Elenco Electronics SP-3B Assembly And Instruction Manual page 12

PC BOARD ASSEMBLY (continued)
Solder the following parts to the PC board.
U1 - 16-pin IC Socket
(see Figure C)
R14 - 27kΩ 5% ¼W Resistor
(red-violet-orange-gold)
(see Figure D)
R13 - 18kΩ 5% ¼W Resistor
(brown-gray-orange-gold)
(see Figure D)
R17 - 100kΩ 5% ¼W Resistor
(brown-black-yellow-gold)
(see Figure D)
R18 - 120kΩ 5% ¼W Resistor
(brown-red-yellow-gold)
(see Figure D)
When mounting the IC socket,
make sure that the notch is in the
same direction as marked on the
PC board.
Resistance Testing #2 (If you do not have a meter, continue to page 12)
Each resistor is connected across two pins of the IC socket. You will test the solder connections by measuring
the resistance from the following IC pins. If your readings are different, double check your soldering connections.
Location
R14 - Measure from pin 1 to pin 2
R13 - Measure from pin 3 to pin 4
R17 - Measure from pin 5 to pin 6
R18 - Measure from pin 7 to pin 8
R19 - Measure from pin 9 to pin 10
R20 - Measure from pin 11 to pin 12
R16 - Measure from pin 13 to pin 14
R15 - Measure from pin 15 to pin 16
Figure C
Notch
Figure D
Stand resistor on end as
shown with the body
inside the white circle
Value
27kΩ +/– 5%
18kΩ +/– 5%
120kΩ +/– 5%
100kΩ +/– 5%
470kΩ +/– 5%
680kΩ +/– 5%
47kΩ +/– 5%
39kΩ +/– 5%
-11
R15 - 39kΩ 5% ¼W Resistor
(orange-white-orange-gold)
(see Figure D)
R16 - 47kΩ 5% ¼W Resistor
(yellow-violet-orange-gold)
(see Figure D)
R19 - 470kΩ 5% ¼W Resistor
(yellow-violet-yellow-gold)
(see Figure D)
R20 - 680kΩ 5% ¼W Resistor
(blue-gray-yellow-gold)
(see Figure D)
White Circle
1
8
16
9