Service manual

6). Contrast and Brightness Recall :
Press   and   buttons simultaneously, and the contrast and brightness will restore the factory defaults.
7). Test Mode(720*400)/Graphic Mode (640*400) exchange :
Press   and   buttons simultaneously.
Test Condition
Before function test and alignment, each LCD Monitor should be run-in and warmed-up for at least 30 minutes with the
following conditions:
a). In room temperature,
b). With full-white screen, R.G.B. Black
c). With cycled display modes,
640*480 (H=43.27kHz, V=85Hz)
800*600 (H=53.7kHz, V=85Hz)
1024*768 (H=68.67kHz, V=85Hz)
1280*1024 (H=79.97kHz, V=75Hz)
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ViewSonic Corporation
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Confidential – Do Not Copy
VP171/b/s
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