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Service Guide ML520/521

Chapter 2 Principles of Operation

LSI

Location 04B: MSM79VO35

Detects the output of the two-phase sensor on the DC space motor to control the motor drive phase.

Transmits and receives serial data to and from the printhead based on the dot timing (which is derived from the space motor speed).

Controls the external interface. The LSI is connected to the MPU.

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Oki ML520, ML521 manual Lsi