The standby PWM IC transforms the 19V rail down to 3.3V and 5V. These rails must be present the moment the charger is plugged in.
Supports Intel Broadwell-U (Ultra Low Voltage) processors. Memory: Utilizes DDR3L RAM slots.
If you are using the Boardview for a real repair, keep these common failure points in mind for this specific revision: Power Rails: generated by the TPS51225RDCR (PU100). Charging Circuit: La-c701p Rev 1.0 Boardview
If you are looking for specific, actionable troubleshooting steps or to buy the boardview file, I can point you to reputable electronics forums, component sellers, or specialized tool providers that often host these files.
Launch the software and load your unzipped LA-C701P.brd file. The standby PWM IC transforms the 19V rail down to 3
: Common on the 19V primary rail or secondary rails like +3VS and +5VS.
[ DC-In Jack / Charging Port ] | [ DC-In Mosfets (Protection) ] | [ +19V Main Power Rail ] | +----------------------+----------------------+ | | [ 3.3V / 5V Standby IC ] [ SIO Control Chip ] (Always-On Power Rails) (Power Sequence Engine) 1. DC-In and Charger Circuitry Memory: Utilizes DDR3L RAM slots
Once you load the La-c701p file into your viewer:
Intel Core i3 / i5 / i7 (Typically 5th or 6th Generation U-series) DDR3L / DDR4 SO-DIMM Slots (Configuration dependent) Graphics Options
: Use the file to locate the DC-In jacks, the first and second input MOSFETs, and the main current-sensing resistor ( PR8 or equivalent). Check for a short circuit to ground on the main B+ (19V) power rail. 2. Missing 3.3V and 5V Always-On Power Rails