LG RD-JT40 1024X768 XGA, Руководство по обслуживанию, Страница: 30 / 90

LG RD-JT40/41 Service Manual
30
3. Main Board Trouble Shooting Guide
S y s t e m n o w o r k
a . I C 2 0 1 b a d s o ld ie r in g
b . F la s h ( I C 2 0 1 ) w it h o u t s o f t w a r e in s id e .
c . I C 6 0 7 ( R e s e t I C ) f u n c t io n a b n o r m a l
d . I C 9 0 1 n o w o r k .
a . C h e c k I C 6 0 9 ( 3 . 3 V ) o r I C 6 1 0 ( 2 . 5 V )
b . C h e c k M C L K a n d D C L K
N o d a t a s ig n a l
o u tp u t t o D M D B D
T h e im a g e d is p la y
" N o S ig n a l" w h e n
t h e in p u t is P C
T h e g h o s t I m a g e
d is p la y o u t p u t o f
V id e o in p u t
C o u ld n 't d o w n lo a d
n e w s o f t w a r e t o
M ia n B D
R e m o t e m o u s e
d o n 't w o r k
K e y p a d w o r k in g
a b n o r m a lly
a . I C 9 0 1 b a d s o ld ie r in g c a u s in g I C 9 0 1 n o w o r k .
b . C h e c k I C 6 0 9 ( 3 . 3 V ) o r I C 6 1 0 ( 2 . 5 V ) .
c . C h e c k I C 2 0 3 , I C 2 0 2 if t h e r e w a s M C L K a n d D C L K
o u tp u t t o I C 9 0 1 .
Y e s
a . C h e c k t h e m o u s e o f P C is s t ill w o r k in g n o r m a lly
b . C h e c k t h e m o u s e d r iv e r o f P C is P S 2 c o m p a t ib le
m o u s e
c . R e p la c e I C 8 0 2
a . R e p la c e I C 6 0 2
b . I C 9 0 1
a . C N 6 0 5 b a d s o ld ie r in g
b . I C 9 0 1 b a d s o ld ie r in g
c . A v b o x a n d M a in B D b a d c o n n e c t io n
a . C h e c k t h e v o lt a g e o f I C 5 0 2 , I C 5 0 3 ( 3 . 3 V ) ,
I C 5 0 1 ( 3 . 3 V ) , B C 5 3 7 ( 3 . 3 V )
b . if v o lt a g e a b o v e a r e O K , t h e n c h e c k
I C 6 1 1 ( V S Y N C ) a n d I C 6 0 6 ( H S Y N C ) if t h e r e w e r e
t h e s e tw o s ig n a l o r n o t .
c . R e p la c e I C 5 0 2
Y e s
Y e s
Y e s
Y e s
Y e s
C h e c k I C 6 1 3
C h e c k t h e r e s is t e r s b e t w e e n I C 5 0 2 a n d I C 9 0 1
( R P 5 0 1
R P 5 1 2 )
a . C h e c k s o ld ie r in g c o n d it io n o f R 6 9 2 .
b . I C 9 0 1 b a d s o ld ie r in g
C h e c k I C 6 1 2
L a m p L it s ig n a l
a b n o r m a l
I R d o e s n 't w o r k .
G r a y b a r a b n o r m a l o r
im a g e c o n t o u r ( P C in p u t )
Y e s
Y e s
Y e s
Y e s
N o
N o
N o
N o
N o
N o
N o
N o
N o