Avtech AVM317A Wartungshandbuch - Seite 6

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B. Video Loss
Step1: Measure the component U2 Pin5 of AM317BS if the voltage is 1.2.
State: Yes, go to step2.
No, change the component U2. Please sent it back to RMA if the voltage isn't
1.2V after changing.
Step2: Measure the component U3 Pin5 of AM317BS if the voltage is 2.7V.
State: Yes, go to step3.
No, change the component U3. Please send it back to RMA if the voltage isn't
2.7V after changing.
Step3: Measure the component U4 Pin5 of AM317BS if the voltage is 1.8V.
State: Yes, go to step3.
No, change the component U4. Please send it back to RMA if the voltage isn't
1.8V after changing.