Dell 1815dn Service Manual - Page 20
FAX SDRAM : is used as Swath Buffer in Printing, Scan Buffer in Scanning - parts diagram
UPC - 000061100008
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System Outline 3) SDRAM : is used as Swath Buffer in Printing, Scan Buffer in Scanning, ECM Buffer in FAX receiving, and System Working Memory Area - size : 64Mbyte(Basic) , 96Mbyte(Duplex) 4MB : System Working Memory Area and Scan Buffer 4MB : FAX Memory Receive Area 16MB : Printing System Working Memory Area - Max Frequency : 166MHz - store Fax Receive Memory Data by using Battery 4.1.2 FAX Section Modem Part BLOCK DIAGRAM Implemented by based on Conexant DAA (Data Access Arrangement) Solution, and is roughly composed of two kinds Chip Solution - CX86710 (SFX336): 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. 4-2 Service Manual