Heathkit HW-12 - Circuit Board Assembly

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HIELATHLEICIT
CIRCUIT BOARD ASSEMBLY
Because the circuit board is quite large, it has
been divided into small sections to simplify
assembly, This will make it easier to identify
the points on the circuit board that are referred
to throughout the assembly instructions, The
sections of the circuit board are similar to those
of a road map; the sections are identified by
numbers across the top and bottom, and letters
down each side of the circuit board, The
imaginary dividing lines (see Pictorial 1) run
vertically and horizontally between the circuit
board mounting holes,
For instance, to locate connector 7 in section
1B, you would first find section 1Bofthe circuit
board and then iook for connector 7 in this
section, Pictorial 1 shows the circuit board
sections,
NOTE: Before circuit board assembly is started,
we suggest that you read Circuit Board Wiring
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on it as shown in Pictorial 1,
(.,) Referring to Detail 1A, install 7-pin tube
sockets at locations v3, v4, vo, v10, v13,
WVU eet in BY AU MeL
and V14, Solder all 7 pins ‘of each socket.
CAUTION: Be careful not to cover unused
holes when sold no
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PLACE PINS INTO APPLY PRESSURE
MOUNTING HOLES, MAKE EVENLY UNTIL ALL PINS
SURE ALL HOOKS ARE SEATED SNAP INTO PLACE,
IN HOLES BEFORE PRESSING. =
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PUSH |
Detail 1A
(A In a like manner, install 9-pin tube sockets
at locations V1, V2, V5, V8, V11, and V12,
Solder all 9 pins of each socket,
Page 13
STEP-BY-STEP ASSEMBLY |
UA Referring to Detail 1B, remove pins 5 and6
from one of the 12-pin tube sockets, The pin
numbers are molded onthe top and bottom of
the socket,
PUSH PIN OUT
fi
ats BEND DOWN
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t
( p Referring to Detail 1C, install the prepared
socket at location V6, Align the keyway of the
shen with the arrow printed on the circuit
board, Solder all 10 pins.
KEY WAY
Detail 1¢
G) In a similar manner, remove pins 8 and 9
from the other 12-pin tube socket,
(J Install this socket at location V7. Solder all
10 pins,