Toshiba DP120F Service Manual page 265

• ADF roller
The ADF roller is driven by the TX motor and automatically feeds the document pages to
the TX drive rollers. The feed speed of the ADF roller is slower than the TX drive rollers.
Accordingly, a one-way clutch is attached to the ADF roller, to allow the ADF roller to turn
freely in one direction.
• ADF unit
The ADF unit prevents more than one document page from being fed when multiple page
documents are loaded for transmission. It feeds pages one by one utilizing friction.
(Refer to Page 5-3.)
• Document sensor
When a document is set in the Document guide area, the sensor turns ON and detects
the presence/absence of the document. The Document sensor is located on the bottom
of the Scanner cover.
(Refer to Page 6-10).
• Document position sensor
This sensor detects the document top and bottom edges at the CIS unit. When the top
edge is detected, the unit goes to the standby mode, During a multi-page transmission, it
detects the beginning of a new page. When the bottom edge is detected, the unit deter-
mines the length of time since the last top edge to decide if a document jam is occurred.
During a multi-page transmission, the bottom edge of the last page detects the end of the
transmission.
March 2000 © TOSHIBA TEC 5-5 DP120F/DP125F Mechanical Description