Rm1-2316 Schematic Here

When searching, do not just type “Rm1-2316 schematic” – include or A2A1 assembly diagram , because the Rm1-2316 is only one component on a larger board.

| 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 | Rm1-2316 Schematic

| Pin/Section | Function | Common Components | | :--- | :--- | :--- | | | AC Input / High Voltage DC | Bridge diode, 400V cap | | Pin 3 | Ground (Primary Side) | Isolated return | | Pin 4 | VCC (Control IC supply) | 12V-18V zener, startup resistor | | Pin 5 | Feedback Input | Optocoupler collector (e.g., PC817) | | Pin 6 | Current Sense | Small resistor (0.1–0.5 ohm) to ground | | Pin 7 | Gate Drive Output | To external MOSFET (e.g., IRF840) | | Pin 8 | Soft-Start / Timing | External capacitor (1-10µF) | When searching, do not just type “Rm1-2316 schematic”