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TCM101S001


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                                      S/M No : TCM101S001

Service Manual
Color Television

CHSSIS                 MODEL
CM-101S                DTH-21S7
                       DTH-21S8




  Caution
  : In this Manual, some parts can be changed for improving. their
    performance without notice in the parts list. So, if you need the
    latest parts information, please refer to PPL(Parts Price List)in
    Service Information Center.




                                                       April. 2007
TABLE OF CONTENTS
SAFETY PRECAUTIONS                                                     2
SPECIFICATIONS                                                         3
CIRCUIT BLOCK DIAGRAM                                                  4
ALIGNMENT INSTRUCTIONS                                                 5
    YOUR REMOTE CONTROL                                                5
    SERVICE MODE ADJUSTMENT                                            6
    ASSEMBLY ADJUSTMENT                                                8


APPENDIX(Appendix is provide only by internet[http://svc.dwe.co.kr])
IC DESCRIPTION                                                         11
     UOC III SERIES                                                    11
     LA7848_TV VERTICAL OUTPUT+ EW DRIVER                              23
     24WC16-16 KB EEPROM                                               25
     LA42072N                                                          26
     STR-6754                                                          29
WAVEFORMS                                                              32
TROUBLE SHOOTING GUIDE                                                 33
     NO POWER                                                          33
     NO PICTURE                                                        34
     NO SOUND                                                          35
     CH DON'T MEMORY or SKIP                                           36
     NO COLOR                                                          37
     NO VERTICAL DEFLECTION OR PINCUSHION BADNESS                      37
     REMOTE CONTROL DOESNOT OPERATE                                    38
ELECTRICAL PARTS LIST                                                  39
PRINTED CIRCUIT BOARD                                                  52
SCHEMATIC DIAGRAM                                                      54
EXPLODE VIEW                                                           56




                                           -1-
SAFETY PRECAUTIONS
CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY.               SUBJECT : X-RADIATION
NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC-
TURER'S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID           1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSON-
THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT RESULT-              NEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL
ING PROPERTY DAMAGE OR USER INJURY.                                          SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUBE.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOR-                    HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLT-
OUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND                  AGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN
SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF                 IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLT-AGES MAY
POTENTIAL HAZARDS AND INJURY TO THE USER.                                    CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION
                                                                             AND UNDER CERTAIN CIRCUMSTANCES, AMY PRODUCE RADIA-TION IN
FROM A.C. LINE SHOCK.
                                                                             EXCESS OF DESIRABLE LEVELS.
                                                                          2. ONLY FACTORY SPECIFIED C.R.T ANODE CONNECTORS MUST BE
SAFETY CHECKS
                                                                             USED.DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED, A CHECK               SETS. ALWAYS RE-INSTALL THEM.
SHOULD BE MADE OF THE FOLLOWING:                                          3. IT IS ESSENTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCU-
                                                                             RATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE
SUBJECT:FIRE & SHOCK HAZARD                                                  METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE
                                                                             STANDARD. SUCH AS THE ONE AVAILABLE AT YOUR DISTRIBUTOR.
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY AS            4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE
   TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS. THIS IS                IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR
   ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE TRANS-                    CHASSIS IS SERVICED, THE BRIGHTNESS SHOULD BE RUN UP AND DOWN
   PORTED TO AND FROM THE REPAIR SHOP.                                       WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES SUCH AS              THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND
   INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER              THAT IT IS REGULATING CORRECTLY. WE SUGGEST THAT YOU AND YOUR
   SUPPLY CORDS, AND OTHER HARDWARE HAVE BEEN REINSTALLED PER                SERVICE ORGANIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE
   ORIGINAL DESIGN. BE SURE, THAT THE SAFETY PURPOSE OF THE                  REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING
   POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.                                PROCEDURE, AND THAT THE HIGH VOLTAGE READING BE RECORDED ON
3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD SOL-                EACH CUSTOMER'S INVOICE.
   DER JOINTS, SOLDER SPLASHES OF SHARP SOLDER POINTS. BE CER-            5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A
   TAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.
                                                                             PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION TO
                                                                             UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE
   PARTS AND COMPONENTS, FOR FRAYED LEADS, DAMAGED INSULATION
                                                                             SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IS NECESSARY
   (INCLUDING A.C. CORD), AND REPLACE IF NECESSARY. FOLLOW ORIGI-
   NAL LAYOUT, LEAD LENGTH AND DRESS.                                        TO LOCATE THE CAUSE OF EXCESSIVE VOLTAGE.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING TUBE OR A                6. REFER TO HV, B+ AND SHUTDOWN ADJUSTMENT PROCEDURES
   RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PRO-                DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE
   TRUDING METAL SURFACES MUST BE AVOIDED.                                   USED).
6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTOR,
   CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES.            SUBJECT : IMPLOSION
   DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE SPECI-
   FIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS.                      1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTEGRA
7. AFTER RE-ASSEMBLY OF THE STE ALWAYS PERFORM AN A.C. LEAKAGE               IMPLOSION PROTECTION SYSTEM. BUT CARE SHOULD BE TAKEN TO
   TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET. (THE CHAN-             AVOID DAMAGE DURING INSTALLATION. AVOID SCRATCHING THE TUBE.
   NEL SELECTOR KNOB, ANTENNA TERMINALS, HANDLE AND SCREWS) TO               OF SCRATCHED REPLACE IT.
   BE SURE THE SET IS SAFE TO OPERATE WITHOUT DANGER OF ELECTRI-          2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.
   CAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS
   TEST USE AN A.C. VOLTMETER, HAVING 5000 OHMS PER VOLT OR MORE          SUBJECT : TIPS ON PROPER INSTALLATION
   SENSITIVITY, IN THE FOLLOWING MANNER : CONNECT A 1500 OHM 10
   WATT RESISTOR, PARALLELED BY A .15 MFD. 150V A.C. TYPE CAPACI-         1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR
   TOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER POPE, CON-                   CLOSELY FITTING SHELF SPACE, OVER OR CLOSE TO HEAT DUCT, OR IN
   DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME.
                                                                             THE PATH OF HEATED AIR FLOW.
   MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM
                                                                          2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO
   RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND
                                                                             INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS
   REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC
   PART. VOLTAGE MEASURED MUST NOT EXCEED .75 VOLTS R.M.S THIS               WHERE STEAM LEAKAGE IS A FACTOR, ETC.
   CORRESPONDS TO 0.5 MILLIAMP A.C. NAY VALUE EXCEEDING THIS LIMIT        3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING.
   CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED                THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE
   IMMEDIATELY.                                                              SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILA-
                                                                             TION.
                                                                          4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCIAL
                                                                             MOUNTING KIT, MUST FOLLOW THE FACTORY APPROVED MOUNTING
                               A.C. VOLTMETER
                                                                             INSTRUCTIONS. A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST
                                                                             RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPAC-
                                                                             ERS)TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR
                                                                             SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR
                                                                             WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.
                                     0.15 uF
                                                                          5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON
                                                                             SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS
         GOOD EARTH GROUND                           PLACE THIS PROBE
         SUCH AS THE WATER        1500         OHM
                                                     ON EACH EXPOSED
                                                                             PROPERLY SECURED.
         PIPE, CONDUIT, ETC.
                                    10WATT           METAL PART           6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNT-
                                                                             ING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRY-
SUBJECT : GRAPHIC SYMBOLS                                                    ING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR
                   THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL,                DEEP PILE CARPETS.
                   WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO         7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH
                   ALERT THE SERVICE PERSONNEL TO THE PRES-ENCE              HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES. INC. FOR
                   OF UNINSULATED "DANGEROUS VOLTAGE"                        USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR
                   THAT MAY BE OF SUFFICIENT MAGNITUDE TO CON-               GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER
                   STITUTE A RISK OF ELECTRIC SHOCK.                         SCREEN SIZE.
                                                                          8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS,
                   THE EXCLAMATION POINT WITHIN AN EQUILATERAL               EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE
                   TRIANGLE IS INTENDED TO ALERT THE SERVICE                 OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND
                   PERSONNEL TO THE PRESENCE OF IMPORTANT                    FAMILY.
                   SAFETY INFORMATION ON SERVICE LITERATURE.



                                                                        -2-
SPECIFICTION

                    Model
 Item                       DTH-21S7 / 21S8

 CHASSIS                    CM-101S
 TV Standard                NTSC-M, PAL-N, PAL-M
 Power Input                AC 220V, 50/60Hz
 Power Consumption          80W
 Tuning System              Frequency Synthesizer(FS) Tuning System
 Tuning Ranges              TV      VHF(L) : CH2 - CH6
                                    UHF(H) : CH7 - CH13
                                    UHF : CH14 - CH69
                            CATV VHF(L) : 5A, A,B,A-5-A-1,CH2-CH6
                                    VHF(H) : C-W+11,CH7 - CH13
                                    UHF : W+12-W+84



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