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Samsung SF3000 Service Manual page 49

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Operator's manual (110 pages)

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Troubleshooting

7-2-3. No +24 V

START

Y

DC 24V

N

Check PCB Pattern

7-4

N

output shorted ?

Y

Remove short

Y

Check ED3 ?

N

Replace ED3

D4 Open or

N

Shorted ?

Y

Replace D4

Check CON1

Check L1 Input

voltage

END

Samsung Electronics

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