ViewSonic N2750w-2G, Service Manual

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SENSITIVITY is normal.
H. Adjustment attenuator, If the critical point of the change of the image signal to
noise ratio is under LEVEL<=60dBu,regards as normally.
1.4.12.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.
A. AV: Video cable (Yellow), Audio cable (Left (White), Right (Red) sound track).
B. S-Video: S-Video signal cable (White), Audio cable (Left (White), Right (Red)
sound track).
C. HD (Ypbpr/YcbCr): brightness signal cable (Green), Component signal cable (Red,
Blue), Audio cable (Left (White), Right (Red) sound track).
D. SCART1: 21Pin SCART signal cable (Black).
E. SCART2: 21Pin SCART signal cable (Black).
1.4.13.VIDEO/AUDIO OUTPUT TEST:
A. SCART/AV output: A 27” LCD TV in AV pattern, inputs the CVBS signal; the
output meets SCART, SCART connects another 27” LCD TV which is in SCART
pattern, Examines two 27” 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.
B. Under any pattern except PC pattern, The Audio output meets active extra speaker,
examines whether the extra speaker makes the sound.
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27
50w-
2G
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