January 2001 © TOSHIBA TEC
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GD-1060 CIRCUIT DESCRIPTION
The MODEM (IC4) installed on the FAX PWA receives analog signals from the telephone line through
the NCU PWA. Then the MODEM decodes the received analog signals into coded data.
The coded data is transferred in DMA mode to the system-SDRAM (IC32) where it is stored.
The coded data is transferred in DMA mode through the CODEC I/F-1 of the PTC GA (IC36) to the
CODEC (IC1) installed on the FAX PWA. Then the CODEC converts the coded data into the raster
data, and stores it in the SRAM (IC2,3).
The raster data is transferred in DMA mode through the CODEC I/F-1 to the PIX-SDRAM (IC9, IC13,
IC15, IC19) where it is stored.
The raster data is transferred in DMA mode through the CODEC I/F-1 to the CODEC. Then the
CODEC converts the raster data into the data coded in JBIG.
The JBIG data is transferred in DMA mode through the CODEC I/F-1 to the system-SDRAM where it
is stored. Then the received data or JBIG data is stored in the SDRAM.
The stored JBIG data is transferred in DMA mode through the CODEC I/F-1 to the CODEC. Then the
CODEC converts the JBIG data into the raster data, and stores it in the SRAM (IC2,3).
The raster data is transferred in DMA mode through the CODEC I/F-1 to the PIX-SDRAM where it is
stored.
The raster data is transferred in DMA mode to the PTC I/F of the PTC GA.
The PTC I/F serially transfers the raster data to the EET (IC68). The EET smoothes the raster data
and transfers it to the LSU.
The LSU irradiates a laser beam to the drum to form a latent image on it according to the raster data.
Then toner adheres to the latent image on the drum. The toner is transferred to the paper, thereby
printing the received data.