Andrea-BT-VK12-Sams-76-5电路原理图.pdf

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1、PHOTO FACT* Folder ANDREA MODELS BT-VK12, CVK-126, COVK-125, T-VK12, TVK-127B,M TUNING CONTROL VOLUME CONTROL ON-OFF-S.W. A.M. TUNING CONTROL FOCUS BRIGHTNESS CONTRAST SELECTOR TONE CONTROL CONTROL CONTROL S.W. CONTROL TRADE NAME Andrea Models BT-VK12 (Sharron), COVK-125 (Ridgeway). CVK-126 (Gramerc

2、y), T-VK12 TVK-127M (Sharron). MANUFACTURER Andrea Radio Corp., 27-01 Bridge Plaza North, Long Island City, New York TYPE SET AM-FM-TV Receiver TUBES Twenty Nine POWER SUPPLY 110-120 Volts AC-60 Cycle TUNING RANGE AM 540-1620KC FM-TV 44 thru 216MC(Continuous Tuning) RATING: 2.4 Amp. 117 Volts AC Ali

3、gnment Instructions Block Diagram Dial Cord Stringing Disassembly Instructions Horizontal Oscillator and Linearity AdJ Parts List and Description Photographs Cabinet-Rear View INDEX 6,7 Photographs (continued) Capacitor Identification 13 Chassis-Top View 20 20 19 Resistor Identification Trans., Indu

4、ctor and Alignment Identification 14,15,16 Schematic Tube Placement Chart 19 Voltage and Resistance Measurements 11,18 3,10 12,17 4,9 2 5 o o n to 01 HOWARD W. SAMS counterwlse po5ltlon. ., SLriu,.;.-;!,.,., .a ;.; s.s: SSf.SSJ B DUMMY ANTENNA Direct Direct Direct Direct SWEEP GENERATOR COUPLING Hig

5、h side to un- grounded tube shield floating over mixer tube VS. Low side to chassis. 11 SWEEP GENERATOR FREQUENCY 24.5M3 (lore Sweep) 0 MARKER GENERATOR FREQUENCY 22 . 95MC 26.2MC 21.7MC 27.7MC 21.7MC t/M IKtn CHANNEL Any CONNECT SCOPE Vert. Amp. to Point Low side to chassis. fr ADJUST 11, A2, 13, A

6、4 A5,A6 A7.A8 A9 REMARKS Adjust for proper response as per Fig 1 with markers as shown. See note d above. Adjust for MINIMUM response at the 21.7MC point shown on response curve (Fig 1). See note e above. Adjust for minimum response at the 27.7MC point shown in Fig 1. See note e above. Adjust for ma

7、ximum amplitude of peak just below 21.7MC point on response curve. If necessary re- touch Al thru A9 for optimum re- sponse as per Fig 1. Use frequency modulated signal with 60% modulation and 450KC sweep. Use 120% sawtooth voltage In scope for horizontal deflection. DUMMY ANTENNA .01MFD .01MFD .01M

8、FD .OMFD SWEEP GENERATOR COUPLING High side to pin 1 (Grid) of 6AU6 (V14). Low side to chassis. High side to pin 1 (Qrld) of 6BA6 (VIS). Low side to chassis. High side to pin 1 (Grid) of 6BA6 (V12) . Low side to chassis. n SWEEP GENERATOR FREQUENCY 21.7MC (450KC Sweep ) ti MARKER GENERATOR FREQUENCY

9、 21.7MC CHANNEL Any RF AND MIXER A CONNECT SCOPE Vert. Amp. to Point Low side to chassis. Vert. Amp. to Point Low side to chassis . ADJUST 410, All A12,A12 A14.A15 A10,A11 REMARKS Disconnect stabilizer capacitor C7. Detune AID clockwise. Adjust All for maximum amplitude and symmetry as per Fig 2. Ad

10、just for maximum amplitude and symmetry as per Fig 2. n Reconnect capacitor C7. Adjust A10 so 21.7MC marker occurs at center of crossover lines as per Fig 3. SLIGHTLY retouch All for maximum amplitude and stralghtness of crossover lines. LIGNMENT The RF and mixer lines of this receiver are pre-set a

11、t the factory and are normally very stable. Alignment should not be attempted unless they are definitely known to be out of alignment. A sweep generator with a maximum output of at least .5 volt Is necessary to properly align the RF and mixer portion of the receiver. Remove the local oscillator tube

12、 VS. Unsolder the blue lead from pin 5 of the mixer tube V2. Connect pins 5 and 6 of V2 together with a short piece of wire. Connect the vertical amplifier of the oscilloscope to pin 6 of the mixer tube. Connect the low side to chassis. DUMMY ANTENNA Direct Direct Direct Direct SWEEP GENERATOR COUPL

13、ING High side to the left hand A ter- minal on antenna terminal strip. Low side to chas- sis. It SWEEP GENERATOR FREQUENCY 57MC (10fC Sweep) 213MC (10MC Sweep) 63MC (10MC Sweep) 69MC (10MC Sweep ) 79tE (10MC Sweep) 85HC (10MC Sweep) 177MC (10MC Sweep) 183MC (10MC Sweep ) 189MC (10MC Sweep) 195MC (10

14、MC Sweep) 201MC (10MC Sweep ) 207MC (10MC Sweep) MARKER GENERATOR FREQUENCY 55.25MC 59.75MC 311.2SMC 215.75MC 61.25MC 65.75fC 67.25MC 71.75MC 77.25MC 81.75MC 83.25MC 87.75MC 175. 25W 179.75M3 181.25MC 185.75MC 187.2SMC 191.75MC 193.25MC 197.75MC 199.25MC 203.75MC 20S.25MC 209.75MC CHANNEL 2 13 3 4 b

15、 6 7 a 9 10 11 12 CONNECT SCOPE See note above n ADJUST A16,A17 418 L5.L9 REMARKS Adjust for response similar to Fig 4 with markers as shown. SLIGHTLY expand or compress L5 AC Voltage measured at 1,000 ohms. 2. Pin numbers are counted in a clockwise direc- tion on bottom of socket. 3. Measured value

16、s are from socket pin to com- mon negative unless otherwise stated. 4. Line voltage maintained at 117 volts for volt- age readings. 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. Radio

17、Fans.CN CHASSIS TOP VIEW RadioFans.CN RadioFans.CN CHASSIS BOTTOM VIEW-CAPACITOR IDENTIFICATION wa/r i- on -VA ri MA-ia ciannui waxnww RadioFans.CN 39VdRadioFans.CN CHASSIS BOTTOM VIEW-RESISTOR IDENTIFICATION I -MA fl MA-IQ C-ia/1/MAI RadioFans.CN o m U R F AMP V1 MIXER V2 O S C V3 B-H- B+ B- 1ST. V

18、IDEO IF V5 2ND. VIDEO IF V6 3RD. VIDEO IF BLOCK DIAGRAM VIDEO AMP V9 VIDEO OUTPUT VI 0 HOR. PHASE DET. V2 0 HOR. AFC V2 1 HOR. OSC 9Z I -MAD L LIA-19 S13QOW V3HQNV RadioFans.CN PARTS LIST AN TUBES (SYLVANIA or Equivalent) CAPACIT ITEM No. VI V2 V3 V4 V5 V6 V7 V8 V9 VI 0 Vll VIE V13 V14 V15 V16 V17 V

19、18 V19 V20 V21 V22 V23 V24 V25 V26 V27 V28 V29A B USE TV-FM RF TV-FM Mixer TV-FM Osc . AM Converter 1st Video IF 2nd Video IF 3rd Video IF Video Det. Video Amp. Video Output DC Restorer- Sync. Sep. 1st FM-TV Sound IF 2nd FM-TV Sound IF-AM IF 3rd FM-TV Sound IF Ratio Det. DET.-AVC-AF Audio Output Syn

20、c. Amp. -Vert Osc. Vert. Amp. Hor. Phase Det. Hor. AFC Hor. Osc. Hor. Dlsch. Hor. Output Damper HV Rectifier LV Rectifier LV Rectifier Picture Tube Picture Tube REPLACEMENT DATA ANDREA PART No. 6J6 6AG5 6J6 6SA7 6AG5 6AOS 6AG5 6AL5 6AU6 6K6GT 6C4 6BA6 6BA6 6AU6 6AL5 6SQ7 6V6GT 6SN7GT 6SN7GT 6AL5 6AC

21、7 6K6GT 6SN7GT 6BG6G 5V4G 1B3GT 5U4G 5U4G 129P4 12LP4 STANDARD REPLACEMENT 6J6 6AG5 6J6 6SA7 SAGS 6AG5 6AG5 6AL5 6AU6 6K6GT 6C4 6BA6 6BA6 6AU6 6AL5 6SQ7 6V6GT 6SN7GT 6SN7GT 6AL5 6AC7 6K6GT 6SN7GT 6BG6G 5V4G 1B3GT 5U4G ; 5U4Q 12LP4 RMA BASE TYPE 7BF 7BD 7BF 8R 7BD 7BD 7BD 6BT 7BK 7S SBG 7BK 7BK 7BK 6

22、BT 8Q 7AC 8BD 8BD 6BT 8N 7S 8BD 5BT 5L 30 5T 5T 1BD NOTES CAPACITORS Capacity values given in the rating column are in mfd. (or Electrolytic and Paper Capacitors, and in mmfd. for Mica and Ceramic Capacitors. ITEM No. CIA B C2A B C3A B C4A B C5A B C6A B 07 C8 C9 CIO Cll C12 CIS 014 015 016 C17 CIS C

23、19 C20 C21 C22 C23 C24 025 C26 C27 C28 C29 030 031 C32 033 C34 035 C36 037 038 039 C40 C41 042 : C43 C44 045 C46 C47 C48 C49 C50 051 052 C53 RATING CAP. 25 40 20 20 25 40 20 10 4 4 20 100 2 1000 SO 100 .05 100 500 500 10 3-13 3-13 1.5-7 10 500 500 3 5.5 1-8 500 500 100 .05 .05 .05 1500 1500 1500 150

24、0 1500 50 1500 4.7 .05 .05 .25 .25 1.0 1500 1500 1500 1500 .05 1500 5000 1500 1500 1500 VOLT 500 500 450 450 350 350 350 25 450 450 450 100 25 25 500 400 500 400 400 400 400 400 400 400 100 400 REPLACEMENT DATA ANDREA PART No. HCE-1321 HCE-1320 HCE-1322 HCE-1323 HCE-1313 HCE-1319 HOE- 1302 HCE-1313

25、HCM-1614A HCC-1910 HCT-1003 HCC-1922 HCC-1912 HCC-1912 HCC-1923 HGV-2115 HCV-2115 HCV-2116 HCC-1923 HCC-1912 HCC-1912 HCC-1921 HOC-1925 HCV-2117 HCC-1912 HCC-1912 HCM-160LA HCT-1003 HCT-1003 HCT-1003 HCC-1914 HCC-1914 HCC-1914 HCC-1914 HCC-1914 HCC-1914 SK-GA-6 HCT-1003 HCT-1003 HCT-1015 HCT-1015 HC

26、T-1027 HCC-1914 HCC-1914 HCC-1914 HCC-1914 HCT-1003 HCC-1914 HCC-1926 HCC-1914 HCC-1914 HCC-1914 AEROVOX PART No. AFH58K AF44J AF88J AF64H AF22J AF4J20C PRS150/4 AF200A 1468-00005 1468-0001 P488-05 1468-0001 1468-0005 1468-0005 1468-0005 1468-0005 1468-0005 1468-0005 1468-0001 P488-05 P488-05 P488-0

27、5 1467-0015 1467-0015 1467-0015 1467-0015 1467-0015 1469-00005 1467-0015 1468-000005 P488-05 P488-05 P488-25 P488-25 484-1.0 1467-0015 1467-0015 1467-0015 1467-0015 P488-05 1467-0015 1467-005 1467-OOA 1467-0015 1467-0015 CORNELL- DUBILIER PART No. UP11BJ 976 UP2250 UP9BJ975 UP20450 UP4BJ241 UP7BJ304

28、 BR215 UP1M-25 5W5Q5 5W5T1 GT4S5 5W5T1 5W5T5 5W5T5 5W5T5 5W5T5 5W5T5 5W5T5 5W5T1 GT485 GT4S5 GT4S5 1W5D15 1W5D15 1W5D15 1W5D15 1W5D15 5R5Q5 1W5D15 5W5V5 GT4S5 GT485 GT4P25 GT4P25 GT2W1 1W5D15 1W5D15 1W5D15 1W5D15 GT4S5 1W5D15 1D5D5 1W5D15 1W5D15 1W5D15 ERIE PART No. GP1K-50 GP1K-100 GP1K-100 GP2K-50

29、0 GP2K-500 N750K-10 TS2A-N300- 3-13 TS2A-N300- 3-13 TS2A-NPO- 1.5-7 N750K-10 GP2K-500 GP2K-500 NPOK-3 N7SOK-5 632-1-8 GP2K-500 GP2K-500 GP1K-100 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-0015 N750L-47 GP2L-0015 NPOK-5 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-0015 811-005 GP2L-0015 GP2L-0015 G

30、P2L-0015 SPRAGUE PART No. EL-220 UT-203 rVA-14 EL-210 rvA-is EL-122 1FM-45 1FM-31 TM-15 1FM-31 1FM-35 1FM-35 1FM-35 1FM-35 1FM-35 1FM-35 1FM-31 TM-15 TM-15 TM-15 1FM-215 1FM-215 1FM-215 1FM-215 1FM-215 MS-45 1FM-215 NS-55 TM-15 TM-15 TO -2 TC-2 TC-10 1FM-215 1FM-215 1FM-215 1FM-215 TM-15 1FM-215 39C

31、1 1FM-215 1FM-215 lFM-215 IDENTIFICATION CODES AND INSTALLATION NOTES Filter A Filter - Filter A Filter - Filter A Filter Filter A Output Cath. Bypass A 1st V. Amp. Dec. Sync. Sep. Plate Dec. Decoupling A Vert. Output Cath. Byp. Stabilizing Cap. Bias Filter Isolation Ant. Coupling RF Bypass RF Grid

32、Filter RF Bypass RF Fll. Bypass RF Coupling Fixed Padder Fixed Trimmer Fixed Padder RF Coupling Mixer Screen Bypass Mixer Fll. Bypass Osc. Coupling Osc. Grid Cap. Fixed Trimmer RF Bypass Osc. Fil. Bypass Osc. Grid Cap. Osc. Anode Bypass AM Conv. Plate Dec. AVC Filter AVC Filter Bias Filter 1st V. IF

33、 Screen Byp. 2nd V. IF Screen Byp. 3rd V. IF Cath. Byp. Fixed Trimmer RF Bypass V. Diode Filter Video Coupling Video Coupling Video Coupling Brightness Cont. Bypass Bias Filter AVC Filter 1st S. IF Screen Bypass 1st S. IF Plate Dec. 2nd S. IF Screen Byp. 2nd S. IF Plate Dec. 2nd S. IK Plate Dec. 2nd

34、 S. IF Fll. Bypass 3rd S. IF Cath. Byp. 3rd S. IF Screen Byp. 3rd S. IF Fll. Byp. ITEM No. 054 C55 056 057 058 059 060 061 062 063 064 065 C66 067 C68 069 070 071 072 073 074 075 076 C77 C78 079 080 081 C82 083 084 085 086 C87 088 089 090 091 C92 093 094 095 RATING CAP. 5000 33 1500 100 100 1000 .1

35、.01 .1 .05 250 .003 1500 .1 .01 5000 5000 5000 5000 .1 .1 60 .015 5000 .05 5000 .015 .05 5000 .05 500 .01 500 .01 1.0 .1 .035 .05 300 500 .1 .05 VOIT 500 500 500 500 200 400 600 400 500 1200 200 600 500 500 1000 1000 600 600 500 400 500 400 500 400 400 500 600 1000 600 1000 600 100 600 1000 1000 200

36、0 10000 600 400 REPLACEMENT ANDREA PART No. HCC-1926 HCC-1928 HCM-1618-1 HCM-1601A HCM-1601A HCM-1610C HCT-1013 HOT-1022 HCT-1002 HCT-1003 HCM-1608AK HCT-1021 HCC-1914 HCT-1013 HCT-1008 HOM-1602A HCM-1602A HCM-1603AK HCM-1603AK HCT-1002 HCT-1002 HCM-1612D HCT-1023 HCM-1602A HCT-1003 HCT-1602A HCT-10

37、23 HCT-1003 HCM-1602A HCT-101S HCM-1609CK HCT-1008 HCM-1617CK HCT-1008 HCT-1027 HCT-1002 HCT-1026 HCT-1025 HCM-1616C2K HCH-2701 HCT-1002 HCT-1003 AEROVOX PART No. 1467-005 1468-00004 1467-0015 1468-0001 1468-0001 1468-001 P288-1 P488-01 P688-1 P48B-05 1468-00025 P1688-003 1467-0015 P288-1 P688-01 14

38、67-005 1467-005 1467-005 1467-005 P688-1 P688-1 P488-015 1467-005 P488-05 1467-005 P488-015 P488-05 1467-005 P688-05 1468-001 P688-01 1468-0005 P688-01 484-1.0 P688-1 P1088-033 P1088-05 P688-1 P488-05 CORh DUBI PART 1D5DS 5W50/ 1W5D 5W5T 5W5T 1W5D GT2P GT4S GT4P GT4S! 5W5TC GT16I 1W5D GT2P: GT6S: 1D

39、5D! 1D5DS 1D5D! 1D5D1 GT6P GT6P GT6S: 1D5D1 GT4S, 1D5D. GT6S: GT4S1 lD5Di GT6S! 5W5T! GT6S 5W5T! GT6S GT2W GT6P. GT16! GT6P GT4S. Some models use 150MMF in this applies COI ITEM No. Rl R2 R3A B R4A B C R5 R6 R7 R8 R9 RIO Rll R12 R13 RATING RESIST- ANCE 10K2 20KB 10K2 Shaft 500KS! Shaft Switch 500KS2

40、 250K2 202 2 Meg. 80002 2 Meg. 4oa 50K2 SOK2 WATTS 4 4 4 4 4 2 4 2 4 2 4 4 REPLACEMENT DATA ANDREA PART No. GHV-806-1 GRV-817-1 GRV-818-1 Not Req. GRV-812-6 Not Req. Not Req. GRV-825 GRV-822 GRV-810-1 GRV-812-1 GRV-824 GRV-812-1 GRV-823 GRV-807-1 GRV-807-1 IRC PART No. Q14-116 Not Req. Q13-133X Not

41、Req. 76-1 Ql 1-130 W-20X10 Qll-139 W-2000 Ql 1-139 W-40 Hll-123 yll-123 OAR PAR 10-H 10-2 AM-3) 9 Henries 7 Henries 5 Henries REPLACEMENT DATA ANDREA PART No. ST-3021 ST-3016 ST-3017 STANCOR PART No. C-1215T C-1709 C-2325 MERIT PART No. C-2976 t C-2993 T C-2991 t CHICAGO PART No. R-1230T R-885 T TR-

42、4200 INSTALLATION NOTES T Drill one new mounting hole. COILS (RF-IF) ITEM No. L4 L5 L6 L7 L8 L9 L10 Lll L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26 L27 L28 L29 L30 LSI L32 L33 L34 L35 L36 L37 L38 USE Ant. Coll RF End Inductor RF End Inductor RF Plate Band Pass Mixer End Inductor Mixe

43、r End Inductor Mixer Grid Osc. End Inductor Osc. Coll Osc. Shunt RF Choke 1st Video IF and Sound Take- off 2nd Video IF 3rd Video IF 4th Video IF 5th Video IF Peaking Peaking Peaking Peaking Peaking Peaking 1st Sound IF 2nd Sound IF Ratio Det. Trans . AM RF Coll AM Osc. 1st AM IF 2nd AM IF Width Con

44、- trol Hor. Line- arity Fll. Choke FI1. Choke Fll. Choke DC RES. PRI. .12 02 02 02 12 02 02 02 02 Off, 02 12 .52 .52 .52 .52 .52 8.22 7.52 8.22 8.22 8.22 6.52 .22 .22 .22 352 12 1 9 . 5 2 18.52 .22 442 .32 .32 .32 SEC. .12 .22 .22 .22 82 5.52 1 9 . 5 2 18.52 REPLACEMENT DATA ANDREA PART No. SA-278 S

45、A-319 SA-321 SA-137 SA-284 SA-320 SA-318 SA-316 SA-283 SA-289-1 SA-290-1 SA-291-1 SA-287 SA-292-1 SA-284 SA-285 SA-284 SA-284 SA-284 SA-286 SA-312 SA-313 SA-311 SA-297-1 SA-298-1 SA-309-A SA-310-D SA-314 SA-315 SA-280 SA-280 SA-280 MEISSNER PART No. 14-1060 16-6658 16-6660 NOTES Part of tuner. Part

46、of tuner. Part of tuner. Part of inductuner. Part of tuner. Part of tuner. Part of tuner. Part of inductuner. Part of tuner. Part of Inductuner. Part of tuner . DIAL LIGHTS ITEM No. Ml M2 KB BASE TYPE Bayonet Bayonet Bayonet VOLTS 6-8 6-8 6-8 AMPS. .25 .25 .25 BEAD COLOR Blue Blue Blue REPLACEMENT D

47、ATA ANDREA PART No. NOTES Type 144 Type |44 Type #44 MISCELLANEOUS ITEM No. M4 MS M6 M7 PART NAME RF Tuner Ion Trap Band Switch Tuning Cap ANDREA PART No. FM-5113 FM-5129 FM-5111 HCV-2112 NOTES Inductuner only. PM-used on 12LP4 only. Includes wafer and two snap switches. (14-427MPF, 14-427MMF) WO/T

48、PAGE 16 RadioFans.CN HOR. FREQ. HOR. LI N. HOR, WIDTH HOR. DRIVE CONTROL PICTURE TUBE SCREEN VERT. VERT. VERT, HEIGHT CENT. HOLD LIN. CO NT. HOR. CENT. HOR. HOLD CONTROL CABINET-REAR VIEW HORIZONTAL OSCILLATOR ADJUSTMENTS Turn the set on and tune In a TV station, preferably a test pattern. Turn the

49、vertical hold control to sync the picture vertically. Set the contrast control to slightly less than normal. The picture should be very thin and wash- ed out. Set the horizontal hold control to the mid position of Its range. Adjust the horizontal frequency slug (Bl) to the center of the range over which the picture syncs horizontally. If the picture shows a blanking bar or shows ripples In the picture adjust the horizontal phase slug (02) until bar moves off of the screen, or until unstable condition disappears. HORIZONTAL LINEARITY ADJUSTMENTS These adjustments sh