March 2000 © TOSHIBA TEC
7-17
DP120F/DP125F Circuit Description
(1)
The CIS detects the LED array’s light reflected by a document as an analog electric
signal and sends it to the DSC (IC59).
(2)
The DSC converts the electric signal to a digital signal and subjects it to data correction,
then converts it to raster data. The raster data is serially transferred to the DSC interface
of the PTC GA (IC45).
(3)
The raster data is converted from serial to parallel data by the DSC interface of the PTC
GA and transferred to the PIX-DRAM (IC25). During this period, the system communi-
cates with the PC to identify the coding for the data to be transmitted.
(4)
The raster data is transferred to the CODEC (IC51) through the CODEC interface of the
PTC GA where it is coded to data in the JBIG format. Then the JBIG coded data is
transferred to the SYS-DRAM (DP120F: IC34, IC41/DP125F: IC46). This allows the
coded data for all the documents scanned to be stored in the SYS-DRAM.
(5)
The JBIG coded data is transferred to the CODEC where it is decoded to raster data.
Then the raster data is transferred to the PIX-DRAM.
(6)
The raster data is transferred to the CODEC where it is coded in the MH coding format.
Then the MH coded data is transferred to the PIX-DRAM.
(7)
The MH coded data is transferred to the PC interface of the PTC GA and sent to the PC
through the PC I/F PBA.
Summary of Contents for DP120F
Page 1: ...PLAINPAPERFACSIMILE File No 31200001 R0112216901 TTEC ...
Page 401: ...DP120F DP125F Circuit Description 7 92 March 2000 TOSHIBA TEC 07 05 00 Fig 7 5 1 ...
Page 656: ...DP120F DP125F Troubleshooting 11 44 March 2000 TOSHIBA TEC ...
Page 700: ...DP120F DP125F Appendix 12 2 March 2000 TOSHIBA TEC 1 2 Error Count List ...
Page 701: ...March 2000 TOSHIBA TEC 12 3 DP120F DP125F Appendix 1 3 Function List for Maintenance ...
Page 702: ...DP120F DP125F Appendix 12 4 March 2000 TOSHIBA TEC 1 4 Drum Unit ...
Page 703: ...March 2000 TOSHIBA TEC 12 5 DP120F DP125F Appendix 1 5 Memory Dump List ...
Page 706: ...SHUWA SHIBA PARK BLDG A 2 4 1 SHIBA KOEN MINATO KU TOKYO 105 8524 JAPAN ...