EFJohnson 988X SERIES Two-Way Radio User Manual


 
SERVICING
4-2
February 2001
Part No. 001-9800-001
± 5% and ± 10% Resistors (P.N. 569-0105-xxx)
The three-digit number used to identify ±5% and
±10% resistors corresponds to the last three digits of
the EFJohnson part number. This number is derived as
follows. For example, “273” indicates a 27k ohm
resistor and “339” indicates a 3.3 ohm resistor.
± 1% Resistors (P.N. 569-0111-xxx)
Some resistors with a ±1% tolerance are identified
by a four-digit number and others may not have a
marking. When identified with a four-digit number,
the first three digits are the value and the fourth is the
multiplier. For example, “5761” indicates a 5.76k ohm
resistor.
4.2.3 SMD CAPACITOR IDENTIFICATION
Ceramic SMD Capacitors (P.N. 510-36xx-xxx)
Ceramic SMD capacitors are identified using
either an American or Japanese EIA standard. The
American standard uses a single letter or number to
indicate the value, and the color of this letter or
number to indicate the multiplier. The Japanese stan-
dard uses a letter to indicate the value followed by a
number to indicate the multiplier. The values for both
standards are shown in the following table. For
example, if there is a single black “E” on the capacitor,
it uses the American standard and its value is 15 pF.
The same value is identified with the Japanese stan-
dard by “E1”.
The Japanese standard may also utilize a bar to
indicate the temperature coefficient. The following
coefficients are indicated by this bar. For example,
“A2” indicates a 100 pF NPO capacitor.
XX
= NPO XX = N150 XX = N220
XX
= N330 XX = N470 XX = N750
|XX = X7R
Multiplier
Value in ohms
X X X
0 = 0
1 =10
2 = 100
3 = 1000
4 = 10,000
5 = 100,000
6 = 1,000,000
7 = 10,000,000
8 = .01
9 = .1
Table 4-1 Ceramic SMD Capacitor Identification
American EIA Standard Japanese EIA Standard
First Letter/
Number
Value
(pF)
First Letter/
Number
Value
(pF)
A10A1.0
B11B1.1
C12C1.2
D13D1.3
E15E1.5
H16F1.6
I18G1.8
J20H2.0
K22 J2.2
L24K2.4
N27L2.7
O30M3.0
R33N3.3
S36P3.6
T39Q3.9
V43R4.3
W47 S4.7
X51T5.1
Y56U5.6
Z62V6.2
368W6.8
475X7.5
782Y8.2
991Z9.1
Color
Multi-
plier
Second
Number
Multi-
plier
Orange 0.1 0 1
Black 1 1 10
Green 10 2 100
Blue 100 3 1000
Violet 1000 4 10,000
Red 10,000 5 100,000