Fax Section - Dell 1600n - Multifunction Laser Printer B/W Service Manual

Circuit Diagram

11.2 FAX Section

11.2.1 Modem Part
11.2.1.1 BLOCK DIAGRAM
DSP
Implemented by based on Conexant DAA (Data Access Arrangement) Solution , and is roughly composed of two
kinds Chip Solution
- CX82500(SFM336) : Existing Modem Chip which adds SSD (System Side Device) for interfacing between -
- LSD and DIB of FM336Plus Core
- CX20493(LSD) : LIU (Line Interface Unit) Chip which is controlled by SSD and satisfies each PSTN
requirements by modulating internal Configuration with connecting Tel Line.
Service Manual
11-4
Transformer
SSD
System
Side
Dervice
Capacitor
CX20493
LSD
Line
Side
Dervice
Ext Line