The input +19V must be converted down to various lower voltages using Synchronous Buck Regulators. The schematic highlights several key PWM (Pulse Width Modulation) controllers and MOSFET stages:
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For electronics repair technicians, hardware enthusiasts, and reverse engineers, a schematic diagram is an indispensable tool. This article provides a comprehensive technical breakdown of the IPKBL-SR 35W architecture, component mapping, and diagnostic strategies using its schematic. 1. Understanding the IPKBL-SR Nomenclature
Total lack of response to the power button; no voltage on the standby rails.
The Pegatron IPKBL-SR 35W motherboard is a compact, highly integrated board designed for structural efficiency inside Lenovo AIO PCs. When a hard copy of the schematic diagram is unavailable, standard Intel Kaby Lake architecture rules apply. By tracing the +19V input down to the +3.3V standby and +1.2V/+VCCCORE operational rails, technicians can isolate, diagnose, and repair the vast majority of power delivery and firmware failures on this platform. ipkbl-sr 35w schematic
The "IPKBL" designation refers to its Intel architecture, supporting 6th and 7th-generation Intel Core processors.
Main power rail dedicated to the DDR4 memory modules.
After the power button triggers the SIO, the memory power IC enables the +1.2V_DDR rail. Finally, the CPU Voltage Regulator Module (VRM) controllers modulate the high-current +VCC_CORE and graphics ( +VCC_GT ) lines, strictly optimized to remain within the board's 35W thermal threshold. Common Fault Diagnostics and Troubleshooting
| Ref | Value/Part | Notes | |------|-------------|-------| | F1 | 2A / 250V | Slow-blow | | BD1 | GBU406 | 4A, 600V | | C1 | 100µF, 400V | 105°C rated | | Q1 | IPK65R1K5C7 or similar | 650V, 4A | | U1 | LD5760 or IPKBL integrated | Start-up current <10µA | | T1 | Custom: 1.2mH primary | Pri:Sec turns ratio ~8:1 | | Q2 | BSC0906NS (60V, 5mΩ) | SR MOSFET | | U2 | MP6908 | Fast turn-off | | C_out | 1000µF, 25V + 10µF ceramic | Low ESR | The input +19V must be converted down to
: Located almost exclusively in current-limiting or voltage-divider configurations within power rails.
The Super I/O chip (typically an ITE or Nuvoton chip marked on the schematic) controls the step-by-step power-up sequence.
Understanding the schematic and technical layout of this board is essential for technicians performing board-level repairs, memory upgrades, or CPU troubleshooting. Core Technical Specifications
Because this is an AIO motherboard, it lacks standard ATX connectors. Pin assignments must be verified manually: When a hard copy of the schematic diagram
When diagnosing power delivery failures, boot loops, or component degradation on this board, having a deep understanding of its 35W power architecture and schematic topography is essential. This article provides a comprehensive technical breakdown of the IPKBL-SR 35W power Rails, component mapping, and circuit diagnostics. 1. Architectural Overview and System Topology
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Power enters the board via a Lenovo-style rectangular slim-tip DC jack or a standard 19V–20V barrel jack.
1.2V supply controlled by a dedicated buck converter. Common Repair Scenarios