Toshiba ESTUDIO170F, Service Manual

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January 2005 © TOSHIBA TEC e-STUDIO170F Circuit Description
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[ 2 ] PC Facsimile Transmission
There are the following two PC facsimile transmission modes: the PC direct transmission mode in
which the document data sent from the PC is transmitted page by page and the PC indirect transmis-
sion mode in which all the document data is read and stored in memory before being transmitted.
Fig.7-16
* Details regarding each area of SDRAM used
(2): PC I/F > SDRAM (PIX area: PC buffer)
(3): SDRAM (PIX area: PC buffer) > SDRAM (PIX area: CODEC buffer)
(4): SDRAM (PIX area: CODEC buffer) > SDRAM (SYS area: Image memory)
(5): SDRAM (SYS area: Image memory) > SDRAM (PIX area: CODEC buffer)
(6): SDRAM (PIX area: CODEC buffer) > SDRAM (SYS area: Transmit data buffer)
(7): SDRAM (SYS area: Transmit data buffer) > MODEM I/F
(7)
(3)
(4) (5) (6)
(1)
(2)
PC
NCU PBA
DSC I/F MODEM I/F PC I/F PTC I/F CODEC I/F
SDRAM controller
IC27
DSC
IC49
USB controller
IC53
MODEM
IC16
CODEC
PIX area* SYS area*
IC1 IC1
SDRAM SDRAM
IC1
SDRAM
PSTN
IC15
ASIC
(Engine controller)
Main PBA