Facsimile Reception - Toshiba DP120F Service Manual

2.2 Facsimile Reception

(1) The analog data received from the telephone line is input to the MODEM (IC5) through
the NCU PBA.
(2) The analog data is demodulated to coded data by the MODEM. Then the coded data is
transferred to the SYS-DRAM (DP120F: IC34, IC41/DP125F: IC46).
(3) The coded data is transferred to the CODEC (IC51) through the CODEC interface of the
PTC GA (IC45) where it is decoded to raster data. Then the raster data is transferred to
the PIX-DRAM (IC25).
(4) The raster data is transferred to the CODEC where it is coded to data in the JBIG format.
Then the JBIG coded data is transferred to the SYS-DRAM. This allows all the coded
data received 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 PTC interface of the PTC GA.
(7) The raster data is serially transferred to the EET (IC39) where it is smoothed. Then the
raster data is serially transferred to the PTC interface of the PTC GA.
(8) The raster data is converted to print data by the PTC interface and sent to the LSU. The
LSU is driven according to the received print data for printing on the recording paper.
March 2000 © TOSHIBA TEC
Fig. 7-2-2
7-13 DP120F/DP125F Circuit Description
07-02-02