- 21 -
No power
Normal Operation
Check VCC3.3VSB and
U1202.
No
Yes
Yes
6. POWER PART(MAIN BOARD) (RX)
Check R1204, CB1204,
U1201 and U1202
No
Replace Q1901
No
Yes
Check J1201 and power
board.
No
Yes
Check U1905, U1904 and
Q1905
No
Yes
Check blue LEDs.
ON or not?
Check the
voltage of pin No. 1 on
Q1902.
3.3V or not ?
Check the
voltage of pin No.
5,6,7and 8 on Q1901.
3.3V or not ?
Check the
voltage of pin No. 4,5
and 6 on J1201.
5V or not ?
Check the
voltage of CP1905.
1.2V or not ?
