- 50 -
Audio output is no sound
Check control pin
AUDIO_SW_SE1’ 2 operation is
normal
Check Audio board power 12V is
correctly?
To measure audio board U1 output
waveform (1K Hz sinewave)
Check mute pin AUDIO_VOL_ON
is high or low
Yes
Yes
To measure audio board U1 output
waveform
Yes
Check GPIO control
pin(R277,R278) status
Check GPIO control
pin(R492) status
Check audio board U1
soldering or change another
chip
No
No
No
Check audio board U6(Power
AMP) soldering or change
another chip
No
Yes
Summary of Contents for DV650C
Page 15: ... 15 3 4 2 OSD Table Generic for Version 2 4 1 ...
Page 21: ... 21 3 5 Packing ...
Page 22: ... 22 4 Disassembly Assembly 4 1 Exploded View ...
Page 46: ... 46 5 4 OSD Operation Guide ...
Page 47: ... 47 ...
Page 65: ... 65 Appendix 3 I F Board ...
Page 66: ... 66 ...
Page 67: ... 67 ...
Page 68: ... 68 ...
Page 69: ... 69 ...
Page 70: ... 70 ...
Page 71: ... 71 ...