2-49
ELECTRICAL TROUBLESHOOTING GUIDE
5. NO AUDIO OUTPUT
No AUDIO output
YES
YES
YES
X401 24.576 MHz OK?
IC703
A_PVDD (22.3 V) OK?
IC401 3.3 V, 1.2 V OK?
IC401 pin19, 20, 21, 22, 23, 24
I2C data OK?
IC703
pin2, 3, 12 OK?
Replace X401.
Check SMPS board.
Check IC157, IC153.
Check IC501 B10 / D7 / C7 / D8 / C8 pin.
Check IC101.
Replace IC703.
YES
YES
YES
NO
NO
NO
NO
NO
Summary of Contents for SoundPlate lab550h
Page 65: ...2 52 3 AUDIO PART 1 DSP I2C IC401 SPI_SCL IC401 SPI_DATA 6 7 6 7 ...
Page 66: ...2 53 4 AUDIO PART 2 DSP I2S M_LRCK M_BCK M_DATA0 8 9 10 M_BCK M_DATA0 10 8 9 ...
Page 67: ...2 54 5 HDMI PART 12 11 H_SDA H_SCL 11 12 ...
Page 82: ...2 84 2 83 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 83: ...2 86 2 85 3 FRONT P C BOARD 4 FRONT KEY P C BOARD TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW ...
Page 87: ...3 4 1 Remove the Chassis Main Assembly Fig 5 Chassis Main Assembly Chassis Main Assembly ...
Page 90: ...3 7 1 Remove the 2 screws securing the KEY PCB 2 Remove the KEY PCB Fig 10 KEY 1 ...
Page 91: ...3 8 ...
Page 95: ...3 16 3 15 ...
Page 107: ...4 12 ...