Ipkbl-sr 35w Schematic Jun 2026

(Optional: Add a clear photo of the PCB top and bottom to help others identify it.)

Note: Always disconnect mains power before servicing. High voltage capacitors can hold a lethal charge even after power is removed.

The schematic for the 35W variant features a leaner multi-phase buck controller setup than its 65W counterpart. It typically employs a 3+1 phase power delivery topology managed by a PWM Controller IC (such as an Intersil or Richtek variant): allocated to VCCCORE (CPU Core Voltage).

: Real-Time Clock Reset must be high (3.3V) via the CMOS battery. 3VS5 / 5VS5 : Standby voltages must stabilize. ipkbl-sr 35w schematic

Powers the Intel Platform Controller Hub core logic.

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.

Usually provided by Compal or Wistron; the signal naming is standardized, which is a huge plus for technicians using a multimeter or oscilloscope. Pros and Cons ✅ Strengths (Optional: Add a clear photo of the PCB

The layout includes accessible test points for the +3VALW and +5VALW rails, which are the most common failure points.

: Powers the Embedded Controller (EC / Super I/O) and the power management logic before pressing the power button.

If the board has no signs of life, the schematic directs you to the input N-Channel MOSFETs (often configured back-to-back to prevent reverse current). It typically employs a 3+1 phase power delivery

Do you have access to a or an oscilloscope to trace the voltage rails?

The IPKBL-SR is a motherboard commonly utilized in HP Pavilion and HP Envy All-in-One systems. Understanding its layout is essential for DIY repairs, RAM upgrades, or troubleshooting power issues. Technical Specifications Overview

: Check the SPI Flash chip ( U designator near the PCH). Pin 8 must measure exactly +3.3V . Pin 1 (Chip Select) should display high-frequency data waveforms on an oscilloscope upon power-up. If the data line remains flat, the BIOS firmware may be corrupted.