samsung ct501ebz free download

File name CT331E~1.PDF

COLOR TELEVISION RECEIVER Chassis : Model: K15A CT331HBZX CT331EBZX CT331HBX CT331HX CT3366BZX CT3338ZX CT501EBZX CT501HX CT5066BZX CT5038ZX COLOR TELEVISION RECEIVER CONTENTS 1. Precautions 2. Specifications 3. Disassembly and Reassembly 4. Alignment and Adjustments 5. Troubleshooting 6. Exploded Views and Parts List 7. Electric Parts List 8. Block Diagram 9. PCB Layout 10. Wiring Diagrams 11. Schematic Diagrams ELECTRONICS © Samsung Electronics Co., Ltd. JUN. 1998 Printed in Korea 3K15A-0101

File name CT331E~2.PDF

Precautions 1. Precautions Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays. 1-1 Safety Precautions 1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields. 2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers. 3. Make sure that there are no cabinet openings through which peopleСparticularly childrenСmight insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and improperly fitted back covers. If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an abnormality exists that must be corrected before the unit is returned to the customer. 4. Leakage Current Hot Check (Figure 1-1): Warning: Do not use an isolation transformer during this test. Use a leakagecurrent tester or a metering system that complies with American National Standards Institute (ANIS C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7). 5. With the unit completely reassembled, plug the AC line cord directly into the power outlet. With the unitХs AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: antennas, handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the powerplug prongs in the AC outlet and repeat the test. DEVICE UNDER TEST TEST ALL EXPOSED METAL SURFACES 2-WIRE CORD ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED) LEAKAGE CURRENT TESTER (READING SHOULD NOT BE ABOVE 0.5mA) EARTH GROUND Fig. 1-1 AC Leakage Test 6. Antenna Cold Check: With the unitХs AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. Connect one lead of the ohmmeter to an AC prong. Connect the other lead to the coaxial connector. 7. X-ray Limits: The picture tube is especially designed to prohibit X-ray emissions. To ensure continued X-ray protection, replace the picture tube only with one that is the same type as the original. Carefully reinstall the picture tube shields and mounting hardware; these also provide X-ray protection. 8. High Voltage Limits: High voltage must be measured each time servicing is done on the B+, horizontal deflection or high voltage circuits. Correct operation of the X-ray protection circuits must be reconfirmed whenever they are serviced. (X-ray protection circuits also may be called Тhorizontal disableУ or Тhold-downУ.) Heed the high voltage limits. These include the XРray Protection Specifications Label, and the Product Safety and X-ray Warning Note on the service data schematic. Samsung E

File name CT331E~3.PDF

Specifications 2. Specifications 2-1 Specifications Television System Power Consumption 14"/20"/21" NTSC COLOR TV SIGNAL 14" : 57 WATTS NOMINAL, 20" : 70 WATTS NOMINAL 21" : 75 WATTS NOMINAL, 14" : A34KQV42X 20" : A48KRD82X (H) 21": : A51KQJ63X (H) AC 120V, 60Hz /AC 100 ~ 240, 50Hz, 60Hz REMOCON SYSTEM (SZM354ET) VHF CH : 2-13, UHF CH : 14-69, CABLE CH : 1,14-125 75 ohm UNBALANCED TYPE FOR VHF/UHF PICTURE 45.75MHz, SOUND 41.25MHz, COLOR SUB CARRIER 42.17MHz Single: 8 ohm 3W Dual : 8 ohm 3W x 2 Dual : 16 ohm , 3W x 2 (CT-33H1, CT-50H1) Picture Tube Power Requirement Operating System Tuning Ranges Antenna Input Impedance Intermediate Frequency Speaker Impedance Samsung Electronics 2-1

File name CT331E~4.PDF

Disassembly and Reassembly 3. Disassembly and Reassembly 3-1 Back Cover Removeal Fig. 3-1 1. After removing the screws, pull the cabinet backwards. Samsung Electronics 3-1 Disassembly and Reassembly 3-2 Main Board Removal Fig. 3-2 Fig. 3-3 1. Separate the socket board from the CRT neck. 2. Remove the Anode Cap from the CRT. 3. Remove the main board by pulling it with both hands. Warning: The FBT is charged with high voltage. Before removing the Anode Cap, discharge the voltage through one of the heat sinks on the main board. 3-2 Samsung Electronics Disassembly and Reassembly 3-3 Speaker Removal 1. Loosen the screws and remove the speakers. Fig. 3-4 Samsung Electronics 3-3 Disassembly and Reassembly 3-4 CRT Removel Fig. 3-5 1. Spread a soft mat on the floor. Place the TV set face down. 2. Remove the 4 nuts mounting the CRT to the front cabinet. 3. Lift the CRT. 4. Caution: Because of the high vacuum and large surface area of the picture tube, be careful while handling it: (1) Always lift the picture tube by grasping it firmly around the faceplate, (2) Never lift the tube by its neck. (3) Do not scratch the picture tube or apply excessive pressure. Fractures of the glass may cause an implosion. 3-4 Samsung Electronics

File name CT331E~5.PDF

Alignment and Adjustments 4. Alignment and Adjustments 4-1 Service Mode Adjustments 4-1-1 Service Mode Menus Since there are no VRs in the K15A chassis, all adjustments after parts replacement must be done in the Service Mode. Service Mode adjustments are necessary when either the EEPROM (IC902) or the CRT is replaced. 4-1-2 Entering the Service Mode Press the following transmitter keys while in STAND-BY mode: MUTE-->1-->8-->2-->POWER "Factory Mode Menu" is displayed ADJUSTMENT PATTERN OPTION RESET <---selected (violet) Change the data with "Volume +, - " keys. VCO 71 Enter Service Mode using the Volume +,- keys. Service Mode Menu: AGC VCO SBT SCT SCR STT GG BG XX XX XX XX XX XXX XXX XXX RC XXX GC XXX BC XX VA XX VS XX HS XX SS XX SVC : MUTE Return to the Service mode by pressing MENU. AGC VCO SBT SCT SCR STT GG BG XX XX XX XX XX XXX XXX XXX XXX RC XXX GC XX BC VA XX VS XX HS XX SS XX SVC : MUTE Select a mode to be adjusted, using the channel down key. Example: VCO. AGC VCO SBT SCT SCR STT GG BG XX XX XX XX XX XXX XXX XXX RC XXX GC XXX BC XX VA XX VS XX HS XX SS XX SVC : MUTE Return to the Factory mode via the MENU key. ADJUSTMENT PATTERN OPTION RESET Press POWER to enter the Stand-by mode. Samsung Electronics 4-1 Alignment and Adjustments 4-1-3 Adjustment in Option Mode This adjustment is necessary whenever the EEPROM is replaced. Input data (as marked on the back cabinet). ADJUSTMENT PATTERN OPTION RESET Select "SET OPTION" by pressing the Channel w key twice. ADJUSTMENT PATTERN OPTION RESET Press the Volume +, - keys to enter the set Option mode. BYTE 0 : 0 0 Press MENU to go back to the factory mode. ADJUSTMENT PATTERN OPTION RESET 4-1-4 Service Mode Adjustments ADJUSTMENT PATTERN OPTION RESET 1. The Pattern Adjustment is done only in the factory. Do not attempt to readjust it. 2. Refer to 4-2 for other adjustments. 3. Set OPTION data. 4-1-5 Service Mode Adjustment Ratings No Item Function Range 0~63 0~127 0~63 0~27 0~27 0~255 0~255 0~255 Initalized MICOM Data 50 63 48 13 7 0 0 0 1 AGC RF AGC Adjustment 2 VCO PIF VCO Adjustment 3 SCT SUB-CONTRAST Adjustment 4 SCR SUB-COLOR Adjustment 5 STT SUB-TINT Adjustment 6 RC 7 GC RED-CUT OFF Adjustment GREEN-CUT OFF Adjustment BLUE-CUT OFF Adjustment Select RESET with channel ADJUSTMENT PATTERN OPTION RESET w key. 8 BC 9 SVC Input a Horiz line pattern 10 GG 11 BG GREEN-GAIN Adjustment BLUE-GAIN Adjustment 0~255 0~255 0~63 0~63 0 0~31 0~31 127 127 31 39 0 15 4 12 SBT SUB-BRIGHTNESS Adjustment 13 VA VERTICAL SIZE Adjustment VERTICAL CENTER Adjustment HORIZONTAL Phase Adjustment SUB-SHARPNESS Adjustment Press volume + key. POWER OFF 14 VS 15 HS 16 SS Note : The initial MICOM data values take effect when IC902 is replaced. 4-2 Samsung Electronics Alignment and Adjustments 4-2 Alignment and Adjustment 4-2-1 General Alignment Instructions 1. Usually, a color TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as picture height, focus and

File name CT331E~6.PDF

Troubleshooting 5. Troubleshooting 5-1 No Power No Power OFF Check LED when AC code is plugged. ON Check IC802. Abnormal Abnormal Check Fuse. Normal Check/Replace IC802, R812, D856. Check and Replace D807 ~D810 Check IC801* Pin 1 Oscillation. Abnormal Abnormal (0 ~ 15V) Check IC801 Pin 3 B+. Check/Replace D806, Q401, Q801, D802, D814* Abnormal (0V) Normal (15~20V) Check IC801* Pin 4 Voltage Normal (0.5 ~ 3V) Check/Replace PC802, DZ807 Check/Replace DZ802, DZ803, D806 Samsung Electronics 5-1 Troubleshooting 5-2 No Sound No Sound Normal Check Connector CN601 and CN701. Abnormal Abnormal Check Waveform of IC601 Pin 1. Normal Check CN601 and CN701 Connector Soldering and A/V PCB. Normal Check Waveform of IC201 Pin 52. Abnormal Check Waveform of IC601 and IC602 Pins 4. Abnormal Normal Ok Check Waveform of IC201 Pin 1. Abnormal Normal Check Voltage of IC601 and IC602 Pin 5. Check SIF (L201). Abnormal Check Power 12V Line Voltage. Replace IC601 and IC602. Normal (approx. 12V) Volume Up. NG Check/Replace IC201. O.K 5-2 Samsung Electronics Troubleshooting 5-3 Horizontal Line Appears Single Horizontal Line Normal (24V) Check 24V-C Voltage. Abnormal Abnormal Check Waveform of IC201 Pins 22,24. Check FBT Pin 2 (24V) Oscillation. Normal NG Check Whether O.K a horizontal line appears in Normal the service mode.. NG Check/Replace IC201. Check/Replace IC301. Check R409 Open. Open Check/Replace R409. Check/Replace FBT. Samsung Electronics 5-3 Troubleshooting 5-4 No Signal No Signal Abnormal Check each tuner terminal voltage. Normal Check voltage line. Abnormal Check tuner SCL,SDA waveform. Normal Check Micom IC901. Normal Check tuner IF terminal waveform. Abnormal Replace tuner. Check IC201 Pins 7,8 waveform. Check IC201 Pin 41 waveform level. Normal Check whether AGC and AFTadjustment are normal in the service mode. Normal (2Vp-p) Check IC201 Pin 43 waveform level. Abnormal Normal Abnormal Check IC201 Pin 47 waveform level. Readjust AGC and AFT. Normal (1Vp-p) Check IC201 Pins 19,20, 21 waveform level. Abnormal Normal (2Vp-p) Check IC201 Pin 37 waveform level. Normal (3~5Vp-p) Replace IC201. Check CRT PCB (180V) and heater Voltages. Normal (1Vp-p) 5-4 Samsung Electronics

File name CT331E~9.PDF

Block Diagram 8. Block Diagram IC601 TU01* TUNER TELH9-212A SAW M1859M SOUND-AMP 2.5W x 1CH LA4425 IC902 EEPROM KS24C020 IC201 1CHIP IF/V/C/D KA2163B I2C BUS Q401* IC901* MICOM SZM-354ET EXT IN EXT IN VIDEO AUDIO VERTICAL-AMP KA2131 D807 ~ D810 T801* SWITCHING TRANS S:125V,12.5V IC801* SPS CONTROL KA3SO680 KA3S0765 PC802 PHOTO COULPER (125V) H-TR KSC5368 DUAL R.G.B CRT T444* F.B.T 14" : FSV14A001 20" : FSV20A001 21" : FSV20A001 (12.5V) IC802 (5V) MULTI-REGULATOR KA7631 (9V) MICOM 1CHIP Samsung Electronics 8-1

File name CT331~10.PDF

PCB Layout 9. PCB Layout 9-1 PCB-MAIN Loc. No. X DIODE D101 D102 D103 D201 D202 D203 D204 D205 D206 D207 D208 D210 D299 D301 D302 D401 D402 D403 D404 D405 D407 D601 D701 D702 D703 D704 D802 D803 D804 D805 D806 D807 D808 D809 D810 D814 D855 D856 D901 D902 D903 D904 D905 D906 DL01 DL02 DU01 DX01 DX02 DZ801 DZ802 DZ803 DZ806 DZ807 DZ901 DZ902 DZ903 53 56 71 135 96 96 96 123 114 114 115 99 99 32 31 85 70 59 72 81 58 124 130 227 210 85 104 150 92 168 150 186 193 186 196 99 157 147 160 163 171 132 231 157 105 108 211 116 111 215 179 178 157 150 231 231 203 150 130 141 196 105 107 110 92 95 97 74 105 212 139 146 99 98 74 53 38 105 213 136 203 238 159 11 23 183 42 27 51 54 67 66 60 100 101 119 110 130 96 179 131 219 219 118 107 101 20 30 24 17 20 83 156 124 IC201 IC301 IC601 IC602 IC801 IC802 IC901 IC902 ICK01 Q151 Q201 Q202 Q203 Q401 Q402 Q501 Q502 Q503 Q601 Q602 Q801 Q902 Q903 QL01 QL03 QLK1 QU01 QU10 QX01 Y Loc. No. X IC 100 50 146 168 155 141 215 219 69 TRANSISTOR 61 107 101 99 24 63 24 32 12 145 132 100 119 87 80 115 106 197 195 112 164 132 225 221 10 97 153 178 213 183 129 140 144 85 118 197 197 195 203 223 29 226 115 237 226 229 173 115 113 Y Samsung Electronics 9-1

File name CT331~11.PDF

Schematic Diagrams 11. Schematic Diagrams 11-1 MAIN 1/4 : Power Line : Signal Line Samsung Electronics 11-1 Schematic Diagrams 11-2 MAIN 2/4 TP13 IC201 30PIN TP14 IC201 32PIN TP15 IC201 37PIN TP16 IC201 41PIN TP18 TP16 TP21 TP20 TP14 TP17 IC201 43PIN TP18 IC201 45PIN TP13 TP19 TP15 TP17 TP19 IC201 47PIN TP20 IC201 49PIN TP2 TP5 TP6 TP4 TP1 TP7 TP3 TP8 TP10 TP11 TP12 TP12 IC201 28PIN TP21 IC201 53PIN TP9 TP10 IC201 25PIN TP11 IC201 27PIN TP1 IC201 2 PIN TP2 IC201 4 PIN TP3 IC201 7PIN TP4 IC201 19PIN TP5 IC201 20PIN TP6 IC201 21PIN TP7 IC201 22PIN TP8 IC201 23PIN TP9 IC201 24PIN : Power Line : Signal Line 11-2 Samsung Electronics Schematic Diagrams 11-3 MAIN 3/4 TP24 TP24 TP25 IC801 1 PIN TP26 TP25 TP27 TP27 T444 10 PIN TP26 : Power Line Si l Li Samsung Electronics 11-3 Schematic Diagrams 11-4 MAIN 4/4 : Power Line : Signal Line 11-4 Samsung Electronics