Rm1-2316 Schematic ((install)) Jun 2026
Working with switch-mode power supplies is .
Check the fuser power output connector for signs of overheating or burnt contacts. 4. Replacement and Maintenance
The exact you are seeing (e.g., blinking lights, error codes, dead unit). Whether you are working with a 110V or 220V regional model .
Input surge protection and safety fuse. If the printer is completely dead, this is the first point of failure. Bridge Rectifier: Converts AC to high-voltage DC. Main Capacitor: Filters the high-voltage DC (
Typically a 250V, 3.15A slow-blow glass or ceramic fuse designed to snap during a dead short. Rm1-2316 Schematic
+-------------+ +------------+ +------------+ +-------------+ | AC Mains | --> | EMI Filter | --> | Rectifier | --> | High-Voltage| --> +24V DC (Main motor, | (220-240V) | | & Fuse | | & Bulk Cap | | DC-DC | Laser/Scanner) +-------------+ +------------+ +------------+ | Converter | | (Flyback) | --> +5V DC (Logic, USB) +-------------+ +-------------+ | | +3.3V DC (Microcontroller) | +-------------+ +----------------------> +24V DC (Fuser Heater) (Switched via Relay)
Understanding the schematic helps technicians identify why the board fails.
When reviewing the RM1-2316 schematic (available in HP technical service manuals), focus on the following:
Composed of common-mode chokes and X/Y safety capacitors to prevent the printer’s high-frequency switching noise from feeding back into your building's wall outlets. Working with switch-mode power supplies is
| Symptom | Likely Failure | Fix | |---------|---------------|-----| | No output, input fuse OK | Dead MOSFET (shorted gate) | Replace MOSFET; check gate drive resistor (Pin9) | | Outputs oscillate wildly | Optocoupler failure or bad feedback resistor divider | Optocoupler replacement (e.g., SFH617A) | | Ticking/clicking sound | Short on secondary side (e.g., tantalum capacitor) | Find shorted cap using thermal camera | | Low output voltage (e.g., +5V instead of +15V) | Current sense resistor (Pin13) drifted high | Replace 0.1Ω resistor | | Overheating at idle | Transformer primary leakage inductance or snubber diode shorted | Test snubber diode with multimeter | | No startup, but VCC present | Open capacitor on Pin 8 (soft-start) | Replace 4.7µF electrolytic |
Zener diodes or voltage dividers monitor the output voltage. Spikes that exceed the heater rating trigger a shutdown.
What (e.g., HP 1020 or Canon 2900) are you working on?
Features a solid-state triac switching system that cycles power directly to the ceramic heating element inside the fuser assembly to safely melt toner onto the paper. Key Sections of the RM1-2316 Schematic Replacement and Maintenance The exact you are seeing (e
Плата питания RM1-2316 для Canon LBP2900/ 3000/ 3000b
Ensure the power is completely disconnected. Remove the Covers: Remove the side panels to expose the internal components.
Commonly utilizing a robust high-voltage N-channel transistor like the 2SK2900 . Because there is no standalone PWM control chip, a network of discrete Zener diodes, bipolar junction transistors (BJTs), and a feedback winding on the main flyback transformer handle the frequency generation and switching rhythm. 3. Secondary Output and Feedback Regulation
The RM1-2316 is the high-voltage (220V–240V) variant. The corresponding 110V–127V version for North American and Japanese markets is part number Toner2Print.com Do you need specific troubleshooting steps
The RM1-2316 is a versatile part used across multiple brands and models: HP LaserJet Series: 1018, 1020, 1020 Plus. Canon LBP Series: LBP2900, LBP2900B, LBP3000. Alternate Part Numbers: Often interchangeable with or related to