Toshiba DP120F Service Manual page 329

2.4.3 PC 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 (IC51) 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 CODEC where it is coded in accord with the coding
format (MH, MR or MMR) specified by the PC. Then the coded data is transferred to the
PIX-DRAM.
(7) The coded data is transferred to the PC interface of the PTC GA and sent to the PC
through the PC I/F PBA.
DP120F/DP125F Circuit Description
Fig. 7-2-6
7-20
07-02-06
March 2000 © TOSHIBA TEC