Sanyo VPC-S6U Service Manual

Also see for VPC-S6: User guide

Contents

– 4 –Fig. 1-3. IC901 Block Diagram3. Part of IC905 (H Driver) and IC901 (V Driver)An H driver (part of IC905) and V driver (IC901) are neces-sary in order to generate the clocks (vertical transfer clock,horizontal transfer clock and electronic shutter clock) whichdriver the CCD.IC905 has the generation of horizontal transfer clock and thefunction of H driver, and is an inverter IC which drives thehorizontal CCDs (H1 and H2). In addition the XV1-XV6 sig-nals which are output from IC101 are vertical transfer clocks,and the XSG signal is superimposed onto XV1, XV3 and XV5at IC901 in order to generate a ternary pulse. In addition, theXSUB signal which is output from IC101 is used as the sweeppulse for the electronic shutter, and the RG signal which isoutput from IC905 is the reset gate clock.Fig. 1-4. IC905 Block Diagram4. IC905 (H Driver, CDS, AGC and A/D converter)IC905 contains the functions of H driver, CDS, AGC and A/Dconverter. As horizontal clock driver for CCD image sensor,HØ1 (A and B) and HØ2 (A and B) are generated inside, andoutput to CCD.The video signal which is output from the CCD is input to pins(27) of IC905. There are sampling hold blocks generated fromthe SHP and SHD pulses, and it is here that CDS (correlateddouble sampling) is carried out.After passing through the CDS circuit, the signal passesthrough the AGC amplifier (VGA: Variable Gain Amplifier). Itis A/D converted internally into a 10-bit signal, and is theninput to ASIC (IC101). The gain of the VGA amplifier is con-trolled by pin (31)-(33) serial signal which is output from ASIC(IC101).1332333130373835363442434439404142613141211SUBCNTVDCCH1V1V6V4V5RV5LV3RV3LV1SCH5V5CH3CH4V3CH2GNDVHOV3BOV3AOV5BOV5ALevelconversion29V22 SUBLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversionLevelconversion28RESET20OV18VM21OV623OV424OV227VL10OSUB9VMSUB5VL2-level2-level2-level3-level2519171518VMOV1SOV3LOV3ROV5L716 OV5RVHH6 VH2-level2-level2-level2-level2-level3-level3-level3-level3-level3-levelCCDINRGH1-H4VDHD SDATASCKSLCLIHBLKCLP/PBLKDOUTREFBREFTPRECISIONTIMINGCORESYNCGENERATORPxGA VGA 10-BITADC106~42 dBVREFCLAMPINTERNALREGISTERSINTERNALCLOCKSCDSHORIZONTALDRIVERS40~18 dBAD9948