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                   FILE NO. 060-200454




SERVICE MANUAL


Color Television
                 21CJ1R
                  21J1E
                 21J1ES
                  21J1H
                  21J1M
                 21J1MJ
                   21J1T

                            Sep. 2004 (YC/X)
                                                                             TABLE OF CONTENTS
                      CHAPTER 1 GENERAL ADJUSTMENTS
GENERAL ADJUSTMENTS




                          SAFETY INSTRUCTIONS ........................................................................................................................................ 3
                          SET-UP ADJUSTMENT ............................................................................................................................................ 4

                          SERVICE MODE ...................................................................................................................................................... 6
                          DESIGN MODE ........................................................................................................................................................ 9
                          ELECTRICAL ADJUSTMENTS .............................................................................................................................. 10
                          CIRCUIT CHECK .................................................................................................................................................... 12

                      CHAPTER 2 SPECIFIC INFORMATIONS
                          SETTING & ADJUSTING DATA .............................................................................................................................. 13
                          LOCATION OF CONTROLS ................................................................................................................................... 14
                          PROGRAMMING CHANNEL MEMORY ................................................................................................................. 15
                          CHASSIS AND CABINET REPLACEMENT PARTS LIST ...................................................................................... 17

                          PC BOARDS BOTTOM VIEW ................................................................................................................................. 25

                          TERMINAL VIEW OF TRANSISTORS ................................................................................................................... 30
                          CIRCUIT BLOCK DIAGRAM .................................................................................................................................. 32

                          SPECIFICATIONS .............................................................................................................................................. END
                          APPENDIX:
                                        CIRCUIT DIAGRAM




                                                                                                         -2-
 CHAPTER 1 GENERAL ADJUSTMENTS
                                            SAFETY INSTRUCTIONS




                                                                                                                                      GENERAL ADJUSTMENTS
 WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAU-
 TION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.

                                               X-RAY RADIATION PRECAUTION
 1. Excessive high voltage can produce potentially hazard-          2. The only source of X-RAY RADIATION in this TV receiver
    ous X-RAY RADIATION. To avoid such hazards, the high               is the picture tube. For continued X-RAY RADIATION pro-
    voltage must not be above the specified limit. The nominal         tection, the replacement tube must be exactly the same
    value of the high voltage of this receiver is (A) kV at zero       type tube as specified in the parts list.
    beam current (minimum brightness) under a (C) V AC power        3. Some part in this receiver have special safety-related char-
    source. The high voltage must not, under any circum-               acteristics for X-RAY RADIATION protection. For contin-
    stances, exceed (B) kV.                                            ued safety, parts replacement should be undertaken only
     Refer to table-1 for high voltage (A), (B) & AC voltage (C).      after referring to the PRODUCT SAFETY NOTICE below.
     (See SETTING & ADJUSTING DATA on page 13)




                                                                                                                                      SPECIFIC INFORMATIONS
    Each time a receiver requires servicing, the high voltage
    should be checked following the HIGH VOLTAGE CHECK
    procedure in this manual. It is recommended that the read-
    ing of the high voltage be recorded as a part of the service
    record. It is important to use an accurate and reliable high
    voltage meter.
                                                     SAFETY PRECAUTION

WARNING : Service should not be attempted by anyone unfamiliar with the necessary precautions on this receiver. The following
are the necessary precautions to be observed before servicing this chassis.
 1. An isolation transformer should be connected in the power line between the receiver and the AC line before any service is
    performed on the receiver.
 2. Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube
    is highly evacuated and if broken, glass fragments will be violently expelled. Use shatter proof goggles and keep picture tube
    away from the unprotected body while handling.
 3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as; non-
    metallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.




                                                  PRODUCT SAFETY NOTICE

  Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are
  often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using
  replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety char-
  acteristics are identified in this manual and its supplements; electrical components having such features are identified by
  the international hazard symbols on the schematic diagram and the parts list.
  Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement
  parts which do not have the same safety characteristics as specified in the parts list may create shock, fire, X-ray
  radiation or other hazards.




                                                             -3-
                       WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAU-
                       TION" AND "PRODUCT SAFETY NOTICE" ON PAGE 3 OF THIS MANUAL.
GENERAL ADJUSTMENTS




                                                                  SET-UP ADJUSTMENT
                        The following adjustments should be made when a complete realignment is required or a new picture tube is installed.
                        Perform the adjustments in order as follows :
                         1. Color Purity
                         2. Convergence
                         3. White Balance
                        Note: The PURITY/CONVERGENCE MAGNET assembly and rubber wedges need mechanical positioning.
                               Refer to figure 1.
                               Mounting position of the purity magnet assembly should fit to same position as old one because slightly difference to
                               the position depend on a kind of tube.

                       *   There are no adjustment of purity and convergence in some picture tube (Unified with purity magnet)

                      COLOR PURITY ADJUSTMENT
                      NOTE : Before attempting any purity adjustments, the receiver    5. Remove the Rubber Wedges.
                               should be operated for at least fifteen minutes.        6. Rotate and spread the tabs of the purity magnet (See fig-
                       1. Demagnetize the picture tube and cabinet using a degauss-       ure 2.) around the neck of the picture tube until the green
                          ing coil.                                                       belt is in the center of the screen. At the same time, enter
                       2. Set the brightness and contrast to maximum.                     the raster vertically.
                       3. Use a green raster from among the built-in test signals.     7. Slowly move the yoke forward or backward until a uniform
                       4. Loosen the clamp screw holding the yoke and slide the           green screen is obtained. Tighten the clamp screw of the
                          yoke backward or forward to provide vertical green belt         yoke temporarily.
                          (zone) in the picture screen.                                8. Check the purity of the red and blue raster.




                                                                                               TEMPORARY
                                                DEFLECTION                                     MOUNTING
                                                YOKE
                                                               29.1mm(28", 29")
                                                               25mm(25")
                                                               19mm(19", 20", 21")
                                                               14mm(13", 14")
                                                                                                                                 RUBBER WEDGE




                                                                                                                                         ADHESIVE


                                                                 PURITY/
                                                                 CONVERGENCE                                           DEFLECTION
                                                                 MAGNET ASS'Y                                          YOKE


                      GLASS CLOTH
                      TAPES


                                                                               Figure 1.




                                                                                      -4-
CONVERGENCE ADJUSTMENTS                                                CIRCUMFERENCE CONVERGENCE ADJUSTMENT
NOTE: Before attempting any convergence adjustments, the              1. Loosen the clamping screw of deflection yoke slightly to
      receiver should be operated for at least fifteen min-              allow the yoke to tilt.
      utes.                                                           2. Temporarily put a wedge as shown in figure 1. (Do not




                                                                                                                                         GENERAL ADJUSTMENTS
                                                                         remove cover paper on adhesive part of the wedge.)
 CENTER CONVERGENCE ADJUSTMENT                                        3. Tilt front of the deflection yoke up or down to obtain better
1. Use the cross-dot pattern from among the built-in test sig-           convergence in circumference. (See figure 3.) Push the
   nals.                                                                 mounted wedge into the space between picture tube and
2. Set the brightness and contrast for well defined pattern.             the yoke to fix the yoke temporarily.
3. Adjust two tabs of the 4-Pole Magnets to change the an-            4. Put other wedge into bottom space and remove the cover
   gle between them (See figure 2.) and superimpose red                  paper to stick.
   and blue vertical lines in the center area of the picture          5. Tilt front of the yoke right or left to obtain better conver-
   screen.                                                               gence in circumference. (See figure 3.)
4. Turn the both tabs at the same time keeping the angle              6. Keep the yoke position and put another wedge in either
   constant to superimpose red and blue horizontal lines at              upper space. Remove cover paper and stick the wedge
   the center of the screen.                                             on picture tube to fix the yoke.
5. Adjust two tabs of 6-Pole Magnets to superimpose red/              7. Detach the temporarily mounted wedge and put it in an-
   blue line and green one. Adjusting the angle affects the              other upper space. Stick it on picture tube to fix the yoke.
   vertical lines and rotating both magnets affects the hori-         8. After fixing three wedges, recheck overall convergence.
   zontal lines.                                                         Tighten the screw firmly to fix the yoke and check the yoke
6. Repeat adjustments 3, 4, 5 keeping in mind red, green                 is firm.
   and blue movement, because 4-Pole Magnets and 6-Pole               9. Stick three adhesive tapes on wedges as shown in figure
   Magnets have mutual interaction and make dot movement                 1.
   complex.
                                           6-POLE
                                           MAGNETS
                      4-POLE                                 ADJUST THE ANGLE
                                                             (VERTICAL LINES)                       FIXED
                      MAGNETS




                                                                                          ROTATE TWO TABS
                                                                                          AT THE SAME TIME
                                                                                          (HORIZONTAL LINES)

                   PURITY
                   MAGNETS

                      CONVERGENCE MAGNET ASSEMBLY                           ADJUSTMENT OF MAGNETS

                                                              Figure 2.
                                  BLU   RED                                                 RED/BLU GRN




                       BLU                                                 RED/BLU
                       RED                                                     GRN




                         4-POLE MAGNETS MOVEMENT                                  6-POLE MAGNETS MOVEMENT


                                              Center Convergence by Convergence Magnets



                                    BGR
                                                                                                B
                                                                                                G
                                                                                                R           RGB
                             R                B
                             G                G
                             B                R
                                                                                          BGR
                                                                                                            R
                                                                                                            G
                                    RGB                                                                     B


                        INCLINE THE YOKE UP (OR DOWN)                           INCLINE THE YOKE RIGHT (OR LEFT)


                                                  Circumference Convergence by DEF Yoke


                                              Figure 3. Dot Movement Pattern



                                                              -5-
                                                                     SERVICE MODE

                      1. ENTERING TO SERVICE MODE
GENERAL ADJUSTMENTS




                         1) Press o button once on                 2) Press o button again to         3) While pressing the o button,
                            Remote Control.                           keep pressing.                     press MENU button on TV set.

                                                                                                                  Item              S
                                                                                                                  Data




                                                                                                                 (Service mode display)

                      2. DISPLAYING THE ADJUSTMENT MENU
                         1) Press MENU button on TV.
                                 Service mode                          Adjustment mode

                                                                                                  Item
                                                         Press                                    Data
                                           S

                                                         Press




                      3. KEY FUNCTION IN THE SERVICE MODE
                         The following key entry during display of adjustment menu provides special functions.

                         A single horizontal line ON/OFF:          - / - - button (on Remote) or a button (on TV)
                         Test signal selection :                   a button (on Remote)
                         Selection of the adjustment items :       Channel s/t (on TV or Remote)
                         Change of the data value :                Volume ; +/



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