Samsung ML-3471ND/XAX Service Manual page 26

2.2.2.7(c) Supply Roller
Rotary Speed : 131.98 mm/sec
Roller Bias : -370V ~ -550V
Control Type : Bias
Roller material : Nylon Fur
- Structure : Closed cell
- Resistance : 0.6E+05 ~ 3.0E+06
- Hardness : 16 ~ 25 (Asker "C")
- Valid Length : 218 mm
- OD : 11.2 0.1 mm
- Shaft material : SUM 24L Non-electrolysis Ni. Coating
- Shaft OD : 8.2 mm + 0 / -0.05
- Driver : Gear Driver (in a direction opposed to D/R)
- Sponge Density : 0.45 ,
- Life : 10,000 sheets or more
2.2.2.7(d) REGULATING BLADE
Type : Regulating toner layer by pressure
Material : SUS 301 1/2H CSP t0.08
Valid Length : 228mm
Voltage : -420V ~ -600V
Regulating edge R value : 0.3
Pressure : 42 gf/cm
2.2.2.7(e) CHARGING PORTION
Type : Conductive Roller Contact-Charge
Rotary Velocity : 179.7 mm/sec
Surface potential : -760
Residual potential : -130 V or less (initial)
Control Type : Bias PWM Control
Roller material : Conductive elastic roller (Conductive NBR + SBR)
- Structure : Mono layer (Surface UV process)
- Resistance : 0.75E+06 ~ 5.0E+06 ( N/N cond.)
- Hardness : 50 3 (Asker "A")
- Length : 230 mm
- OD : 12.0 0.05 mm
- Shaft Material : SUM-24L + Non-electrolysis Ni Coating
- Shaft OD : 6 + 0 / -0.05 mm
- Driver : Gear Driver
- Pressure : L:300 gf / R:350 gf
- Roller surface roughness : Ra 1.8 um or less (shaft direction)
- Roller life : 10,000 sheets or more
Roller Voltage : -1.25 ~ -1.70 KV
Samsung Electronics
(N/N cond.)
0.1 g/
0.02mm
70V (based on OPC , N/N cond.)
Product specification and feature
Service Manual
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