Schematic | Rm1-2316

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.

+24V output --- R_divider_top (47kΩ) --+---> TL431 Ref | GND --- R_divider_bottom (10kΩ) --------+ | TL431 Cathode --- Optocoupler LED (PC817) --- +24V via R_bias (1kΩ) Optocoupler Transistor --- Pin 2 (FB) of RM1-2316 Rm1-2316 Schematic

This power board is widely cross-compatible across several entry-level laser printer models: : 1018, 1020, 1020 Plus. Canon LBP Series : LBP2900, LBP2900B, LBP3000. Key Components in the RM1-2316 Layout Unplug the printer and check for continuity on the main fuse