Samsung SF-335T Repair Manual

Also see for SF-330 Series: Quick install guide Operating instructions User manual Service guide

Contents

CIRCUIT DESCRIPTION2. operation descriptionThis system, when Host and USB cables are connected, and when +5V is detected in power detector inside chip and Vbus,3.3V comes out through Pull-uP terminal. This is also connected to DP in pattern of hardware and supports Full-speed. UtilizingConfiguration Endpoint, EPO, in USB controller, Plug & Play function is operated. Exchange of information between PCs isaccomplished through DP and DM erminals. This terminal decides transmission speed depending on connection of regulatoroutput in USB controller, and decides size of signal following USB and SPFC. Signal of general DP and DM terminals are sameas Figure 10-3.<8> HEAD Control Part1. General InformationIt drives the Inkjet Head, and it controls the HA[3:0] and _STB[5:0], which control the Six-Shooter. The Six-shooter creates thesignal to drive 48 Nozzle of the HEAD. The Stubby Head in the system is the Bubble type head, and has 48 nozzle for theMono and Color(Printer only). 48 Nozzle Head of the mono and color head receives the data by 6 bytes per1 slice. The datafrom the HDMA goes to the CDE (Consecutive Dot Eliminator), DITH, and Data Out Block, and the data and address, controlledby the Fire signal and the Fire Window Time of the CRCON_CRFIRE Block, are outputted to the head Driver (Six-Shooter).The head consists of the 4 firing groups. Each group has 12~14 nozzles, and only one nozzle is firing per a Fire in each group.It means that one Fire can make 4 nozzles firing.< Figure 10-3. USB Signal Line DIAGRAM >< Figure 12. Print48(HP) Firing Timing >