Meck-XA-701-Sams-61-16电路原理图.pdf

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1、PHOTO FACT* Folder MECK MODEL XA-7O1 CONTRAST CONTROL CHANNEL SELECTOR VOLUME CONTROL ON-OFF SWITCH HORIZ.HOLDBRIGHTNESS CONTROL FINE TUNING o o HECK MODEL XA-701 TRADE NAME Heck Model XA-701 MANUFACTURER John Meek Industries, Plymouth, Indiana TYPE SET Television Receiver TUBES Twenty-Two POWER SUP

2、PLY 105-125 Volts. 60 cvcle TUNING RANGE-Chanr.els 2 through 13. RATING.97 Amps. D3W RadioFans.CN I m 00 VOLTAGE AND RESISTANCE MEASUREMENTS VOLTAGE READINGS Item V 1 V 2 V 3 V 4 V 5 V 6 V7 V 8 V9 V 10 V 1 1 V12 V13 V 14 V 15 V 16 V 17 V 18 V 19 V20 V21 Tube 6BH6 6AG5 6C4 6AU6 6AU6 6AU6 6AL5 6AU6 6A

3、U6 6AU6 6AL5 6AT6 25L6GT 12SN7GT 12SN7GT 12SN7GT 12SN7GT 12EN7GT 1B3GT 25Z6GT 6X5GT Pin 1 -.1VDC -.4VDC 135VDC -.1VDC -.1VDC OV ov .2VDC OV -.4VDC -.1VDC -.5VDC OV * 18VDC * .8VDC t 18VDC * .8VDO -100VDC Pin 2 .5VDC OV OV OV OV OV OV OV 3.8VDC OV -.1VDG OV 39VAC t 110VDC 100VDC * 110VDC 135VDC 205VD

4、C Pin 3 OV OV OV 11VAC 17V AC 24VAC 30VAC 36VAC 42VAC 22VAC 16VAC 39VAC 120VDC * 22VDC t 30VDC * 22VDO * 13VDC 117VAC Pin 4 6. 3V AC 6.3VAC 6.3VAC 17VAC 24VAC 30VAC 36VAC 42VAC 49VAC 16VAC 11VAC 33VAC 112VDC t 12V DC t 1 RVDC * 21VDC t .8VDC -1QBVDC Pin 5 L35VDC L20VDC L35VDC L20VDC 120VDC 125VDC 1.

5、7VDC 90VDC 26VDC 125VDC OV OV -2VDC 4-27VDC 4-17VDC 90VDC *57VDC *22VDC 14SVDC 2D5VDC Pin 6 115VDC 83VDC OV 120VDC 120VDC 125VDC OV 125VDC 125VDC 43VDC OV OV OV t- 22VDC * 30VDC * 22VDC t 18VDC 117VAC Pin 7 OV OV 3.4VDC .7VDC .6VDC .7VDC -.3VDC 7.2VDC 3.8VDC OV -.2VDC 47VDC 55VAC 68VAC 80VAC 33VAC 9

6、0VAC _90VAC Pin 8 1.2VDC 55VAC SSVAC 22VAC 80VAC 11WAC Pin 9 t DO NOT MEASURE OV OV 4QVAC 5.8VAC 1 30VT1C 235VDC P.35VDC OV -i 45vnn 235VDC nv OV 7DVAC OV 1T7VAC 360VDC Pins 1 2 3 456789 1 0 V22 7JP4 11VAC 125VDC 1.8VDC 0V t 0V T T t t 11 12 OV OV 13 14 T 5.8VAC Measured froi pin 5 of V20 t Do not m

7、easure. An accurate measurement can not be made, due to high Impedence of circuit. RESISTANCE READINGS item V 1 V 2 V 3 V 4 V5 V 6 V7 V8 V9 V 10 V 1 1 V 1 2 V13 V 14 V 15 V 16 V 17 V18 V 19 V20 V21 Tube SBH6 6AG5 6C4 6AU6 6AUS 6AU6 6AL5 6AU6 6AU6 6AU6 6AL5 6AT6 25L6GT 12SN7GT 12SN7GT 12SN7GT 12SN7GT

8、 12SN7GT 1B3GT 25Z6GT 6X5GT Pins re27JP4 Pin 1 2.5 Meg. 1 MeK. 20K2 2.5 Meg:. 2.5 Mes. .22 .22 1 MeK. 1 Mee. 470K2 Inf. 10 Mec. Offi 4-llKffi t4.7Mee. 4-5KS2 t4.7Mee. 8K2 Inf. Inf. Inf. 1 2 # 3S2 150K2 Pin 2 1002 02 Inf. 02 Offl 02 50KS2 02 6.8K2 OS Inf. OS 242 AC Voltages measured at 1000 ohras. 2.

9、 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 minimum. 6. Where readings may vary according to the setting of the servic

10、e controls, both minimum and maximum readings are given. RadioFans.CN ALIGNMENT INSTRUCTIONS Inject the IF signal by means of a FLOATING tube shield over the mixer tube VS. DUMMY ANTENNA Tube Shield Tube Shield SIGNAL GENERATOR COUPLING High side to Tube Shield over mixer Tube V2. Low elde to chassi

11、s. SIGNAL GENERATOR FREQUENCY 25. SMC (No. Mod.) S3. SMC (No. Mod.; CHANNEL 9 CONNECT VTVM DC Probe t o Point A. Common to chassis. ADJUST Al, A2 A3, A4 REMARKS Adjust for maximum deflection. Attenuate signal generator to maintain 1 volt reaj ing. on VTVM. it , it t, t, Connect synchronized sweep vo

12、ltage from signal generator to horizontal amplifier of scope for horizontal deflection. DUMMY ANTENNA Tube Shield DUMMY ANTENNA 5000MMF 3000MMF SWEEP GENERATOR COUPLING High side to Tube shield. Low side to chassis. SIGNAL GENERATOR COUPLING High side to pin 1 (Grid) 6AU6 (V8). Low side to chas- sis

13、. SWEEP GENERATOR FREQUENCY 24MC (10MC Sweep) SIGNAL GENERATOR FREQUENCY 4. SMC (Very Accurate) MARKER GENERATOF FREQUENO 21.6KC and 26. IMC SC CHANNEL 9 CHANNEL C?cOPEr 9 Vert. Amp. to Point A. Low side to chassis. JUND IF ALIGNMENT CONNECT VTVM DC Probe to point D. Common to chassis. DC Probe to P

14、oint B. Common to Point C. ADJUST A5, A6 A7 ADJUST REMARKS Al , A2, Observe pattern obtained and see A3, A4 that markers appear as per Fig. 1. If not, slight adjustment of Al, A2 A3, and A4 may give desired curve. REMARKS Adjust for maximum deflection. Adjust for zero reading. A positive and negativ

15、e reading will be obtained on either side of the correct setting. The RF and Mixer lines are pre-set at the factory and are very stable and normally do not require adjustment In the field. The local oscillator operates 24.35MC above the center frequency of each TV channel. To set the local oscillato

16、r, a separate BFO generator set at 24.35M3 Is used to obtain a zero beat with this difference frequency. Couple the BFO generator to the receiver by means of a few turns of hook-up wire coiled around the 6AL5 video detector (V7) . Connect a .01MFD capacitor between pin 1 (Grid) of the 6AU6 video amp

17、. (V8) to pin 1 of the 6AT6 audio Ar.ip. (V12). Turn the fine tuning control to the midpoint of Its ranf.e and set the channel selector switch to the channel which Is to be aligned. The oscillator circuits of the individual channels are Independent of each other and therefore only those channels req

18、uiring alignment need be adjusted. DUMMY ANTENNA Two 150SZ carbon res. SIGNAL GENERATOR COUPLING Insert 1502 resis- tor in each gener- ator lead and con- nect across the antenna Input. Connect BFO gener- ator as Indicated in above Instruc- tions. SIGNAL GENERATOR FREQUENCY 57MC 63MC 69MC 79MC 85MC 1

19、77MC 183I1C 189MC 195MC 201MC 207MC 213MC CHANNEL Z 3 4 5 6 7 e 9 10 11 12 13 CONNECT VTVM ADJUST A8 A9 A10 All A12 A13 A14 A15 A16 A17 A18 A19 REMARKS Adjust slugs or shift the c o l l turns for rough audio beat in the speaker. S NOT OVERv ( /TvtA FIG 1 1 / 95% 50 V?KER 1 HIGH VOLTAGE SUPPLY-BOTTOM

20、 VIEW PAGE 10 RadioFans.CN RadioFans.CN CHASSIS BOTTOM VIEW-CAPACITOR IDENTIFICATION LOZ-VX laaow D3W RadioFans.CN Zl RadioFans.CN CHASSIS BOTTOM VIEW-RESISTOR IDENTIFICATION LO/-VX laaow 03W RadioFans.CN AUDIO AMP V 12 AUDIO OUTPUT VI3 RATIO DET VIDEO AMP SYNC. SEP H-25 FI1-21E S-55 FM-33E 1-15 FM-

21、25 D-2 1-15 1-15 ?I1-25 S-45 ra-45 1-12 1-12 ri1-2l 11-215 Jll-25 1-12 1-22 1-11 1-12 11-25 M-25 1-11 (1-1 1-15 1-12 M-256 IDENTIFICATION CODES AND INSTALLATION NOTES A Filter - Doubler Cap. - Filter A A Filter Decoupling Stabilizing Cap. Sync. Sep. 4 DC Res. Cath. Bypass Ant. Coupling RF Coupling R

22、F Cath. Bypass Note 1 RF Screen Bypass AGC Filter Note 2 RF Coupling RF Bypass Note 2 Mixer Screen Bypass Osc. Feedback RF Bypass Osc. -Coupling Osc. Fll. Bypass IF Coupling Mixer. Plate Decoup. 1st IF Decoupling IF Coupling AGC Filter AGC Filter 2nd IF Decoupling AGC Filter RF Bypass Filament Bypas

23、s n 11 n N n ii IF Coupling RF Bypass n n Video Coupling Video Amp. Screen Byp. Video Coupling Sync. Coupling Hor. Sync. Coupling Fixed Trimmer Sound IF Grid Filter Sound IF Screen Byp. Sound IF Plate Decoup. Diode Load Cap. De-emphasis RF Bypass Audio Coupling n n Output Plate Bypass Integrator Net

24、. n n Vert. Osc. Feedback Vert. Coupling Vert. Discharge Vert. Coupling Vert. Sweep Coupling ITEM No. C68 C69 C70 071 072 073 074 075 076 C77 078 C79 080 031 C82 RATING CAP. .005 100 100 .01 .005 .005 .02 350 1500 1000 500 500 .02 .05 5000 VOLT 6000 500 500 600 6000 6000 400 500 500 10000 10000 400

25、600 REPLACEMENT DATA MECK PART No. CP60502 CM15101 OM15101 CP16103 CP60502 CP60502 CP14203 CM15351 CC15152 OM15102 C CXI 0000 CCX10000 CP14203 OP16503 CHX10002 AEROVOX PART No. 7584-005 1468-0001 1468-0001 P688-01 7584-005 7584-005 P488-02 1469-00035 1467-0015 1468-001 P488-02 P688-05 1467-005 CORNE

26、LL- DUBILIER PART No. DSTH 60D5 5W5T1 5W5T1 GT6S1 DSTH 60D5 DSTH 60D5 GT4S2 1W5D15 1W5D1 GT4S2 GT6S5 1DSD5 ERIE PART No. GP1K-100 GP1K-100 GP2-335-01 GP2L-0015 GP2L-001 GP2M-005 SOLAR PART No. STM-60- 005 10.5-31 MO. 5-31 ST-6-01 . STM-60- 005 ETM-60- 005 ST-4-02 1W. 5-215 1W.5-21 ST-4-02 ST-6-05 1W

27、.5-25 SPRAGUE PART No. TVM-256 1FI1-31 1FI1-31 TM-11 TVM-256 TVM-256 TM-12 1FM-33E 1FM-21E 1FM-21 TM-12 TI1-15 1FM-25 IDENTIFICATION CODES AND INSTALLATION NOTES Hor. Osc. Feedback Hor. Discharge Hor. Sweep Coupling II M II II II II RF Bypass Note 3 Fixed Trimmer HV Osc. Grid Cap. Fixed Trimmer Note

28、 4. HV Filter TN Oxide M M n M HV Osc. Fll. Bypass Hor. Cent. Cont. Bypass Line Filter Parallel sections to obtain desired capacity. Note 1. Some models use 500MMP in this application. Note 2. Some models use 5000MMF in this application. Note 3. Some models use 05MFD in this application. Note 4. Not

29、 used in all models. CONTROLS ITEM No. RIA B C R2A B R3A B R4A B R5A B R6A B R7A B R8A B R9A B RATING RESIST- ANCE 500K2 Shaft Switch 1 Meg. 250KE 1000B 25KB 10 Meg. Shaft 10 Meg. Shaft 10 Meg. Shaft 5 Meg. Shaft 5 Meg. Shaft 5 Meg. Shaft WATTS 4 4 4 4 4 4 4 4 4 REPLACEMENT DATA MECK PART No. VC1211

30、6A Not Req. Not Req. MC12112B VC12113B VC-12115B Not Req. VC12115B Not Req. VC12115B Not Req. VC12114A Not Req. VC12114A Not Req. VC12114A Not Req. IRC PART No. D13-133 A 41 Dll-143 A Dll-143 A Dll-143 A Dll-141 A . 4.7 Meg. 47002 10002 100K2 220K2 1.2 Meg. 4.7 Meg. 4.7 Meg. 47K2 47K2 150K2 47002 68

31、2 682 1002 82002 1 Meg. 3.3 Meg. 3.9 Meg. 3.9 Meg. 4.7 Meg. 4.7 Meg. 3.3 Meg. 3.3 Meg. 3.3 Meg. 3.3 Meg. 1502 iooa 1002 1000B 12002 182 1502 15KB 10K2 100K8 WATTS - 4 1 4 1 1 4 1 4 4 4 4 1 1 4 4 | 2 4 i i i i i i 4 20 , 5 2 1 2 2 1 1 1 MEC PAR HC356 R0310 R0410 RC356 RC339 RC356 RC147 RC318 RC315 RC

32、312 RC482 RC482 RC356 RC356 RC147 RC147 RC347 RC310 RC410 RC332 RC312 RC147 RC147 RC447 RC447 RC315 RC347 RC106 RC106 RC310 RC582 RC310 RC333 RC439 R0439 RC447 RC447 RC433 RC433 RC333- RC333i RX100 RW610 RC51O RC412I RCSOlf RC3151 RC515( RC4101 to connect part of original shaft, (Insulated shaft) to

33、 the new control. (Caution. w _. p-inTa R Be sure that 03 coupler has plenty of clearance between itself and chassis.) , 4 m KJ-U4A and R1U41: ncc|CT/pC * KeDlaces items K104A ITEM No. 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 R37 R38

34、 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60 R61 RATING RESISTANCE 5602 5602 3902 22K2 1002 10K2 33K2 1 Meg. 82K2 68002 22K2 4702 47002 22K2 822 1502 isoa isoa 22K2 82B 1502 2.2 Meg. 1502 822 47K2 IOOKB 15002 82002 1 Meg. 10K2 1 Meg. 33K2 68002 1 Meg. 6800

35、2 220K2 180K2 470K2 4702 IOOKB 47K2 68002 68002 10 Meg. 390K2 6.8 Meg. 470K2 68B 47002 4 7 0 0 2 47002 5602 WATTS 4 4 1 4 4 i 4 4 j f 2 4 4 4 i 4 4 4 4 4 4 i: REPLACEMENT DATA MECK PART No. R035600 RC35600 RC33900 RC12202 RC31000 RC33302 RC31004 RC12202 RC34700 RC34701 RC12202 RC10820 RC31500 RC3150

36、0 RC31500 RC12202 RC10820 RC31500 R032204 RC31500 RC10820 RC34702 RC31003 RC31501 RC38201 RC31004 RC31002 RC31004 RC33302 RC36801 RC31004 RC36801 RC32203 RC31803 RC34703 RC34700 RC31003 RC34702 RC36801 RC36801 RC31005 RC33903 RC36804 RC34703 R010680A RC34701 RC34701 RC34701 RC35600 IRC PART No. BTS-

37、560 BTS-560 BTS-33K BTS-82K2 BTS-2.2 Meg. BTS-47K BTS-100K BTS-1500 BTS-8200 3TS-1 Meg-5S8 BTS-10K BTS-1 Meg-556 BTS-33K BTS-6800 BTS-1 Meg. BTS-6800-5% BTS-220K BTS-180K BTS-470K BTS-470 BTS-100K BTS-47K BTS-6800-S% BT 8-6800-5$ BTS-10 Meg. BTS-390K BTS-6.8 Meg. BTS-470K BW-4-68 BTS-4700 BTS-4700 B

38、TS-4700 BTS-560 IDENTIFICATION CODES All resistors are 10% unless otterwise stated. Grn.-Blue-Br. Ant. Pad. Grn.-Blue-Br. Or .-White-Br. Red-Red-Or. RF Grid Br.-BlK.-Br. RF Cathode Br.-BlK.-Or. RF Plate Or. -Or. -Or. RF Screen Br.-Blk.-Grn. Mixer Grid Gray-Red-Or. Mixer Screen Blue-Gray-Red Osc. Pla

39、te Red-Red-Or. Osc. Grid Yl.-Vi.-Br. Osc. Cathode Yl.-Vl.-Red Mixer Coll Shunt Ped-Red-Or. 1st Video IF Grid Gray-Red-Blk. 1st Video IF Cathode Br.-Grn.-Br. Mixer Plate Decoupling Br . -Grn . -Br . AGC Network Br.-Grn.-Br. 1st Video IF Decoupling Red-Red-Or. 2nd Video IF Grid Gray-Red-Blk. 2nd Video

40、 IF Cathode Br.-Grn.-Br. AGC Network Red-Red-Grn. Br.-Grn.-Br. 2nd video IF Decoupling Gray-Red-Blk. grd Video IF Cathode Yl.-VI.-Or. AGO Diode Load Br.-Blk.-Yl. Voltage Dividler Network Br. -Grn. -Red Gray-Red-Red Video Det. Load Br.-Blk.-Grn. video Amp. Grid 5% Br.-Blk.-Or. Bias Voltage Divider Br

41、.-Blk.-Grn. 5% Or. -Or. -Or. Peaking Coll Shunt Blue-Gray-Red video Amp. Plate Br.-Blk.-Grn. Sync. Sep. Grid Blue-Gray-Red Sync. Sep. Cathode 556 Red-Red-Yl. Sync. Sep. Plate 10% Br.-Gray-Yl. phase Correction Y1.-V1.-Y1. Sound IF Grid Yl.-Vl.-Br. Sound IF Plate Decoupling Br.-Blk.-Yl. Sound IF Scree

42、n Decoupling Yl.-VI.-Or. De-emphasis Blue-Uray-Red Ratio Det. Diode Load 5% Blue-Uray-Red nun n Br.-Blk.-Blue AF Grid Or.-Whlte-Yl. AF Plate Blue-Gray-Grn. Bias Network Y1.-V1.-Y1. Output Grid Blue-Gray-Blk. Output Cathode 10% Yl.-Vl.-Red Filter Yl.-Vl.-Red Integrator Network Yl.-Vl.-Red * Grn.-Blue

43、-Br. Voltage Divider ITEM No. Tl RATING PRI. 117VAC .05A SEC. 1 6.5VAC .6A SEC. 2 Drill one new mount! ITEM No. T2 RATING IMPEDANCE PRI. 25002 SEC. 3. SB DC RES. PRI. 1702 SEC. .52 Tl ITEM No. T3 RATING DC RESISTANCE PRI. 332 SEC. 1 650B SEC. 2 2.52 SEC. 3 02 MEC PART TRF100 ITEM No. SP1 SP2 RATING

44、FIELD RES. PM CONE DIA. 4 3/4 V. C. IMP. 3.32 V. C. DIA. 9/16 ITEM No. LI RATINGS TOTAL DIRECT CURRENT .051A D. C. RESISTANCE 702 IND (0 41 RadioFans.CN ESCRIPTIONS E No. 00 00 .5-01 1015 01 OS SOLAR PART No. STM-60- 005 10.5-31 MO. 5-31 ST-6-01 . STH-60- 005 STM-60- 005 ST-4-02 MW. 5-815 MW.5-21 ST

45、-4-02 ST-6-05 MW.5-25 SPRAGUE PART No. TVM-256 1FM-31 1F11-31 TM-11 TVM-256 TVM-256 TM-12 1FM-335, 1FM-21E 1FM-21 TI1-12 TH-15 1FH-25 IDENTIFICATION CODES AND INSTALLATION NOTES Hor. Osc. Feedback Hor. Discharge Hor. Sweep Coupling II II l! RF Bypass Note 3 Fixed Trimmer HV Osc. Grid Cap. Fixed Trim

46、mer Note 4. HV Filter TN Oxide n ii n n HV Osc. Fll. Bypass Hor. Cent. Cont. Bypass Line Filter .t Ion. at I on . ion . 1C mSf INSTALLATION NOTES i r nt t ttach to R1A Per Instructions ert. Hold Control -j 1 concentric orlz. Hold Control/ ontrast Contrnl rightness. Control Idth Control ttach to R4A

47、Per Instructions eight Control ttach to R5A Per Instructions ert. Linearity Control ttach to R6A Per Instr notions ocus Control ttach to R7A Per Instructions orlz. Centering Control ttach to R8A Per Instructions ert. Centering Control ttach to R9A Per Instructions ick from control sub-panel as far )

48、 that C3 coupler can be employed ift) to the new control. (Caution, letween itself and chassis.) ITEM No. R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R73 R73 R74 R75 R76 R77 R78 R79 R80 R81 R82 R83 R84 R85 R86 R87 R38 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 R101 R102 R103 R104A R105 R106 R107 R

49、108 R109 R110 Rill RATING RESISTANCE 5602 10002 lOOKffl 5.6 Meg. 390KSZ 5.6 Meg. 4.7 Meg. 18K2 150K2 2.2 Meg. 820K2 820K2 5.6 Meg. 5.6 Mfcg. 4.7 Me. 4.7 Meg. 47002 10002 100K2 220K2 1.2 Meg. 4.7 Meg. 4.7 Meg. 47K2 47K2 150K2 47002 682 682 1002 88002 1 Meg. 3.3 Meg. 3.9 Meg. 3.9 Meg. 4.7 Meg. 4.7 Meg. 3.3 Meg. 3.3 Meg. 3.3 Meg. 3.3 Meg. 1502 1002 100ft 1000ft 1200ft 18S2 150ft 15Kft 10KS lOOKft WATTS 1 4 3 X 2 1 1 I i -! i i 1 is i 1 1 i I 2 z i i 1 1 1 1 1 1 i 20 ., 5 5 2 1 2 2 1 1 REPLACEMENT DATA MECK PART No. RC3S600 RC31001 RC4100