Tektronix 221 Instruction Manual page 58

"See Parts List for
serial number ranges.
tLocated on back of board.
^Soldered on
emitter lead.
R137
R153
R143
R 144
R 154
R 145
R155
R146
R 147
o
R156
T —
cc
R136
o
R174
R175
tC 175
R 173
a ? .
I"' tD
I- p s
R176
a: r-
u 5
C N
C D
CO
D C
O
Fig. 9-4 A 2 —Preamplifier circuit board
CR132
C O
— 4
fo
C O
C O
u
R 134 C N
C O
C O
<
C D
C O
C O
C N
(0
c n
R164
to
h*
(D
C D
r>
C D
R165
« D
1 5 7 3 - 2 6