LM-522 Service Manual
2
CONTENT TABLE
1.MONITOR SPECIFICATIONS ......................................................................................................4
2. LCD MONITOR DESCRIPTION ..................................................................................................4
3. OPERATING INSTRUCTIONS....................................................................................................5
3.1 GENERAL INSTRUCTIONS...................................................................................................5
3.2 CONTROL BUTTONS............................................................................................................5
3.3 ADJUSTING THE PICTURE...................................................................................................5
4. INPUT/ OUTPUT SPECIFICATION .............................................................................................7
4.1 INPUT SIGNAL CONNECTO..........................................................................................................7
4.2 FACTORY PRESET DISPLAY MODES ............................................................................................7
4.3 POWER SUPPLY REQUIREMENTS................................................................................................8
4.4 PANEL SPECIFICATION........................................................................................................8
4.4.1 Panel Feature.....................................................................................................................8
4.4.2 Display Characteristics ........................................................................................................9
4.4.3 Optical Characteristics.........................................................................................................9
4.4.4 Parameter guideline for CCFL Inverter................................................................................ 10
4.4.5 Back-light Unite................................................................................................................. 10
5. BLOCK DIAGRAM .................................................................................................................... 11
5.1 MONITOR EXPLODED VIEW ...................................................................................................... 11
5.2 SOFTWARE FLOWING CHART ...................................................................................................12
5.3 ELECTRICAL BLOCK DIAGRAM ..................................................................................................14
5.3.1 Main Board.......................................................................................................................14
5.3.2 Inverter/Power Board......................................................................................................... 14
6. SCHEMATIC.............................................................................................................................. 16
6.1 MAIN BOARD ..........................................................................................................................16
6.2 POWER BOARD .......................................................................................................................21
7. PCB LAYOUT............................................................................................................................ 23
7.1 MAIN BOARD ..........................................................................................................................23
7.2POWER BOARD ........................................................................................................................24
7.3 KEYPAD BOARD ......................................................................................................................25
8. MAINTAINABILITY....................................................................................................................26
8.1 REQUIREMENTS AND TOOLS REQUIREMENT ..............................................................................26
8.2 TROUBLE SHOOTING ...............................................................................................................27
8.2.1 MAIN BOARD ........................................................................................................................27
8.2.2 Key Pad Board ................................................................................................................. 29
9. WHITE-BALANCE, LUMINANCE ADJUSTMENT.................................................................... 30
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