NEC LCD1550X-BK, Service Manual

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2-4
2.5 PWB, mechanism and appearance inspection
2.5.1 Visual and conductivity check
(1) There should be no cracks, remarkable contamination or solder faults on the PWBs.
(2) There should be no remarkable lifting or inclination of the parts on the PWBs, and the parts should not be in
contact with other parts.
(3) There should be no short-circuit across the power supply and GND on the PWBs.
2.5.2 Mechanism and appearance inspection
(1) All connectors, receptacle pins should be clamped firmly and fully inserted.
(2) Lead wires should not be pressed against any edge of metal parts.
(3) Lead wires should not be in contact with high temperature components.
(4) Metal parts should have no scratch, remarkable stain, dent or bend.
(5) Liquid crystal display should not be scratched or contaminated.
(6) There should be no abnormality with the front switch operation.
(7) There should be no wave patterns seen on the liquid crystal panel when the front switch is pressed.
(8) The picture position and picture inclination should satisfy the following specifications.
* Check if the picture position is within the following specification (with white frame pattern).
* Check if the picture inclination is within the following specification (with white frame pattern).
Display area
L1
L2
L3
L4
BEZEL
L1 0mm
L2 0mm
L3 0mm
L4 0mm
Display area
H1
H2
BEZEL
H3
H4
H1(h1) 0mm
H2(h2) 0mm
H3(h3) 0mm
H4(h4) 0mm
h2
h3
h1
h4