WorkCentre 3210/3220 Multifunction Printer Service Manual
2-31
Theory of Operation
Line Interface
Line Interface is connection part between system and PSTN (Public Switched
Telephone Network), and primary circuit is usually located. The main
functions are Line Interface, Telephone Connection, and Line Condition
Monitoring.
Telephone Line Connection
1.
Modular Plug: RJ-11C
2.
LIU PBA Modular Type: 623 PCB4-4
3.
Line Code Length: 2500 mm ± 50 mm
4.
Line Code Color: Black
On HOOK State Characteristic
1.
DC Resistance
■
DP Dial Mode (Direct Current 30 mA): 50~300 Ohm
■
DTMF Dial Mode (Direct Current 20 mA): 50~540 Ohm
2.
Ring Sensitivity
a.
Ring Detection Voltage: 40 Vrms~150 Vrms
(condition: Current = 25 mA, Frequency =15 Hz)
product Margin: 30 Vrms~150 Vrms
b.
Ring Detection Frequency: 15.3 Hz~68 Hz
(condition: Voltage = 45 Vrms, Current = 25 mA)
product Margin: 15 Hz~70 Hz
c.
Ring Detection Current: 20 mA ~ 100 mA
(condition: Voltage = 40 Vrms, Frequency = 20 Hz)
product Margin: over 15 mA
3.
False Ring Sound
a.
Ring Frequency: 750 Hz + 1020 Hz
b.
Ring Interrupt Cycle: On/Off depending on input Ring Signal Cycle.
Summary of Contents for 3210 - workcentre b/w laser
Page 1: ...WorkCentre 3210 3220 Multifunction Printer WorkCentre 3210 3220 Service Manual ...
Page 2: ......
Page 22: ...xx WorkCentre 3210 3220 Multifunction Printer Service Manual ...
Page 56: ...1 26 WorkCentre 3210 3220 Multifunction Printer Service Manual General Information ...
Page 92: ...2 36 WorkCentre 3210 3220 Multifunction Printer Service Manual Theory of Operation ...
Page 200: ...5 42 WorkCentre 3210 3220 Multifunction Printer Service Manual Print Quality Troubleshooting ...
Page 201: ...6 Chapter Adjustments and Calibrations In this chapter Adjustments ...
Page 204: ...6 4 WorkCentre 3210 3220 Multifunction Printer Service Manual Adjustments and Calibrations ...
Page 214: ...7 10 WorkCentre 3210 3220 Multifunction Printer Service Manual Cleaning and Maintenance ...
Page 342: ...8 128 WorkCentre 3210 3220 Multifunction Printer Service Manual Service Parts Disassembly ...
Page 380: ...9 38 WorkCentre 3210 3220 Multifunction Printer Service Manual Parts List ...
Page 414: ...1 8 WorkCentre 3210 3220 Multifunction Printer Service Manual Index ...
Page 415: ......