Acer AL2016, Руководство по обслуживанию

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Acer Service Manual
5. AL2016W backlight can’t be turned on(INL inverter)
N o R aster
Y e s
C he c k pow e r boa r d N O
Y e s
I s the r e 14V volta ge on
pin13 of I C 501?
N O F 501 ope n
LED G r e e n?
Y e s
Y e s
C he c k I C 501- pin8 volta ge
is H igh- le ve l volta ge
N O
C he c k R 509, R 511, C 519
a r e ok
N O
Y e s
C ha nge R 509, R 511,
C 519
C he c k I /F boa r d Y e s
C he c k I C 501- pin7 volta ge
is P W M pulse w a ve
C he c k C N 501~ C N 504 a r e
O K
Y e s
N O
R e sta r t c onne c t the
la m p w ir e
C he c k pr ote c tion c ir c uit
Q 501, Q 502 a r e ok
N O C ha nge Q 501, Q 502
C he c k U 501, U 502, U 503,
U 504 a r e O K
N O
C ha nge U 501, U 502,
U 503, U 504
Y e s
N O
C he c k R 501, R 508 a nd
C 515 a r e ok
N O
Y e s
C ha nge R 501, R 508,
C 515
C he c k I /F boa r d
C he c k I C 501- pin12
volta ge is 5.0V
N O
I C 501 f a il, c ha nge
I C 501
Y e s
EN D
Y e s
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