E H T P R O B E P - Philips PM2517E Service Manual

7 9
G
C h e c k R 3 1 4 a n d l r a c k s
D e l e c l V 3 0 1 i V 3 0 2
H S i g n a i R N G B o n D l 0 1 H i = D 1 0 1 / 7
S e l e c t ; F u n c l i o n V -
M a n u a l r a n g r n g
S e e E
R e t e r t o 6 . 5
F a n g i n g e r r o r s
B S i g n a l V i n 2 0 0 0 0 6 1
( 4 3 0 1 )
H i = a 3 0 r / 1 5
S 6 l e c l ; R ä n g e 1 V -
M a n u a l r a n g i n g
0V-
D e i € c l V 3 0 2
C o n l r o l o i V 3 0 2
S i g n a l l o u t 0 0 0 0 6 l
( 4 3 0 1 )
H l = 4 3 0 1 / 1 1
S e l e c t ; R a n g e 1 V -
M a n u a l r a n g i n q
D e f e c l R 3 1 3
S e e c l o r s w l c h
T r a c k s
N o v o l a g e
F e s s t o r s R a a n d F b
o 0 0 0 6 1 ( A 3 0 r )
R307
= Ra
R308, R3l6 = Rb
Q meter
=3ka
=30k4
D e { e c t R 3 0 7
F 3 0 8 o r R 3 1 6
L S i g n a l A Z c 0 0 0 0 6 1
( 4 3 0 1 ) o t 1 5 ! F i n p a r a l e l l l o
c 3 0 3 1 4 3 0 1 / 6 / 7 )
D i s p l a y c o r r e c t a g a i n
w h e n m e a s u f l n g
D e f e c t C 3 0 3
T r a c k s
D e i e c t 4 3 0 1
6.6.2. Display will nol become zero with VQ/O short circuited (Vru lunction)
N o .
From
M e a s u r e m e n t N y ' 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 l a
C o rrect
l n c o r r e c t
R i p p l e o n p o w e r s u p p l y
o i 0 0 0 0 6 1 ( A 3 0 1 )
F l : a 3 0 r / 1 2 l 5 + 8 5 V
S e l e c l ; F u n c l i o n V - ,
A U T r a n g i n g
S h o r t c r r c u i l V a l o
W i t h o s c r l l o s c o p e
< 5 m V
R e l e r l o I
POWER SUPPLY
6 . 1
B
S i q n a l s V n 1 a n d V i n 2
0 0 0 0 6 1 ( A 3 0 1 )
H i = 4 3 0 1 / 3 ( V r n l )
H i = 4 3 0 1 / 1 5 ( V i n 2 )
S € l e c t ; F u n c l i o n V -
A U T r a n g i n g
S h o d c i r c u i t V Q / o
< 1 C , n V
Both signals should be
R e l e f ( o D
R e f e r l o C
C I Check R306 and R309
T r a c k i n t e r r u p l o n
R306, R309
F306 = 200k
R309 = 237k
D e l e c l 4 3 0 1 R e p a i r
D
I D i o d e r n e a s u r e m e n l
b e t w e e n A Z c I n p u t s
o f 0 0 0 0 6 1 ( A 3 0 1 )
H i = 4 3 0 1 i 6
L o = 4 3 0 1 / 7
S e l e c l ; F u n c t i o n V !
A U T r a n g i n g
S h o r t c i r c u i l V Q / 0
=0.6V
R e l e f l o E D e f e t C 3 0 3
T r a c k s h o r l c i r c u i t
E
D
R e s i s l o r s R a a n d R b
0 0 0 0 6 1 ( A 3 0 1 )
R307
= Ra
F 3 0 8 , R 3 1 6 = R b
S e l e c l ; F u n c t i o n V -
A U T r e n g i n g
S h o r l c i r c u i t V a / o
: 3ka
:30k4
E SrgnaL lout 000061
(4301)
H = 4 3 0 1 / 1 1
I n s l r u m e n l s w r t c h e d o l l
Q m e t e r
: 1 0 k w h e n F l 3 1 l i s
= 7 k 5 w h e n R 3 1 1 i s
f i t t e d
D e f e c t A 3 0 1
C h e c k ; R 3 l 0 / F 3 1 1
a n d R 3 1 2
T r a c k s
6.6.3. Adjustmenls cannot be made (Adj. no. l0)
N o .
From
lVeasurement
M e a s u r i n g p o i n t s N 4 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 i g n a l V i n l O Q 0 0 6 1
( 4 3 0 1 )
H i = A 3 0 1 / 3
S € l e c l ; F u n c l i o n V -
A U T r a n g i n g
Supply; gvtu io Va/o
M e a s u r e d w i l h P M 2 5 2 4
6 8 5 m v t u . . . 6 9 9 m v t u R e f e r l o E R e f e r 1 0 I
a
D r a i n V 3 0 1 H i = v 3 0 1 d r a i n
I n s t r u m e n t s e l t i n g s ;
M e a s u r e d w l l h P M 2 5 2 4
0 , 2 0 l o l o w e r a s v a l u e
m e a s u r e o u n d e r A
R e f e r t o D R e t e r l o C
a V o l a g e = : o v r
b V o l l ä g e = : 5 0 0 6
l o w e r a s r n e a s u r e d