME MANUFACTURER TYPE SET TUBES POWER SUPPLY TUNING RANGE Belmont, Models 22A21, 22AX21, 22AX22 Belmont Radio Corp., 5921 W. Dickens Ave., Chicago 39, 111. Television Receiver Twenty-Two 105 - 125 Volts AC (60 Cycle) Channels 1 through 13 RATING1.55 Amps. 117 Volts AC TABLE OF CONTENTS Page Page Schematic Chassis-Top View Parts List and Description Alignment Instructions 2 Tuner 10 3 H. V. Power Supply-Bottom View 11 5,8,11 Chassis Bottom View-Capacitor Identification 13,16 6,7 Voltage and Resistance Measurements 14 Adjustment of Tuning Stops and Dial Indicator 7 Tube Placement Chart 15 Cabinet-Rear View 7 Chassis Bottom View-Resistor Identification 12,17 Disassembly Instructions 7 Block Diagram 18 Chassis Bottom View-Trans., Inductor and Alignment Identification 4,9 KJ to to Kg z X -i I X to to HOWARD W. SAMS AC Voltages measured at 1000 olrns. 2. Socket connections are shown as bottom views. 3. Measured values are from socket pin to com- . mon negative unless otherwise stated. 4. Line voltage maintained at 117 volts for voltage readings. 5. Front panels controls set at maximum. 6. Where readings may vary according to the setting of the service controls, both minimum and maximum readings are given. RadioFans.CN I8SST 1 H.V. RECT / ,20 T SOUND 2 NO. SOUND / -N ,- . i 6SNTCT HORIZ. OUTPUT BOTTOM VIEW r L_ i TUBE PLACEMENT CHART S13QOW 1NOW139 RadioFans.CN m oo I ST SOUND IF AMP V9 2ND SOUND IF AMP VIO AF AMP AF OUTPUT RATIO DETECTOR VII RF AMP MIXER OSC VIDEO AMP. VIDEO OUTPUT 1ST VIDEO IF AMP V4 2ND VIDEO IF AMP V5 VIDEO DET. iAGC V6 VERT. MULT. VERT. OUTPUT SYNC. CLIPPER 1/2 VI4 SYNC. LIMITER 1/2 VI4PICTURE TUBE V22 HORIZ. MULT. VIS HORIZ. OUTPUT VI6 H.V. OSC H,V. RECT L.V. RECT. VI9 BLOCK DIAGRAM RadioFans.CN