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Now downloading free:Dell p780 D99

Download Dell p780 D99 docs - Computer monitors - CRT, TFT, LCD, touch screen, plasma display - service manuals and repair information

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File name:dell p780 D99 chassis-troubleshooting manual.rar
[preview p780 D99]
Size:511 kB
Model:p780 D99 🔎
Original:p780 D99 🔎
Descr:dell p780 D99 chassis-troubleshooting manual
Group:Electronics > Computer equipment > Monitors >
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dell p780 D99 chassis-troubleshooting manual.pdfD99 CHASSIS OPERATION MANUAL TROUBLESHOOTING MANUAL TABLE OF CONTENTS CIRCUIT DESCRIPTION D Board (Power Supply Section) ... 2 D Board (Deflection Section) ... 9 A Board ... 20 GENERAL TROUBLESHOOTING ... 26 PARTS LEVEL BOARD REPAIR ... 37 TRINITRON® COLOR COMPUTER DISPLAY -1- CIRCUIT DESCRIPTION D BOARD POWER SUPPLY SECTION Power Supply Electrical Circuit The power supply is located on the D Board. It has three modes of operation that are controlled by a microprocessor. The topology is a discontinuous mode flyback converter with photocoupler feedback for regulating the secondary voltages. Circuit operation and troubleshooting are explained in the following sections: Operation Modes AC Input Degauss Circuit Primary Circuitry Operation Modes Secondary Circuitry Protection Circuits Troubleshooting The power supply has four modes of operation, `off', `active off', `suspend/standby' and `

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