3-3
< MAIN board top view >
NO BOOTING
When you plug power cord and turn the unit on, LED won’t turn on, the unit won’t read disc normally.
1-2. Please check MAIN board IC601 signal and its peripheral circuit.
1) Please check if output voltage 3.3 V from IC601 pin8, pin19, pin50, pin68, pin84 is normal.
If output voltage 3.3 V is not normal, please check 3.3 VA power line of the MAIN board.
2) Please check if output voltage 1.8 V from IC601 pin54, pin90, pin123 is normal.
If output voltage 1.8 V is not normal, please check 1.8 V power line of the MAIN board.
3) Please check oscillating frequency 27 MHz of MAIN board X601 crystal is normal.
If oscillating frequency 27 MHz is not normal, please check if X601 and its peripheral circuit is in failure.
4) Please check if frequency 135 MHz of IC601 pin66 R_CLK is normal.
If frequency 135 MHz is not normal, please check if IC601 is in failure.
ONE POINT REPAIR GUIDE
X601
(X-TAL)
IC601
(MPEG)
jomi
