Samsung DMT300 Series Training Manual page 31

Troubleshooting and Adjustment – Resolution by symptom
1. When the power does not come on
Is the connected condition of the power cable good?
Is the wire connection of the power supply of main PBA normal?
The power does not come on.
Y
Is the used voltage normal?
Y
Y
Is the voltage between No. 6 and 7
pin of CN7 connector of main PBA
4.5V or above and the voltage
between No. 6 and 12 pin 10.5V or
above?
Y
Sub PBA ASSY is defective.
Please replace it.
N
Connect the power cable firmly.
N
Check the used voltage. (Check
N
Check the wire connection of the
N
The main PBA is defective.
Check point
1. Touch control connection error.
2. A short for vapor leak.
3. Refer the service manual page.4-10.
AC 120V)
power part.
Please replace it.