V-Ranges; Oscillating Between Two V Ranges; D A T A H O L D - Philips PM2517E Service Manual

7 8
6.5.4. Oscillating between two Vtu ranges
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6 . 6 .
V- RANGES (ATTN + AC/DC CONV,)
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t
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t
t
E
I
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E
N o . F r o m M e a s u r e m e n t
l \ 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 t a
C o r r e c t
l n c o r r e c t
S i g n a D H
O O 0 0 5 9
( D 1 0 1 )
H i = D 1 0 r / 1 8
S w i t c h f r o m o n e V t u
l o a n o l h e r V & r a n g €
w r t h t h e m a n u a l r a n g e
p u s h b u t i o n s
o
l-----l
.J t-
- 8 . 5 V
Pl]lse ot 200rnsec
C h a p t e r 6 . l 3
D A T A H O L D
R e l e r l o I
I
C h e c k R l 1 8 . C 1 0 9 F ] 1 8 C r 0 9
F r 1 8 = 2 [ , 4 2
Cl09 = 220nF
R e l e r l o C
c
B
S i g n a l D H O Q 0 0 5 5
( D 7 0 3 )
H t = D 7 0 3 / 1
S w i l c h l r o m o n e V -
t o a n o l h e r v t u r a n g e
! ! l h t h e r n a n u a l r a n g e
oJ-----L
- 8.5V
200rnsec
C h e c l F r r T a n d t r a c k s R e l e r 1 0 D
D
c
F a n g e s w , r c h n g
D r s p l a y
S w r t c h r a n g e s w l l h t h e
m a n u a r a n g - a
C h e c k f l h e d e c m a l
p o n i i s c h a n q i n g
D e l e c t O 0 0 0 5 5 R e i e r 1 o 6 . 5 . 3 .
D e c m a p o n l
6 . 6 . 1 . D i s p l a y c o n s t a n t 0 0 0 0
N o . F r o m
M e a s u r e m e n t
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
Correct I n c o r r e c t
I n p u t s r g n a l
c 3 0 1 / R 3 0 1
S e l s c l ; R a n g e t V -
Ä r a n u a r a n g n g
S u p p l y ; : 0 5 V ! ( V a . O )
l s l h e r e a s g n a l
R e l e f l o B
N o s l g n a l
C h e c k C 3 0 1 ,
S e l e c t o r s w i t c h
B
S i g n a l V i n l o t 0 0 0 0 6 1
( 4 3 0 1 )
H i = 4 3 0 1 1 3
S e l e c t ; R a n q e V -
M a n u a l r a n g i n g
S u p p l y : : 0 . 5 V t u ( V O O )
:0.5V:10
F e i e r t o C
-
N o s r q n a l
-
: 1 0 0 0 s r g n a l
c
B
B
N o s g n a
: 1 0 0 0 s i q n a
S u p p l y : 9 0 0 m V , l k H z
r o 4 3 0 ' 3
H i = 4 3 0 1 i 3
S e l l i n g s ; r e f e r i o B
D s p l a y ?
: 0 . 5 V : 1 0 0 0
0 r s p l a y
0 e l e c t A 3 0 l
T r a c k s h o r t c r r c L r t
R e l e r l o D
N o d r s P l a y
D e i e c l F 3 0 1 / R 3 0 2
D
E
c
D
C h e c k t r a c k
R 3 1 5 , V 3 0 1 1 V 3 0 2
G a l e v o l l a g e V 3 0 1 / V 3 0 2
R 3 r 0
v30ri v302
H r = g a l e V 3 0 1 / V 3 0 2
S e l e c l ; F u n c t o n V -
l v l a n u a l r a n q i n g
R a n g e
t v
1 0 v
1 0 0 v
1000v
L O g r c
0
0
l
l
L o q i c 0 = - 8 . 5 V
R e f e r t o E
D e f e c l V 3 0 l
E
S i g n a l R N G I o r F 3 1 4 H = R 3 l 4 r i g h t
S e l e c t ; F u n c l i o n V t u
M a n u a l r a n g i n g
S e e E
R e i e r t o G