Samsung DVD-P241 free download

File name 27095303843_CH7.pdf

7. Circuit Operating Descriptions 7-1 Power 7-1-1 Comparsion between Linear Power Supply and S.M.P.S. 7-1-1 (a) Linear Vout REGULATOR + Vp (Np) ­ + Vs ­ (Ns) + Vreg Common power (Ex.120V 60Hz) Fig. 7-1 Linear Power Supply Waveform/Description Vp 0 t Input : Common power to transformer (Vp). Fig. 7-2 Vs The output Vs of transformer is determined by the ratio of 1st Np and 2nd Ns. Vs = (Ns/Np) x Vp 0 t Fig. 7-3 Vout 0 t Vout is output (DC) by diode and condensor. Fig. 7-4 Samsung Electronics 7-1 Circuit Operating Descriptions Advantages and disadvantages of linear power supply 1) Advantages : Little noise because the output waveform of transformer is sine wave. 2) Disadvantages : OE Additional margin is required because Vs is changed (depending on power source). (The regulator loss is caused by margin design). ґ Greater core size and condensor capacity are needed, because the transformer works on a single power frequency. v Vout Change by common power Vreg 0 Regulator loss Fig. 7-5 t 7-1-1 (b) S.M.P.S. (Ringing Choke Converter methol) Transformer (Np) (Ns) + + (Vp) (Vs) ­ ­ + + Vin Switch + Vs switch ­ I switch Vout REGULATOR Vreg ON/OFF Control Fig. 7-6 Terms 1) 1st : Common power input to 1st winding. 2) 2nd : Circuit followings output winding of transformer. 3) f (Frequency) : Switching frequency (T : Switching cycle) 4) Duty : (Ton/T) x 100 7-2 Samsung Electronics Circuit Operating Descriptions 7-1-2 Circuit description [FLY-Back RCC(Ringing Choke Converter)] Control 7-1-2 (a) AC Power Rectification/Smoothing Terminal 1) PDS01, PDS02, PDS03, PDS04 : Convert AC power to DC(Full wave rectification). 2) PEF10 : Smooth the voltage converted to DC. 3) PLS01, PBS01 : Noise removal at power input/output. 4) PVA1 : SMPS protection at power surge input. 7-1-2 (b) SNUBBER Circuit : PDS11, PCD12, PER13, PRS13 Vswitch Inverted power by leakage inductance dt 1) Prevent residual high voltage at the terminals of switch during switch off/Suppress noise. High inverted power occurs at switch (PQR11) off, because of the 1st winding of transformer : (V=-L1 xdi/dt. L1 : Leakage Induction) A very high residual voltage exist on both terminals of PQR11 because dt is a very short. 2) SNUBBER circuit protects PQR11 from damage through leakage voltage suppression by RC, (Charges the leakage voltage to PDS11, PER13, PCD12 and discharges to PRS13). 0 Toff t Fig. 7-7 7-1-2 (c) Driving circuit When Vin supplied, driving current Ig occurs throuhg the PRR11. By this IC (=Hfe x Ig) occurs throug the PQR11 and the Vb is inducted to base winding coil NB of PQR11. By inducted Vb, Ib start flow and the PQR11 is saturated (S/W ON). Ib is constant and Ic increases in Proportion to time. After constant time passed Ib become to shortage and PQR11 is cut OFF (S/W OFF). Fig. 7-8 Driving Circuit Samsung Electronics 7-3 Circuit Operating Descriptions 7-1-2 (d) Feedback Control Circuit A K Fig. 7-9 Operation descriptions 1) Internal OP-Amp `+'

File name 27095303843_CH8.pdf

No focus incoming No pick-up home positing Samsung Electronics Check RIC1 and A, B, C, D input. ZIC1-191(SLED-PWM) output is normal? (1.7V ~ 1.8V) No Check ZIC1. Yes No Check FIC1. SLED+, SLEDFIC1-32, 33 output are normal? Yes Check FIC1. Check the Sled Motor and connection. A 8. Troubleshooting FE in ZIC1-181 is within specified range? No Yes FIC1-27, 28 output are normal? No Yes Check open state from FIC1 to pick-up. 8-1 8-2 No Search Operation No No MEVO, RIC1-32 output level is normal? Check RIC1 MIRR, RIC1-27 output is normal? Yes Yes Check pick-up. Check RIC1 peripheral circuit. Actual velocity occurs at ZIC1-191 terminal? Open check in related circuit. Yes No Check ZIC1 peripheral circuit. Actual velocity occurs at FIC1-32, 33 terminal? Yes No Check FIC1 peripheral circuit. TE occurs in search range? No Focus On? No A Yes See "Fine Seek Check" NO LD CD ON Troubleshooting B RIC1-21 is 5V? No Yes Divide RQ2 emitter terminal voltage and 5V real voltage difference into 10ohm. Yes Current exceeds 0.1A? No Yes LD out pick-up replace. Samsung Electronics Samsung Electronics Abnormal rotation of disc motor Input of RF SUM signal is normal? (ZIC1-172, 173) No RIC1-54, 55 output is normal? Yes Check RIC1 peripheral circuit and A, B, C, D. Check path to RIC1 and ZIC1. SPD output is normal? (ZIC1-189) Yes Check ZIC1 peripheral circuit. ZIC1-169(TRD) output is normal? No No No Yes Yes Check RIC1-39 terminal. FIC1-36, 35(T+, T-) terminal outputs are normal? No Yes Check FIC1 peripheral circuit. FIC1-35 output is normal? Yes No Check FIC1 soldering and power. FIC1-22 signal MON is "H" ? Yes No Check ZIC1. Check or replace disc motor. FINE SEEK Check FINE SEEK MIRR signal (RIC1-27) is missing? Yes Check RIC1 Peripheral curcuit. No Track incomming is delayed? No Time out due to many jump counts. Yes TE is within 2V and 3V? No Yes Pick-up transfer smooth. No Yes Check Deck. Check SIC1 peripheral circuit. Check DCN1 and pick-up. Troubleshooting 8-3 8-4 CD/VCD/DVD L/R output error (Mixed Audio output) No Check ZIC1 perpheral circuit. Yes Normal DATA 0 is input in AIC2-2? Check ZIC1-113 output. No Analog output of AIC2-7, 8(Vout) is normal? No No Check FIC1 perpheral circuit. Yes Check ZIC1-118 (CD/VCD ; 16.9344MHz, DVD ; 18.432MHz) AIC4-1, 7 output is normal? Yes No Check AIC4 peripheral circuit. Base terminal level of AQ1, AQ3 are "L"? Yes No Check ZIC1-106 mute. Check JACK1 peripheral soldering shot. Troubleshooting No Tray open/close ZIC1-147, 149 Open ; "L" Close ; "H" Yes Check FIC1-14, 15 output at OPEN/CLOSE. Yes Check signal line state from FIC1-14, 15 to tray motor. Samsung Electronics S-Video output error Y/Pr/Pb output error Samsung Electronics Select video output to "S-VIDEO". Select video output to "525I". Video output of display setup is "525I". Yes C No Video output of display setup is "S-VIDEO". No Yes C Troubleshooting 8-5 8-6 CVBS output error C Pin of VDDP in ZIC1 has normal l

File name 27095303843_CH9.pdf

9. Block Diagram DECK ASS'Y (DP-15) Remote Control ZIC2 SDRAM Pick-up & I/V Amp ZIC5 2KBit EEROM Spindle Motor Feed Motor RIC1 (SP3723) RF Amp & DPD CSS INPUT FIFO & DEMUX ZIC1 (Vaddis-6) A/V Decoder DTS Bitstream Optical IEC958/1937 Coaxial Lt Rt AUDIO DSP Down-L/R AIC2 (PCM1742) 2-CH Audio DAC Post Filter Post Filter FIC1 (FAN8004) Actuator & Motor Driver A/V Decoder AC3 & MPEG 5.1 Compo VIC1 (LA73054) CVBS Yout Cout Y/B/Pb Video Encoder (4DAC) 6dB AMP C/R/Pr Post Filter 6dB AMP R/Pr B/Pb G/Y Comp/G/Y Samsung Electronics This Document can not be used without Samsung's authorization. 9-1 Block Diagram MEMO 9-2 This Document can not be used without Samsung's authorization. Samsung Electronics

File name 27095303843_COVER.pdf

DVD PLAYER Chassis : Trino DVD-P241 TRAINING MANUAL DVD-P241 TRAINING DVD PLAYER Manual CONTENTS 1. Precautions ELECTRONICS 2. Reference Information 3. Product Specification 4. Operating Instructions 5. Disassembly and Reassembly 6. Alignment and Adjustment 7. Circuit Operating Description 8. Troubleshooting STANDBY/ON EZ VIEW LOADING 9. Block Diagram 10. Wiring Diagram 11. Schematic Diagrams This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable international and/or domestic law. © Samsung Electronics Co., Ltd. DEC. 2003 Printed in Korea AK82-00419A