Philips Brilliance 170P6EB/93, Service Manual

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104
190P6&170P6 LCD
GENERAL PRODUCT SPECIFICATION
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8639 000 16198
BRAND
:PHILIPS
19 inch LCD Monitor
TYPE :190P6ES/00
2005-02-05
2005-02-05
29
Thomas chen
590 23
8. 0 US B 2 . 0 H ub
The US B h ub sha ll b e se lf - p o w ere d by the interna l p o w er s upply o f the monitor . The
comm u nication p rotoco l sha ll com ply w ith US B s p eci f ication re v ision 2 . 0 . A sin gl e
up stream connector sha ll ser v e as connection to the CPU or other US B h ub. Each o f the
4 d o w nstream p orts sha ll inc lud e c u rrent- l imite d p o w er o f 5 V DC at 500mA f or u se by an attache d
d e v ice .
US B Si g na l s
US B si g na l s sha ll meet the timin g an d si g na l l e v e l stan d ar d s f or hi g h s p ee d d e v ices set f orth by
in du str y stan d ar d US B s p eci f ication re v ision 2 . 0 . Each d o w nstream p ort sha ll p ro v i d e 5 V DC at up to
500mA f or u se by an attache d US B d e v ice .
Comm u nication Protoco l
US B connections sha ll b e esta bl ishe d v ia 4-con du ctor US B ca bl es . US B ca bl es m u st b e
shie ld e d in accor d ance w ith the US B s p eci f ication f or hi g h s p ee d d e v ices .
Protoco l Parameters
The US B h ub an d associate d p orts sha ll b e com pl iant w ith the US B s p eci f ication f or
hi g h s p ee d d e v ices . The US B d e v ice s p ee d sha ll b e 4 8 0 M b it / sec . The ma x im u m p o ll in g rate sha ll
b e e v er y 25 6 ms .
9 . 0 Smart B ri g ht
Set Smart B ri g ht f eat u re on ( re f er to 3 . 2 . 3 ), the monitor sha ll b e a bl e to d etect
am b ient lu minance an d a dju st its b ri g htness to p ro p er v a lu e accor d in g to the intensit y
o f the am b ient lu minance . B ri g htness w i ll b e a dju ste d hi g her in l i g ht en v ironment an d a dju ste d l o w er
in d ar k en v ironment . Am b ient lu minance chan g e m u st remain stea dy
f or at l east 4 secon d s f or this f eat u re to start to a dju st monitor s b ri g htness ; in or d er to
a v oi d u nnecessar y b ri g htness chan g e du e to s w i f t or ran d om am b ient lu minance
v ariation .
10 . 0 Re l ia b i l it y
10 . 1 Mean Time B et w een Fai lu res
S y stem MT B F ( E x c lud in g the LCD p ane l an d CCFL ) : 50 , 000 hrs
CCFL MT B F: 30 , 000 hrs ( 50 % o f ori g ina l b ri g htness )
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