Service Manual ASUS VH222S&VH222D
61
11.2 Power/Inverter Board
1.) No power
Check F801 = 14.5V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C907 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin8 of U901
Check R908, R911 and Change U901
NG
Check the auxiliary voltage is bigger than
11V and smaller than 25V
1) Check U901
2) Check R913, D904 circuit
OK
OK
NG
Check Q901, U902, U903, D901, D902, D906,ZD901,Q904
OK
Check U901 pin5 PWM wave
OK
Check U901
NG
NG
NG
OK
NG
Summary of Contents for VH222D
Page 7: ...Service Manual ASUS VH222S VH222D 7 Front View ...
Page 26: ...Service Manual ASUS VH222S VH222D 26 6 PCB Layout 6 1 Main Board 715G2904 2 5 ...
Page 27: ...Service Manual ASUS VH222S VH222D 27 ...
Page 28: ...Service Manual ASUS VH222S VH222D 28 ...
Page 29: ...Service Manual ASUS VH222S VH222D 29 6 2 Power Board 715G2892 1 ...
Page 30: ...Service Manual ASUS VH222S VH222D 30 6 3 Key Board 715G2900 1 2 ...
Page 64: ...Service Manual ASUS VH222S VH222D 64 12 Exploded View ...