ViewSonic VSXXXXX service manual Power Board, Typical Application

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4.2Power Board

IC901 LD7576

The LD7576X series bring high performance, combines with highly integrated functions, protections and EMI-improve solution. It’s an ideal solution for those cost-sensitive system, reducing component count and overall system cost.

The LD7576X series features near-lossless high voltage startup circuit, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. They also consist with more protections of OLP (Over Load Protection), OVP (Over Voltage Protection) and OTP (Over Temperature Protection) to prevent the circuit damage under abnormal conditions.

The LD7576X series are available in DIP-8 and SOP-8 package.

Typical Application

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Contents ViewSonic VG2427wm VG2427wmSM Rev a MarTdrmnddkwbvspc TdrmnddywbvspcTdrmnddcwbvspc TdrmnddbwbvspcTable of Contents Precautions and Safety Notices Safety PrecautionsProduct Safety Notice Service NotesHanding and Placing Methods Correct Methods Incorrect MethodsPage Specification Front Panel Function Control Description Do the following to adjust the display setting Following tips may help you optimize your displayControl Explanation Audio AdjustMain Menu Controls Page Page Circuit Description Main BoardPin Assignment Page Page Page Page Function Pin DescriptionsName Pin # Power Board Typical ApplicationBlock Diagram Pin Comp GND OUT VCCPin Diagram Functional Block Diagram IC801 TA9687GNPin Description Pin No Names Adjustment Procedure White balance, Luminance adjustmentEnter into Burn/in mode Enter into the factory modeEquipment needed Firmware Upgrade ProcedureISP Board Hardware Connect status Update the NOVATEK’S firmware PC LPTPage Page DDC Key in Procedure Install softwareFor analog Page Troubleshooting Flow Chart Block Diagram DIM ON/OFFMosfet Schematic Diagrams 0R05 1/10W 5%FB402 TO252 0402 Power Board Power XFMR7 IC with Heat-sink90G6295-3 PCB Name Key BoardTPV Model USB Board UpstreamPCB Layout Diagrams Page Power Board Page Key Board USB Board Page Exploded Diagram and Exploded Parts List 10.1 EPLDescription Part Number Qty 10.2 PPL Recommended Spare Parts List Location Part Number Description RemarkCbpc Label WaferCONN.6P 1.0 DIP Wafer 30P 2.0MM DIP Dual ROWPage Chip 22PF 50V NPO RST Chip MAXRST Chipr Chip 5PF 50V NPO Bead 300ΩChip Bead Chip Bead FCM2012VF-301T07 BullwillDome Switch 5PCS PIN PWPC9D41MQWU Power BoardUDZSNP5.6B Rohm TRA LMBT3904LT1G 200MA/40V SOT-23 LRCIC PC123Y22FZ0F RST Ntcr 8OHM £«£20£¥ 4A XianzhengCAP CER 56PF J 3KV Choke by LI TAScrew HS1 Heat SinkDiode SP1060 ITO-220 Secos Screw HS2RST Chipr 3.6K RST Chipr 6.2KOHM +-5% 1/10W Yageo1ST Chipr RST Chipr 1KNPO RST Chipr 820KOHM +-5% 1/4W FenghuaX7R Power Board PCB Jumper WireChip Bead HCB3216KF-800T30 Bullwill BAV70 SOT23 by PAN JITConnector VSC 23.6 Hinge AssyHT POT Label Pallet LabelRST Chip MAX 0R05 1/4W Diode ESD EGA 10603V05A1-B InpaqUSB Board PCB Different Parts List Diversity of Tdrmnddcwbvspc compared with TdrmnddkwbvspcLocation Part Number Description Diversity of Tdrmnddbwbvspc compared with TdrmnddkwbvspcReader’s Response Name Company Add Tel Mail Title Fax