Heathkit HM-2102 - Page 7

Page 4
EIBATEHIIT?
STEP-BY-STEP ASSEMBLY
Before you start the ‘Circuit Board Assembly,” be sure to
read the “Circuit Board Parts Mounting’ and “Soldering”
sections of the “Kit Builders Guide.”
CIRCUIT BOARD ASSEMBLY
Components will be installed on the circuit board by
following the steps on Pages 4 and 5. Position all parts as
shown in the Pictorials, Follow the instructions carefully
and read the entire step before performing the operation.
NOTE: DIODES MAY BE SUPPLIED
IN ANY OF THE FOLLOWING SHAPES.
ALWAYS POSITION THE BANDED END
AS SHOWN ON THE CIRCUIT BOARD.
BAND OR BANDS
(|) 1N295 diode (red-white-green) at
D1 (#56-20).
( ) 1N295 diode (red-white-green) at
D2 (#56-20).
() 1N295 diode (red-white-green) at
D3 (#56-20).
( } 2200 2 (red-red-red).
{ )} 4702 (yellow-violet-brown).
SAFETY WARNING: Avoid eye injury
when you clip off excess leads. We suggest
that you wear glasses, or at least clip the
leads so the ends will not fly toward your
eyes.
( ) Solder all leads to the foil and cut
off the excess lead lengths. PICTORIAL 1
All resistors will be called out by resistance values (in Q or
kQ2); the color code will also be given for all except the
precision resistor. Capacitors will be called out by
capacitance value (in pF or uF) and type (mica or disc).
Locate the circuit board and position it lettered side up as
shown in Pictorial 1. Then complete each step on Pictorials
1 and 2,
CONTINUE
( ) Install a connector pin in the circuit
board as shown.
STOP
RIDGE
a
Ev 7 EOFS EEAPTITITTEY a TPVTETTTTETETIUS
\
FOIL SIDE OF
CIRCUIT BOARD
( ) Connector [_} Connector pin,
68 kQ FC) GBA tbivewayorenee). | ue-gray- [884 (oluegrey-ornge). |
|) 470Q(yellow-violetbrown), | 4700 i} 4702 lyellowviolet brown). -violet-brown).
10 TC) 10k (brown-black-orange). (brown-black- }() 10K tbrown-black-orangel. |
51 '() 51 @, twat (green-brown-black). | watt. (green-brown-black).
Position clear 0 clear of circle.
FOR GOOD SOLDERED
CONNECTIONS, YOU MUST
KEEP THE SOLDERING
\RON TIP CLEAN...
WIPE IT OFTEN WITH A
DAMP SPONGE OR CLOTH.
(
) Solder all leads and connector pins
to the foil and cut off the excess
lead lengths.
(_) Install the 50 kQ control as shown.
Solder the four lugs to the foil.