Rm28525 Schematic Diagram Updated | ORIGINAL — 2024 |

The (often referred to as RM28525) is the Power Supply / DC Board specifically designed for the HP LaserJet M1005 MFP series. The "updated" or "new model" version of this schematic typically features a design without a Switching Transformer (STR), instead utilizing a Mosfet-based power regulation system. Board Specifications & Identification Part Number:

Case 2: One Channel Dead but LEDs Work

• Cause: Failed optocoupler or output transistor. On the updated schematic, IC2A (LTV-817) can be tested.
• Procedure: Apply input signal (3-24V) to channel input. Measure voltage across optocoupler LED (~1.2V). If present but no output, replace optocoupler. Also check pull-up resistor R7 (4.7kΩ) for open circuit.

• 6-pin JST or 2x5 0.05" header; label TX/RX/GND/3V3/RESET.

This article is for informational purposes. Refer to your specific RM28525 board revision for exact component values. Always follow safety procedures when working with live circuits. rm28525 schematic diagram updated

If you are looking for the RM2-8525 board for a repair, consider these common failure points often seen in technical forums: No Power: Check the primary fuse and the bridge rectifier. The (often referred to as RM28525) is the

Terminals 1 & 2 (Load Side): These are for the AC load. Ensure the Heatsink is properly grounded as per the latest safety standards. Cause: Failed optocoupler or output transistor