NEC LCD1550X Service Manual page 5

2. Adjustment procedure ............................................................................................................... 2-1
2.1 Application ........................................................................................................................... 2-1
2.2 Measurement instruments used ........................................................................................ 2-1
2.3 Standard setting state ........................................................................................................ 2-1
2.4 Names of each LCD monitor part, and adjustment methods ........................................ 2-2
2.4.1 Configuration of front control panel ....................................................................... 2-2
2.4.2 OSM operation method ............................................................................................ 2-2
2.4.3 Configuration of signal input / power input section ............................................. 2-3
2.5 PWB, mechanism and appearance inspection ............................................................... 2-4
2.5.1 Visual and conductivity check ................................................................................. 2-4
2.5.2 Mechanism and appearance inspection ................................................................ 2-4
2.5.3 PWB adjustment ........................................................................................................ 2-6
2.5.3.1 Initial writing in EEPROM data .................................................................. 2-6
2.6 General adjustment and inspection .................................................................................. 2-6
2.6.1 Preparation ................................................................................................................ 2-6
2.6.1.1 Confirming operation of operation SW and functions ............................ 2-6
2.6.1.2 Inspection of picture ................................................................................... 2-6
2.6.1.3 Aging ............................................................................................................. 2-7
2.6.2 Main adjustment ........................................................................................................ 2-7
2.6.2.1 Confirming OSM picture during heat running ......................................... 2-7
2.6.2.2 BIAS adjustment .......................................................................................... 2-7
2.6.2.3 GAIN adjustment ......................................................................................... 2-7
2.6.2.4 BRIGHT-LIMIT adjustment ......................................................................... 2-7
2.6.2.5 Confirming color coordination of Liquid Crystal Panel .......................... 2-7
2.7 Configuration of DDC (EDID) data ................................................................................... 2-8
2.8 Inspection ............................................................................................................................. 2-12
2.8.1 Electric performance ................................................................................................ 2-12
2.8.1.1 Confirming the operation of operation SW .............................................. 2-12
2.8.1.2 Frequency change speed ........................................................................... 2-12
2.8.1.3 Confirming frequency range (Confirming preset timing) ....................... 2-12
2.8.1.4 Confirming automatic adjustment function .............................................. 2-12
2.8.1.5 Confirming composite sync. signal ........................................................... 2-12
2.8.1.6 Confirming Sync. On Green signal ........................................................... 2-12
2.8.1.7 Confirming digital input .............................................................................. 2-12
2.8.1.8 Confirming D-SUB input connector .......................................................... 2-12
2.8.1.9 Confirming power management function ................................................. 2-13
2.8.1.10 Isolation voltage ........................................................................................ 2-13
2.8.1.11 Ground resistance ..................................................................................... 2-13
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