IBM THINKPAD T60 DC 1.5V 1.05V CIRCUIT FAST TEST WAY

Power management chip U29 (MAX1540ETJ) output DC 1.5V voltage (VCC1R5M,test point 1), and DC 1.05V voltage (VCC1R05B, test point 2).

Complementary push-pull circuit, opposite phase PWM  pulse signal to control mosfet (test point 3). Look at their waveform on the picture.

U29 25-Pin control the G pole of Q14 Q90 upper mosfet, .... read more