Rm1-2316 Schematic Page

| Block | Function | |-------|-----------| | | Connects to rectified DC (320V) via pin 8; provides initial charge to VCC cap. | | PWM Oscillator | Fixed frequency ~65 kHz (frequency jittering for EMI reduction). | | Current Sense Comparator | Monitors MOSFET source resistor via pin 3 (CS). | | Feedback Amplifier | Optocoupler input (from secondary side TL431) connects to pin 2 (FB). | | Soft-Start | Gradual increase of duty cycle at startup (pin 6 capacitor). | | Brownout Detector | Monitors bulk capacitor voltage via resistor divider to pin 5. | | Output Driver | Totem-pole output to external power MOSFET gate (pin 7). |

Unplug the printer and check for continuity on the main fuse. Inspect for burnt components on the board. Symptom: Motor Spins but Lights Do Not Come On Diagnosis: The rail is missing, while the rail is active. Rm1-2316 Schematic

This analysis details the schematic topology, input/output characteristics, and troubleshooting logic for the RM1-2316. | Block | Function | |-------|-----------| | |

The board functions as a Switch Mode Power Supply (SMPS) that converts mains AC voltage into the various DC levels required by the printer's internal logic and mechanical components. Garg Computers Circuitry and Key Components | | Feedback Amplifier | Optocoupler input (from