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SERVICE MANUAL
  COLOR MONITOR
                            (7Alr Series)




   41AA791V-AOC-A00




      P/N : A791V-1C-01-A
     Date: Dec-18-01
     Ver : A00
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY
REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL;
WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF
PUBLICATION AND DISCLAIMS LIABILITY FOR CHANGES, ERRORS OR OMISSIONS,

MANUFACTURE DATE : December . 2001




                                     1
                                                      TABLE OF CONTENTS
PAGE
  1. SPECIFICATIONS .....................................................................................................          3-4

   2.    PRECAUTION AND NOTICES ................................................................................                    5
         2-1 SAFETY PRECAUTIONS ..............................................................................                      5
         2-2 PRODUCT SAFETY NOTICE .......................................................................                          5
         2-3 SERVICE NOTES ...........................................................................................              5
         2-4 HIGH VOLTAGE WARNING .......................................................................                           6

   3.    OPERATING INSTRUCTIONS ................................................................................                    7

   4.    ADJUSTMENT ..........................................................................................................       8
         4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ...............................                                                   8
         4-2 MAIN ADJUSTMENTS .................................................................................                      8
         4-3 ADJUSTMENT METHOD .............................................................................                      8-11

   5.    CIRCUIT DESCRIPTION ..........................................................................................          11-14

   6.    TROUBLE SHOOTING CHART ..............................................................................                     15
         6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS ..............................                                               15
         6-2 ABNORMAL DISPLAY .................................................................................                    17
         6-3 NO BLANKING ...........................................................................................               18
         6-4 HOR. /OSC /DEF /HV CIRCUIT FAULT ......................................................                               18
         6-5 ABNORMAL HORIZONTAL DEFLECTION ..............................................                                         19
         6-6 ABNORMAL VERTICAL SCANNING ........................................................                                   20
         6-7 SIDE-PIN CUSHION DISTORTION .............................................................                             20
         6-8 POOR FOCUS .................................................................................................          21
         6-9 NO SOUND (FOR AUDIO MODEL ONLY)................................................                                       21
         6-10 POWER SUPPLY TROUBLE SHOOTING CHART ....................................                                             22

   7.    MECHANICAL OF CABINET FRONT DIS-ASSEMBLY......................................                                            23

   8.    PARTS LISTING .......................................................................................................     24

   9.    BLOCK DIAGRAM (DEFLECTION) .......................................................................                        42

   10. IC BLOCK DIAGRAMS............................................................................................               43

   11. PCB LAYOUT ............................................................................................................     47

   12. SCHEMATIC DIAGRAM .........................................................................................                 49




                                                                        2
                      1. SPECIFICATIONS FOR 7Klr SERIES COLOR MONITOR

1.   CRT :         43.2CM(17") 90 Deflection, 29mm Neck, Pure flat 0.25mm Dot Pitch, Non-Glare Screen

2.   Viewable image Size: 40.6CM (16") diagonal

3.   Display Color:         Unlimited Colors

4.   External Controls:
     Power On/Off, OSD key, Function knob: Contrast, Brightness, H-Size, H-Center, V-Size, V-Center, ZOOM,
     Pincushion, Trapezoid, Pin-Balance, Parallelogram, Rotation, Moire Reduce,H-Convergence, V- Convergence
     language select, Recall, Degaussing, Color Temperature.

5.   Input Video Signal

                       Mode 1      Mode 2      Mode 3    Mode 4
                      RGB Analog   RGB Analog RGB Analog RGB Analog
     Horiz. Sync:      TTL Level   TTL Level   TTL Level TTL Level
                       Negative    Negative    Negative  Positive
     Vert. Sync:       TTL Level   TTL Level   TTL Level TTL Level
                       Positive    Negative    Negative  Positive

     Horizontal:       640 (H)      720 (H)      640 (H)        800 (H)
     Vertical :        480 (V)      400 (V)      480(V)         600 (V)
     Fh (kHz):         31.47        31.47        43.3           53.67
     Fv (Hz) :         60           70           85             85

                       Mode5      Mode 6         Mode7          Mode 8
                      RGB Analog RGB Analog     RGB Analog     RGB Analog
     Horiz. Sync:      TTL Level  TTL Level      TTL Level      TTL Level
                       Positive   Positive       Positive       Positive
     Vert. Sync:       TTL Level  TTL Level      TTL Level      TTL Level
                       Positive   Positive       Positive       Positive

     Horizontal:       1024 (H)     1280 (H)     1280 (H)      1600 (H)
     Vertical :        768 (V)      960 (V)      1024 (V)      1200 (V)
     Fh (kHz):         68.6         85.9         91.1          93.8
     Fv (Hz) :         85           85           85            75

6.   Display Size
     Horizontal:             310 mm
     Vertical:               232.5 mm


7.   Scanning Frequencies
     Horizontal:          30KHz ~ 96KHz
     Vertical:            50 Hz ~ 160 Hz

8.   Factory Preset Timings: 8
     User Timings: 20

9.   Misconvergence
     Center:                 0.3 mm Max.
     Corner:                 0.4 mm Max.

10. Video Bandwidth:        200 MHz




                                                           3
11. Power Source:
    Switching Mode Power Supply
    AC 100 ~240V, 50/60Hz Universal Type

12. Operating Temperature:      10 OC to 35OC Ambient

13. Humidity : 10% to 85% Relative, Non-Condensing

14



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