Samsung HT-C553, Service Manual

Page: 61 / 82

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