DP120F/DP125F Mechanical Description
5-12
March 2000 © TOSHIBA TEC
3.3 Laser Scanner Area
3.3.1 Outline
The laser scanner area consists of the laser diode part, polygon part, and reflecting part.
The laser diode part generates a laser beam according to the laser diode drive signal sent from
the Main PBA. The laser beam is compensated to parallel rays through the Collimator lens and
then passes through the Slit and Cylinder lens. A laser beam of parallel rays is sent to the
polygon part. The laser diode part checks the current value flowed to the laser diode by each
line to keep the laser beam volume stable. The polygon part consists of the Polygon motor and
Polygon mirror. The Polygon motor turn the Polygon mirror at a uniform rate for laser beam
scanning. The laser beam generated in the laser diode part is sent to the reflecting part of the
Polygon mirror. The F
θ
lens and Reflecting mirror1, 2 bend the optical path of the laser beam
and then the beam is focused on the drum.
As the Polygon mirror turns at a uniform rate, the laser beam scans on the drum at a uniform
rate. This operation forms the image on the drum surface like a television.
The laser beam is also sent to the Start sensor by the Polygon motor and Polygon mirror.
Each time the Start sensor receives the laser beam, it sends a signal to the Main PBA. The
Main PBA uses this signal to determine the print start position of each line.
Fig. 5-3-4
05-03-04
Laser diode
unit
Collimator lens
Polygon motor
Drum
Start sensor
F
θ
lens
Polygon mirror
Cylinder lens
Slit
Reflecting
mirror 1
Reflecting
mirror 2
Содержание DP120F
Страница 1: ...PLAINPAPERFACSIMILE File No 31200001 R0112216901 TTEC ...
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Страница 316: ...March 2000 TOSHIBA TEC 7 7 DP120F DP125F Circuit Description 1 2 Block Diagram 07 01 10 Fig 7 1 7 ...
Страница 337: ...DP120F DP125F Circuit Description 7 28 March 2000 TOSHIBA TEC 3 1 Memory Circuit Fig 7 3 1 07 03 01 ...
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Страница 401: ...DP120F DP125F Circuit Description 7 92 March 2000 TOSHIBA TEC 07 05 00 Fig 7 5 1 ...
Страница 579: ...March 2000 TOSHIBA TEC 9 15 DP120F DP125F Dialing and Communication Procedure b Standard procedure ...
Страница 654: ...DP120F DP125F Troubleshooting 11 42 March 2000 TOSHIBA TEC 2 3 Flow Chart Recommended for Field Service ...
Страница 655: ...March 2000 TOSHIBA TEC 11 43 DP120F DP125F Troubleshooting 2 4 Flow Chart Recommended for Telephone Screening ...
Страница 656: ...DP120F DP125F Troubleshooting 11 44 March 2000 TOSHIBA TEC ...
Страница 699: ...March 2000 TOSHIBA TEC 12 1 DP120F DP125F Appendix Chapter 12 Appendix 1 Sample List 1 1 Protocol Trace List ...
Страница 700: ...DP120F DP125F Appendix 12 2 March 2000 TOSHIBA TEC 1 2 Error Count List ...
Страница 701: ...March 2000 TOSHIBA TEC 12 3 DP120F DP125F Appendix 1 3 Function List for Maintenance ...
Страница 702: ...DP120F DP125F Appendix 12 4 March 2000 TOSHIBA TEC 1 4 Drum Unit ...
Страница 703: ...March 2000 TOSHIBA TEC 12 5 DP120F DP125F Appendix 1 5 Memory Dump List ...
Страница 706: ...SHUWA SHIBA PARK BLDG A 2 4 1 SHIBA KOEN MINATO KU TOKYO 105 8524 JAPAN ...