No Led Lighted; Only Indication Led's Are Lighted; Indication Led Main Is Not Lighted - Philips PM2517E Service Manual

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6.2. DISPLAY
l v l e a s u r i n g p o i n t s
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L
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L -
t
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t
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D i s p l a y
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6 . 2 . 1 . N o L E D L i g h t e d
N o . F r o m
l\y'easurement l v l e a s u r i n g p o i n t s
M e a s u r i n g d a t a
C o r r e c t
I n c o r r e c t
S u p p l y v o l l a g e
H i = C 8 0 4
( + )
H r = C 8 0 2
,
( - )
+ 8 V
. + 9 V
- 8 V - 9 V
Check power.
s u p p r y
R e f e ( t o 6 . 1 . 1 .
6 . 2 - 2 . O n l y i n d i c a t i o n L E D ' s a r e l i g h t e d ( + , - , M A N , M O , m v a )
N o .
F r o m
M e a s u r e m e n t M e a s u r i n g p o i n t s
M e a s u r i n g d a t a
C o r r e c t I n c o r r e c t
S r r p p l y v o i t a g e H i = c 8 0 4 ( + )
H r = C 8 0 2 ( - )
+ 8 V . . + 9 V
, 8 V - 9 V
R e f e r t o B
C h e c k p o w e r
s u p p v
F e i e r t t o 6 . 1 1
L E D s a r e s u p p e d
l r o m t h e b a t t e r e s
B
B l a n k d r s p a y H i = D 7 0 l / 4 L o g c 1 = d r s p a y ( 0 V )
L o g r c 0 = b l a n k d i s p a y
( - 8 5 v )
C h e c k D 7 0 1 C h e c k d s p a y
6.2.3. Indication LED IVIAN is not liohted
M e a s u r e m e n t l \ y ' e a s u r i n g d a t a
I n c o r r e c l
n m a n u a l r a n q r n q
N o L E D M A N
r q n r e o
- V s u p p l y s
B e { e r i o 6 . 1 1
6.2.4. One 7. segmenl is lighted very bright
N o . F r o m
i\,,leasurement
N 4 e a s u r i n g p o i n t s
l V e a s u r i n g d a t a
C o r r e c t t n c o r r e c t
S u p p l y v o l l a g e H i = c 8 0 4 ( + )
H r = C 8 0 2
( - )
+ 8 V + 9 V
8 V
- 9 V
B e f e . l o I
C h e c k p o w e r .
R e f e r t t o 6 l l
B
C o c k s r g n a O Q 0 0 6 0
( 4 1 0 1 )
H i = A 1 0 1 r 2
W i l h o s c r l l o s c o p e
n n n n 0
8 0 k H z . . 1 2 0 k H z
R e i e f t o C
c
B
Su pply vollage ()1
oo0060
( 4 1 0 1 )
H : 4 1 0 1 / 1 3 ( + )
H r = 4 1 0 1 / 1 (
)
L o = 0 . s o c k e t +
+ 8 V
- 8 V
8 V
. - 9 V
R e l e r t o D
D C D a t a s r q n a l O O 0 0 5 9
( D 1 0 1 )
H l = D 1 0 1 / 1 4
a . O p e n n p u t
( V a n d 0 )
b . S h o r t c r c ! i t i n p u l
( V a n d 0 )
W l l h o s c i l l o s c o p e
a . B o c k s r q n a l v a r y r n g
w r l h I n p u t s r g n a l
b B l o c k s r g n a i , / : x
c l o c k s g n a 0 0 0 0 6 0
L o g i c 0 = - 8 5 V ,
L o g r c 1 = 0 V
R e t e r t o E N o s i q n a
T o o s m a l l s i g n a I
1 2 0 0 m V l
D e t e c l O 0 0 0 5 9
E D V o l l a q e o v e r C 1 0 1
( o 0 0 0 6 0 . A r 0 1 )
H i = a 1 0 1 / 4
l . r i = A t 0 1 / 5
5 6 V :
D e { e c t O 0 0 0 6 0