Procedures

Enter SP mode

SOP / IM C: Reset → 806182 → hold C. Then 5812# (phone on counter), 5810# (SC reset), 5990# (print SMC).

IM C, IM, MP C SOP. Old yellow-key panels still use 107.

SC reset (SP5-810)

Clear a latched Level A/B service call after the repair is actually done.

All GW / GW+ (IM C, IM, MP C)

Read SC history

The standing SC is rarely the whole story. History tells you what led up to it.

All models with SP5-990

Input / output check

Prove a sensor or motor before you replace it. SP5-803 in, SP5-804 out.

GW / GW+

Free run (SP5-801)

Run the engine without paper to hear a motor, see a belt, or reproduce a 500/440.

GW / GW+

Forced process control

Run MUSIC / process control after PCU, developer, ITB, or ID sensor work.

IM C and MP C color

Developer initialization

Init TD sensor / developer after a PCU or developer swap. Skipping this is a textbook SC325.

IM C, MP C

Fusing unit replacement

Swap the fuser on IM C / MP C without creating a 541/548 encore.

IM C, IM, MP C

PCU replacement

Replace a photoconductor / charge unit and leave process control green.

IM C, MP C, IM B&W (single PCU)

NVRAM backup and restore

SD upload/download so a controller or NVRAM swap does not wipe serial and counters.

GW / GW+

GW+ controller recovery

Hardware keys, DIP, and SD recovery when SOP will not boot (819/820/672 loops).

IM C, IM, MP C with GW / GW+

Firmware update from SD

Load a matched engine + controller set without leaving a 819/672.

GW / GW+

PM counter reset

Zero the PM counts for the part you actually replaced so the next call is honest.

All

Supervisor / admin lockout

When the site cannot log in and the supervisor password was changed.

SOP machines

ARMS / remote notes

What a field tech needs to know when ARMS is in play (2025+).

IM C with ARMS-capable firmware

Fuser wrap / jam recovery

Clear a wrap without destroying the belt or guaranteeing a 541.

All fusers