Inspection ----------------------------------------------------------------------------- - NEC MultiSync LCD1970NX Service Manual

INSPECTION
TABLE OF CONTENTS
1. General Description ------------------------------------------------------------------------------------------ 5-2
2. Electrical Characteristics ------------------------------------------------------------------------------------ 5-3
2.1 Power Supply --------------------------------------------------------------------------------------------- 5-3
2.2 LCD Panel ------------------------------------------------------------------------------------------------- 5-4
2.3 85Hz Refresh Rate Support --------------------------------------------------------------------------- 5-4
2.4 White Color Temperature ------------------------------------------------------------------------------- 5-4
2.5 Check Power Manage Function ---------------------------------------------------------------------- 5-5
3. External Inspection on the LCD Module ---------------------------------------------------------------- 5-6
3.1 Inspection Conditions ----------------------------------------------------------------------------------- 5-6
3.2 Electrical Inspection Specification -------------------------------------------------------------------- 5-6
3.3 Polarizer Defects ----------------------------------------------------------------------------------------- 5-9
3.4 Foreign Material ------------------------------------------------------------------------------------------ 5-9
3.5 Line Defect ------------------------------------------------------------------------------------------------- 5-9
3.6 Bezel Appearance --------------------------------------------------------------------------------------- 5-9
4. Safety Test ------------------------------------------------------------------------------------------------------ 5-10
4.1 Input Current Measurements -------------------------------------------------------------------------- 5-10
4.2 Power Source/Earth Connections -------------------------------------------------------------------- 5-10
4.3 Dielectric Strength Test --------------------------------------------------------------------------------- 5-11
4.4 Leakage Current Test ----------------------------------------------------------------------------------- 5-11
4.5 Insulation Resistance Test ----------------------------------------------------------------------------- 5-12
5. PLUG & PLAY Communication Inspection ------------------------------------------------------------- 5-13
5.1 System Connection -------------------------------------------------------------------------------------- 5-10
5.2 Input Signal ------------------------------------------------------------------------------------------------ 5-14
5.3 Programs --------------------------------------------------------------------------------------------------- 5-14
5.4 Operations ------------------------------------------------------------------------------------------------- 5-15
5.4.1 EDID Data Inspection and Writing to the D-SUB Connector (Analog) ----------------- 5-15
5.4.2 EDID Data Inspection and Writing to the DVI-D Connector (Digital) ------------------- 5-18
5.5 EDID Data File -------------------------------------------------------------------------------------------- 5-19
Appendix Reference Signal Timings ---------------------------------------------------------------------- 5-20
5-1
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