Samsung HT-C553 Service Manual page 61

Troubleshooting
4-1-2 No Sound
 Refer to wave pattern
image of Fig. 4-1.
Check AIC4, AIC19 input signals
 Refer to wave pattern
image of Fig. 4-2 and
Fig. 4-3.
Check MPEG DAC output
(1.7v offset) (pin 83, 84, 85, 88, 89, 90
 Refer to wave pattern
image of Fig. 4-4.
4-2
No Sound
Check jack Input.
1
Check JA5 input signals.
(1khz signal)
No
Check AMP input.
2
(AC54, AC55, AC56,
AC1, AC2, AC3)
No
Check MPEG Ouput.
3
of IC10 ES8398)
No
Check MPEG DAC
Check DAC3.3V of IC10
(pin 86)
No
Check Power Lines.
(Check IC36).
Yes
Yes
Yes
Power.
Yes
Check speakers.
(speaker change)
Replace AMP IC.
(AIC4, AIC19)
Check DAC output signal lines
between IC10 and AIC4 and
AIC19
Replace IC10.
Samsung Electronics