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Zenith 28T925, Manual

The Zenith 28T925 is a top-of-the-line television set with cutting-edge features. Discover all the functionalities and settings with the comprehensive user manual, available for free download from manualshive.com. Unlock the full potential of your TV and enhance your viewing experience with the easy-to-follow instructions provided in the manual.

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Summary of Contents for 28T925

Page 1: ...or 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 CO INC Indianapolis 7 Indiana The...

Page 2: ...1 B7 ra ib rh A PHOTOFACT STANDARD NOTATION SCHEMATIC Howard W Soms Co Inc 1949 PAGE 2...

Page 3: ...THE COOPERATION OF THE MANUFACTURER OF THIS RECEIVER MAKES IT POSSIBLE TO BRING YOU THIS SERVICE...

Page 4: ......

Page 5: ...ANTENNA ADJ CHASSIS TOP VIEW C9618Z Z96L9Z 196JL8S O9618S S13QOW H1IN3Z...

Page 6: ...CHASSIS BOTTOM VIEW TRANS INDUC PAGE 4...

Page 7: ...JCTOR AND ALIGNMENT IDENTIFICATION PAGE 9...

Page 8: ...IVO AOA wonoa SISSVHO 9 39Vd...

Page 9: ...CAPACITOR IDENTIFICATION PAGE 5...

Page 10: ...25 SMC marker as per Fig Z Adjust for pattern and placement of 22 2MC marker as per Fig 3 The 25 IMC should fall approximately as shown in Fig 3 Use maximum marker amplitude and adjust trap AS so 27 S...

Page 11: ...et fine tuning control as above and adjust slug A25 for zero reading Pre set fine tuning control as above and adjust A26 thru A29at their respective channels ANTENNA ALIGNMENT Remove the AGO tube V8 a...

Page 12: ...IDEO IF V4k 2ND VIDEO IF V5 3RD VIDEO IF V6 AGC V26 V27 1ST AGC AMR 2V8 fc 2ND AGC AMP V2V9H B VIDEO DET 1 2 V7 H 1ST VIDEO AMR l VyH 1ST SYNC CUPPER 2V8 SYNC AMP VI6 1 SYNC CLIPPER VI fc SYNC SEP V9...

Page 13: ...CHASSIS BOTTOM VIEW RE PAGE 18...

Page 14: ...Ril3 R7i R 2 R73 R118 RESISTOR IDENTIFICATION PAGE...

Page 15: ...C M V RECT lB3GTJ O A M P E R V 2 4 L_ cp UBGT X N V_y T WV6GTJVERT OUTPUT AMB VERT osc v 23 HOR O M W n n n i PICTURE TUBE v_y v_y v_y yioV_iii 1 SYN SEFX SLT 1 x X l X SSHTJ CLIPPER 1 feAT tXu lsYNC...

Page 16: ...V 7 V 8 V 9 V 10 V 1 1 V 12 V 1 3 V 1 4 V 15 V 16 V 1 7 V 1 8 V 19 V20 V 2 1 V 2 2 V 2 3 V 2 4 V 2 5 V26 V27 V28B Tube 6AG5 6A05 6J6 6A1I6 6AII6 BAHfi 12AT7 124T7 6ST 7fiT 6AH7 6A1IK fiallfi 6A1I6 BT...

Page 17: ...4 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...

Page 18: ...FM 31E 1FM 35 TM 25 TM 15 TM 15 TM 25 TM S5 TM 15 LFM 315 TM 11 MS 37 TR 21 TM 15 TM 1 TM 1 M3 43 TM 25 TM 15 AGO Filter Video Coupling Brightness Cont Byp Pic Tube Cath Bypass 1st S Decoupling 2nd S...

Page 19: ...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 63 187...

Page 20: ...1110 95 1111 STANCOR PART No A 8121 A 8115 0 DY 1 FC 10 CHICAGO PART No TBO 1 TVO 1 0 MERIT PART No A 4000 A 3035 0 NOTES Horlz Osc AFO Trans Vert Block Osc Trans Hor Output Trans Vert Output Trans Ho...

Page 21: ...5 8 1 5 1 2 7 8 1 5 1 2 8 95 1121 95 1118 95 1119 95 1120 S 15042 20 255 MEISSNER PART No NOTES to oo o DIAL LIGHTS ITEM No m M2 BASE TYPE Bayonet Bayonet VOLTS 6 8V 6 8V AMPS 0 25A 0 25A BEAD COLOR B...

Page 22: ...POWER SUPPLY CHASSIS TOP VIEW 4 POWER SUPPLY CHASSIS BOTTOM VIEW PAGE 19...

Page 23: ...noted at this point AGC ADJUSTMENT The performance of the AGC circuit Is checked and adjusted by applying a known voltage to the video detector test Jack S and noting the corresponding voltage at the...

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