Schematic | Rm1-2316

: Designed for 220V–240VAC operation (+/- 10%).

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 Rm1-2316 Schematic

The schematic shows the input power path. A blown fuse on the is the most common "quick fix." : Designed for 220V–240VAC operation (+/- 10%)

If found on a :

If you have a physical board, look for these : A blown fuse on the is the most common "quick fix

AC Line → Bridge Rectifier → Bulk Capacitor (C1, 100µF/400V) | +---> R_start (2x 150kΩ series) --> Pin 8 (HV) | +---> R_brownout (1.2MΩ) --+--> Pin 5 (B/O) | | +--- R_brownout2 (100kΩ) ---+--- GND | Pin 7 (OUT) --- R_gate (22Ω) ---+--- Gate of MOSFET (Q1, e.g., 4N60) | Pin 3 (CS) --- R_sense (0.33Ω) ---+--- Source of MOSFET | Pin 6 (SS) --- C_ss (1µF) --- GND