Component Replacement; Chip Component Identification - Midland Syn-Tech 70-342XL Service Manual

COMPONENT REPLACEMENT
7 0 - 3 4 2 ~ ~ / 4 4 2 ~
CHIP COMPONENT IDENTIFICATION
CHIP CAPACITORS:
Chip capacitors typically are brown, green or white
and marked with one alphabetical character followed by a numerical
multiplier. Bars above, below, or beside these characters define
temperature characteristic.
ALPHABET
CHARACTER
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
-
Example:
A1
marking indicates a
10
pF
NPO
capacitor.
A
=
1.0, 1
=
x10, two bars above
=
NPO
TEMP.
COEFF.
(PPM/"C)
B A R
LOCATION
CHIP RESISTORS:
Chip resistors used i n the
SYN-TECH
typically are
white with blue value markings. Resistance i n ohms can be determined
from value markings a s follows:
NUMERICAL
VALUE
1.0
1.1
1.2
1.3
1.5
1.6
1.8
2.0
2.2
2.4
2.7
3.0
3.3
3.6
4.3
4.7
1st two digits
- -
significant numerals
(00
to
99)
3rd digit
--
amount of following zeros
NPO
f i
Example: 125
=
12 & 00000
=
1,200000 ohms
=
1.2 megohm
ALPHABET
CHARACTER
T
U
V
W
X
Y
Z
a
b
d
e
f
m
n
t
Y
NUMERICAL
VALUE
5.1
5.6
6.2
6.8
7.5
8.2
9.1
2.5
3.5
4.0
4.5
5.0
6.0
7.0
8.0
9.0
N150
A1
N220
AT
NUMERICAL
CHARACTER
0
1
2
3
4
5
8
9
N330
-
A
1
MULTIPLIER
VALUE
1.0
10
100
1000
10,000
100,000
0.01
0.1
N1500
I A
1
N470
-
A
1
N750
A
-
1
+350
-1000
A1
+20%
-20%
A11
+80%
-20%
--
A
1