Xerox WORKCENTRE PE 220, Service Manual

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General Procedures and Information
Workcentre PE 220 11/05 6-17
• 256 Gray Scale
3) CIS Driving
- CIS Supply Voltage: +3.3V
- CIS Max frequency: 5MHz
- CISLinetime
• Fax/Copy - 1.5ms
• PC-Scan - 4.5ms
- White output volt.: Max 0.8V
4) ADF Driving: Driving ADF Stepper motor, and the maximum motor speed is 2000PPS.
- MOTOR DRIVER: A3978(Allegro)
- Driving Voltage: 24V DC
- Phase: 2-2 Phase 2000PPS at Quick Scan,
2-2 Phase 1000PPS AT Fine Scan,
2-2 Phase 667PPS AT Super Fine Scan
Fax Modem
1) Modem
The modem consists of FM336 (FAX Modem chip), LIU (Line Interface Unit) and modem ana-
log front end (AFE) functional part.
- The feature of the FM336 modem chip is as below;
1 Communication Mode: Half Duplex
2 Modem Method
- GROUP 3: ITU-T V34, V17, V29, V27ter
- Tonal Signal: ITU-T T.30
- Binary Signal: ITU-T V.21, T.30
3 Image Transmission Time: 3sec (ITU-T NO.1 CHART/Memory Tx/ECM)
4 Data Compress: MH, MR, MMR, JPEG
5 Modem Speed: 33600 / 28800 / 14400 / 12000 / 9600 / 7200 / 4800 / 2400 bps
6 Receive Level: 0 ~ -48dBm
7 Output Level
- Adjustable: -6 ~ -15dBm (1dBm Step)
- Initial Setting: -12dBm
8 Receive dynamic range:
- 0 dBmto-43 dBmfor V.17,V.29,V.27 ter and V.21
- -9 dBm to -43 dBm for V.34 halfduplex
2) The Gain of the Line signal can be adjusted by setting the register value of the FAX modem
chip,Tx and Rx path and is almost directly connected to the impedance matching transformer of
the LIU.
- Adjust Tx Level within Setting Level+0,-2dB range.
- Adjust Rx Level that has the same level as the TIMS out level if possible, and must not