Larcan MXi101V, Technical & Service Manual

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MXI101V TECHNICAL SERVICE MANUAL
3.3 L
EADED
R
ESISTORS
Generic carbon composition resistors with leads are numbered as follows:
3R P
nnnx
- or -
nnx
Power Rating Resistance Value * Tolerance
152 = 1/4W nn - first digits of K =10%
77 = 1/2W resistance (5, 10% tol.) J =5%
78 = 1W nnn - first digits of H =1%
79 = 2W resistance (1% tol.)
x - x10 multiplier
For values between 1 Ω and 10 Ω , a letter “R” will appear in the resistance value to indicate the decimal place.
For vendor leaded resistors a generic drawing describing basic specifications, but having many “parts”, will often
be used.
“3R152P5R6J” is 5.6 Ω , 1/4W, ±5%
“3R152P470K” is 47 Ω , 1/4W, ±10%
“3R152P1022H” is 10.2k Ω , 1/4W, ±1%
“3R152P102J” is 1k Ω , 1/4W, ±5%
3.4 S
URFACE
M
OUNT
R
ESISTORS
1/4W
AND
L
ESS
There is no specified recommended supplier of these parts. The Philips numbering system is employed with the
following parameters/designations (example follows):
9C A nnnx
SIZE LxW POWER
RATING
RESISTANCE VALUE TOLERANCE TEMP COEF
0603=
1.6x08mm
1
= 1/16W nnx tolerance>=5%
D
=0.5%
C
=50ppm/°C
nn=first 2 digits
x=multiplier
F
=1%
K=
100ppm/°C
0805=
2x1.25mm
2
= 1/10W
nnnx tolerance<5%
J
=5%
L
=200ppm
/°
C
nnn=first 3 digits
1206=
3.2x1.6mm
2
= 1/8W
(1% tol.)
x=multiplier
M
=300ppm/°C
3
=1/4W
(5% tol.)
nRnx or nnRnx or nRnnx
R inserted as decimal point
where required
0000 - four zeros for jumper
The pairs of parameters enclosed in boxes are normally mutually selected; for example, a resistor having 1%
tolerance normally is selected as having a temperature coefficient of 100ppm/°C.
TSM21Q-365 Rev 0 July 17, 2009 MXi101V 8