Philips PM3208 Service Manual page 74

20 mhz dual channel oscilloscope
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a
+12V
+5V
R407
CN4O1
R401
:
1
1
401
aco2
BL Nie {
U7]
TOROS
TSABABE
[TRIGGER GENERATOR |
GENERATOR
FROM CN102
2
2
R406
5
+12V
:
D401
R440
(PV
oe
Rost
;
o
33
OL14
VR414
can
540
jai
Dae
(3
L) kia
-12v
EXT INPUT
+12V
ape
LINE TRIG. SIGN
BNC
| LINE
TRIG
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R412
0403
Riki
ROM
P2003
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CN4G2
-
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gree
D437
X-DEFL
CH2
sore
HZ5C.2
FROM S602
=
x-cEnTRE [7
TO P203
ALT CHOP
EXT
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FROM S602
- LEXT gg
=|R410
gars
SOURCE
=
a
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BIRL18
on
104
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50Vv
9
COUPLING
SLOPE
0409
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FSABL2D 7SAB60D
LEVEL
RVLé1-0
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~12V
veka
HOLD OFF CONTROL
TO R624
(MTB
GEN)
CN403
Ce
ae
jw
HOLD
OFF
Figure
10.8 Circuit diagram
of trigger generator
10-18
a
CN404
RL23
1
1
5
>
TO CN6O2
;
Pd
+5V
|
a}rese
+5V
R431
(ye
OLi2
2SA1015Y
C441
peas
10p
Sov
IC £01
SN74LSOON
1C401
PREC SDON
(C401
SN74LSOON
4
i; 6
TO C601
181588
TV-V/H
FROM $602
+5V
1C401
SN74LSOON
MAT3589
890428

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