Samsung HW-C450, Service Manual

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4-4 Samsung Electronics
Troubleshooting
4-1-2 No Output (for Digital Input)
1
Check if signal is
measured at pin 22 of DIIC1 of the
Main PCB.
Yes
Replace the DIIC1.
No
No output
B
Yes
2
Check the DSIC1 pin 130
Signal.
No
Replace the DSIC1.
Check DIR Output.
Check DSP Output.
Replace the PWIC1
No
3
Check if signal is
measured at pin 15 of PWIC1 of the
Main PCB.
Check PWM Input /
Output.

Refer to wave pattern
image of Fig. 4-3.

Refer to wave pattern
image of Fig. 4-4.
A

Refer to wave pattern
image of Fig. 4-5.
Check if 3.3V
power is measured at pin 9 of DIIC1
of the Main PCB..
MAIN PCB DSIC1
No.142,144 clock check.
MAIN PCB PWIC1
No.4,10,22 3.3V check
No
No
No