COLOR TELEVISION RECEIVER Chassis : Model : COLOR TELEVISION RECEIVER KS9A(P) CS21M20MQZXBWT CONTENTS 1. Precautions 2. Specifications and IC Data 3. Disassembly and Reassembly 4. Alignment and Adjustment 5. Troubleshooting 6. Exploded View and Parts List 7. Electrical Parts List 8. Block Diagram 9. Wiring Diagram 10.
ELECTRONICS This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable International and/or domestic law. © Samsung Electronics Co., Ltd. Apr.
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.
Precautions 1-1 Safety Precautions (Continued) 9. High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components. 10. Design Alteration Warning: Never alter or add to the mechanical or electrical design of this unit. Example: Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard.
Precautions 1-2 Servicing Precautions Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between the servicing and safety precautions, always follow the safety precautions. Warning2: An electrolytic capacitor installed with the wrong polarity might explode. 1. Servicing precautions are printed on the cabinet. Follow them. 2.
Precautions 1-3 Precautions for Electrostatically Sensitive Devices (ESDs) 1. Some semiconductor (“solid state”) devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity. 2.
Specifications and IC Data 2. Specifications and IC Data 2-1 Specifications Television System: Channels: Intermediate Frequencies (MHz) : CI PAL-I (UHF) CII PAL-I (VHF/UHF) CX PAL-B/G, SECAM-B/G CK PAL-B/G, D/K, SECAM-B/G, D/K CW PAL-B/G, D/K, SECAM-B/G, D/K, NT 4.43 CS PAL-B/G, D/K, SECAM-B/G, D/K, NT4.43, NT3.
Specifications and IC Data 2-2 IC Line Up Table 2-1 IC Line-Up Loc.
Specifications and IC Data 2-3 Semiconductor Base Diagrams ELECTROLYTICCONDENSER IC DIODE SPM-802ERN(Pin 64) SPM-802ER(Pin 64) X24CO8P(Pin 8) KS24C080(Pin 8) U4468B(Pin 16) TRANSISTOR TRANSISTOR IC SAW-FILTER G3956M K9260M 11 1 2SD1651 2SD1650 2SD2499 KSA614 B C E KSC815-Y KSA539-Y BC548 KTC9014 UPC574J or KA33V E B C IC TRANSISTOR LA7840 TDA6107Q KA7632 KSR1012 KSR1010 KSR2010 KTD863-Y KSC2331-Y E C B Fig.
MEMO 2-4
Disassembly and reassembly 3. Disassembly and Reassembly 3-1 Back Cover Removal 1. After removing the screws, press the tension rib and pull the cabinet backwards. 2. To reassemble, press the tension rib (see diagram).
Disassembly and reassembly 3-2 Main Board Removal 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.
Disassembly and reassembly 3-3 Speaker Removal 1. Remove the speaker by pressing the tension rib.
Disassembly and reassembly 3-4 CRT Removal 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. Lift the CRT. 3. 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.
Alignment and Adjustments 4. Alignment and Adjustments 4-1 Preadjustment 4-1-1 Factory Mode 4-1-3 When CRT Is Replaced 1. Do not attempt these adjustments in the Video Mode. 1. Make the following adjustments AFTER setting up after setting up purity and convergence : 2. The Factory Mode adjustments are necessary when either the EEPROM (IC902) or the CRT is replaced. 3. Do not tamper with the “Adjustment” screen of the Factory Mode menu. This screen is intended only for factory use.
Alignment and Adjustments 4-2-2 Main Adjustment Parameter OSD AGC SCT SBT BLR BLB RG GG BG VSL VS VA HS SC CDL STT AKB PDL NDL PSR NSR VOL LCO TXP MVOL FMWS AGCS OMD SCL PWL AGN PEK ACL FCO SCBT SSP PSNS 4-2 FUNCTION RANGE INITIAL DATA REMARK RF AGC 0 … 63 33 Sub contrast 0 … 23 13 Sub brightness 0 … 23 9 Black level offset R 0 … 63 31 Black level offset B 0 … 63 27 White point R 0 … 63 32 White point G 0 … 63 32(FIX) White point B 0 … 63 31 Vertical slope 0 … 63 19 Vertical shift 0 … 63 38 Vertical am
Alignment and Adjustments 4-2-3 Option Bytes In the Service Mode, various can be selected via the Option Table.
Alignment and Adjustments 4-2-4 RESET The Reset Mode is used during factory inspection. Function Reset: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Picture Auto Volume Color System Sound System Blue Screen Low Noise AMP Volume CH. Skip CH. Lock Timer Custom Off Auto (option) D/K (option) Off Off (option) 10 Erased Off Off 4-3 Other Adjustments 4-3-1 General 1. Usually, a color TV needs only slight touchup adjustment upon installation.
Alignment and Adjustments 4-3-3 High Voltage Check 4-3-6 Purity Adjustment CAUTION: There is no high voltage adjustment on this chassis. The B+ power supply must be set to +125 volts (Full color bar input and normal picture level). 1. Warm up the receiver for at least 20 minutes. 1. Connect a digital voltmeter to the second anode of the picture tube. 2. Plug in the CRT deflection yoke and tighten the clamp screw. 3. Plug the convergence yoke into the CRT and set in as shown in Fig. 4-2. 2.
Alignment and Adjustments 4 Pole Magnet 2 Pole Magnet 6 Pole Magnet 2 POLE PURITY Clamper Screw ADJUST THE ANGLE (VERTICAL LINES) YOKE CLAMP SCREW 6 POLE CONVERGENCE 4 POLE CONVERGENCE Fig. 4-2 Convergence Magnet Assembly Vertical Green Belt 31m/m Fig. 4-3 Center Convergence Adjustment 4-3-7 White Balance Adjustment (a) Set up 1 1. Warm up the TV for at least 30 minutes in the Aging Mode (OSD White). This mode is displayed by entering the following sequence: DISPLAY →FACTORY → FACTORY 2.
Alignment and Adjustments 4-3-8 Center Convergence Adjustment 1. Warm up the receiver for at least 20 minutes. 2. Adjust the two tabs of the 4 pole magnets to change the angle between them. Superimpose the red and blue vertical lines in the center area of the screen. 3. Adjust the Brightness and Contrast controls for a well defined picture. 4. Adjust the two-tab pairs of the 4 pole magnets, and change the angle between them. Superimpose the red and the blue vertical lines in the center area of the screen.
Alignment and Adjustments 4-3-9 RF AGC Adjustment Set the AGC data to 33 (Factory Mode). 4-3-10 Sub-Color Adjustment Set PSR data to 2 (Factory Mode). NSR 5 5 5 4-3-11 Geometry Adjustment SC VS→VSL→HS Fig. 4-9 1. Input a lion head pattern (in the PAL channel). 2. Set the SC (S-Correction) as follows : 9 (21”), 9 (20”), 0 (14”) and VA 40 so that the lion 24(21"flat) head circle becomes oval. 6. Adjust HS (using the width coil) so that the left and right margins of the picture are 5. 3.
Troubleshooting 5.
Troubleshooting 5-2 No Power No Check/Replace IC801S, D801S, D802S, D803S,D804S,FP801S No Check/Replace IC802 (KA7632) No Check/Replace IC201S Check IC201S Pin 1 : Stand-by : 0V Normal : 3.3V No Check/Replace IC201S, (µ-com). Check IC201S, Pin 33 (H-out) No Check/Replace IC201S, Q401, Q402. Check the 125V, 13.0V B+ Lines Yes Check IC802 Pin 8 (8V) Pin 9 (9V) Pin 10 (5V) Check IC201S Pin 1 (3.
Troubleshooting 5-3 No Video (Sound OK) Check IC201S Pin 40 (CVBS) No Check/Replace IC201S Yes Check IC201S Pins 38/R214, R215 Check IC201S Pin 49 (V-GUARD) Pin 50 (Cut-off) Pin 51~53 (R,G,B-out) No No Check/Replace IC201S Yes Check IC501 on the CRT PCB No Check/Replace IC501 Check/Replace R421, R505 (HEATER 6.
Troubleshooting 5-4 No Sound (Video OK) Check IC201S Pin 44 (Sound Out) No Check/Replace IC201S Yes Check/Replace Q904, IC201S No Check/Replace R814, R815 No Check/Replace IC601 Yes Check IC601 Pins 6 (0V) No Check IC601 Pin 3,13 (B+ 10-12.5V) Yes Check IC601 Yes Check/Replace A/V Front assembly.
Exploded View & Parts List 6. Exploded View & Parts List 6-1 CS21M20MQZXBWT You can search for the updated part code through ITSELF web site. URL : http://itself.sec.samsung.co.kr Remark Samsung Electronics Code No Description Specification Q’ty S.N.A T0003 AA64-03863B CABINET FRONT;21M20,HQ,TTSEC,HIPS,HB,G43 1 S.N.A T0023 AA64-03860A KNOB POWER;29M20,ABS,HB,G3676,SVM3012 1 S.N.A CIS7 AA61-60003J SPRING ETC-CS;-,SUS304,-,-,OD6,N7,OD6,-, 1 S.N.
Electrical Parts List You can search for the updated part code through ITSELF web site. URL : http://itself.sec.samsung.co.kr 7. Electrical Parts List 7-1 CS21M20MQZXBWT Level Loc. No. Code No. Description ; Specification Remark ASSY COVER FRONT 1 M0001 AA90-04993B ASSY COVER FRONT;CS21M20MQZXBWT S.N.A ..2 ..2 ..2 ..2 ..2 ..2 ..2 ..2 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ..
Electrical Parts List Level Loc. No. Code No. .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 .....5 ....4 ...3 ....4 ....4 ....4 ....4 ....4 ...3 ....4 ....4 ....4 ....4 ...3 ....4 ....4 ....4 ....4 ....4 ...3 ....4 ....4 ....4 ....4 ...3 ....4 ....4 ....4 ...3 ....4 ....4 ....4 ...3 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....
Electrical Parts List Level Loc. No. Code No. ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....
Electrical Parts List Level Loc. No. Code No. ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....
Electrical Parts List Level Loc. No. Code No. ...3 ...3 ...3 ...3 ...3 ...3 ....4 ...3 ..2 ...3 ...3 ...3 ...3 ...3 ...3 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....
Electrical Parts List MEMO 7-6 Samsung Electronics
Block Diagram 8. Block Diagram 8-1 KS9A
Wiring Diagram 9.
MEMO 9-2
Schematic Diagrams 10.
Schematic Diagrams 10-2 SOUND, EXT-A/V (SCART) : Power Line 10-2 Samsung Electronics
Schematic Diagrams 10-3 SOUND, EXT-A/V (RCA) : Power Line Samsung Electronics 10-3
Schematic Diagrams 10-4 POWER / CRT / VERTICAL / HORIZONTAL TP01 TP02 TP06 TP03 TP05 TP04 TP04 TP03 TP02 TP05 TP01 TP06 : Power Line 10-4 Samsung Electronics
Schematic Diagrams 10-5 SUB PCB-MONO Samsung Electronics 10-5
Schematic Diagrams 10-6 SUB PCB-STEREO 10-6 Samsung Electronics