Meck-XL750-Sams-76-14电路原理图.pdf

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1、PHOTO FACT* Folder MECK MODEL XL75O HORIZ. Sweep) 69MC (10MC Sweep ) 63MC (lOMC Sweep) 57MC (10M3 Sweep) MARKER GENERATOR FREQUENCY 211.25MC 215.75MC 205.25MC 209.75MC 199.85MC 203.75MC 191.25MC 195.75MC 187.25MC 191.75MC 181.25MC 185.75M3 175.25MC 179.75MD 83.25MC 87.75MC 77.25MC 81.75MC S7.25MC 71

2、.75MC 61.25MC 65.75MC 55.25MC 59.75MC CHANNEL 13 12 11 10 9 8 7 6 5 4 3 Z CONNECT SCOPE Vert . Amp . to PointJ. Low side to chassis. ADJUST A9 A10 All A12 A13 A14 A 15 A1S A17 A18 A19 A20 REMARKS Check for proper response as per Fig 2. Since the oscillator circuits for each channel are Individually

3、tuned, only those channels requiring alignment need be adjusted. 26.5MC /NOT LESS THAN 7oA FIG. I FIG. 2 PAGE 6 RadioFans.CN j) ) (05 (C20) (C16) (CIS) RF TUNER-RIGHT SIDE RF TUNER-LEFT SIDE PAGE 7 RadioFans.CN TJ O m 00 VOLTAGE AND RESISTANCE MEASUREMENTS VOLTAGE READINGS RESISTANCE READINGS Item V

4、 1 V 2 V 3 V 4 VS V 6 V7 V8 V9 V 10 V 1 1 V12 V13 V 14 V 15 V 16 V17 V 18 V19 V20 Tube 6AG5 6AG5 6C4 6AU6 6AU6 6AU6 6AL5 6AC7 12AU7 6AU6 6T8 6V6GT 6SN7GT 6AL5 6SN7GT 6BG6G 6W4GT 1B3GT 5U4G 10BP4 Pin 1 -.5VDC -1.2VDC 150VDC -.4VDC -.4VDC 0V .1VDC ov 125V DC T1.2VDC T-.5VDC T OV -24VDC 1.2VDC .3VDC .1

5、VDC OV Pin 2 OV OV OV OV OV OV -3VDC 6.3VAC OV T6.6VDC T-.8VDC T6.SVAC 70VDC 145VDC -1.2VDC 250VDC OV OV Pin 3 6.3VAO OV OV OV OV OV OV 1VDC 6.2VDC T OV T-.5VDC T210VDC OV OV 10VDC 9;6VDC 430VDC Pin 4 OV S.3VAC 6.3VAC 6.3VAC 6.3VAC 6.3VAC 6.3VAC -2.7VDC 6.3VAC T6.3VAC T OV T225VDC OV S.3VAC -3.2VDC

6、OV OV Pin 5 125VDC 140VDC 150VDC 135VDC 135VDC 140VDC -2.8VDC 1VDS 6.3VAC T220VDC T 6. 3V AC T-12VDC 300VDC OV 100VDC .1VDC 360VDC Pin 6 85V DC 75VDC S-.7 VDC 135VDC 135VDC 140VDC OV 175 VDC 5.2VDC T50VDC T OV OV 5VDC 21VDC OV 10VDC OV OV Pin 7 OV OV 4.2VDC .8VDC .8VDC 1VDC -.4VDC OV OV T6.6VDC T OV

7、 T OV 6.3VAC OV 6.3VAC 6.3VAC T6.3VAC Pin 8 170VDC 1VDC T-.7VDC T OV OV OV 260VDC T OV Pin 9 OV T90VDC TOP CAP tt DO NOT MEASURE. OV OV 400VDC 1VDC OV PIN 10 360VDC 390VAC PIN 11 120VDC OV PIN 12 6.3VAC 390VACOV400VDC Taken With Vacuum Tube Voltmeter. * Do Not Measure. T Measured From Pin 8 Of V12.

8、tan 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 VM V 15 V 16 V17 V 18 V19 V20 Tube 6AG5 6AG5 6C4 6AU6 6AU6 6AU6 6ALS 6AC7 12AU7 6AU6 6T8 6V6GT 6SN70T 6AL5 6SN7G-T 6BG6G 6W4GT 1B30T 5U4G 10BP4 Pin 1 2 Meg. 1 Meg. 30K2 2 Meg. 2 Meg. .IS! 102 Inf. T8KS2 T470K2 Inf. Inf. 2 Meg. 4.7 Meg 4.7 M

9、eg. 1 Meg. Inf. Inf. Inf. OS! Pin 2 oa OS! Inf. OS! OS! 02 1000S! .22 1 Meg. T1000S2 T15KS! t.Ba 3 Meg. 1.4 Mee 4.7 Meg 32KS! OS! Inf. Inf. 200K2 300K2 Pin 3 .28 OS! OS! OS! OS! OS! OS! 600! 3900 S! IDS! Inf. 10002 02 OS! 1500S! 82S! ISKffl Inf. Inf. PIN 10 1500S! Pin 4 02 .2S! .22 .22 .22 .22 .2! 1

10、0KE .28 r.2s IOS2 200S! 2 Meg. .28 150K2 Inf. Inf. Inf. 602 PIN 11 100KS! Pin 5 tlOKS! T350S! 30K2 T3002 T180S! T190S2 9.5K2 600S! .28 1500 T.22 250Kffi 7.5K2 30K2 300K2 1 Meg. 2002 Inf. Inf. PIN 12 .2! Pin 6 T40KS! T100KS! 22KS! T300S! T180S! T90S! Inf. T25KS! 47KS! t!2K2 TOS! Inf. 56022 Inf. 15008

11、 Inf. Inf. Inf. 552 Pin 7 02 02 4702 802 802 802 680K2 02 02 T 10002 Toa TOS! L.2S2 30KS! .28 .28 t.22 Inf. Inf. Pin 8 T5.6K2 270K2 I470K2 toa 02 02 t 85002 TOS! Inf. 200KS! Pin 9 02 330K2 * CAP 1602 * CAP 400S2 T Measured * Measured * Measured From Pin 8 From Pin 2 From Pin 3 Of V12. Of V19. Of V17

12、0 1. DC Voltoge measurements ore at 20,000 4. Line voltage maintained at 117 volts for volt- ohms per volt; AC Voltage measured ot 1,000 Oge readings. 2. Pin numbers are counted in a clockwise direc- tion on bottom of socket. 3. Measured values are from socket pin to com- mon negafive unless otherwi

13、se stated. 5. Front panels confrols set at minimum. 6. Where readings may vary according to the setting of the service controls, both minimum ond maximum readings are given. RadioFans.CN B+ B- SOUND IFVI0 RF AMP MIXER OSC , * 1st VIDEO IF V4 1 3rd VIDEO IF V6 AGC VIDEO DET RC-3470: RO-3150: RC-3560:

14、 RC-3100; RC-3270: RC-3220; RC-3560; RC-3068( RC-3100 RC-4082C RC-6820 RX-lOOli RC-3003C RC-3100 RC-5100 RC-3015C NOTE 1 ; Some models use two flmnllnf nf Toa1a1-an RESISTORS ITEM No. R7 R8 R9 RIO Rll R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36

15、 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 RATING RESISTANCE 3902 5602 5602 10002 33K2 10K2 18K2 1C* 47002 82K2 1 Meg 82K2 22K2 4708 68008 22K8 5% 1002 1002 82002 10% 828 1002 3302 22K8 822 1008 1 Meg 82002 10% 822 1002 680K2 39K2 82002 10% 10008 1202 27K2 22K8 22K8 56008 22008

16、 270K2 47K2 820K2 220K2 10K8 10008 470K2 10002 WATTS i X I J 1 X i X I 2 i i i X 1 X X 4 3 1 1 i i 1 1 i i 4 REPLACEMENT DATA MECK PART No. RC-43900 RC-35600 RC-35600 RC-31001 RC-33301 RO-52202 RC-31000 RC-31000 RC-38201 RC-30820 RC-31000 RC-33300 RC-32202 RC-30820 RC-31000 RC-31004 RC-38201 RC-3082

17、0 RC-31000 RC-36803 RC-43902 RC-38201 RC-31001 RC-31200 RC-42202 RC-45601 RO-32201 RC-32705 RO-34702 RC-38203 RC-32203 RC-31002 RC-31001 RC-34703 RC-31001 IRC PART No. BTS-18K BW-i-330 BTS-1 Meg BTS-680K BTA-39K BTS-8200 BTS-1000 BTA-22K BTA-5600 BTS-2200 BTS-270K BTS,7K BTS-820K BTS-220K BTS-10K BT

18、S-1000 IDENTIFICATION CODES ALL RESISTORS t 2 0 % UNLESS OTHERWISE STATED Padder Padder Padder RF Grid RF Screen RF Plate RF Plate Coll Shunt Mixer Grid Coil Shunt Mixer Grid Mixer Grid Mixer Screen Oscillator Grid Oscillator Cathode Oscillator Plate Oscillator Plate Decoupling Decoupling Network Mi

19、xer Plate Decoupling 1st Video IF Grid 1st Video IF Cathode 1st Video IF Decoupling AGC Network 2nd Video IF Grid 2nd Video IF Cathode 2nd Video IF Decoupling AGC Network 3rd Video IF Grid Coll Shunt 3rd Video IF Cathode 3rd Video IF Decoupling AGC Diode Load Voltage Divider Video Det. Diode Load Bi

20、as Network Parasitic Suppressor Video Amp. Plate See note 1 Video Amp Plate See note 2 Voltage Divider Voltage Divider Picture Tube Grid DC Restorer Load DC Restorer Load Voltage Divider Voltage Divider Voltage Divider Accelerating Anode Decoupling Sound IF Grid Sound IF Cathode NOTE NOTE part numbe

21、r RC-5560; Some models use two amount of resistant part number RC-5430; Some models use 680 Not used in all modi ITEM No. Tl RATING PRI. 117VAO L.7 A SEC. 4 6.3VAC 1.2 A SEC. 1 800V CT .2AD3 SEC. 2 5VAC 3 A SF TO-10021 TO-10026 TO-10025 T Drill new mounting hole. RadioFans.CN IPTIONS (Continued) :ON

22、TO RESISTORS CCONT.J ERIE PART No. P2M-005 P2-335-01 P1K-22 P2-335-01 P2M-002 P2M-005 P2M-005 P2M-0047 P2L-001 P2L-001 P2-335-01 P2M-005 P2K-330 P2K-390 P2K-270 10-500 SPRAGUE PART No. TM-25 TM-15 TM-15 TM-11 MS -425 TM-11 1FM-22 1FM-25 1FM-25 1FM-25 TM-1 TC-S 1FM-21 1FM-21 TM-11 TM-15 TM-25 TM-15 1

23、FM-34 1FM-325 TM-15 TC-2 TM-1 TC-2 TM-11 TM-11 IDENTIFICATION CODES AND INSTALLATION NOTES Audio Coupling Audio Coupling Bias Filter Output Plate Bypass DC Res. Cath. Bypass Sync Coupling Integrator Network Integrator Network Integrator Network Vert. Osc. Grid Cap. Vert. Discharge Vert. Sweep Coupli

24、ng Horlz. Sync Coupling Horlz. Sync Coupling AFO Filter Horlz. AFC Feedback AFC Filter Horlz. Osc. Grid Cap. Horiz. Feedback Fixed Trimmer Horiz. Discharge Horlz. Sweep Coupling Horiz. Feedback * Koriz. Output Screen By Horiz. Output Cath. Byp Damper Filter Damper Filter Horlz. Sweep Coupling High V

25、oltage Filter Line Filter Line Filter 3. IIC hd INSTALLATION NOTES Vert. Hold Control 1 , _ Horlz. Hold Control / Dual Concentric Contrast Control - Tapped 5002) Brightness Control (Dual Concentric) Volume Control Attach to R3A Per Instructions Vert. Size Control Vert. Linearity Control Focus Contro

26、l (Wire Wound) ITEM No. R53 R54 R55 R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R73 R74 R75 R76 R77 R78 R79 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 R101 R102 RATING RESIST 39K2 12K2 looos 15K2 INCE 68002 10% 6800S 470KS 330KJ lOOKf

27、 SSOKf 10% 5% 180K2 5% 4700f 470Kf 3902 1 Meg 3900r S900S 3900!T 22K2 8200210% 1 Meg 1.5 Meg 6.8 Meg 100K2 2.2 Meg 560B 68002 10% 33002 100K2 100K2 4.7 Meg 470K2 27K2 47002 15002 56002 100K2 270K2 22K2 56K2 682 1 Meg 822 1 82002 60002 3.32 1 Meg 10002 152 NOTE 1 : 5% 0% 10% 10? WATTS 1 I . . i r i ,

28、 . i I : i i , 1 1 2 20 i i 2 i I REPLACEMENT DATA 1 MECK PART No. RC-43902 RC-3 RC-3 1001 1502 RC-36801 RC-3 RC-3 RC-3 RC-3 RC-3 6801 4703 3303 1003 3303B RC-31803B RC-3 RC-3 RC-4 RC-3 RC-3 RC-3 RC-3 4701 4703 3900 1004 3901 3901 3901 RC-32202 RC-38201 RC-38201 RO-31004 RC-31504 RC-36804 RC-31003 R

29、C-32204 RC-35600 RC-36801 RC-33301 RC-31003 RC-31003 RC-34704 RC-34703 RC-32702 RC-34701 RC-3 RC-3 1501 5601 RC-31003 RC-3 RC-3 RC-3 2703 2202 5602 RC-30680 RC-3lULKt RC-40820 RC-58201 RX-10012 RC-30030 RC-3 RC-5 1004 1001 RC-30150 IRC PART No. BTS-15K BTS-6800 BTS-6800 BTS-470K BTS-330K BTS-100K BT

30、S-330K 5% BTS-180K 5% BTS-4700 BTS-470K BTA-390 BTS-1 Meg BTS-3900 BTS-3900 BTS-3900 BTS-22K BTS-8200 BTS-8200 BTS-1 Meg BTS-1. 5 Meg BTS-6.8 Meg BTS-100K BTS-2.2 Meg BTS-560 BTS-6800 BTS-3300 BTS-100K BTS-100K BTS-4.7 Meg BTS-470K 5% BTS-27K BTS-4700 BTS-1500 BTS-5600 BTS-100K BTS-270K BTS-22K BTS-

31、56K BTS-1 Meg BW-1-82 BT-2-8200 DG-6000 BT-2-1000 BW-i-15 IDENTIFICATION CODES Sound IF Screen V S E oltage Divider ound IF Decoupli e-emphasis Ratio Det. Diode R A A C V atio Det. Diode F Grid F Plate utput Grid oltage Divider ng Load Load Voltage Divider M V F S S S S oltage Divider oltage Divider

32、 liter ync Separator Or ync Separator Ca ync Separator PI ync Separator PI Integrator Intepratnr id thode ate ate Integrator Vert. Oscillator Grid See note 3 Vert Oscillator Plate Voltage Divider Voltage Divider Vert. Amp. Grid Vert. Amp. Cathode Vert. Amp. Plate Decoupling Vert. Peaking Horlz. Phas

33、e Det. Load Horlz. Phase Det r, Horiz. Phase Det. Horiz. AFC Filter Feedback Network Load Network Feedback Network H Horlz. Oscillatororiz. Oscillator Horlz. Oscillator H F F orlz. Oscillator liter liter Cathode Plate Grid Plate Decouplln,g Parasitic Suppressor Horlz. Output Gria Horiz. Output Catho

34、de Horlz. Output Screen Damper Filter (Wire Wound) High Voltage Filament H FIgh Voltage Filtocus Coil Shunt Bias Network 3r See note 4 Some models use two 56K2, 2 watt, resistors in parallel to obtain correct part number RC-55602. NOTE 2 : RS IDENTIFICATION CODES LL RESISTORS * 20% UNLESS OTHERWISE

35、STATED der der der Grid Screen Plate Plate Coil Shunt er Grid Coil Shunt er Grid er Grid er Screen illator Grid illator Cathode illator Plate illator Plate Decoupling NOTE 3 : NOTE 4 : Some moJels usetwo 43K2, 2 watt, resit amount of resistance and wattage. Each part nujiber RC-E Some models use Not

36、 used in all 4302. tors in parallelto obtain correCt resistor obtainable under manufacturers 680K2 relslstor In this application. models. TRANSFORMER (POWER) ITEM No. Tl f t | RATING PRI. 17VAC SL.7 A EC. 4 5.3VAC D 1.2 A SEC. 1 800V CT .2Aro SEC. 2 5VAC 3 A SEC. 3 6.3VAC 5.9 A MECK PART No. TP-1000

37、3 REPLACEME STANCOR PART No. P-6165 4 P-6134 NT DATA CHICAGO PART No. MERIT PART No. P-3955 &. P-2944 coupling Network xer Plate Decoupling t Video IF Grid :t Video IF Cathode t Video IF Decoupling C Network .d Video IF Grid .d Video IF Cathode A Video IF Decoupling C Network d Video IF Grid Coil Sh

38、unt d Video IF Cathode d Video IF Decoupling C Diode Load Itage Divider deo Det. Diode Load as Network rasitic Suppressor deo Amp. Plate See note 1 deo Amp Plate See note 2 Itage Divider Itage Divider cture Tube Grid Restorer Load Restorer Load Itage Divider Itage Divider Itage Divider celeratlng An

39、ode Decoupling und IF Grid und IF Cathode o Ss m v Ui O TRANSFORMER (SWEEP CIRCUITS) ITEM No. T2 T3 T4 T5 T6A B T7 RATING DC RESISTANCE SEC. 702 2302 3852 Tap 1252 5602 142 622 2552 PRI. 8002 SEC.l 13.62 Tap .6 SEC. 2 02 72 REPLACEMENT DATA MECK PART No. LG-10017 TO-10022 TO-10020 2 TO-10021 TO-1002

40、6 TO-10025 STANCOR PART No. A-8121 A-8118 A-8116 DY-1 FC-10 CHICAGO PART No. TBO-1 TFB-1 TSO-1 T MERIT PART No. A-4000 A-3035 T NOTES Horlz. AFC Coll Vert. Block. Osc. Trans Horlz. Output Trans. Ver t . Output Trans . Horlz. Deflection Yoke Vert. Deflection Yoke Focus Coll T Drill new mounting hole.

41、 PAGE 15 RadioFans.CN PARTS LIST AND DESCRIPTIONS (Continued) TRANSFORMER (AUDIO OUTPUT) ITEM No. T8 RATING IMPEDANCE PHI. 52002 SEC. 3.52 DC RES. PR!. 2952 SEC. .42 REPLACEMENT DATA MECK PART No. Part of speaker (SR- 10019) STANCOR PART No. A-3877 t CHICAGO PART No. RO-201 i MERIT PART No. A-S930 i

42、 INSTALLATION NOTES 4 Bend mounting tabs down and mqunt on original bracket. SPEAKER ITEM No. SP1 SP2 RATING FIELD RES. PM CONE DIA. 4 13/16 V. C. IMP. 3.52 V. C. DIA. 9/16 REPLACEMENT DATA MECK PART No. SR-10019 t JENSEN PART No. ST-107 i Mod.P5-V QUAM PART No. 5A1 NOTES t Includes output transform

43、er Remount output transformer * Drill and tap magnet frame. FILTER CHOKE ITEM No. LI RATINGS TOTAL DIRECT CURRENT .200 A D. C. RESISTANCE 322 INDUCTANCE (0 CURRENT 1000 ! l.SHmrles REPLACEMENT DATA MECK PART No. LG-10021 STANCOR PART No. 0-2335 + CHICAGO PART No. TR-4200+ MERIT PART No. C-E991+ INST

44、ALLATION NOTES + Drill one new mounting hole. . COILS (RF-IF) ITEM No. L2 L3 L4 L5 L6 L7 L8 L9 1 4 . 0 Lll L12 L13 L14 L15 LI 6 L17 L18 L19 L20 ISO. USE Ant. Input coll Fll. Choke Fll. Choke 1st Video IF Trans. Fll. Choke 2nd Video IF Trans. Fll. Choke RF Choke 3rd Video IF Trans. Fll. Choke RF Chok

45、e 4th Video IF Trans. Peaking Coll Peaking Coll Peaking Coll Peaking Coll Sound IF Take-Off Ratio Det. Trans . Horlz. Linearity Control Horlz. Size Control DC RES. PRI. 02 CT 02 02 .12 02 .12 02 3.52 .12 OS! 3.52 .12 72 182 92 202 1.52 42 352 . 4 2 SEC. 02 1.52 .22 REPLACEMENT DATA MECK PART No. TS-

46、10030 LG-10019 TS-10030 1C-10019 LG-10020 TS-10030 LG-10019 LO-10020 TS-10030 LO-10014 LG-10016 LG-10018 LO-10015 TS-10042 TS-10034B TO-10024 TO-10023 MEISSNER PART No. NOTES Part of RF Tuner Assembly n ii if n ti Inductance - 37 Microhenries Inductance - 37 Microhenries Inductance - 100 Microhenrie

47、s Inductance - 600 Microhenries 150 Microhenries - wound on 18K2 resistor Inductance - 300 Microhenries MISCELLANEOUS ITEM No. ML M2 PART NAME RF Tuner Assembly Ion Trap Knob Knob Knob Knob Knob Tuner Escutcheon Plate Wood Cabinet MECK PART No. TT-10002 IT-10000 K-10066 K-10068 K-10069 K-10070 K-10079 N-10007B ZW-10037 NOTES Hepner Type #501 Rohden #R3000-300 with #1004 spring and outer gold ring Rohden #3000-702 (Inner Knob) Rohden #153151-0 (Inner Knob) Rohden 1153150-0 (Outer Knob - Gold Arrow) Rohden #700 - Spring Mounting - Flat gold ring PAGE 16 RadioFans.CN