Lad711p | Rev 10 Schematic Top
If you could provide more context or details about what LAD711P REV 10 SCHEMATIC TOP refers to (such as the type of device it's used in, or its function), I might be able to give a more targeted response or suggestions on where to find a relevant review.
The LAD711P Rev 10 uses a modern resonant topology for high efficiency (>85%). Understanding its schematic allows repair of Samsung LN40C530, LN46C550, and similar models. Key vulnerabilities are the PFC stage and startup resistors for standby.
LA-D711P (BDL51) is a laptop motherboard manufactured by Compal, primarily used in lad711p rev 10 schematic top
If the laptop doesn't charge or turn on, check the MOSFETs near the DC-in connector. Look for the current-sensing resistor ( PR... on the schematic) which connects to the charging IC. B. EC/KBC Chip Area (KB9022Q)
Power enters the board from either the 19.5V DC jack or the 11.1V Li-ion battery. This voltage is distributed across the board as the primary high-voltage rail, usually labeled or VIN . Two isolation MOSFETs managed by the charging IC control this entry point to protect the board from overvoltage or reverse polarity. Always-On Power Rails ( 3V_5V_ALW ) If you could provide more context or details
: Typically a multi-pin chip (e.g., an Intersil ISL or Texas Instruments BQ series) manages the gate voltage of these input MOSFETs.
When diagnosing an LA-D711P motherboard that exhibits no power or zero current draw from a Bench Power Supply, component isolation always starts at the primary charging circuit. Technicians frequently refer to the cross-compatible Compal BDL50 LA-D704P schematic or similar platforms when working on this power architecture. 1. DC-In and the Adapter ID Circuit Key vulnerabilities are the PFC stage and startup
In hardware diagnostics, the physical "top" of the schematic power tree describes how raw power flows from the DC-In jack or the battery pack into the primary protection MOSFETs and the system charging IC. The Primary Power Sequence & Top-Level Rails
Before the user presses the power button, the motherboard must generate low-voltage standby power to run the embedded controller (Super I/O).
| Designator | Node | Expected Value (Standby) | |------------|-------------------|---------------------------| | TP1 | Bulk DC voltage | 320–380V DC | | TP2 | IC VCC | 12–18V DC | | TP3 | MOSFET Gate | 0V / 8–12V pulsed | | TP4 | Current sense (CS) | <1V peak (varies with load) |