Xerox Phaser 3300 - FAX Section

Phaser 3300MFP Service Manual 2-19
Theory of Operation
Regulating Blade
■ Type: Regulating toner layer by pressure
■ Valid Length: 228 mm
■ Voltage: -420 V ~ -600 V
Charging Portion
■ Type: Conductive Roller Contact-Charge
■ Rotary Velocity: 179.7 mm/sec
■ Length: 230 mm
■ OD: ϕ 12.0 ± 0.05 mm
■ Shaft OD: ϕ 6 + 0 / -0.05 mm
■ Driver: Gear Driver
■ Roller life: 8.000 sheets or more
■ Roller Voltage: -1.25 ~ -1.70 KV
FAX Section
Modem 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 FM 336 Plus 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.
s3300mfp-155
Modem
CX86710(SFX336)
DSP
SSD
System
Side
Device
Transformer
Transformer
CX20493
LSD
Line
Side
Device
Tel Line
Ext Line
LIU
SDAA
Sound Output
MC14051BD
Volume/Keyclick
Control
MC34119DR2
Speaker
Driver