Zenith-8T925-Sams-64-15电路原理图.pdf

PHOTO FACT* Folder ZENITH MODELS 28T925, 28T96O, 28T961, 28T962, 28T963 VERT. CENT. CHANNEL SELECTOR FINE TUNING VERT. HOLD FOCUS HORIZ. CENT. DIAL LIGHT 5W, HORiZ. DRIVE CONTRAST CONTROL VOL. CONT. ON-OFF SW, BRIGHTNESS HORIZ. PHASE HORIZ. HOLD VERT. LIN, HEIGHT WIDTH ZENITH MODEL 28T960 .TRADE NAME Zenith, Models 28T925, 28T960, 28T961, 28T962, 28T963. Chassis 28F20, 28F20Z, 28F21, 28F22. MANUFACTURER Zenith Radio Corp., 6001 Dickens Ave., Chicago, Illinois TYPE SET Television Receiver TUBES Twenty-eight POWER SUPPLY 117 Volts, 60 Cycle AC TUNING RANGE Channels 2 through 13 RATING 3.11 Amps 117 Volts AGO Adjustment Alignment Instructions Block Diagram Horizontal Frequency Adjustment Horizontal Phase Adjustment Parts List and Description Photographs Capacitor Identification Chassis-Top View INDEX 20 Photographs (continued) 6,7 10 20 20 14,15,16,17 5,8 Power Supply Chassis RF Tuner Resistor Identification Trans., Inductor and Alignment Identification Schematic Tube Placement Chart Voltage and Resistance Measurements 19 10 11,18 4,9 2 12 13 HOWARD W. SAMS A PHOTOFACT STANDARD NOTATION SCHEMATIC Howard W. Soms Low s ide to chassis. liEh side to pin 1 (Grid) of 6AUS (Vli; Low side to chassis. Ilgh side to an ungrounded tube shield placed over the mixer tube (V3). Low side to chassis . SWEEP GENERATOR FREQUENCY 24MC (IMC Sweep) n MARKER GENERATOR FREQUENCY 21. SMC CHANNEL Any CONNECT SCOPE Vert, AC Voltage measured at 1,000 ohms. 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 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. C9618C S9618Z L9618Z O9618S SZ618Z S13QOW H1IN3Z RadioFans.CN TUBES (SYLVANIA or Equivalent) PARTS LIST ITEM No. VI V2 V3 V4 VE ve V7 V8 V9 VI VI VI v: 0 1 2 3 V14 VI V VI 5 6 7 V18 V19 V2 V2 V2 0 1 2 V23 V2 V2 V2 V2 4 5 6 7 V28A B C D RF Ml USE Amp. xer Oscillator Is 2n 3r t Vide 1 Vide 1 Vide o IF o IF 0 IF Video Det.-lst VIieo AmD . 1st AGO Amp.- 1s pe ; Sync p 2nd AGC .Clip- Ajnp . Sync . Sep. 2n Is 2n LI 1 Vide t Soun i Soun niter Disc.-AF Au Syi 2n pe 31o 0 ic. Am 1 Sync r Vert.Osc Dlsen. o Amp . d IF d IF Amp. utput P. . Cllp- . -Horlz Vert. Output Ho Ho Co Ho riz. S -lz. A itrol lz. 0 ync. Disc. FC sc. Horlz. Output Dar HV LV LV nper Rect. Rect. Rect. Picture Tube PI PI ;ture ;ture Tube Tube Picture Tube REPLACEMENT DATA ZENITH PART No. 6AG5 6A35 6J6 6A 6A 6A ia 12 as U6 H6 4T7 AT7 6SL7GT 6A 6A 6A 6A 07 J6 J6 J6 6T8 6V 6A 6S 6S SGT J6 H7 M7GT 6V6GT 6A 6A 6K L5 n 3GT 6BG6G 5V IB, 5U SU 1G SGT 10 1G 12LP4 121 1015P43P4 10FP4 STANDARD REPLACEMENT 6AG5 6AG5 6J6 6AU6 6AU6 6AH6 12AT7 12AT7 6SL7GT 6AC7 6AU6 6AU6 6AU6 6T8 6V6GT 6AU6 6SH7 6SN7GT 6V6GT 6AL5 6AC7 6K6GT 6BG6G 5V4G 1B3GT 5U4G 5U4G 12LP4 12KP4 10BP4 10FP4 RMA BASE TYPE 7BD 7BD 7BF 7BK 7BK 8BD 8N 7BK 7BK 7BK 7AC 7BK 8BK 8BD 7AC 6BT 8N 7S 5BT 5L 3C 5T 5T NOTES Used on 28F20 and 28F20Z Chassis n it Used or n n 28F21 II il N md 28F22 Chassis n n n 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 flQ RATING CAP. 15 AfT 200 REPLACEMENT DATA ZENITH PART No. 22-1826 AEROVOX PART No. AF3G CORNELL- DUBILIER PART No. UP2025 urn T I T ERIE PART No. SOLAR PART No. SPRAGUE PART No. TVL-70 IDENTIFICATION CODES AND INSTALLATION NOTES Filter ITEM No. C41 042 043 044 045 046 C47 C48 049 050 051 052 053 054 055 056 057 C58 059 060 061 062 063 064 C65 066 067 068 069 C70 071 072 C73 C74 C75 C76 C77 078 079 C80 081 082 083 084 085 086 087 CSS 089 090 091 092 RATING CAP. .01 .1 .01 .047 .1 .033 .0012 .0012 .0047 25 .005 500 3 .0047 .001 .022 .0047 .047 .047 47 .1 250 .022 .01 .005 .005 .005 .01 .047 .1 .0022 150 470 .015 .0047 .047 .047 .0047 .015 .0047 .047 150 .01 680 .001 .047 .1 .1 500 30 .0047 .047 VOLT 400 200 400 400 600 600 600 600 400 400 600 600 600 600 500 600 500 600 600 200 200 200 600 600 600 600 500 500 200 400 200 400 600 200 400 600 500 400 500 1000 600 600 600 2000C 600 600 REPLA ZENITH PART No. 27-1809 22-1777 22-1809 22-1775 22-1841 22-1901 22-1880 22-1880 22-1847 22-1887 22-1706 22-1703 22-1693 22-1811 22-1886 22-1813 22-1782 22-1844 22-1844 22-1674 22-1841 22-182 22-1845 22-1779 22-1842 22-1842 22-1842 22-1843 22-1844 22-1841 22-1845 22-1137 22-1138 22-1850 22-1847 22-1778 22-1775 22-1849 22-1850 22-1847 22-1844 22-1137 22-1846 22-1833 22-1851 22-1844 22-1841 22-1841 22-1832 22-1871 22-1782 . 22-1844 AEROVOX PART No. P4S8-0 P288-1 P488-01 P488-047 P688-1 P688-033 P688-001 P688-001 P688-0047 1468-000025 1467-005 1468-0005 P488-0047 1468-001 P688-022 P688-0047 P688-047 P688-047 1468-00005 P688-1 1468-00025 P688-022 P688-01 P688-005 P688-005 P688-005 P688-01 P688-047 P688-1 P688-0022 1468-00015 1468-0005 P288-015 P488-0047 P288-047 P488-047 P688-0047 P288-015 P488-0047 P688-047 1468-00015 P488-01 1479-0007 P1088-001 P688-047 P688-1 P688-1 P683-U047 P688-047 COR DUB PAR1 GT4 GT2 GT4 GT4 GT6 GT6 GT6 GT6 GT6 5W5 1D5 5W5 GT6 1W5 GT6 GT6 GT6 GT6 5W5 GT6 5W5 GT6! GT6i GT6J GT61 GT61 GT6! GT6S GT6 GT61 5W5. 5W5 GT6I GT6 GT2! GT4i GT61 GT6! GT41 GT6S 5W5 GT4! 2R5 GTK GT6i GT61 GT6 5R5 GT61 GT6i ITEM No. Cl C2 03A B C4A B C C5 C6A B C C7A B C 08 C9 CIO Oil C12 CIS C14 CIS C16 C17 CIS C19 C20 021 C22 C23 024 C25 026 C27 C28 C29A B 030 031A B 032 C33A B C34A B 035 036 037 CSS 039 040 RATING CAP. 15 40 20 100 20 20 40 40 40 20 10 100 10 40 20 500 20 200 200 .001 200 .001 200 .001 200 200 200 1.2 10 47 46 100 100 52 6 .001E .001E 200 .001E .001E 200 .001E .001E .001E .001E 7.5 .047 .001 .001 470 .001 VOLT 200 400 475 300 475 300 25 450 350 300 200 200 200 50 25 3 25 REPLACEMENT DATA ZENITH PART No. 22-1826 22-1827 22-1828 22-1836 22-1573 22-1837 22-1838 22-1903 22-1904 22-1903 22-1668 22-1668 22-1888 22-1668 22-1888 22-1668 22-1888 22-1668 22-1668 22-1668 22-1765 22-1895 22-1876 22-1947 22-1947 22-1870 1 22-1869 400 500 105-17 22-1668 105-17 22-1668 105-17 105-17 22-1898 22-1775 27-108 22-1888 22-1138 400 122-1839 AEROVOX PART No. AF3G AF8J AF4K20G AFH14K4G8A AF8J AF862J4A* AFH202E8B PRS25/25 PRS6/500 PRS25/25 1468-0001 1469-00005 1467-0015 1467-0015 1468-0002 1467-0015 1467-0015 1468-0002 1467-0015 1467-0015 1467-0015 1467-0015 P488-047 1468-0001 1468-0005 P688-001 CORNELL- DUBILIER PART No. UP2025 UP1111 45t UP9BJ 1016 UP7CJ 1014 UP4045 UP70J 971 UP70J 1054 BR202A BRH605 BR202A 5W5T1 5R5Q5 1W5D15 1W5D15 5W5T2 1W5D15 1W5D15 5W5T2 1W5D15 1W5D15 1W5D15 1W5D15 GT4S5 1W5D1 5W5T5 GT6D1 ERIE PART No. GP2K-200 GP2K-200 GP2L-001 GP2K-200 GP2L-001 GP2K-200 GP2L-001 GP2K-200 GP2K-200 GP2K-200 NPOK-10 GP1K-50 GP1K-100 GP1K-100 GP2L-0015 GP2L-0015 GP2K-200 GP2L-0015 GP2L-0015 GP2K-200 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-0015 GP2L-001 GP2K-500 GP2L-001 SOLAR PART No. MO. 5-31 MOS .5-45 MW. 5-215 MW. 5-215 MO. 5-32 MW. 5-215 MW.5-215 MO. 5-32 m. 5-215 MW.5-215 MW.5-215 MW.5-215 ST-4-05 MW.5-21 MO. 5-35 ST-4-001 SPRAGUE PART No. TVL-70 TVL-8 TVL-19 TVL-31 TVL-7 TVL-23 TVL-21 TVA-6 UHO- 506 TVA-6 1FM-31 MS-45 1FM-21E 1FM-215 1FM-32 1FM-215 1FM-215 FM-32 1FM-215 1FM-215 1FM-215 FM-215 FM-15 1FM-21 1FM-35 PM-21 IDENTIFICATION CODES AND INSTALLATION NOTES Filter - Filter A. Decoupling B S A Output Oath. Bypass Filter - Filter Hor. Output Cath. Byp. * Decoupling Low Pass Filter 2nd V. Amp. Screen Byf Vert. Output Cath. Byp. Vert. Cent. Bypass Hor. Cent. Bypass Bias Filter AGC Filter Fixed Padder SF Cath. Bypass fF Screen Bypass RF Fll. Bypass RF Decoupling W Bypass Fixed Padder Mixer Cath. Bypass lixer Screen Bypass Osc. Coupling Osc. Grid Cap. n n II Fixed Trimmer *2.5% Osc. Fll. Bypass IF Coupling Fixed Trimmer * 5% Fixed Trimmer 1st V. IF Screen Bypass 1st V. IF Plate Dec. IF Coupling AGC Filter 2nd V. IF Screen Bypass IF Coupling 3rd V. IF Cath. Bypass 3rd V. IF Screen Bypass RF Bypass 3rd V. IF Plate Dec. Diode Filter *1056 Video Coupling Fixed Trimmer V. Det. Dll-114 E t Dll-128 E Dll-123 E t File shaft to duplicate original. ITEM No. R12 R13 R14 R15 R16 R17 RIB R19 R20 R21 R22 R23 R24 R25 PR26 R27 R28 R29 R30 RATING RESISTANCE 1 Meg. 472 22K2 10002 2.2 Meg. 8202 6SOK2 10002 47002 47002 15002 47K2 102 33002 822 2202 4702 10002 62002 WATTS A i I x 9 X 1 1 i i I I * 4 i REPLACEMENT DATA ZENITH PART No. 63-1912 63-1729 63-1841 63-1785 63-1926 63-1782 63-1905 63-1785 63-943 63-943 63-1792 63-1855 63-1701 63-1806 63-1740 63-1758 63-1772 63-1786 63-1818 IRC PART BTS-1 r BTS-22K BTS-100 BTS-820 BTS-100 BTA-470 BTA-470 BTS-150 BTS-47K BTS-330 BTS-470 BTS-100 PAGE 14 RadioFans.CN PARTS LIST AND DESCRIPTIONS ITEM No. ZENITH PART No. REPLACEMENT DATA AEROVOX PART No. CORNELL- DUBILIER PART No. ERIE PART No.PART No. IDENTIFICATION CODES AND INSTALLATION NOTES ITEM No. RATING RESISTANCE! WATT 3F20 and 28F20Z Chassis 3F21 and 28F22 Chassis r Electrolytic Capacitors. 1AGUE iTNo. L-70 L-31 L-23 A-6 C- 506 A-6 Filter -32 -215 -215 -32 -215 -215 -21 35 IDENTIFICATION CODES AND INSTALLATION NOTES Output Cath. Bypass Filter Filter Hor. Output Cath. Byp Decoupling Low Pass Filter 2nd V. Amp. Screen Byp Vert. Output Catn. Byp. Vert. Cent. Bypass Hor. Cent. Bypass Bias Filter AGC Filter ) ) 5 3 3 D -01 SOLAR PART No. ST-4-01 ST-2-1 ST-4-01 ST-4-05 ST-6-1 ST-6-03 ST-6-001 ST-6-001 ST-6-005 MO. 5-425 MW.5-25 MO. 5-35 ST-6-005 MW.5-21 ST-6-02 ST-6-005 ST-S-05 ST-6-05 MO. 5-45 ST-6-1 MO. 5-325 ST-6-02 ST-6-01 ST-6-005 ST-6-005 ST-6-005 ST-6-01 ST-6-05 ST-6-1 ST-6-002 MO. 5-315 KO.5-35 ST-6-005 ST-4-05 ST-4-05 ST-6-005 ST-6-005 ST-6-05 MO. 5-315 ST-4-01 MWS.5-37 STM-16- 001 ST-6-05 ST-6-1 ST-6-1 MOS .5-43 ST-6-005 ST-6-05 SPRAGUE PART No. TM-11 ffl-1 rM-ii TM-15 FM-1 TM-13 TM-21 TM-21 TM-25 M3-425 1FM-25 1FM-35 TM-25 LFM-21 TM-12 TM-25 rn-is ra-15 LFM-45 PM-1 1FM-325 TM-12 TM-11 TM-25 TM-25 TM-25 TM-11 TM-15 TM-1 TM-22 1FM-31E 1FM-35 TM-25 TM-15 TM-15 TM-25 TM-25 TM-15 LFM-315 TM-11 M3-37 TR-21 TM-15 TM-1 TM-1 M3-43 TM-25 TM-15 IDENTIFICATION CODES AND INSTALLATION NOTES AGC Filter n it n ii Video Coupling Brightness Cont. Byp. Pic. Tube Oath. Bypass 1st S. Decoupling 2nd S. Decoupling 2nd S. Fll. Bypass Llmlter Grid Filter jimiter Decoupling 3e -emphasis Fixed Trimmer 5% Audio Coupling AF Plate Bypass Audio Coupling Output Plate Bypass Video Coupling Sync. Coupling RF Bypass Sync. Amp. Plate Dec. Sync. Coupling Sync. Coupling Sync. Coupling integrator Net. n ii n ii Vert. Osc. Grid Cap. Vert. Discharge Vert. Coupling Differentiator Net. Hor. Sync. Coupling Fixed Trimmer Hor. Sync. Coupling AFC Filter or. AFC Screen Byp. AFC Coupling Phase Shifter Hor. Osc. Grid Cap. -lor. Osc. Screen Bypass Differentiator Net. Hor. Discharge 5% Hor. Coupling rlor. Output Screen Byp. Damper Filter ii n HV Filter Fixed Trimmer 10% Line Filter Fixed Trimmer 4- INSTALLATION NOTES ert. Hold Control ttach to R1A Per Instructions ocus Control ert. Centering Control Tapped C orlz. Centering Control eight Control ttach to R5A Per Instructions orlz. Drive Control ttach to R6A Per Instructions ert. Linearity Control ttach to R7A Per Instructions Tightness Control ttach to R8A Per Instructions oriz. Hold Control ttach to R9A Per Instructions olume Control and Switch Dntrast Control ensltivity Control * 102 IDENTIFICATION CODES islstors are t 10% unless otherwise stated. :d 20% ;hode -een Decoupling ;oupling Grid 20% Cathode Screen Dropping 30% Plate late Irld .tic Suppressor ,deo IF Grid .deo IF Cathode ,deo IF Screen Decoupling 2C% ,deo IF Plate Decoupling 2o% itwork 20% deo IF Grid 5% ITEM No. R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 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 R103 R104 R105 R106 R107 R108 R109 R110 Rill BUS R113 R114 RUB R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 RATING RESISTANCE 1 WATTS 822 2202 47002 4702 1502 33K2 4702 39K2 27KB 3900B 2.2 Meg. 2.2 Meg. 10002 4702 330KB 22002 180K2 1.5 Meg. 68KB 100K2 100KB 47KB 8202 12K2 33KB 1 Meg. 82002 18KB 39K2 62002 82K2 33K2 120K2 10KS2 68B 68002 6800B 682 100KB 1 Meg. 47K2 150K2 150K2 10K2 15 Meg. 22K2 100K2 220K2 330KB 2202 2.2 Meg. 2.2 Meg. 33002 33KB 18K2 2.2 Meg. 2.2 Meg. 10KB 10K2 1 Meg. 12K2 1 Meg. 2.2 Meg. 10K2 82002 82002 82002 82002 1 Meg. 220K2 82002 4.7 Meg. 15002 33K2 10KB 27002 470K2 470K2 470K2 5602 68002 102 20K2 39K2 27KB 30K2 25002 22K2 10K2 5K2 16KB 30K2 220K2 560K2 82002 1502 470K2 1502 10K2 5K2 4.72 OOOB 470K2 6202 102 4 4 4 4 4 l 4 4 4 4 4 2 2 Z 4 jj 1 1 1 4 4 4 i I 4 1 4 4 i- J 4 4 4 4 1 4 4 2 X I 4 4 2 4 4 2 5 4 1 3 4 3 4 4 i i 2 2 20 1 10 1 10 5 REPLACEMENT DATA ZENITH PART No. 63-1740 63-1758 63-1816 63-1772 63-1751 63-1848 63-1772 63-1852 63-1845 63-1809 63-1926 63-1926 63-1786 63-1890 63-1919 63-1870 63-1870 63-1856 63-1781 63-1831 63-1849 63-1918 63-1824 63-1827 63-1852 63-1579 63-1866 63-1849 63-1873 63-1684 63-1737 63-1571 63-1571 63-1737 63-1870 63-1912 63-1194 63-1876 63-1876 63-1828 63-1961 63-1842 63-1869 63-1883 63-1890 63-1227 63-1926 63-1926 63-1807 63-1849 63-1827 63-1926 63-1926 63-1827 63-1827 63-1912 63-1831 63-1912 63-1926 63-1827 63-1824 63-1824 63-1824 63-1824 63-1912 63-1884 63-1824 63-1940 63-1967 63-1848 63-1827 63-1169 63-1896 63-1896 63-1896 63-1775 63-1701 63-1566 63-1852 63-1845 63-947 63-1532 63-1842 63-1071 63-1533 63-1533 63-1824 63-1751 63-1898 63-1578 63-1198 63-1679 63-1581 3-2011 63-1898 63-1685 63-1996 IRC PART No. BTS-4700-5% BTS-470 BTS-33K BTS-470 BTS-39K BTS-27K BTS-3900-5% BTS-2.2 Meg BTS-2.2 Meg BTS-1000 BTA-470 BTA-330K BTS-2200-5% BTS-180K BTS-1. 5 Meg BTS-68K BTS-100K BTS-100K BTS-47K BTS-820K-5% BTS-12K BTS-33K BTS-1 Meg. BTS-8200 BTS-18K BTS-39K BTS-82K BTS-33K BTS-120K AB-10K BT-2-6800 BT-2-6800 BTS-100K BTS-1 Meg. BTA-47K BTA-150K-5% BTA=150K-5% BTS-10K BTS-15 Meg. BTS-22K BTS-100K BTS-220K BTS-330K BW-1-220 BTS-2.2 Meg. BTB-2.2 Meg. BTS-3300 BTS-33K BTS-18K BTS-2.2 Meg. BTS-2.2 Meg. BTS-10K BTS-10K BTS-1 Meg. BTS-12K BTS-1 Meg. BTS-2.2 Meg. BTS-10K BTS-8200 BTS-8200 BTS-8200 BTS-8200 BTS-1 Meg-5% BTS-220K BTS-8200 BTS-4.7 Meg. BTA-1500 BTS-33K BTS-10K BT-2-2700 BTS-470K BTS-470K BTS-470K BTS-560 BTS-6800 BTS-39K BTS-27K BT-2-27K AB-2500 BTS-22K BTA-10K AB-5000 BTS-18K BT-2-27K BTS-220K BTS-560K-5% BTS-8200 BTS-470K W-2-150 T-2-10K DG-15K W-l-4.7 B-3000 AB-600 AB-10 IDENTIFICATION CODES ALL RESISTOR ARE 1 10% UNLESS OTHERWISE STAGED 2nd Video IF Cathode 2nd Vlaeo IF Screen Decoupling 20% 2nd Video IF Plate 5% 2nd Video IF Plate Decoupling go% 3rd Video IF Cathode 20% 3rd Video IF Screen Dropping 3rd Video IF Plate Decoupling 20% Peaking Coll Shunt AGC Allp . Grid Video Det. Load R PAGE 15 RadioFans.CN PARTS LIST AND DESCRIPTIONS (Continued) TRANSFORMER (POWER) ITEM No. T1A RATING PRI.