TOSHIBA Signal Flow free download

File name Signal Flow.pdf

Copying Original Drum Exposure lamp CCD LSU IC3 A/D converter Scanner unit IC11 5 Scanner contorol IC68 GA EET 1 4 Scanner PTC I/F IC36 I/F PTC GA 2 CODEC I/F-2 IC9,13,15,19 3 PIX-SDRAM IC67 64Mbit x4 CODEC This machine has two patterns of copying process. Copying 1 The light irradiated by the exposure lamp to the original is reflected. Then the CCD reads the reflected light. The CCD converts the light to an electric signal, and outputs it to the A/D converter (IC3). The A/D converter converts the electric signal into digital data, and outputs it to the Scanner control GA (IC11). The Scanner control GA corrects the image data, and outputs it to the Scanner interface of PTC GA (IC36) as raster data. 2 The Scanner interface converts the raster data into the parallel. Then the data is DMA transferred to PIX-SDRAM (IC9, 13, 15, 19) and stored. 3 The raster data is DMA transferred to PTC Interface of PTC GA. 4 The PTC interface transfers the raster data to the EET (IC68) serially. The EET transfers the raster data to the LSU. (The EET doesn't provide smoothing for the raster data, and transfers it to the LSU.) 5 The LSU applies the laser beam onto the drum based on the print data, and forms a latent image on the drum. The toner adheres on the drum according to the latent image. Then the data is printed out by transferring the toner onto the recording paper. Memory Copying Original Drum Exposure lamp CCD LSU IC3 A/D converter Scanner unit IC11 9 Scanner contorol IC68 GA EET 1 8 Scanner PTC I/F