Acer Aspire 1430 Aspire 1400 Notebook Service Guide - Page 38

*2. Inverter operating frequency should be within specification (51-59kHz) at max. and min. brightness load. *3. INV_PWM enable implies INV_PWM signal is High level (On duty cycle is 100%). It it a square wave of 150Hz to adjust backlight brightness that is a function of PWM duty cycle. Backlight brightness is maximum value under INV_PWM at 100% and brightness is minimum under INV_PWM at 40%. *4.The system interface signals belong to 3.3V. *5. Please make sure open lamp output voltage should be within starting voltage specification. *6. Inverter should pass human body safety test. *7. Inverter should no smoking by any component open/short test. *8. Transformer voltage stress should not be over 85% under any condition. (turn on overshoot transient and line transient.) *9. Audio noise should be less than 36dB at 10cm distance. . Electrical specification No . Symbol 1 V oper* Il Il Min. -6.0 2.7 V Voltage form Falling and Rising time f 50 η 80% Typ. 680 6.3 3.0 100 300 55 85% Max. -6.6 3.3 60 -- Unit V A mArms mArms Vrms kHz -- Comment Enable= H, PWM Duty = 100% Enable = H, PWM Duty = 30% At IL = 5.5 mArms *2 Thermal All components on inverter board should follow below rules: 1. Component using conditions (component stress) must be within component specification including voltage rating, current rating, temperature etc. 2. Component temperature shold follow below: ! ∆T