Video has no output
Check
whether output
mode switch is
correct
Restore setup mode
2. Troubleshooting process for “Video has no output” is shown in the figure 3.2.2.2:
N
Check
whether 27M clock is
normal
Restore setup mode
N
Y
Check
whether power
supply of MT1389 video
output part is
normal
N
Y
Change MT1389
Whether
component video has
output
Check component video
output circuit
N
Y
Whether
composite video has
signal output
Change MT1389
N
Y
Y
Whether
pin 187 of MT1389
has signal
output
N
Y
OK
Check video filtering circuit
Check
whether JK703 has
signal output
N
Y
Change JK703
Figure 3.2.2.2 Troubleshooting flow chart for “Video has no output”
- 39 -
Содержание DV718SI
Страница 1: ...service manual DV718SI...
Страница 56: ...21 27M clock signal waveform diagram 22 Reset circuit waveform diagram URST Dv33 52...
Страница 92: ...5 1 3 Surface layer of DECODE SERVO Board 88...
Страница 93: ...5 1 4 Bottom layer of DECODE SERVO Board 89...
Страница 95: ...C744 C750 C745 C753 C738 C737 C739 C743 C742 C740 C747 5 1 6 Bottom layer of HDMI Board 91...