RCA-730TV-Sams-70-7电路原理图.pdf

PBOTOFACT* Folder RCA VICTOR MODELS 73OTV1, 73OTV2, (Ch. KCS27-1) VERT. HORIZ. HOLD BRIGHTNESS CONTRAST CONT, CHANNEL SELECTOR FINE TUNING VOL CONT TONE SW. ON-OFF SW. RCA VICTOR MODEL 750TV1 RADIO TUNING TRADE NAME RCA Victor, Models 730TV1, 730TV2 (Ch. KCS 27-1) MANUFACTURER RCA Victor Dlv., Radio Corp. of America, Camden, New Jersey TYPE SET AM-FM-Phono-TV Receiver TUBES Thirty POWER SUPPLY 115 Volts-60 Cycles AC TUNING RANGE TV Channels 1 thru 13 (44-88MC, 174-216MC) AM 540-1600KC FM 88-108MC RATING: TV 2 . 4 4 Amp. Radio .6 Amp. 117 Volts AC D 117 Volts AC Alignment Instructions Block Diagram Disassembly Instructlonsl Horlz. Osc. - *7 CHASSIS BOTTOM VIEW-TRANS., INDUCTO PAGE 4 RadioFans.CN CTOR AND ALIGNMENT IDENTIFICATION PAGE 9 RadioFans.CN s / O; XCT BAGS 3Rt3 VIDCOIF BOTTOM VIEW o HO R. OUT PUT TOP VIEW O m Cn TUBE PLACEMENT CHART LAIOCZ siaaow RadioFans.CN TV ALIGNMENT INSTRUCTIONS ALIGNMENT INSTRUCTIONS-READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT If receiver Is to be aligned with picture tube removed, it Is recommended to also remove the 6SN7GT (V15) hori- zontal oscillator tube to eliminate high voltage shock hazard. When complete alignment Is to be performed, It can most conveniently be done In the order outlined; SOUND IF ALIGNMENT USING DUMMY ANTENNA .05MFD .05MFD .05MFD SIGNAL GENERATOR COUPLING High side to pin 1 (Grid) of 6AU6 (V10) Low side to chassis, n High side to pin 1 (Grid) of 6BA6 (V9). Low side to chassis. SIGNAL GENERATOR FREQUENCY 21.25MC (Uranod.) CHANNEL 13 n n AM SIGNAL GENERATOR AND VTVM CONNECT VTVM DC Probe thru 1 Meg to Polnt Common to chassis. DC Probe thru 1 Meg to Point<E Common to chassis, DC Probe thru.J. Meg to Point Common to chassis. ADJUST A1.A2 Al A3,A4 SOUND IF ALIGNMENT USING FM SIGNAL GENERATOR Connect the synchronized sweep voltage from the signal for horizontal deflection. DUMMY ANTENNA .05MFD .05MFD SWEEP GENERATOR COUPLING High side to pin 1 (Grid) of 6BA6 (V9). Low side to chass Is . n SWEEP GENERATOR FREQUENCY 21.25MC (IMC Sweep ) n MARKER GENERATOR FREQUENCY 21.25MC n CHANNEL 13 it REMARKS Detune Al. Adjust A2 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. AND OSCILLOSCOPE generator to the horizontal Input of the oscilloscope CONNECT SCOPE Vert. Amp. to Polnta Low side to chassis. Vert. Ami. to Polntp Low side to chassis. ADJUST A3,A4 A1.A2 VIDEO IF ALIGNMENT REMARKS If 60% sweep rate Is used shunt R50 with 5600S. Adjust A3 and A4 for maximum amplitude and symmetry as per Fig 1. Adjust A2 for maximum amplitude and stralghtness of diagonal line as per Fig 2. Adjust Al so 21.25M2 marker is at center of diagonal line. Continue with step 4. Before starting video IF alignment connect VTVM between Junction of R25 and R26 and chassis. Adjust contrast control to give VTVM reading of -3V. Leave contrast control at this setting for entire video IF alignment. Remove 6J6 local oscillator tube V3 to prevent erroneous Indications. DUMMY ANTENNA SIGNAL GENERATOR COUPLING High side to un- grounded tube shield floating over mixer tube (V2). Low side to chassis. n it n n SIGNAL GENERATOR FREQUENCY 21.25MC 27.25MC 22. SMC 23.9MC 26.0MC 24. SMC CHANNEL 13 n It CONNECT VTVM DC Probe to Point GJ Common to Chassis. it n ADJUST A5,A6 A7 AS A9 AID All REMARKS Adjust for minimum deflection. Adjust for minimum delfectlon. (Some models may not have this trap.) Adjustfor maximum deflection. n n II n n it II n nn n OVERALL VIDEO IF RESPONSE CHECK Connect the synchronized sweep voltage from the signal generator to the horizontal Input of the oscilloscope for horizontal deflection. DUMMY ANTENNA SWEEP GENERATOR COUPLING High side to un- grounded tube shield floating over mixer tube (V2). Low side to chassis . SWEEP GENERATOR FREQUENCY 24MC (10MC Sweep) MARKER GENERATOR FREQUENCY 21.25MC 23. CMC 25.0MC 25.75MC 27.25MC CHANNEL 13 CONNECT SCOPE Vert . Amp . to Point Low side to chassis. ADJUSTREMARKS Check response curve obtained on scope. If necessary., slightly re- touch A5 thru All for proper wave shape and placement of markers as per Fig 3. 1. 2. 3. 1. 2. 4. 5. 6. 7. 10. RF AMP. 8. MIXER ALIGNMENT i Before starting RF alignment connect VTVM to junction of R25 and R26 and chassis and adjust contrast control to give VTVM reading of -IV. Leave contrast control at this setting for entire RF alignment. Connect a 1000MMFD capacitor from pin 1 of 6AG5 1st Video IF Amp (V4) to chassis. DUMMY ANTENNA Two 120S carbon res. n SWEEP GENERATOR COUPLING Across antenna ter- minals with 1202 resistor In each generator lead. SWEEP GENERATOR FREQUENCY 177MC (ion; Sweep) 183M3 (10MC Sweep) 189M3 (10MC Sweep) 195MC (10MC Sweep) 201MC (10MC Sweep) 207fC (10MC Sweep) 213MC (10MC Sweep) MARKER GENERATOR FREQUENCY 175.25MC 179.75MC 181.25M3 185.75MC 187.25MC 191.75MC 193.25MC 197.75M3 199.25MC 203.7SMC 205.25MC 209.75MC 211.25MC 215.75MC CHANNEL 8 9 10 11 12 13 CONNECT SCOPE Vert . Amp . thru 10KS2 to Point <!fft Low side to chassis . n ADJUST A13,A13 A14,A15 REMARKS Adjust for approximately flat top- ped response curve as per Fig 4. Markers must be above 705S. Keep slug pairs in same relative posi- tions. Check to see that response is as above. Slight readjustment of A12, A13,A14,A15 may be necessary to obtain optimum response for all high band channels. 12. PAGE 6 RadioFans.CN TV ALIGNMENT INSTRUCTIONS CCONTJ 13. 14, 15. 16. 17. 18. DUMMY ANTENNA SWEEP GENERATOR COUPLING SWEEP GENERATOR FREQUENCY 85MC (10MC Sweep) 79MC (10MC Sweep) 69MC (10MC Sweep) 63MC (10MC Sweep) 57MC (10MC Sweep) MARKER GENERATOR FREQUENCY 83.25MC 87.75MC 77.25MC 81.75MC 67.25MC 71.75MC 31.25MC 65.75MC 55.25MC 59.75MC CHANNEL 6 5 4 3 2 CONNECT SCOPE ADJUST A16,A17 A18,A1 REMARKS Adjust for approximately flat topped response curve as per Fig 4. Markers must be above 70%. Keep slug pairs In approximately same relative position. Check to see that response Is as above. Slight readjustment of A16, A17,A18,A19 may be necessary to obtain optimum performance on all low band channels. OSCILLATOR ALIGNMENT Replace oscillator tube (V3). Set fine tuning control to the raid-point of Its tuning range. The sound IF system must be accurately aligned before starting the oscillator alignment. DUMMY ANTENNA Two 120S carbon res . ti n SIGNAL GENERATOR COUPLING Across antenna ter- minals with 120S resistor In each lead. n n SIGNAL GENERATOR FREQUENCY 215.75MC 209.75MC 203. 75MC 197.75MC 191.75MO 185.75MC 179.75MC 87.75MC 81.75MC 71.75MC 65.75MC 59.75MO CHANNEL 13 12 11 10 9 8 7 6 5 4 3 2 CONNECT VTVM DC Probe thru 1 Meg to Point Common to chassis. ADJUST A20,A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 ASS REMARKS Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. Keep slug pairs In 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 In same relative position. Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. WAVE TRAP ADJUSTMENT Wave traps A34 and ASS are used for specific types of Interference and their alignment will depend upon the type encountered. With the receiver t uned to the channel having the Interference set fine tuning control until Interference Is at maximum. Adjust A34 and A35 for minimum Interference In the picture and sound. Keeping the cores at approxim- ately the same relative position. Turn one core 1/2 turn, adjust the other for minimum Interference. o o m BSQ 3*38 to FIG. I FIG. 2 FIG.3 FIG. 4 PAGE? RadioFans.CN RADIO ALIGNMENT INSTRUCTIONS 19 20 21 19 20 22 23 24 25 26 ALIGNMENT INSTRUCTIONS READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT When complete receiver alignment Is to be performed align the FM IF Amp. before aligning AM IF Amps. To set pointer turn tuning cap fully closed and set pointer to last reference mark at low frequency end of dial. Volume control should be at maximum position. Output of signal generator should be no higher than necessary to obtain an output reading. Use an Insulated alignment screwdriver for adjusting. FM IF ALIGNMENT USING AM SIGNAL GENERATOR AND VTVM Connect two matched 100K2 (t 1%) resistors In series from Polntdjto chassis. The Junction of these two resistors Is alignment Pointas shown on the schematic. DUMMY ANTENNA .01MFD .Q1MFD .01MFD SIGNAL GENERATOR COUPLING High side to pin 1 (Grid) Of 6AU6 (V23). Low side to chassis. Across antenna ter- minals. SIGNAL GENERATOR FREQUENCY 10.7MC (Unmod. ) 10.7M3 BAND SWITCH POS. FM (Ext. clock- wise.) RADIO DIAL SETTING Tuning gang fully closed ii CONNECT VTVM DO Probe to Polnt Com- mon to Point f DC Probe to Point Com- mon to chas- sis. ADJUST A36 A37 A38, A39, A40, A41 REMARKS Adjust for maximum deflection. Adjust for zero reading. A posi- tive and negative reading will be obtained on either side of the correct setting. Repeat steps 19 and 20 If A37 required much ad- justment. Adjust for maximum deflection. Alternately load the primary and secondary windings of the IF transformers with 680ffl while the opposite side of the same trans- former is being adjusted. Use frequency modulated signal with 60, modulation and 450KO sweep. Use 120% sawtooth voltage In scope for horizontal deflection. DUMMY ANTENNA .01MFD .01MFD DUMMY ANTENNA Two 1202 carbon res. SIGNAL GENERATOR COUPLING Across antenna ter- minals . SIGNAL GENERATOR COUPLING Across antenna ter- minals with 120S resistor in each lead. SIGNAL GENERATOR FREQUENCY 10.7MC (450KC Sweep ) SIGNAL GENERATOR FREQUENCY 106MC 90MC BAND SWITCH POS. FM BAND SWITCH POS. FM RADIO DIAL SETTING Tuning gang fully closed ;M RF ALIGNMEU RADIO DIAL SETTING 106MC (5 3/4 to right of left hand calibration mark at low freq. end of dial back plate). 9 CMC (1 1/8 to right of the reference point listed above) . CONNECT SCOPE Vert. Amp. to Point/. Low side to chas- sis. Vert. AmP- to Pointp Low side to chas- sis. CONNECT VTVM DC Probe to Point pi Com- mon to chas- sis . ADJUST A36, ASS, A39, A40, A41 A37 ADJUST A42, A43 A44, A45 REMARKS Disconnect stabilizer C7. Adjust for maximum amplitude and symmetry as per Fig 5. Reconnect stabilizer cap C7. Adjust A37 so crossover point occurs at center of pattern as per Fig 6. Slightly retouch A36 for maximum amplitude and stralghtness of crossover lines. Continue with step 22. REMARKS Adjust for maximum deflection. ii FM IF alignment must be complete before starting AM alignment. Volume control should be at majcimum position. Output of signal generator should be no higher than necessary to obtain an output reading. Use an insulated alignment screwdriver for adjusting. DUMMY ANTENNA .01MFD 200MMFD 200MMFD SIGNAL GENERATOR COUPLING High side to pin 7 (Grid) of 6BE6 (V21). Low side to chassis. High side to terminal 2 of antenna terminal strip. Low side to chassis. SIGNAL GENERATOR FREQUENCY 4S5KC (40CA, Mod.) 1400KC 600KC BAND SWITCH POS. AM (3 pos- itions clock- wise) RADIO DIAL SETTING Tuning gang fully closed 1400KC (5 15/16 to the right of left hand calibration mark at low freq. end of dial back plate). 600KO (1 1/4 to the right of the reference point listed above. OUTPUT METER Across voice coil ADJUST A46, A47, A48, A49 A50, A51 A52, ASS REMARKS Adjust for maximum output. Alter- nately load the primary and secon- dary windings of the AM IF trans- formers with 47KS2 while the oppo- site side of the same transformer is being aligned. Adjust for maximum output. Adjust for maximum output. Repeat steps 24 and 25. FIG.5FIG. 6 PAGE 8 RadioFans.CN RF TUNER-RIGHT SIDE RF TUNER-LEFT SIDE PAGE 10 RadioFans.CN CHASSIS BOTTOM VIEW-CAI PAGE 18 RadioFans.CN APACITOR IDENTIFICATION PAGE I RadioFans.CN Zl Id-MBA IAIO11O8 SISSVHO RadioFans.CN RESISTOR IDENTIFICATION PAGE 17 RadioFans.CN PARTS LIST AND DESCRIPTIONS TUBES (SYLVANIA or Equivalent) ITEM No. VI V2 V3 V4 V5 V6 V7 V8 V9 V10 VI 1 V12 VIS V14 V15 V16 V17 V18 V19 V20 V21 V22 V23 V24 V25 V26 V27 V28 .V29 V30 USE RF Amp. Mixer Oscillator 1st Video IF Amp 2nd Video IF Amp Srd Video IF Amp Video Det.- Clamper Video Amp. 1st Sound IF Amp . Limlter Discriminator Bias Clamper Sync. Amp. -Sync. Sep. Vert. Os c. and Dlsch.-Vert. Output Hor. Osc.-AFO Hor. Output Damper HV Rectifier LV Rectifier FM Conv. AM Conv. 1st IF Amp. 2nd IF Amp. Ratio Det. Det.-AVC-Phase Inv. AF Amp. Power Output Power Output Rectifier Picture Tube REPLACEMENT DATA RCA PART No. 6J6 6J6 6J6 6AGS 6AQ5 6AG5 6AL5 12AU7 6BA6 6AU6 6ALb 6AT6 6SN7GT 6SN7GT 6SN7GT 6BG6G 5V4G 1B3GT 5U4G 6BE6 6BE6 6BA6 6AU6 6AL5 6SQ7 6SQ7 6K6GT 6K6GT 5Y3GT 10BP4 STANDARD REPLACEMENT 6J6 6J6 6J6 6AG5 6AG5 6AG5 6AL5 12AU7 6BA6 6AU6 6AL5 6AT6 6SN7GT 6SN7GT 6SN7GT 6BG6G 5V4G 1B3GT 5U4G 6BE6 6BE6 6BA6 6AU6 6AL5 6SQ7 6SQ7 6K6GT 6K6GT 5Y3GT 10BP4 RMA BASE TYPE 7BF 7BF 7BF 7BD 7BD 7BD 6BT 9A 7BK 7BK 6BT 7BT BED 8BD 8BD 5BT 5L 3C 5T 7CH 7CH 7BK 7BK 6BT 8Q 80, 7S 7S 5T NOTES CAPACITORS Capacity values given in the rating column are in mfd. for Electrolytic and Paper Capacitors, and in mmfd. for Mica and Ceramic Capacitors. TEM No. CIA B C2A B C 03A B C4A B C5A B C C6A B C 07 C8 09 CIO Oil 012 CIS C14 015 016 017 C18 019 C20 C21 022 C23 024 C25 026 C27 028 C29 030 031 C32 CSS 034 035 C36 C37 CSS 039 C40 C41 C42 043 044 C45 046 047 C48 C49 S50 051 C52 RATING CAP. 40 10 40 40 130 80 10 250 1000 30 10 30 30 30 40 5 10 10 270 270 1.5 1.5 1500 1500 2.2 4.7 . 6 8 1500 22 1500 62 1500 10 4.7 4.7 270 .25 1500 1500 270 1500 1500 56 270 75 100 1500 270 10 . 0 5 . 0 5 .25 1500 1500 .01 1500 1500 270 .05 100. 390 VOLT 450 350 450 150 50 450 450 10 6 350 400 250 450 350 25 50 500 200 1000 1000 1000 500 400 400 200 400 1000 400 500 1000 REPLACEMENT DATA RCA PART No. 71782 71781 71780 71436 72736 72052 72121 71540 71540 71500 71500 71501 71501 7150S 71520 71504 71501 33101 71501 71501 45466 71520 71520 65401 70618 71501 71501 73091 71501 71501 73091 45469 71501 73091 72615 70615 70615 70618 71501 71501 70610 71501 71501 73091 70615 39628 73094 AEROVOX PART No. AF82J2HI AF88J26B AF164J AF50R200S AF862J4A* AF66J4A PRS150/4 1468-00025 P488-25 1467-0015 1467-0015 1468-00025 1467-0015 1467-0015 1468-00025 1469-000075 1468-0001 1467-0015 1468-00025 1468-00001 P488-05 P488-05 P488-25 1467-0015 1467-0015 P488-01 1467-0015 1467-0015 1468-00025 P488-05 1468-0001 1468-0004 CORNELL- DUBILIER PART No. UP7BJ 920 UP9CJ 887 UP9BJ 857 UP7BJ 808 UP8CJ 898 UP2245 CO BBR5- 50T 5W5T25 GT2P25 1W5D15 1W5D15 5W5T25 1W5D15 1W5D15 5W5T25 5W5T1 1W5D15 5W5T25 5W5Q1 GT4S5 GT4S5 GT2P25 1W5D15 1W5D15 GT4S1 1W5D15 1W5D15 5W5T25 GT4S5 5W5T1 5W5T4 ERIE PART No. r I NPOK-10 NPOK-10 GP2K-250 GP2K-250 NPOK-1.5 NPOK-1.5 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-0015 GP1K-10 GP2K-250 GP2L-0015 GP2L-0015 GP2K-250 GP2L-0015 GP2L-0015 GP2K-250 NPOM-75 GP1K-100 GP2L-0015 GP2K-250 GP1K-10 GP2L-0015 GP