Acer AL1702 AL1702 Service Guide - Page 16

Continue AL1702 Check the 5V power are supplied on P305 pin 1, 2, 3 (to the LCD panel) NG Check if theVoltage on I312 pin2 that is DC power at 5V. NG OK Failure Point 1) FB314 is open. 2) Printed wire broke between P305 pin1, 2, 3, FB304, and P301 pin1, 2. Check if the TTL level on I312 pin,1 that TTL level is low. OK NG OK Check the PANELVCC_EN signal of the rectangle input Q303 pin2 at TTL high level. Failure Point I312 is failure. NG OK Failure Point 1) Prined wire broke between Q303 pin 3, R309, R308 and I312 pin1. 2) Q303 is failure. Check the P305 all LVDS signals. NG OK Failure Point 1) Printed wire broke betweenP305 and I305 LVDS signals. 2) I305 is failure. Failure Point 1) Printed wire broke between Q303 pin 2 and I307 pin9. 2) I307 is failure. Failure Point 1) The LVDS cable broke between P305 and LCD module. 2) LCD module is failure. Page 14