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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
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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
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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
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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
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