NEC DLP CINEMA NC1600C, Service Manual

Page: 200 / 382

“Confidential, Do Not Duplicate without written authorization from NEC.”
7-37
ADJUSTMENTS AND INSPECTIONS ATTRIBUTABLE TO THE REPLECEMENT OF ELECTRICAL AND OPTICAL PARTS
Replacement of the standby power supply
Picture quality check
1) DVI input terminal check
1
Connect the DVI-A terminal with a digital RGB signal generator through a DVI-D cable.
2
Change over the projector title to Macro Key "3" (DVI-A).
3
Display the Ramp signals to confirm the freedom from gradation skip, coloring, and others.
4
Display SMPTE patterns and others to confirm the freedom from jitter, coloring, etc.
5
Change the connection to the DVI-B input terminal of the projector.
6
Change over the projector title to Macro Key "4" (DVI-B) and make confirmation for Items
3
to
4
.
2) HD-SDI input terminal check
1
Connect the SDI-A terminal with an SDI signal generator through a BNC cable (5C-FB).
2
Change over the projector title to Macro Key "1" (SDI-A).
3
Display the Ramp signals to confirm the freedom from gradation skip, coloring, and others.
4
Display chart patterns and others to confirm the freedom from jitter, coloring, etc.
5
Change the connection to the SDI-B input terminal of the projector.
6
Change over the projector title to Macro Key "2" (SDI-B) and make confirmation for Items
3
to
4
.
3) 3D display functional check with dual HD-SDI input signals
1
Connect the SDI signal generator to the SDI-A terminal and the SDI-B terminal through the BNC cable
(5C-FB).
In this case, both input terminals shall be connected, without fail.
2
Change over the projector title to “3D TEST SDI AB.”
3
Display the signals specified below, and confirm that there is no problem like freeze of images, gradation
skip, coloring, noise, etc.
Signal Format
Port Protocol Source Format Vertical Rate Scan type Color Space
SMPTE 274M 1920 x 1080 24/23.98 [HZ] Progressive YPbPr
Signal Pattern
Mono scope SDI Check-field
Ramp Shadow Ramp