12
TDK-Lambda
LS
25-150
Series
INSTRUCTION MANUAL
7. External Fuse Rating
Refer to the following fuse rating when selecting the external input fuse. Surge current flows when input turns on.
Fuse rating is specified by Inrush Current value at input turn on. Do not select the fuse according to input current (rms)
values under the actual load condition.
LS25
: F1.6A
,
250V
LS35, LS50
:
T2A , 250V
LS75
: T2.5A
,
250V
LS100
: F4A
,
250V
LS150
: F5A
,
250V
8. Before concluding that the unit is at fault, make the following checks.
z
Check if the rated input voltage is connected.
z
Check if the wiring of input and output is correct.
z
Check if the wire size is correct.
z
Check if the output voltage trimmer (V.ADJ) is properly adjusted.
z
Check if the output current and output wattage does not exceed the specification.
z
Ensure that a large capacitor is not connected across the output terminals. Please use within maximum capacitance
shown below.
Maximum external capacitance
MODEL
3.3V
5V 12V 15V 24V 36V 48V
LS25 10,000uF
5,000uF
2,000uF
1,000uF 500uF
LS35~LS50 10,000uF
5,000uF
2,000uF
500uF
LS75~LS150 10,000uF
5,000uF
1,000uF
NOTE : It is normal to hear audible noise from power-supply under Dynamic Load operation or if the input voltage
waveform is not sinusoidal.
9. Warranty Condition
This product is under warranty for 3 years (based on 8 hours/day operation) from the date of shipment. During the
warranty period, TDK-Lambda will, at it’s option, either repair or replace products prove to be defective.
Warranty applies but not limited to the following.
(1)
Average operating temperature (ambient temperature of the power supply unit) is under 40
o
C.
(2)
Average load factor is 80% or less.
(3)
Installation method : Standard installation.
Following cases are not covered by warranty.
(1)
Improper usage and mis-handling like dropping or applying shock to the unit and defects from operation
exceeding specification of the product.
(2)
Defects resulting from natural disaster (fire, flood).
(3)
Unauthorized modification or repair.
