Philips PM2517E Service Manual page 78

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( a d i n o . 5 a n d 4 )
D i s p l a y
:45mV instead ol 90mV
ol 900nrv
(= t,x supplied voltage)
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t s = d . a r n V 1 0 l / V l 0 l
m e a s L r r e w r l h Q - m e t e r
n r [ 4 4 r a n q e ( P M 2 5 0 3 )
S h o r l c r c L r l A D C , n o r l
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M e a s u r e m e n t N 4 e a s u r i n g p o i n t s
lvleas u n ng data
C o r r e c t l n c o r r e c t
I n p u l o l A D C
s w l c h n g p a r t 0 0 0 0 6 0
{ a r 0 1 )
H i = a r 0 1 / 1 2
2 6 V
- 3 2 V
B o t h s r q n a s s h o u l d
D e i e c l O 0 0 0 6 0
B
C h e c k C 1 0 4 C 1 0 5 .
c r 0 6
c r 0 4 c 1 0 5 . c t 0 6
C l 0 5 = 3 9 0 p f
C 1 0 6 = 3 9 0 p i
R e l e r l o C
R e p a r e c a p r c r o r s
C B r e f O 0 0 0 6 4
( A r 0 2 )
H i - A 1 0 2 / l 4
W r t h o s c o s c o p e
O s c r 1 a t o n s
c h e c k c 1 1 0 ( 4 n 7 )
F e f e r t o D
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+ 1 2 0 ! A
E 0
C h e c k R 1 0 5 . R 1 0 6
R 1 0 7 , R r r 3
F 1 0 5 , R 1 0 6
R 1 0 7 . R 1 1 3
R 1 0 5 = t 0 k 2
R 1 0 6 = 2 k 2 p o t e n l i o m e t e r
9 k 5 3
1 6 k 2
D e f e c l O O 0 0 6 4
G
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( 4 r 0 1 )
C h e c k C 1 0 1 a n d l r a c k s
H = 4 1 0 1 i 2
c 1 0 l
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8 0 k H z . . 1 0 0 k H z
C 1 0 1 = l n F -
D e l e c l O 0 0 0 6 0
D e i e c l O 0 0 0 6 0
F e i e r t o c
R e p l a c e t o C l 0 1
N o . From
Ny'easurernent
l V e a s u r i n g p o i n t s
l v l 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 l
D i s p l a y
I n p u l v o l l a g e ;
+ 3 0 m V s u p p l r e d 1 0
A D C
H r = R 1 0 8 f i g h l h a n d
S e i € c l ; R a n g e 9 9 9 . 9 m V
O n d i s p a y
300 OmV
D e f e c t 0 0 0 0 6 4
F e f e r t o B
R e p l a c e V 1 0 2
I I A D C r s s t r n o l I n e a .
D e l e c l 0 0 0 0 6 0