TDK-Lambda PH-A280 Series Instruction Manual - Tdk-Lambda
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TDK-Lambda
PH-A280 Series
INSTRUCTION MANUAL
8. Before Concluding Power Module Damage
Verify following items before concluding power supply damage.
(1) No output voltage
・
Is specified input voltage applied?
・
Are the ON/OFF control terminal (CNT), remote sensing terminal (+S, –S), output voltage trimming
terminal (TRM) correctly connected?
・
For cases where output voltage adjustment is used, is the resistor or variable resistor setting, connections
correctly done?
・
Are there no abnormalities in the output load used?
・
Is the base-plate temperature within the specified temperature range?
・
Is the room temperature within the specified temperature range?
(2) Output voltage is high
・
Are the remote sensing terminals (+S, –S) correctly connected?
・
Is the measurement done at the sensing points?
・
For cases where output voltage adjustment is used, is the resistor or variable resister setting, connections
correctly done?
・
Are there no abnormalities in the output load used?
(3) Output voltage is low
・
Is specified input voltage applied?
・
Are the remote sensing terminals (+S, –S) correctly connected?
・
Is the measurement done at the sensing points?
・
For cases where output voltage adjustment is used, is the resistor or variable resistor setting, connections
correctly done?
・
Are there no abnormalities in the output load used?
(4) Load regulation and line regulation is large
・
Is specified input voltage applied?
・
Are the input terminals and the output terminals firmly connected?
・
Is the measurement done at the sensing points?
・
Is the input or output wire too thin?
(5) Output ripple voltage is large
・
Is the measurement done according to methods described in the Instruction Manual or is it an equivalent
method?
・
Is the input ripple voltage value within the specified value
?
9. Warranty Period
Warranty period is 5 years.
For damages occurring at normal operation within this warranty period, repair is free of charge.
Following cases are not covered by warranty
(1) Improper usage like dropping products, applying shock and defects from operation exceeding
specification of the unit.
(2) Defects resulting from natural disaster (fire, flood etc.)
(3) Unauthorized modifications or repair by the buyers’ defects not cause by our company.