Samsung VP-D353 Service Manual

Also see for SC-D351: Owner's manual Owner's instruction manual Owner's instruction book Owner's instruction book Owner's instruction book

Contents

Circuit Operating Description13-10 Samsung Electronics13-4-5 PRML Block H/W Demand matterAt PRML BLOCK, it is Control Signal of Micro Processor to Serial Enable/Data/Clock. In each mode star (SP-PB, LP gas-PB, SP-Forward/Reverse Search, LP gas-Search, SP-Slow, LP gas-slow etc) You must be made tocarry out data control. moreover, Head S/W Pulse is inputted, the signal of the High section of an incomingsignal (Envelope Output) and the Low section is divided at the time of reproduction, and signal processing isrealized continuously as You have to become Control. In response to the control signal of Power Down fromDV-1chip (Channel Block), PB-High, and Adaptive High, operation is stopped between Recording Time(Power Down), and normal signal processing operation is control(ed) between Playback Time. You have toperform Playback operation by making and supplying 41.85MHz PB Clock and PB Data by DV-1chip (ChannelBlock). When the unstable incoming signal by the 41.85MHz signal is inputted from a PREAMP way from DV-1chip (Channel Block) (Search Mode or tape damage etc), this signal and it is made to perform stable inreproduction operation. PREAMP to Differential Function(s), such as the supply receptacle AGC, Dropout,Analog qualizer, Digital Equalizer, 1+D, and Viterbi, are carried out for the reproduction print-out signal ofinput (DIP, DIN). PB data of 41.85Mbps(es) is supplied by DV-1chip (Channel Block). X2 process must beperformed for 20.925MHz which is the highest frequency of a reproduction signal to a reproduction signal,and 41.85MHz PB clock must be supplied by DV-1chip (Channel Block). ATF Signal Processor is performedfrom a reproduction print-out signal, and it is ATF of F0/F1 (465kHz)/F2 (697.5kHz).ATF Error Signal forcoltrol is made.It supplies by Micro Processor and must be made to have to use by the object for CapstanControl.A two-sort power supply (3.3Vdc and 1.8Vdc) is supplied from DC/DC.It uses with a power supply of operation and the standard power supply of block required for control of thesignal for control with the exterior. Internal 1.8V regulator can be operated by Exterior option (pull up or pulldown). At this time, the external country can be used in the 3.3V single country.