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GENERAL NOTES
A. Use s c h e m a tic d ia g r a m s , th e o v e r o l l b lo c k
d ia g ro m > c i r c u i t b o a rd I l l u s t r a t i o n s ) ond
c i r c u i t d e s c r i p t i o n s when o n o ly z ln g in s tr u m e n t
m a lf u n c t io n s a n d l o c a t i n g t e s t p o i n t s .
The
s c h e m a tic d ia g ra m s in c lu d e t y p i c a l w a ve fo rm s
ond v o l t o g e s t h a t o r e in te n d e d os on o l d
i n t r o u b le s h o o t i n g .
B. A lw a y s s e t th e POWER s w i t c h t o OFF ond u n p lu g
th e l i n e c o r d b e f o r e s w o p p in g , r e m o v in g , o r
r e p l a c i n g c o m p o n e n ts , ond b e f o r e c o n n e c tin g o r
d is c o n n e c t in g in s tr u m e n t le a d s ond c a b le s .
C. When a n a ly z in g c i r c u i t m a lf u n c t io n s , c o n s id e r
c o n n e c to r s and c o b le s os p o s s i b le c a u s e s o f
f o l l u r e .
SPECIFIC NOTES
1. S e t i n i t i a l f r o n t - p a n e l c o n t r o l s a s f o ll o w s
POWER S w itc h
ON ( b u t t o n i n )
A INTENSITY
M id ra n g e
FOCUS
M ld ro n g e
V e r t i c o l POSITION
M id ra n g e
VERTICAL MOOE
CH 1
CH 1 VOLTS/OIV
0 .1 V
CH 1 VO LTS/D IV V o r l a b le
C o l d e t e n t
CH 1 I n p u t C o u p lin g
GND
H o r i z o n t a l POSITION
M id ra n g e
HORIZONTAL MODE
A
A SEC/OIV
0
.1ms
A SEC/OIV V a r i a b le
C o l d e t e n t
X I 0 M o g n i f l e r
O f f (k n o b i n )
A TRIGGER Mode
P -P AUTO
A4B INT
VERT MODE
A SOURCE
I NT
V e r i f y th e lo w - v o lt o g e p ow er s u p p lie s o t th e
f o l l o w i n g t e s t p o i n t s :
SUPPLY
TEST POINT
TOLERANCE
♦ 5 .2 V
W968
5 .0 4 t o 5 .3 6 V
+ 8 .6 V
W960
8 . 4 3 t o 8 .7 7 V
- 8 .6 V
TP961
- 8 . 5 6 t o - 8 .6 4 V
+30V
W956
2 9 .1 t o 3 0 .9 V
♦100V
W954
97 t o 103V
NOTE
A HV p ro b e 18 r e q u i r e d to m easure th e - 2 k V s u p p ly .
T u rn o f f th e p o w e r and make th e t e s t e q u ip m e n t
c o n n e c tio n s t o th e o s c i l l o s c o p e .
S e t th e v o l t m e t e r
t o r e a d o t le o s t - 3 k V , th e n t u r n th e o s c i llo s c o p e
p ow er ba ck o n to ta k e th e r e a d in g .
A f t e r o b t a i n in g
th e r e a d i n g , t u r n o f f th e o s c i llo s c o p e p ow er to
d is c o n n e c t th e t e s t e q u ip m e n t c o n n e c t io n s , ond
r e p la c e th e c r t s o c k e t c o v e r .
V e r i f y th e -2 k V s u p p ly o t p i n 2 o f th e c r t s o c k e t .
The v o l t o g e s h o u ld be b e tw e e n -1 9 0 0 and -2 1 0 0 V .
3 .
WARNING
The P r e r e g u l o t o r o n d I n v e r t e r c i r c u i t s h o ve o f l o a t i n g
common r e f e r e n c e w i t h r e s p e c t t o c h o s s is g r o u n d .
A c - s o u r c e p o t e n t i a l i s p r e s e n t o n th e common r e f e r e n c e
p o i n t s .
C o n n e ct th e in s tr u m e n t to th e o c -p o w e r s o u r c e
t h ro u g h o n i s o l o t io n t r a n s f o r m e r t o p r e v e n t th e p o s
s i b i l i t y o f p e r s o n a l i n j u r y o r e q u ip m e n t damage when
t r o u b le s h o o t i n g th e s e c i r c u i t s .
When on o u t o t r a n s f o r m e r
i s a l s o u se d i n th e t r o u b le s h o o t i n g p r o c e d u r e , c o n n e c t
th e i s o l a t i o n t r a n s f o r m e r t o th e o c -p o w e r s o u r c e , th e n
c o n n e c t th e o u t o t r a n s f o r m e r to th e i s o l a t i o n t r a n s f o r m e r .
F i n a l l y , p lu g th e in s tr u m e n t p o w e r c o r d i n t o th e a u t o -
t r a n s f o r m e r o u t l e t .
* NUMBER INDICATES
SCHEMATIC DIAGRAM
Содержание 2215A
Страница 1: ......
Страница 9: ...2215A Service 4735 01 vi The 2215A Oscilloscope ...
Страница 138: ...2215A Service 4735 04 Figure 9 4 Basic block diagram ...
Страница 139: ......
Страница 145: ...CIRCUIT BCARD N TER CONNECTIONS 2 2 1 5 A 4755 20 ...
Страница 153: ...2215A S e rv ic e D UJ o C D GO CO in 10 CJ Figure 9 8 Circuit view of A1 Main board ...
Страница 157: ...1 p 2 m 3 p 4 p 5 P 6 p 7 p 8 p 9 A T B Z 2 I5 A ...
Страница 158: ...H T J t K t L t M T N T p t S 4 7JS Z2 ...
Страница 168: ...I 2 3 4 5 6 7 8 9 B H K L M N 2 2 I 5 A 473S Z ...
Страница 173: ...I 2 to 3 to 4 to 5 to 6 7 to 8 to 9 2 215A B TIMING ALTERNATE B SWEEP S ...
Страница 176: ......
Страница 181: ...I 2 3 4 5 6 7 8 9 AXIS CRT ...
Страница 184: ...2215A Service R240 DL C0MP1 C237 HF PEAK COMP R874 ASTIG R870 GEOM A1 MAIN BOARD ADJUSTMENT LOCATIONS 4735 31 ...
Страница 187: ...R652 DELAY END 4735 34 A 5 A L TE R N A T E SW EEP B O A R D A D J U S T M E N T L O C A T IO N S ...
Страница 189: ...2215A Service 4735 11 ...
Страница 193: ...3 ...
Страница 194: ...2215A SERVICE ...
Страница 195: ...4 7 5 ...
Страница 200: ......
Страница 202: ...2215A SERVICE ...
Страница 205: ...000 2775 00D ...