Raytheon-7DX21-7DX22P-18DX21A-Sams-81-13电路原理图.pdf

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1、PHOTO FACT* Folder RAYTHEON MODELS 7DX21, 7DX22P, 18DX21A VOLUME CONTROL OFF-ON-SW. VERT. HOLD HORIZ.HOLD CONTRAST CHANNEL SELECTOR RAYTHEON MODEL 7DX22P TRADE NAME Raytheon, Models 7DX21, 7DX22P, and 18DX21A MANUFACTURER Belmont Radio Corporation, 5921 W. Dickens Ave., Chicago 39, 111. TYPE SET Tel

2、evision Receiver TUBES Eighteen POWER SUPPLY 105-125 Volts AC or- DC TUNING RANGEChannels 2 thru 13 RATING: .97 Amp. 117 Volts AC Alignment Instructions Block Diagram Par-ts List and Description Photographs Cabinet-Rear View Capacitor Identification Chassis-Top View INDEX 6,7 Photographs (continued)

3、 13 14,15,16 7 11,18 High Voltage Supply RF Tuner Resistor Identification Trans., Inductor ,y V*: : f- CHASSIS BOTTOM VIEW-TRANS.,INDUC1 PAGE 4 RadioFans.CN JCTOR AND ALIGNMENT IDENTIFICATION PAGE 9 RadioFans.CN V8 I9T8 RATIO DET. A.F. AMR VIDEO OUTPUT SYNC. D.C. R SER RESTORER R.E AMP. /vT 6BH I CO

4、NVERTER 3RD.I.F.AMR 2ND.I.FAMR 1ST. I.F AMR /-X V4 V3 / I 1 I 1 1 1 1 r L2 /vTN U2AU6 1 CONVERTER R.F AMR ,- -x LIMITER ( 6BH6 ) f 1ST. I.FAMR 2ND. I.FAMR 3RD. I.F AMR /4) (eBA6 ) Ll /JlS (25L6GTj AUDIO OUTPUT VERT. MULTI. (, - l VERT. OUTPUT LSN7GTj PICTURE TUBE 7 - C r BOTTOM VIEW J 0 RATIO DET. A

5、.F. AMR VIDEO OUTPUT /vTT. SEP / 6 D.C. RESTORER l|2AU6 ) VIDEO DET 9 I SALS ) X fz) 2SN7GT) _S -. / HOR. MULTI. /HSy HOR. OUTPUT I 1 VIS ! JP* I L 1 j H.V. OSC. VIS V-v SOL6GT /- 1 VI7 IB3GT TUBE PLACEMENT CHART dZZXQ/. IZXQZ. S13QOW NO3HiAVa RadioFans.CN ALIGNMENT INSTRUCTIONS Alignment of this re

6、ceiver may be performed without removal of the picture tube or disabling the high voltage supply. When the receiver Is placed on its side, care must be exercised not to damage the picture tube or to come In contact with the high voltage leads. Alignment point A, where the IF signal is injected is ac

7、cessible thru the large hole In the tuner shield on the .mriRrRlde of the tuner. DUMMY ANTENNA 47MMF 47MMF 47MMF 47MMF SIGNAL GENERATOR COUPLING High side thru 47MMF to Point A. Low side to chassis, - SIGNAL GENERATOR FREQUENCY 23.0MO 24.0MC 26.4M3 25.45MO CHANNEL 9 CONNECT VTVM Across contrast cont

8、rol (R4) ADJUST Al A2 A3 A4 Connect the synchronized sweep voltage from the signal generator to the horizontal deflection. DUMMY ANTENNA 47MMF SWEEP GENERATOR COUPLING High side to Point A. Low side to chassis. SWEEP GENERATOR FREQUENCY 24MC (10MC Sweep ) MARKER GENERATOR FREQUENCY 26.75MC 22.25MC C

9、HANNEL 9 CONNECT SCOPE Across contrast control (R4) with 10KS2 in series with Vert. Amp. lead. Shunt vertical input terminals with .001MFD capacitor. REMARKS Adjust for maximum deflection. horizontal input of the oscilloscope for ADJUST REMARKS A2, A3, A4 for proper response curve and placement of m

10、arkers as per Fig 1. 5. SOUND IF ALIGNMENT Short the antenna leads during alignment of the ratio detector circuit so extraneous noise pulses will not give erratic indications on the oscilloscope. DUMMY ANTENNA .01MFD .01MFD SWEEP GENERATOR COUPLING Across contrast control (Control fully on) SWEEP GE

11、NERATOR FREQUENCY 4. SMC (IMC Sweep) MARKER GENERATOR FREQUENCY 4. SMC CHANNEL 9 CONNECT SCOPE Vert. Amp. to Point Low side to B-. Vert. imp. to Point Low side to B-. ADJUST A5.A6 A7,A8 REMARKS Disconnect stabilizer cap (C4) . Ad- Just for maximum amplitude and symmetry as per Fig 2. Reconnect stabi

12、lizer cap. Adjust A7 so 4. SMC marker is at center of pattern as per Fig 3. Adjust AB for maximum amplitude and straight- ness of diagonal line. TUNER ALIGNMENT Pre-set the tuner cores and trimmers as indicated in figures 4 and 5 before attempting alignment of the tuner If Fig. 5, the dimensions giv

13、en are the distance from the screw head shoulder to chassis. When making the adjustments of the station selector screws do not force the screw at any time. The in position is reached when the black shuttle bar holding the core slugs reaches the top limit of its travel. It Is possible to force the sc

14、rew In farther than this point but this results In Jamming the tuner. DUMMY ANTENNA Two 125f carbon res. SWEEP GENERATOR COUPLING Across antenna ter- minals with 125S2 resistor in each generator lead. SWEEP GENERATOR FREQUENCY Approx. 85MC (10MC Sweep) Approx. 79MC (10MC Sweep) Approx. 69M3 (10MC Sw

15、eep) Approx. 63MC (IONS Sweep) Approx . 57MC (10MC Sweep) MARKER GENERATOR FREQUENCY Off 83.25MC 77.25MC 67.35MC 61 .25MC 55.25MC CHANNEL 6 A 5 4 3 2 CONNECT SCOPE Across contrast control (R4) with 10KS2 in Vert. Amp. lead. Shunt vert, in- put terminals with .001MMF capacitor. ADJUST A9,A10 All REMA

16、RKS Turn channel 6 station selector screw 1 full turn from its maximum in position. Adjust A9 and AID for maximum amplitude and symmetry as per Fig 6. Adjust All so marker is 50% down on the low frequency slope on curve. If necessary, repeat step 8. Check the response on all low band channels. It ma

17、y be necessary to forfeit some of the response on one channel to Improve that of another by slight retouching of A9 and A10. If It Is possible to move video marker to 50% point on the curve by the station-selector screw (with screw at least 2 turns from its maximum out position) the low band is prop

18、erly aligned. 11. FIG.FIG.2 FIG. 3 PAGE 6 RadioFans.CN DUMMY ANTENNA 15. SWEEP GENERATOR COUPLING TO ADJUST TUNING SLUGS_ I - Push arm indicated la the righl hold (irmly against STOP while making adjustment. SWEEP GENERATOR FREQUENCY Approx. 213MC (10MC Sweep) Approx. 207MC (10MC Sweep) Approx. 201M

19、C (10MC Sweep) Approx. 195MC (10MC Sweep) Approx. 189MC (10MC Sweep) Approx. 183MC (10MC Sweep) Approx. 177M3 (10MC Sweep) MARKER GENERATOR FREQUENCY Off 211.25MC 205.25MC 193.25MC 187.25MC 181.25MC 17S.25MC 13 12 CONNEa SCOPE A12, A13 Turn channel 13 station selector screw 3/4 turn from it maximum

20、in position. Adjust A12 and A13 for maximum amplitude and symmetry as per Fig Adjust A14 so marker is 5O% down on the low frequency slope on curve If necessary, repeat step 12. Check response on all high band channels. If necessary, retouch A12 and A13 for compromise to give best overall response cu

21、rve. If it is possible to move video carrier marker to 5056 point on response curve by adjustment of channel 7 station-selector screw (screw at least one full turn in from its maximum out position), the high band is properly aligned. Dimension X is measured from the end of the slug to Ine end of the

22、 coil form (which is not .always flush with the bokelite support ) FIG. 4 (The ends of the tuning slugs ore pointed as indicated ) X Dimension for White 1 . Blue - li Red - 1- 6BH6 HIGH- -0- 6J6 LOW LOW HIGH HIGH LOW- V0-| TOP VIEW OF TUNER CHASSIS FIG.5 r* 25 32 FIG.6 o O m (A N 0 X to m X O 00 O X

23、 to 153 BRIGHTNESS VERT. SIZE HORIZ.SIZE FOCUS HORIZ. CENT. VERT. CENT. CONT. CONT. CONT. CONT. CONT. CONT. CABINET-REAR VIEW PAGE? RadioFans.CN I m CP VOLTAGE AND RESISTANCE MEASUREMENTS VOLTAGE READINGS ltm V 1 V 2 V3 V 4 V 5 V 6 V7 V 8 V9 V10 V 1 1 V12 V13 V 14 V 15 V16 V 17 tub* 6BH6 6J6 6BA6 6B

24、A6 6BA6 6AL5 12AU6 12AU6 19T8 25L6GT 12AU6 12SN7GT 12SN7GT 12SN7GT 50L6GT 50L6GT 1B30T PTNS V187JP4 Pin 1 -.1VDC 125VDC -.1VDC -.1VDC ov ov ov -.4VDC -.4VDC OV OV OV OV -1VDO OV OV Pin 2 .4VDC 85VDC 1.1VDC 1.1VDC 1.7VDC OV OV OV -.6VDC 90VAO 4.5VDC 80VDO 295VDC 30VDC 65VDC 60VAC 60VAC Pin 3 85VAC 95

25、VAC 65VAO 58VAC 50VAC 12VAC S5VAC 35VAC -.4VDC 93VDC 4SVAC 2.5VDC 16VDC 4.2VDO 125VDC 130VDC Pin 4 90VAC 90VAC 58VAC 50VAC 45VAO 6VAO 45VAC 24VAC 24VAC 100VDC 55VAC 2.5VDC OV OV 125VDC 100VDC Pin 5 100VDC VD6b 115VDC 115VDC 115VDC 4.2VDC 40VDC 115VDO 6VAC OV 87VDC 31VDC 265VDO 105VDO -9.2VDC -13.5 V

26、DC Pin 6 125VDC OV 115VDC 115VDC 115VDC OV 125VDC 115VDC -.6VDC OV 125VDC 2.5VDC 16VDC 4.2VDC OV OV Pin 7 OV 2VDC 1.1VDO 1.1VDC 1.7VDC -4VDC OV OV OV 65VAC 4.5VDC 36VAC 45VAC 24VAO 110VAC 6VAC PinS -.4VDC 8VDC 24VAO 36VAC 12VAC 1VDC OV Pin 9 43VDC DO NOT MEASURE 1 6VAO 2 120V.DC 3 4.5VDC 456 OV OV 7

27、 89 10 1114 OV * Do Not Measure. TAKEN WITH VACUUM TUBE VOLTMETER RESISTANCE READINGS Item V 1 V 2 V 3 V 4 V 5 V 6 V7 V 8 V9 V 10 V I 1 V 1 2 V13 V 14 V15 via V 17 Tub. 6BH6 6J6 6BA6 6BA6 6BA6 6AL5 12AUS 12AUS 19T8 25L6GT 12AU6 12SN7GT 12SN7GT 12SN7GT 50L6GT 50L6GT 1B3GT Pin 1 900K2 T 10002 1 Meg. 8

28、50K2 3Si 1.52 72 470K2 Inf. Inf. 1 Meg. 10KS2 10 Meg. 100KS Inf. Inf. Inf. Pin 2 ess T5.5K2 5.6K2 5.6K2 5.6K2 lOOKffi 1.52 OS 33K2 372 22K2 T18K2 25.6 Meg. T300K2 T50K2 402 402 Inf. PINS 123 V18 1 7JP4 1.52 T180K2 22KS2 Pin 3 422 392 332 302 272 4.52 282 282 Inf. T8002 36B 10002 68K2 1.2K2 T1002 T15

29、02 Inf. Pin 4 382 382 312 282 242 1.52 362 192 192 T6202 44B 350K2 10 Meg. 18K2 tiooa T2.7K2 Inf. PinS T5.5KS lOKffi t 10002 T10002 T 10002 3.3K2 T8.2K2 T10008 1.52 470K2 T220K2 17 Meg. 35 -6 Meg. T8.2K2 2.2 Meg 15K2 Inf. Pin 6 T 10002 10K2 T 10002 t 10002 T10002 Inf. T632 t 10002 33KS2 02 t632 1000

30、2 68K2 1.2K2 02 Inf. Inf. Pin 7 5.6K2 2202 822 822 822 5K2 1.52 02 02 332 22.2KS2 202 242 132 582 1.52 Inf. 45 6 789 Inf. 25 Meg. Inf. 40 Meg. 40 Meg. 35 Meg Pin 8 10 Meg. 1808 132 202 4.52 622 02 Inf. Pin 9 T470K2 TOP CAP 100K2 10 11 L4 42 Meg 40 Meg 40 Meg 02 T Measured From Output Of Ml. 1. DC Vo

31、ltage measurements are af 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. 4. Line voltage maintained aM 17 volts for volt- age readings.

32、5. Front panels controls set at minimum. 6. Where readings may vary according to the setting of the service controls, both minimum and maximum readings are given. RadioFans.CN L13 C23 C24 C19 R17 L10 C15 C14 RF TUNER-BOTTOM VIEW RadioFans.CN CHASSIS BOTTOM VIEW-C/ PAGE 18 RadioFans.CN CAPACITOR IDEN

33、TIFICATION PAGE RadioFans.CN CHASSIS BOTTOM VIEW-RE PAGE 12 RadioFans.CN H) RESISTOR IDENTIFICATION PAGE 17 RadioFans.CN RAYTHEON MODELS 7DX21, 7DX22P, 18DX21A viocng IA xndxno oaaiA OTA xndxno oianv 6A Z/l dWVJTV 1 H31IWH I 1 ODV 1laa oaaiA 09V rr M 1 A dWVdIpJC dWVJI PUJ 1 ZA lL ANOO RadioFans.CN

34、TUBES (SYLVANIA or Equivalent) PARTS LIST AN CAPACIl ITEM No. VI V2 V3A V3B V4A V4B V5A V5B V6 V7 V8 V9 V10 Vll V12 V13 V14 V15 V16 V17 V18 USE RF Amp. Converter 1st IF Amo. 1st Video IF 2nd Video IF 2nd Video IF 3rd Video IF 3rd Video IF Detector Video Output Llmlter Ratio Det.-AF Amp. Audio Output

35、 Sync. Sep. -DC Rest. Vert. Multi- vibrator Vert. Output Hor. Multi- vibrator Hor. Output HV Osc. HV Rectifier Picture Tube REPLACEMENT DATA BELJ10NT PART No. 6BH6 6J6 6BA6 6AG5 6BA6 6AG5 6BA6 6AGS 6AL5 12AU6 12AU6 19T8 25L60T 12AU6 12SN7GT 12SN7GT 12SN7GT SOL6GT 50L6GT 1B3GT 7JP4 STANDARD REPLACEME

36、NT 6BH6 6J6 6BA6 6AG5 6BA6 6AG5 6BA6 6AG5 6AL5 12AU6 12AU6 19T8 25L6GT 12AU6 12SN7GT 12SN7GT 1SSN7GT SOL6GT SOLOGT 1B3GT 7JP4 RMA BASE TYPE 7CM 7BF 7BK 7BD 7BK 7BD 7BK 7BD 6BT 7BK 7BK 9E 7AC 7BK 8BD 6BD 83 D 7AC 7AG 3C 14G NOTES Used in models 7DX21 and 18DX21A Used in model 7DX22P Used In models 7D

37、X21 and 18DX21A Used In model 7DX22P Used in models 7DX21 and 18DX21A Used in model 7DX22P 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. Cl C2A B C 03 04 C5 C6 C7 C8 C9 010 Oil C12 013 C

38、14 C15 016 017 C18 019 020 C21 C22 C23 C24 C2S 026 027 028 029 030 031 032 033 C34 035 036 037 038 039 C40 041 C42 043 C44 C45 046 047 048 C49 050 051 052 053 054 055 C56 057 C58 059 060 061 062 C63 C64 C65 066 C67 RATING CAP. 120 120 30 JO 10 10 10 10 1000 1000 B20 220 1000 1000 LOOO .5 .5 L 1000 L

39、OOO 1000 2.2 31 7 51 2.5 10 1000 LOOO !20 220 220 220 17 LOOO 1000 1000 1000 1000 LOO 47 1000 1000 1000 LOO 1000 47 1000 1000 1000 1000 looo 1000 100 1000 01 1 5000 5 1000 100 25 05 01 47 500 j30 002 01 VOLT 150 150 150 25 150 50 50 150 500 500 500 200 200 200 200 200 500 500 600 200 REPLACEMENT DAT

40、A BELMONT PART No. B-8H-15664 B-8C-15948 A-8C-11495 A-8C-13132 A-8C-13132 A-8C-11495 C-8G-13201 C-8G-13201 C-8G-16045 C-8G-16045 C-8G-13201 0-8G-13201 0-8G-13201 A-8G-12495 -7 A-8G-12495 -7 A-8G-12495 C-8G-13201 C-8G-13201 C-8G-13201 A-8G-12495 -4 0-83-11891 C-8G-15224 0-80-11891 0-8G-15737 C-8G-117

41、89 C-8G-13201 C-8G-13201 C-8G-16045 C-8G-16045 C-8G-16045 C-8G-16045 C-8F3-109 0-8G-13201 C-8G-13201 C-8G-13201 C-8G-13201 C-8G-13201 C-SG-11734 0-8F3-109 C-8G-13201 C-8G-13201 C-8G-13201 C-8G-11734 C-8G-13201 C-8F3-109 C-8G-13201 C-8G-13201 C-8G-13201 C-8G-13201 0-8G-13201 0-8G-13201 C-8G-11734 C-8

42、G-13201 C-8D-11738 C-SD-10771 A-8G-13962 C-8G-12166 0-80-13201 C-8G-11734 C-8D-10775 0-8D-10770 C-8D-11738 C-8F3-109 C-SG-11731 C-8F3-119 C-8D-10778 C-8D-11738 AEROVOX PART No. AFH24D AFH2412D4A PRS150/12 PRS50/10 PRS50/10 PRS150/12 1468-001 1468-001 1468-00005 1468-001 1468-001 1468-001 1468-001 14

43、68-001 1468-0001 1468-00005 1468-001 1468-001 1468-001 1468-0001 1468-001 1468-00005 1468-001 1468-001 1468-001 1468-001 1468-001 1468-001 1468-0001 1468-001 P488-01 P288-1 1467-005 1468-OOOOOE 1468-001 1468-0001 P488-25 P288-05 P488-01 1408-00005 1467-0015 1468-0003 3688-002 P488-01 CORNELL- DUBILI

44、ER PART No UP 55515C BR1015 BR105 BR105 BR1015 1WSD1 1W5D1 5W5Q5 1W5D1 1Wus Control riz. Centering Control -t. Centering Control IDENTIFICATION CODES IISTORS ARE - 10% UNLESS OTHERWISE STATED. e :en Decoupling 20$ ode ressor Grid Shunt rid Coll Shunt rid late Decoup. 2055 Id thode ate 1C Supp. i c S

45、upp . Grid See note 3 20% Decoup. Suppressor Grid . See note 1 Cathode See note 4 5% work Sa% Grid Decoup. 2C% Suppressor Grid See note 1 kathode See note 4 5g Transformer Shunt See note 5 Decoup. 205 Suppressor Grid see note 1 Cathode See none 4 5% Nork ork de Load ITEM No. R41 R42 R43 R44 R45 R46

46、R47 R48 R49 R50 Rol R52 R53 R54 R55 R56 RS7 R58 R59 R60 R61 R62 R63 R64 R6S R66 R67 R68 R69 R70 R71 R72 R73 R74 R75 R76 R77 R78 R79 R80 R81 R82 R83 R84 R85 R86 R37 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 R101 R102 R103 R104 R105 R106 R107A B R108 Note Note Note Note Note Note Note Note

47、Note RATING RESISTANCE 100KH 33002 150K2 10K2 82002 470K2 10002 22K2 33K2 33K2 10 Meg. 470Kffl 470K2 1802 5602 1 Meg. 220K2 180K2 2702 22K2 47KS 150K2 47002 47002 18K2 4.7 Meg. 330K2 10002 6.8 Meg. 10 Meg. 5.6 Meg. 5.6 Meg. 10 Meg. 68K2 5602 18K2 82002 47K2 lOOKffi 12002 220K2 2.2 Meg. 622 2.2 Meg.

48、15K2 27002 220K2 100K2 100K2 1 Meg. 4.7 Meg. 4.7 Meg. 4.7 Meg. 4.7 Meg. 2.2 Meg. 2.2 Meg. 2.2 Mog. 2.2 Mog. 2.2 Meg. 2.2 Meg. 2.2 Meg. 2.2 Meg. 1.5 Meg. 10 Meg. 10 Meg. 1502 472 622 10K2 1 - Not use 2 - Used Ir 3 Model r 4 - Model 5 - Model 6 - Model r 7 Model 8 - Model - 9 - Model n WATTS 2 I I 2 1

49、 1 i I 2 2 2 1 i 2 i 5 I| 2 | 2 2 P. 1 1 1 Z - 3 i! 2 I 2 2 1 1 1 1 1 2 1 2 1 i REPLACEMENT DATA BELMONT PART No. C-9B1-86 C-9B1-68 C-9B1-26 C-9B1-19 C-9B1-73 C-9B1-94 C-9B1-13 C-9B1-78 C-9B1-80 C-9B1-80 C-9B1-37 C-9B1-94 C-9B1-94 C-9B2-53 C-9B2-59 C-9B1-31 C-9B1-27 C-9B1-89 C-9B1-55 C-9B1-78 C-9B1-82, C-9B1-26 C-9B1-70 C-9B1-70 C-9B2-77 C-9B1-35 C-9B1-92 C-9B1-159 C-9B1-37 C-9B1-249 C-9B1-249 C-9B1-37 C-9B1-84 C-9B1-59 C-9B1-77 C-9B1-73 C-9B1-82 C-9B1-86 C-9B1-161 C-9B1-27 C-9B1-102 C-9B2-130 C-9B1-102 C-9B1-76 C-9B2-66 C-9B1-27 C-9B2-