Heathkit IO-4205 - Page 22

Page 20
NOTE: When you install a transistor in
each of the following nine steps, align
its flat with the flat on the board . Insert
the leads into their correct E, B, and C
holes. Position
the transistor 1/ 4"
above the board. Then solder the leads
to the foil and cut off the excess lead
lengths.
t;:~ . ;&l
( ) Q103A: MPSA20 transistor
(#417-801).
[ VJ Q107A: 2N4121 transistor
(#417-235).
(
-/)' Q106A: 2N4121 transistor
(#417-235).
Q109A : 2N4121 transistor
[#417-235).
Q108A : 2N4121 transistor
(#417-235).
( V
Q111A: 2N5770 transistor
(#417-293).
112A: . 2N5770 transistor
#417-293).
SE6020
transistor (#417-
( vl Q114: SE6020 transistor (#417-
237).
IDENTIFICATION
DRAWING
PART
NUMBER
The steps performed in this Pictorial are
in this area of the circuit board.
PICTORIAL 1-9
-II
(
+
[
(
CONTINUEO
NOTE: In the following four steps, in-
stall
each of the transistors as follows:
1. Refer to
the illustration example
below and identify theE , B, and
C leads of the transistor.
2. Insert the transistor leads into
the corresponding E, B, and C
holes
in the circuit board.
3. Position the transistor approxi-
mately 1/
4" above the circuit
board .
4.
Turn the circuit board over, sol-
der the leads to the foil, and cut
off the excess lead lengths.
WI DE
CJjE
B E
WI DE
[ ") Q104A: 2N4248 transistor
[# ,17-260).
transistor