Samsung PS-42P7HD Manuel de service télécharger pdf (Page 27)

Troubleshooting

4-12 Samsung Electronics

⑤ Address Open, Short

▶ Address Open and Short is related with Logic Main, Logic Buffer, FFC, TCP film and so on.

This page shows you how to check the boards, and the following pages show you how to find the defective board.

[ Logic Main ]

Address Open/Short

Check the LED operation

LED2011 : blink

LED2010 : on

Check if the internal mode

screen is normal

Reload the data onto the

MICOM and recheck it

Check if there is an open or

short circuit on the Buffer Board

and the Logic Main address

data output section.

Check the FFC connection status

Check the detailed waveform

and control the signal waveform

Check if a specific TCP Block

screen is displayed abnormally

Replace Logic Main /

Address Buffer (E or F) /

FFC

DONE

Check the

Video Board

check the voltage of

U2650 pin1 is 3.3V

check the voltage of

C2901, C2902, C2903 is 1.25V

Replace the Panel

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Samsung PS-42P7HD Manuel de service Page 27