HP 4 C2001A, C2021A, 5n C3952A, 5 C3916A, 5m C3917A manual Warmup Period, Standby Period, PowerSave

Warmup Period

The Warmup period begins when the printer’s power is turned ON, and ends when the fusing roller temperature reaches 172° C. When the printer is switched ON, the exhaust fan (FM1) begins low-speed rotation and the fusing roller maintains 172° C. The DC controller then switches the main motor (M1) ON, and applies AC high voltage to the primary charging roller to remove any residual charge from the photosensitive drum. Negative high voltage is applied to the transfer roller to clean toner build-up from the roller. When the fusing roller reaches 172° C, the main motor, and AC high voltage, are turned OFF.

After the power is switched on, the Main Motor (M1) and the pickup motor (M2) turn for approximately 4 seconds to clear the paper path. The motors stop rotation when the fuser reaches 172° C.

After the printer warms up, the message 00 READY is displayed, the printer goes “on-line,” and the control panel keys become operational.

Standby Period

When the Warmup period is completed, the message 00 READY is displayed. At this point the printer is in the Standby period. This indicates that the printer is ready for printing. The fusing roller remains at a constant temperature of 172° C, and the exhaust fan continues operating at low-speed rotation.

PowerSave

When the printer enters PowerSave mode, fuser current is shut down, allowing the fuser to cool to room temperature without posting a 50 SERVICE error. The exhaust fan continues to operate at low speed.

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