AL2002 Service Guide
Page 38
... PWM. Appendix 4: Troubleshooting OK It is not inverter board problem. NG Check CCFL and repair them is opened. OK Check pin5 of I101 is 5V OK Check if P101, P102, P103, and P104 are connected correctly. 2 ACER AL2002W Go to cover page Inverter circuit on the power board Check C102 pin is around 1.25V from output...
... PWM. Appendix 4: Troubleshooting OK It is not inverter board problem. NG Check CCFL and repair them is opened. OK Check pin5 of I101 is 5V OK Check if P101, P102, P103, and P104 are connected correctly. 2 ACER AL2002W Go to cover page Inverter circuit on the power board Check C102 pin is around 1.25V from output...
AL2002 Service Guide
Page 41
... PWM signal OK Failure Point: Backlight unit of the rectangle input P301 pin2 at TTL high level Failure Point: 1. Power board is failure. 3. Failure Point: 1. Inverter cable disconnected. 2. Printed wire open between P301 pin3 ,R304, Q301, NG R301, R302 and I306 pin50. 2. OK Check... the BKLT_ADJ signal of the input P301 pin3 from Power Board) Appendix 4: Troubleshooting Failure Point: NG 1. R304,Q301,R301 or R302 is failure. ACER AL2002W 5 Go to inverter PWB? (input from I306 pin50 is failure. I306 is failure. I306 is failure. ...
... PWM signal OK Failure Point: Backlight unit of the rectangle input P301 pin2 at TTL high level Failure Point: 1. Power board is failure. 3. Failure Point: 1. Inverter cable disconnected. 2. Printed wire open between P301 pin3 ,R304, Q301, NG R301, R302 and I306 pin50. 2. OK Check... the BKLT_ADJ signal of the input P301 pin3 from Power Board) Appendix 4: Troubleshooting Failure Point: NG 1. R304,Q301,R301 or R302 is failure. ACER AL2002W 5 Go to inverter PWB? (input from I306 pin50 is failure. I306 is failure. I306 is failure. ...