Tektronix 221 Instruction Manual page 67

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R662
R739
TP
-1000V
C735
8
\
c f
R661
R663
C734
C662
Q 660
R665
R664
0 664
R666
C656
U654
C663
C657
R557
R556
R735
V R 738
R734
C739
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TP
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TP
C731
,2V
C733
8
C732
Q666
0 6 6 2
Q668
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co cc
cc
FIG. 9-7. A 4—Power supply circuit board (below) SNB020475.
C617
C632
|
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c - 47
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S CR654S
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>
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CC
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C715
C737
R733
16
2 M 0 2 3 2 7
CR633
CR626
4
5
T633
6
R626
CR632
T T 4 3 ;
R632
T623
L 632 R634 Q634
R636
9
6
n
C613
C614
17
18
19
20 2122 23 24
A4
POWER SUPPLY
TP
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in
ID
ID
cc
CC
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TP
C623
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25
REV JULY 1974 ®

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