US-Television-T-10823-Sams-89-15电路原理图.pdf

PHOTO FACT* Folder U. S. TELEVISION MODEL T-1O823 HOR. HOLD CONTROL VERT. HOLD CONTROL VOLUME CONTROL ON-OFF-SW BRIGHTNESS CONTROL CONTRAST CONTROL FINE TUNING STATION SELECTOR TRADE NAME U. S. T. Model T-10823 MANUFACTURER United Stated Television Mfg. Corp., 3 W. 61st St., New York, New York TYPE SET Television Receiver TUBES Twenty Five POWER SUPPLY 110-120 Volts AC-60 Cycle TUNING RANGE-Channels 2 thru 13 RATING 2.6 Amp. at 117 Volts AC Alignment Instructions 6, 7 Block Diagram 20 Disassembly Instructions 19 Horizontal Oscillator Adjustment 19 Parts List and Description 16,17,18 INDEX Photographs Cabinet-Rear View. 19 Capacitor Identification 11, 22 Chassis-Top View 3,13 High Voltage Supply 13 Photographs (continued) RF Tuner (RCA) 10 RF Tuner (Standard Coil) 15 Resistor Identifications 12, 21 Trans., Inductor and Alignment Identification . 4, 9 Schematic 2 Schematic (Standard Coil Tuner) 14 Tube Placement Chart 5 Voltage and Resistance Measurements 8 HOWARD W. SAMS vent erroneous indications. If the set has a Standard Coii Tuner, the channel switch to channel 13 to disable the local oscillator. Al,A2Adjust for MINIMUM deflection. Adjust for maximum deflection. input of the oscilloscope for horizontal deflection. 3NNECT SCOPE imp. to-Point side to chas- 5ENERATOR AND VTVM A12.A13, Check for response curve similar to Fig 1. If necessary retouch Al thru A9 lor opti- mum response. Adjust for maximum deflection. Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. Adjust for maximum deflection. !ATOR AND OSCItLOSCOPE lawtooth voltage in scope for horizontal deflection. 3NNECT SCOPE imp. to Point side to imp. to Point side to FUNER) A12,A13, A14.A15 A10, All Adjust for maximum amplitude and symmetry as per Fig 2. Adjust All so 21. 25MC occurs at center of crossover lines as per Fig 3. Adjust A10 for maximum amplitude and straightness of crossover lines. Continue with step 13. iis, using the shortest possible leads, ance, usually 50 ohms. DNNECT SCOPE imp. thru i Point le to chassis. A16.A17 A18,A19 A20.A2, A22.A23 Adjust for response curve similar to Fig 4 with markers above 70%. Check for response curve similar to Fig 4. If markers are below 70% on any channel make slight adjustment of A16, A17, A18, A19, with channel selector set for that channel. Recheck all high band channels to see that they have not been seriously effected. Adjust for response curve similar to Fig 4 with markers above 70%. Check for response curve similar to Fig 4. If markers are below 70% on any channel make slight adjustment of A20, A21, A22 and A23 with channel selector set for that channel, Recheck all low band channels to see that . they have not been seriously effected. FIG 2 FIG.3 FIG.4 ALIGNMENT RF OSCILLATOR ALIGNMENT POINTS CRCA TUNERJ OSCILLATOR DUMMY ANTENNA Twol25SJ carbon res. SIGNAL GENERATOR COUPLING Across antenna termin- als with 125SJ in each lead. SIGNAL GENERATOR FREQUENCY 215.75MC (Unmod.) 209.75MC 203.75MC 197.75MC 191. 75MC 185.75MC 179.75MC 87.75MC 81.75MC 71.75MC 65. 75MC 59.75MC CHANNEL 13 12 11 10 9 8 7 6 5 4 3 2 DC Cc WAVE TRAP i Wave traps ASS and A39 are used for specific types of interfe tuned to the channel having the interference set fine tuning contr in the picture and sound, keeping the cores at approximately the ference. RF AND MIXER A Replace the channel 13 segment of the tuner turret. Th e sweep generator output lead should be terminated with its c DUMMY ANTENNA Two 125SJ carbon res. SWEEP GENERATOR COUPLING Across antenna termin- als with 125fi in each lead. SWEEP GENERATOR FREQUENCY 207MC (10MC SWP) 213MC (10MC SWP) 201MC (10MC SWP) 195MC (10MC SWP) 189MC (10MC SWP) 183MC (10MC SWP) 177MC (10MC SWP) 8 SMC (10MC SWP) 79MC (IOMC SWPJ_ 69MC (IOMC SWP) 63MC (IOMC SWP) 57MC (IOMC SWP) MARKER GENERATOR FREQUENCY 205.25MC 209.75MC 211.25MC 215. 75MC 199. 25MC 203.75MC 193.25MC 197.75MC 187.25MC 191.75MC 181. 25MC 185. 75MC 175. 25MC 179.75MC 83. 25MC 87.75MC 77.25MC 81. 75MC 67. 2 SMC 71. 75MC 61.25MC 65.75MC 55.25MC 59.75MC e as the channel selector switch is tun DUMMY ANTENNA Two 125S! carbon res. SIGNAL GENERATOR COUPLING Across antenna termin- als with 125S2 in each lead. SIGNAL GENERATOR FREQUENCY 215.75MC (Unmod.) DC Co RadioFans.CN ALIGNMENT INSTRUCTIONS CCONTJ OSCILLATOR ALIGNMENT (RCA TUNER) GNMENT POINTS JEFO DUMMY ANTENNA Two 12X carbon res. SIGNAL GENERATOR COUPLING Across antenna termin- als with 125S1 in each lead. SIGNAL GENERATOR FREQUENCY 215.75MC (Unmod.) 209. 7 SMC 203.75MC 197.75MC 191.75MC I85.75MC 179.75MC 87.75MC 81.75MC 71. 75MC 65.75MC 59.75MC CHANNEL 13 12 1 10 9 8 7 6 5 4 3 2 CONNECT VTVM DC Probe to Point Common to chassis. ADJUST A24.A25 A26 A27 A28 A29 A30 A31 A32, A33 A34 A3 5 A36 A37 REMARKS Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. Keep slug pairs at approximately the same relative position. Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. Keep slug pairs at approximately the same relative position. Adjust f reading setting. or zero reading. A positive and negative will be obtained on either side of the correct WAVE TRAP ADJUSTMENT (RCA TUNER) Wave traps A38 and A39 are used for specific types of interference and their alignment will depend upon the type encountered. With the receiver tuned to the channel having the interference set fine tuning control until interference is at maximum. Adjust A38 and A39 for minimum interference in the picture and sound, keeping the cores at approximately the same relative position. Turn one core 1/2 turn, adjust the other for minimum inter- ference. RF AND MIXER ALIGNMENT (STD. COIL TUNER) Replace the channel 13 segment of the tuner turret. The sweep generator output lead should be terminated with its characteristic impedance, usually 50 ohms. DUMMY ANTENNA Two 125S! carbon res. SWEEP GENERATOR COUPLING Across antenna termin- als with 125SJ in each lead. SWEEP GENERATOR FREQUENCY 207MC (10MC SWP) 213MC (10MC SWP) 201MC (10MC SWP) 19 SMC (10MC SWP) 189MC (10MC SWP) 183MC (10MC SWP) 177MC (IOMC SWP) 85MC (IOMC SWP) 79MC (IOMC SWP) 69MC (IOMC SWP) 63MC IIOMC SWP) 57MC (IOMC SWP) MARKER GENERATOl FREQUENCY 205.25MC 209.75MC 211.25MC 215.75MC 199.25MC 203.75MC 193. 25MC 197.7SMC 187. 25MC 191.75MC 181.25MC 185.75MC 175. 25MC 179.75MC 83.25MC 87.75MC 77.25MC 81.75MC 67. 25MC 71. 75MC 61. 25MC 65.75MC 55.25MC 59. 7 SMC CHANNEL 12 13 11 10 9 8 7 6 5 4 3 2 CONNECT SCOPE Vert. Amp. thru 10KSJ to Point Low side to chassis. ADJUST A501, A502, A 503 REMARKS Adjust for response curve similar to Fig 4 with markers above 70%. Check for response curve similar to Fig 4 with markers above 70%. Check for response curve similar to Fig 4. If optimum response is desired for any channel, make slight adjustment of A501, A502, A503 with channel selector set for that channel. Recheck all channels to see that they have not been seriously effected. OSCILLATOR ALIGNMENT ( STD. COIL TUNER) Complete oscillator alignment mav not be necessary. If all channels seem to be off frequency approximately the same amount, for a majority of the channe s, it may be possible to correct them in one step using A504. It should be noted that this is an all channel oscillator circuit adjustment and should not be adjusted for any individual channel. If adjustment of A504 will not bring all channels within the range of the fine tuning control, it will be necessary to use the individual channel oscillator adjustment for each channel that is off frequency. The individual oscillator adjustments are reached through a hole just to the right of the channel switch shaft. The correct adjustment screw is accessible through this hole as the channel selector switch is turned to each channel. DUMMY ANTENNA Two 125R carbon res. SIGNAL GENERATOR COUPLING Across antenna termin- als with 125SJ in each ead. SIGNAL GENERATOR FREQUENCY 215.75MC (Unmod. ) 209.75 203.75MC 197.75MC 191.75MC 185.75MC 79.75MC 87.75MC 81. 75MC 71. 75MC 65. 75MC 59.75MC CHANNEL 13 12 11 10 9 8 7 6 5 4 3 2 CONNECT VTVM DC Probe to Point Common to chassis. ADJUST A505 A506 A507 A508 A509 A510 A511 A 512 A513 ASH A515 A516 REMARKS Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. D * .L < 25 So cj z PAGE 7 RadioFans.CN s m CO VOLTAGE AND RESISTANCE MEASUREMENTS VOLTAGE READINGS RESISTANCE READINGS Item V 1 V 2 V 3 V 4 V 5 V 6 V 7 V 8 V9 V 10 V 1 1 V 12 V 13 V 14 V 15 V 16 V 17 V18 V 19 V20 V21 V22 V23 V24 V25 Tube 6J6 6J6 616 6AG5 6AG5 6AG5 6AG5 6AL5 6SN7GT 6K6GT 6SN7GT 6BA6 6BA6 6AU6 6AL5 6AT6 6K6GT 6SN7GT 6AL5 6SN7GT 6BG6G 6X4 1B3GT 5U4G 10BP4 Pin I 70VDC 95VDC 50VDC -1VDC -.9VDC -1VDC ov. (J-1.5VDC OV. OV. OV. -.5VDC OV. -.4VDC OV. #-10VDC OV. .1VDC OV. 275VDC Pin 2 70VDC 95VDC 50VDC .4VDC .2VDC .3VDC 1.5VDC 85VDC 3VDC OV. OV. OV. -.1VDC OV. 6. 3VAC #55VDC 10VDC OV. 225VDC 6. 3VAC OV. Pin 3 6. 3VAC 6. 3VAC 6.3VAC 6.3VAC 6.3VAC 6. 3VAC 6.3VAC .2VDC 13VDC 6. 3 VAC 6. 3VAC 6.3VAC 6. 3 VAC 6.3VAC #290VDC #OV. 6.3VAC 9. 5VDC #12. 5 VDC OV. Pin 4 OV. OV. OV. OV. OV. OV. OV. -1.8VDC OV. OV. OV. OV. OV. OV. M10VDC #OV. OV. -.2VDC OV. OV. Pin 5 -.4VDC -1.6VDC -3.4V.DC 100 VDC 105VDC 95VDC 70VDC 110VDC 105VDC 100VDC 105 VDC 50VDC OV. -.4 VDC OV. (I320VDC 2VDC 130VDC #OV. OV. Pin 6 -. 4VDC -3.2VDC 5-3.7VDC IOOVDC 105VDC 110VDC 110VDC OV. 5. 2VDC 100VDC 105VDC 50 VDC OV. OV. #ov. 15.5VDC I8VDC OV. 9. 5 VDC #350VDC 275VDC Pin 7 OV. OV. .2VDC .4VDC .2VDC .3VDC 1.5VDC OV. OV. 1.6VDC 1. 5VDC OV. -. 4 VDC 80 VDC OV. 6. 3VAC 1. 2VDC 6. 3VAC OV. 280VDC Pin 8 6. 3 VAC 6. 3VAC *20VDC OV. OV. #280VDC Pin 9 TOPCAP * DO NOT MEASURE OV. OV. 300VDC 11VDC 117VAC PIN 10 225VDC 1 #400VAC 1 6.3VAC PIN 11 PIN 12 70VDC 6. 3 VAC #400VAC6. 3VAC300VDC TAKEN WITH VACUUM TUBE VOLTMETER. t MEASURED FROM PIN 3 OF V18. 6.3VAC MEASURED ACROSS FILAMENTS: * DO NOT MEASURE. NOTE: CONTRAST CONTROL SET AT MAXIMUM FOR THESE MEASUREMENTS. Item V 1 V 2 V 3 V A V 5 V 6 V7 V 8 V9 V 10 V 1 1 V 12 V 13 V 14 V 15 V 16 V17 via V 19 V20 V 2 1 V22 V 23 V24 V25 Tube 6J6 616 6J6 6AG5 6AG5 6AG5 6AG5 6AL5 6SN7GT 6K6GT 6SN7GT 6BA6 6BA6 6AU6 6AL5 6AT6 6K6GT 6SN7GT 6AL5 6SN7GT 6BG6G 6X4 1B3GT 5U4G 10BP4 Pin 1 f6Kn t3Kfi r?Kn ,5Kn 15KJJ 11KJJ .in IMeg. Of! on 470KT1 22Kn 200KSJ 15 Meg. Inf. #2 Meg. 27Kf! 5 Meg. Inf. tesn Inf. Inf. on Pin 2 f6Kn fsicn t7Kn 39n 39n 39n ison t4.5Kn teooKn on Of! on lOOKn on .in 12.4 Meg tl.2 Meg. 27Kfi t!2KS2 .in Inf. Inf. 8Kfl 1. IMeg. Pin 3 .in .in .in .in .in .in .in #100 n 150KO .in .in .in .in .in t2Kn ton .in 2Kn #82n Inf. Inf. #on PIN 10 t23on Pin 4 on on Of! on on on on IMeg. IMeg. on on on on on tl. 5KB #2. 2 Meg. on ISOKf! Inf. Inf. Inf. #2en PIN 1 27Kn Pin 5 85Kn IMeg. lOOKf! f2. 5KU t2.4Kn tSKf! t7. 6Kn t3. 3Kn t9Kn t2. 5Kn t2.5Kn t8Kf! on lOOKf! #470Kfl t2Kn 4. 8 Men. t270Kf! I Meg. Inf. Inf. on PIN 12 .If! Pin 6 85KH IMeg. lOOKn T2.5Kn t2.4Kf! t2. 2Kn t2. 2Kn on 4Kn t2.5Kf! t4. 8Kn t8Kn on Inf. #on #5.5Kn #56on Inf. 2Kn t230f! tesn Inf. Pin 7 on on 47n 39n 39f! 39fi ison on on loon loon on lOOKn t220Kn on .in 4.8Mee. .in on t6Kn Inf. #28n on Pin 8 .in .If! #47on on Of! t4.7Kn Inf. 8Kf! Pin 9 TOP CAP texn FOP CAP f6Kn t MEASURED FROM PIN 8 OF V24. # MEASURED FROM PIN 3 OF V18. r 1. DC Voltage measurements ore at 20,000 ohms per volt; AC Voltage measured at 1,000 2. Pin numbers are counted in a clockwise direc- tion on bottom of socket. 3. Measured values are from socket pin to com- mon negative unless otherwise stated, Line voltage maintained at 117 volts for volt- age readings. Front panels controls set at minimum. Where readings may vary according to the setting of the service controls, both minimum and maximum readings are given. RadioFans.CN RF TUNER-RIGHT SIDE RF TUNER-LEFT SIDE PAGE 1O RadioFans.CN nrftCTt* lL*J?f /, 4tf$ 4f f. Tff jk*_ * *i * PAGE 22 RadioFans.CN o O m CHASSIS BOTTOM VIEW-CAPACITOR IDENTIFICATION -i laaow NOISIA3131 S -n RadioFans.CN PAGE 12 RadioFans.CN o O m CHASSIS BOTTOM VIEW-RESISTOR IDENTIFICATION C&8OL-1 13QOW NOISIA3131 *S *R RadioFans.CN V9A V24 V 9 V 8 CHASSIS-TOP VIEW HIGH VOLTAGE SUPPLY PAGE 13 RadioFans.CN A PHOTOFACT STANDARD NOTATION SCHEMATIC Howard W. Sams & Co., Inc. 1949 RF TUNER PARTS LIST AND DESCRIPTIONS TUBESRESISTORS ITEM No. V501 V502 USE RF Amp. Mlxer-Oso. REPLACEMENT DATA STANDARD REPLACEMENT 6AG5 6J6 RMA BASE TYPE 7BD 7BF ITEM No. R501 R502 R503 R504 R505 R506 R507 R508 RATING RESISTANCE 39002 47K2 lOKffi 2200S 4700S2 220KS2 10K2 4700S2 WATTS 4 4 i i - - IDENTIFICATION RF Grid Shunt RF Grid RF Plate Shunt RF Decoupling Mixer Grid Mixer Grid Osc. Grid Osc. Plate CAPACITORS COILS ITEM No. C501 C502 C503 C504 C505 0506 C507 C508 C509 C510 Coll C512 RATING CAP. 5 .5-3 1000 120 .5-3 100 .5-3 10 20 .5-3 1000 1000 VOLT IDENTIFICATION Fixed Trimmer RF Trimmer Filament Bypass RF Decoupling RF Trimmer RF Coupling RF Trimmer Osc. Feedback Osc. Grid Cap. Osc. Trimmer Filament Bypass RF Bypass ITEM L501 L502 L503 L504 L505 L506 Ant. Coll Mixer & Osc Fil. Choke Fll. Choke IF Trans. RF Coil DC RES. PRI. 08 08 OS OS OS .252 SEC. os OS . 2 8 Replace in matched pairs only. Each coll is Identified with channel number. PAGE 14 RadioFans.CN U. S. TELEVISION MODEL T-1O823 RadioFans.CN PARTS LIST Al TUBES (SYLVANIA or Equivalent)CAPAC ITEM No. VIA B C V2A B C V3A B V4 V5 V6 V7 V8 V9A B V10 Vll V12 V13 V14 V15 V16 V17 V18 V19 V20 V21 V22 V23 V24 V25 USE RF Amplifier RF Amplifier RF Amplifier Mixer Mixer Converter Oscillator Oscilllaor 1st Video IF Amp. 2nd Video IF Amp. 3rd Video IF Amp. 4th Video IF Amp. Video Detector Video Amplifier Video Amplifier Video Output DC Rest. -Sync Sep. & Phase Invert. 1st Sound IF Amp. 2nd Sound IF Amp. Limiter Discriminator AF Amplifier Audio Output Vert.Osc. & Amp. Horiz. Phase Det. Horiz. Multivibrato Horiz. Output Damper HV Rectifier LV Rectifier Picture Tube REPLACEMENT DATA UST PART No. PA-10-6J6 PA-10-6J6 PA-10-6AG5 PA-10-6J6 PA-10-6AK5 PA-10-6J6 PA-10-6J6 PA-IO-6J6 PA-10-6AG5 PA-10-6AG5 PA-10-6AG5 PA-10-6AG5 PA-10-6AL5 PA-10-6SN7 PA-10-6AU6 PA-10-6K6 PA-10-6SN7 PA-10-6BA6 PA-10-6BA6 PA-10-6AU6 PA-10-6AL5 PA-10-6AT6 PA-10-6K6 PA-10-6SN7 PA-10-6AL5 PA-10-6SN7 PA-10-6BG6 PA-10-6X4 PA-10-8016 PA-10-5U4 PA-10-10BP4 STANDARD REPLACEMENT 6.T6 6J6 6AG5 6J6 6AK5 6J6 6J6 6J6 6AG5 6AG5 6AG5 6AG5 6AL5 6SN7 6AU6 6K6GT 6SN7GT 6BA6 6BA6 6AU6 6AL5 6AT6 6K6GT 6SN7GT 6AL5 6SN7GT 6BG6G 6X4 1B3GT 5U4G 10BP4 RMA BASE TYPE 7BF 7BF 7BD 7BF 7BD 7BF 7BF 7BF 7BD 7BD 7BD 7BD 6BT 8BD 7BK 7S 8BD 7BK 7BK 7BK 6BT 7BT 7S 8BD 6BT 8BD 5BT 5BS 3C 5T 12D NOTES Some models use a crystal detector. Some models use V9A in lieu of V9B and V10. CAPACITORS Capacity values given in the rating column are in mfd. for Electrolytic and Paper Capacitors, and in mmfd. for Mica and Ceramic Capacitors. ITEM No. CIA B C C2A B C C3A B C4A B C C5A B C C6 C7