NEC NEC MultiSync LCD1550X LCD1550X LCD1550X, Service Manual

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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