NM-C561 (GS44B/GS54B) is a motherboard produced by LC Future Center (LCFC) primarily for the Lenovo IdeaPad S145-15IKB
. As a technical resource, the schematic and accompanying boardview are essential tools for repair technicians diagnosing power issues, component failures, or board-level damage in this series of laptops. Motherboard Overview
The NM-C561 platform is designed for mid-range performance, featuring the following core specifications identified in its schematic: Processor: Supports Intel Kaby Lake-U (KBL-U22/U42) CPUs. Utilizes DDR4 RAM architecture.
Offers configurations with discrete NVIDIA graphics (N16S-GTR or N17S-G1) alongside integrated Intel graphics. Connectivity:
Includes standard peripheral support for SATA, USB, LAN, and audio. Technical Resource Review
Technicians typically use these documents for several high-impact repair tasks: Voltage Rail Troubleshooting:
The schematic allows for tracing critical power paths (such as the 3.3V/5V always-on rails) to identify short circuits. Boardview Visualization:
Because physical motherboards often lack component labels (silk-screen), the NM-C561 Boardview
is used to locate specific resistors, capacitors, and ICs mentioned in the schematic. Component Identification: gs44b gs54b nm-c561 schematic
It provides the exact values and ratings for surface-mount components, which is necessary when a part is burnt and unreadable. Availability and File Details The NM-C561 schematic is typically distributed as a PDF. Common Version:
Revision 0.1 is the most widely documented in technical archives. File Size: Approximately 2.17MB for the boardview package.
Technical documents can be found on specialist platforms like LaptopSchematics.com NotebookSchematics
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The Samsung NM-C561 (GS44B/GS54B) schematic is a compact, efficient design typical of mid-range UHD televisions. Understanding the isolation between the standby power logic and the main SoC power domains is critical for effective troubleshooting. For repair purposes, reference to the specific silkscreen on the PCB is recommended, as component values (resistors/capacitors) may vary slightly between revision numbers.
GS44B/GS54B NM-C561 is a motherboard schematic and boardview reference for the Lenovo IdeaPad S145-15IKB laptop. Manufactured by LC Future Center (LCFC)
, this board is a common platform for mid-range IdeaPad models released around 2019. Technical Specifications & Core Architecture The NM-C561 motherboard is designed to support both Intel Kaby Lake-U (7th Gen) Kaby Lake-R (8th Gen) processor series. Chipset/CPU: Intel KBL-U22/U42. Integrated Available in both (Integrated) and NM-C561 (GS44B/GS54B) is a motherboard produced by LC
(Discrete) configurations. The discrete models typically use NVIDIA GeForce MX110/MX230 (N16S-GTR/N17S-G1) with GDDR5 memory. Embedded Controller (EC): Managed by the ITE IT8586E Connectivity: Includes SATA, USB, audio, and LAN interfaces. Essential Repair Resources
For technicians, the schematic and boardview are critical for diagnosing power issues or component failures. Schematic Diagram:
A detailed 60+ page PDF mapping all electrical circuits and power rails. Boardview File: Often provided in
format, this allows visual tracing of components like resistors, capacitors, and ICs directly on a digital PCB representation. Power Flow & Sequence:
These diagrams help troubleshoot "No Power" states by showing the step-by-step voltage initiation (e.g., verifying if the input reaches key test points like Where to Find Files
These documents are proprietary but can be accessed through various technician-focused repositories: overview of the GS44B/GS54B schematic for viewing. Laptop-Schematics: Provides the full NM-C561 schematic and boardview package for purchase. Laptopserviz: Lists individual NM-C561 schematic Frequently hosts Rev 0.1 schematics for community use. Are you troubleshooting a specific power issue , like the board not turning on or having no display? GS44B/GS54B Schematic Overview | PDF - Scribd
The NM-C561 schematic separates analog and digital signal paths to minimize noise interference.
Video Path:
CN_LVDS or CN_MAIN, requiring high-speed routing impedance control (typically 100 ohms differential).Audio Path:
Always confirm polarities and active levels before connecting.
The NM-C561, like most modern Lenovos, charges via USB-C. The primary controller is usually a TPS65994 or an ROHM chip.
VBUS and CC1/CC2 lines.20V MOSFET or a dead ESD diode on the CC lines.The most helpful aspect of the schematic for DIYers is the pinout. These packs usually feature a proprietary connector. However, the layout is almost always consistent with standard "slider" style packs.
Standard Pin Configuration (Top View):
| Pin Position | Function | Wire Color (Typical) | Description | | :--- | :--- | :--- | :--- | | 1 (Outer Edge) | Positive (+) | Red | Main Power Output | | 2 | N/C or Thermal | White/Blue | Often unused or connected to an internal NTC thermistor. | | 3 | ID / Signal | Yellow/Green | Sometimes used for tool identification or fuel gauge. | | 4 (Outer Edge) | Negative (-) | Black | Main Ground |
Note: If your specific module is a "slide-on" style for Parkside tools, there is often a "T" (Thermistor) pin. This pin connects to a 10k NTC thermistor inside the pack. If you are bypassing the original charger, you generally do not need to use this pin for power.
If you are looking for the schematic because your battery is not working, here are the common failure points and how to test them using a multimeter. Conclusion The Samsung NM-C561 (GS44B/GS54B) schematic is a