4. Troubleshooting
4.1.4. Digital Part Troubleshooting
1) It is difficult to check digital video signal because of too fast and small signal.
2) Check digital video signal, Use H-sync, V-sync and Clock for basic.
3) Each digital video ICs connected with data line, H-sync, V-sync and Clock line.
4) Check H-sync period, V-sync period, Clock period.
5) If period is out of spec, Change the IC.
H-Sy
nc
1 Period(15.63kHz
)
V-Sy
nc
1
P e riod(50Hz)
Clock
1
P e riod(13.5MHz)
Ye s
Ye s
Ye s
Re place the Main Boa rd.
Re place Fus e (F801S ).
Is th e Fus e (F8 01S ) of the S MP S P owe r
Input P a rt blown?
Re place the S MP S .
S MP S CN801
P IN2 : S TB 5V
PIN1_P S ON : Che ck to s e e if it is 0V
Is th e S MP S CN801 conne ctor a nd the
Main Boa rd CN201 conne cte d?
Is th e S MP S CN801 conne ctor a nd the
Main Boa rd CN201 conne cte d?
No
No
No
4-9
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