Service manual

1.4.8.VIDEO RECEIVING TEST:
AV receives supply oscillator: AV/S-Video/HD/SCART1/SCART2/SCART-SV are from
DVD to LCD TV; Examines whether has the image and the sound and is normal.
(1). AV: Video cable (Yellow), Audio cable (Left (White), Right (Red) sound track).
(2). S-Video: S-Video signal cable (White), Audio cable (Left (White), Right (Red) sound
track).
(3). HD (Ypbpr/YcbCr): brightness signal cable (Green), Component signal cable (Red,
Blue), Audio cable (Left (White), Right (Red) sound track).
(4). SCART1: 21Pin SCART signal cable (Black).
(5). SCART2: 21Pin SCART signal cable (Black).
1.4.9.VIDEO/AUDIO OUTPUT TEST:
(1). SCART/AV output: A 32” LCD TV in AV pattern, inputs the CVBS signal; the output
meets SCART, SCART connects another 32” LCD TV which is in SCART pattern,
Examines two 32” LCD TV whether demonstrates the same image. But their sound
doesn’t mutually affect, Must respectively adjust volume to examine sound. AV output
test method is in the same way.
(2). Under any pattern except PC pattern, The Audio output meets active extra speaker,
examines whether the extra speaker makes the sound.
1.5 Compatible Mode Table
All timings must be properly PHASED, SIZED, and CENTERED.
Aspect Ratio=Resolution to which the native signal is SCALED and CENTERED
1:1=Centered,1:1 Pixel Correlation, No Scaling. No Filtering, Image must be properly phased.
Full Screen=The Input timing is scaled to full screen, regardless of scaling artifacts.
=>640*480
N/A=Not Applicable to a green timing.
MODE
CVBS SVHS YCBCR
(scart CVBS)
YPBPR
(scart RGB)
RGB
(D-Sub)
HDMI
(HDCP)
TV
RF(Analog)
NO NO NO NO NO NO YES
576i
YES YES YES YES NO YES NO
576p
NO NO NO YES NO YES NO
HD 720p
NO NO NO YES NO YES NO
HD 1080i
NO NO NO YES NO YES NO
640*480@60Hz
NO NO NO NO YES YES NO
640*480@75Hz
NO NO NO NO YES YES NO
800*600@60Hz
NO NO NO NO YES YES NO
800*600@75Hz
NO NO NO NO YES YES NO
1024*768@60Hz
NO NO NO NO YES YES NO
1024*768@75Hz
NO NO NO NO YES YES NO
1280*720@60Hz
NO NO NO NO YES YES NO
1280*768@60Hz
NO NO NO NO YES YES NO
1360*768@60Hz
NO NO NO NO YES YES NO
1280*1024@60Hz
NO NO NO NO YES YES NO
Chart 3. Mode Compatibility Table---N3250W(G)
12
ViewSonic Corporation Confidential
-
Do Not Copy N3250w-G