
Check panel circuit
Change 1389
Whether
screen display is
normal
Whether
MT1389 has signal to
panel
Whether
firmware is correct
Upgrade again
Whether
sound is normal
Check audio output circuit
Check
whether MT1389
has audio signal
output
Check MT1389 and power
supply
A
Figure 3.3.2.1 Troubleshooting flow chart for “Power on”
Y
N
Y
N
Y
Y
N
N
N
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Содержание DV725SI
Страница 1: ...service manual DV725SI...
Страница 62: ...21 27M clock signal waveform diagram 22 Reset circuit waveform diagram URST Dv33 58...
Страница 95: ...5 1 7 Surface layer of DECODE SERVO Board 91...
Страница 96: ...5 1 8 Bottom layer of DECODE SERVO Board 92...