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Samsung DVD-907 Service Manual

Digital versatile disc player
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SERVICE
DIGITAL VERSATILE DISC PLAYER
DVD-907
DVD-927
DIGITAL VERSATILE DISC PLAYER
DVD-907/927
6. IC Descriptions
11. Electrical Parts List
Manual
CONTENTS

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Summary of Contents for Samsung DVD-907

  • Page 1: Table Of Contents

    DIGITAL VERSATILE DISC PLAYER DVD-907/927 SERVICE Manual DIGITAL VERSATILE DISC PLAYER CONTENTS 1. Precautions 2. Reference Information 3. Product Specification DVD-907 4. Operating Instructions 5. Disassembly and Reassembly 6. IC Descriptions 7. Circuit Descriptions 8. Troubleshooting DVD-927 9. Exploded Views and Parts List 10.

  • Page 2: Precautions

    See figure 1-2. metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Samsung Electronics...
  • Page 3 Additionally, determine the cause of overheating and/or damage and, if necessary, take corrective action to remove any potential safety hazard. Samsung Electronics...

  • Page 4: Servicing Precautions

    Components identified by shading, by( x ) or by ( ) in the circuit diagram are important for safety or for the characteristics of the unit. Always replace them with the exact replacement components. Samsung Electronics...

  • Page 5: Esd Precautions

    (4) Use ouly an anti-static solder removal devices. Some solder removal devices not classified as “anti-static” can generate electrical charges suffi- cient to damage ESD devices. (5) Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damge ESD devices. Samsung Electronics...
  • Page 6 (7) After replacing the Pick-up, open the short terminal on the PCB. * Be sure to put on a wrist strap grounded to the sheet. * Be sure to lay a conductive sheet made of copper etc. Which is grounded to the table. Samsung Electronics...
  • Page 7 FPC into Main PCB CN1 (See Fig 1-4). 3) Disassemble the deck. 4) Disassemble the deck PCB. 5) Replace the Pick-up. Note : If the assembly and disassembly are not done in correct sequence, the Pick-up may be damaged. Fig. 1-4 Samsung Electronics...

  • Page 8: Reference Information

    2. Reference Information 2-1 Semiconductor Base Diagram SS9012 K184 S9012 K184 G-634 Y 6A Fig. 2-1 Samsung Electronics...
  • Page 9 2) Small flat-blade tip-type soldering iron 3) Special desoldering tip iron 4) Airblower unit 5) Flat Package Pick-up 6) Flux can be cleaned by water 7) 0.3mm thin solder can be cleaned by water 8) Desoldering wire 9) Tweezers Samsung Electronics...
  • Page 10 The kind of the chip ICs are as follows: 1) SOP(Small Outline Package)IC 2) SSOP(Shrink Small Outline Package)IC 3) VSOP(Very Small Outline Package)IC 4) QFP(Quad Flat Package)IC 5) VQFP(Very Quad Flat Package)IC 6) PLCC(Plastic Leaded Chip Carrier)IC 7) TSOP(Thin Small Outline Package)IC Samsung Electronics...
  • Page 11 Precautions MEMO Samsung Electronics...
  • Page 12 6. IC Descriptions 6-1 DVD DATA PROCESSOR TC90A19F DIC1 BLOCK DIAGRAM Samsung Electronics...
  • Page 13 Extension data bus I/O External RAM address bus output Extension data bus I/O External RAM address bus output Extension data bus I/O External RAM address bus output Extension data bus I/O External RAM address bus output Extension data bus I/O Samsung Electronics...
  • Page 14 External RAM data bus I/O External RAM data bus I/O MPEG data output MPEG data output MPEG data output MPEG data output Digital ground Digital power supply MPEG data output MPEG data output MPEG data output MPEG data output Samsung Electronics...
  • Page 15 B IN PRE FIL Focus Error Detector C IN D IN TE OUT Vref V refIN V ref VREF & 2VR E IN V ref FIL Ripple Detector F IN 2V ref GEN. 2V ref FIL S/D sel TIME-CON. Samsung Electronics...
  • Page 16 2.1V reference voltage input Amplitude center voltage output of RF ripple RFZC signal Sub-beam E input RFRP RF ripple signal output Sub-beam F input Filter external capacitor for RFRP signal Single/double layer system selection input GNDRF RF system ground Samsung Electronics...
  • Page 17 Address TEST3 RFRP Circuit BUS0 RFZI micom BUS1 RFCT interface Compen- BUS2 AVDD sating Circuit CLV SERVO BUS3 Data 16k RAM slia SLCO AVSS Demod. BUCK VCOF VCOREF TEST4 PVREF Digital out Audio TSMOD LPFO status LPFN TMAX Samsung Electronics...
  • Page 18 Digital + power supply TMAXS TMAX detection result output Digital ground TMAX TMAX detection result output IO0(FMOP) Wide use I/O port Amplifier (for low pass filter) LPFN inverting input IO1(FMON) Wide use I/O port LPFO Amplifier (for low pass filter)output Samsung Electronics...
  • Page 19 D/A converting section ground D/A converting section reference voltage L channel data forward rotation output D/A converting section power supply TEST1 Test mode terminal TEST2 Test mode terminal TEST3 Test mode terminal BUS0 Data I/O (for microcomputer interface) Samsung Electronics...
  • Page 20 Interface Control Logic Interface M P E G Video Decoder Sync Generator Program D V D / C D Stream Interface Dolby Digital Decoder Audio Audio Decoder Digital Audio Interface IEC-958 Interface M P E G Audio Decoder Samsung Electronics...
  • Page 21 A _ V S S Signals C S T R O B E A _ V D D E R R O R V D D 5 M A X D A C K R E S E T 6-10 Samsung Electronics...
  • Page 22 P 3 2 ( H W R ) (TIMER 3) P33(WAIT) PORT 3 P34(BUSRQ) (INT4/T14)P80 P35(BUSAK) (INT5/T15)P81 16BIT TIMER P36(R/W) (T04)P82 (TIMER 4) P37(RAS) (T05)P83 16BIT TIMER (INT6/T16)P84 CS/WAIT P40(CS0/CAS0) (TIMER 5) (INT7/T17)P85 CONTROLLER P41(CS1/CAS1) (T06)P86 (3-BLOCK) P42(CX2/CAS2) (INTO)P87 Samsung Electronics 6-11...
  • Page 23 Clock Output(System Clock/2) Address/Data Bus9 Power Supply Pin(+5V) Address/Data Bus10 AD10 GND Pin(0V) Address/Data Bus11 AD11 20MHz Address/Data Bus12 AD12 20MHz Address/Data Bus13 AD13 TMP93CS41F:¡– L ¡– AD14 Address/Data Bus14 Reset Micom Rest Input RESET Address/Data Bus15 AD15 6-12 Samsung Electronics...
  • Page 24 DVD/CD Mode Control(DVD=”Low”) DVD_SEL Door Open Motor Control OPEN Door Close Motor Control CLOSE Single/Dual Disc Select(Single=”Low”) S/D_SEL Video Encoder Trans. Data(l Video Encoder Trans. Clock(l Bass Redirection Control(“L”=SW On, “H”=SW Off) BASS Sled Gain Select SLEDGS Samsung Electronics 6-13...
  • Page 25 6-6 DIGITAL VIDEO ENCODER SAA7128 VIC1 BLOCK DIAGRAM SYNC/ I'C- INTERFACE CLOCK Clock&Timing I'C-Control I'C-Control I'C-Control 9..16 CVBS (CSYNC) MP(7:0) OUTPUT- FADER ENCODER CbCr INTERFACE (CVBS) (CVBS) I'C-Control 22,32,33 VSSA I'C-Control R(Cr) RGB- CbCr PROCESSOR G(Y) B(Cb) 6-14 Samsung Electronics...
  • Page 26 Analog ground 3 for the DAC reference ladder and the oscillator S S A 3 Crystal oscillator output X T A L Crystal oscillator input; if the oscillator is not used, this pin should be connected to X T A L 1 ground. Samsung Electronics 6-15...
  • Page 27 The 12C-bus receiver waits for the START condition. S C L 12C serial clock input S D A 12C serial data input/output T T X R Q Teletext Request output, indicating when text bits are requested T T X Teletext bit stream input 6-16 Samsung Electronics...
  • Page 28 P W R Digital Power supply(+5V). Recommended connection is to the analog power supply. D G N D P W R Digital Ground. Recommended connection is to the digital ground plane. ¡ These pins include internal pull-up resistors. Samsung Electronics 6-17...
  • Page 29 P W R D G N D Digital Ground. G N D P G N D PLL Ground. G N D X T O Crystal oscillator output. Note:(1)Schmitt triger input with intermal pull-up resistors. (2) Schmitt triger input. 6-18 Samsung Electronics...
  • Page 30 V S S Ground Row Address Strobe R A S U C A S Upper Column Address Strobe L C A S Lower Column Address Strobe Read/Write Input Data Output Enable Power (+5V) Power (+3.3V) No Connection Samsung Electronics 6-19...
  • Page 31 Address Inputs DQ14 CE (E)/PGM (P) Chip Enable Input DQ13 DQ0-DQ15 Data External Connection DQ12 DQ11 No External Connection DQ10 No internal Connection OE (G) Output Enable Input Vcc Syply Voltage Program Voltage Input Ground OE (G) 6-20 Samsung Electronics...
  • Page 32 PIN ASSIGNMENT PGM (P) NAME FUNCTION A0-A17 Address Inputs CE (E) Chip Enable Input DQ0-DQ7 Data Input/Outputs OE (G) Output Enable Input PGM (P) Program Enable Input OE (G) Vcc Syply Voltage CE (E) Program Voltage Input Ground Samsung Electronics 6-21...
  • Page 33 FRONT MICOM <-- SEG9 FLT DISPLAY SEGMENT 9 MAIN MICOM RECEIVE REQUEST INT1 Not Use SEG10 FLT DISPLAY SEGMENT 10 INT2 Not Use FLT DISPLAY SEGMENT 11 SEG11 INT3 REMOCON RECEIVE INTTERUPT FLT DISPLAY SEGMENT 12 SEG12 6-22 Samsung Electronics...
  • Page 34 FRONT MICOM --> MAIN MICOM SEND REQUEST FRONT MICOM --> MAIN MICOM TRNS. DATA FRONT MICOM --> MAIN MICOM RECEIVE DATA CLOCK FRONT MICOM --> MAIN MICOM COMM. CLOCK Function Key (Scart Jack) MUTE2 Audio Mute 2 MUTE1 Audio Mute1 POWER +5V Samsung Electronics 6-23...
  • Page 35 For test AC channel HPF time constant Setting external ACDC capacitor BACTL Tracking error balance control input Phase difference signal off-set compensation DPCTL control input N.C. No Connection AIN1 Four division detector A input AVCC Power (+5V) input 6-24 Samsung Electronics...

  • Page 36: Product Specification

    G G e e n n e e r r a a l l Power Requirements AC 120V/60Hz 1 8 W Power Consumption 4.1Kg Weight DVD-907 1 K g 4.4Kg DVD-927 (WDH : mm) DVD-907 420 X 333 X 80...
  • Page 37 A A u u d d i i o o C C h h a a r r a a c c t t e e r r i i s s t t i i c c s s Frequency Response 48KHz Sampling 4Hz ~ 22KHz 96KHz Sampling 4Hz ~ 44KHz S/N Ratio 100dB Dynamic Range 9 6 d B THD(Total Harmonic Distortion) 0.005% Wow and Flutter Under the limited value of measuring Samsung Electronics...

  • Page 38: Operating Instructions

    DVD playback. SEARCH Buttons To search through tracks easily and rapidly. REPEAT Button To repeat the entire disc, or a SKIP Buttons desired title or track. To skip selections on discs. STOP Button PLAY/PAUSE Button fig 4-1 Samsung Electronics...
  • Page 39 VOLUME CONTROL Button these buttons when you want to move to desired position. ENTER Button SUBTITLE Button To play a selected title. To turn subtitles on or off. RETURN Button To return to a previous menu. fig 4-2 Samsung Electronics...
  • Page 40 If you have all speakers needed for AC-3, you should set the center, surround and subwoofer to *YES*. When you have configured the audio output as AC-3 and have set the CENTER of the surround sound to YES, you must have a center speaker connected to hear the dialogue. Samsung Electronics...
  • Page 41 ANALOG AUDIO OUT VIDEO OUT COMPONENT VIDEO OUT AUDIOOUT VIDEO IN AUDIO IN Fig.4-3 2) Connecting to an Audio system OPTICAL DIGITAL S-VIDEO DIGITAL AUDIOOUT ANALOG AUDIO OUT COMPONENT VIDEO OUT VIDEO OUT AUDIOOUT CD or AUX Fig. 4-4 Samsung Electronics...
  • Page 42 Operating Instructions 4-3-2 Connections 1) S-VIDEO Connection OPTICAL DIGITAL S-VIDEO DIGITAL AUDIOOUT ANALOG AUDIO OUT VIDEO OUT COMPONENT VIDEO OUT AUDIOOUT AUDIO IN S-VIDEO IN Using the S-Video connection plug. Fig. 4-5 Samsung Electronics...
  • Page 43 COMPONENT VIDEO OUT AUDIOOUT Amplifier with 5.1 channel analog Input center speaker front front speaker speaker (right) (left) TV or MONITOR with Y,Pr,Pb VIDEO in sub-woofer for supporting bass sound. rear rear speaker speaker (left) (right) Fig. 4-6 Samsung Electronics...
  • Page 44 COMPONENT VIDEO OUT AUDIOOUT Amplifier with 5.1 channel analog Input center speaker front front speaker speaker (right) (left) TV or MONITOR with Y,Pr,Pb VIDEO in sub-woofer for supporting bass sound. rear rear speaker speaker (left) (right) Fig. 4-7 Samsung Electronics...
  • Page 45 Operating Instructions 4) Stereo amplifier and S-Video connection. (2 channel) • Normal stereo amplifier connection, (2 channel) OPTICAL DIGITAL S-VIDEO DIGITAL AUDIOOUT ANALOG AUDIO OUT VIDEO OUT COMPONENT VIDEO OUT AUDIOOUT Stereo amplifier speaker speaker (left) (right) Fig. 4-8 Samsung Electronics...
  • Page 46 • The Optical Digital Audio Out and Digital Audio Out both output the same signal. OPTICAL DIGITAL S-VIDEO DIGITAL AUDIOOUT ANALOG AUDIO OUT VIDEO OUT COMPONENT VIDEO OUT AUDIOOUT Amplifier equipped with 'Dolby Pro-Logic'. center speaker left right speaker speaker surround speaker Fig. 4-9 Samsung Electronics...
  • Page 47 AUDIOOUT ANALOG AUDIO OUT COMPONENT VIDEO OUT VIDEO OUT AUDIOOUT Amplifier with 5.1 channel digital input. center speaker front front speaker speaker (left) (right) sub-woofer for supporting bass sound. rear rear speaker speaker (left) (right) Fig. 4-10 4-10 Samsung Electronics...

  • Page 48: Disassembly And Reassembly

    5. Disassembly and Reassembly 5-1 DVD-907 5-1-1 Exterior and PCB Disassembly 5-1-1(a) Door-tray 1) Supply power and open Tray 2) Disassemble the door-tray in direction of arrow. 3) Close Tray and power off. Note : If Tray doesn’t open, insert a clip into the hole (as shown in detailed drawing), and open Tray manually.
  • Page 49 5-1-2(b) Top cabinet 1. Remove 3 screws on the back panel. 2. Remove 4 screws on the left and right side. 3. Lift up the top cabinet in direction of arrow. CABINET-TOP 3 SCREWS 2 SCREWS 2 SCREWS Fig. 5-2 Samsung Electronics...
  • Page 50 3. Remove 2 screws from PCB-front. 4. Remove 2 hooks to fix PCB-front and disassemble PCB-front. 2 SCREWS 2 SCREWS 1 SCREW PANEL-FRONT ASS’Y COVER-FRONT ASS’Y 1 SCREW Fig. 5-3 Samsung Electronics...
  • Page 51 3. Remove 4 screws from PCB-SMPS. 4. Remove 2 Spacer-PCB inserted in PCB-SMPS and lift up PCB-SMPS. 5. Remove 2 screws to fix BRKT-PCB ass’y. 4 SCREWS PCB-MAIN 4 SCREWS HOLDER-PCB PCB-SMPS 2 SCREWS BRKT-PCB ASS’Y SPACRE-PCB ASS’Y BOTTOM Fig. 5-4 Samsung Electronics...
  • Page 52 Disassembly and Reassembly 5-1-5(e) Deck, Frame-chassis 1. Remove 4 screws from the deck and lift it up. 2. Remove 1 screws and 2hooks from the frame-chassis and lift it up. 4 SCREWS DECK 1 SCREW FRAME-CHASSIS 2 HOOKS Fig. 5-5 Samsung Electronics...
  • Page 53 Disassembly and Reassembly 5-1-2 PCB Locations PCB-MAIN PCB-FRONT PCB-SMPS Fig. 5-6 Samsung Electronics...
  • Page 54 Disassembly and Reassembly 5-1-3 Connector Diagram PCB-MAIN PCB-SMPS PCB-FRONT Fig. 5-7 Connector wafer No. Direction Connector wafer No. FJP1 PCB-MAIN DCN1 DCN1 PCB-FRONT FJP1 PCB-MAIN DECK PCN02 PCB-MAIN PCN1 PCN1 PCB-SMPS PCN02 Samsung Electronics...
  • Page 55 2) Disassemble the door-tray in direction of arrow. 3) Close Tray and power off. Note : If Tray doesn’t open, insert a clip into the hole (as shown in detailed drawing), and open Tray manually. TRAY DOOR-TRAY 70mm CHIP Fig. 5-8 Samsung Electronics...
  • Page 56 5-2-2(b) Top cabinet 1. Remove 3 screws on the back panel. 2. Remove 4 screws on the left and right side. 3. Lift up the top cabinet in direction of arrow. CABINET-TOP 3 SCREWS 2 SCREWS 2 SCREWS Fig. 5-9 Samsung Electronics...
  • Page 57 6. Remove 4 top hooks and 5 bottom hooks and disassemble the cover-panel ass’y. 4 HOOKS 1 SCREW 2 SCREWS 2 SCREWS PCB-FRONT PANEL-FRONT ASS'Y 1 SCREW 5 HOOKS 2 SCREWS COVER-PANEL ASS'Y Fig. 5-10 5-10 Samsung Electronics...
  • Page 58 PCB-SMPS. 4. Remove 3 Spacer-PCB inserted in PCB-SMPS and lift up PCB-SMPS. 5. Remove 2 screws to fix BRKT-PCB ass’y. 4 SCREWS PCB-MAIN BRKT-PCB ASS'Y 3 SCREWS HOLDER-PCB PCB-SMPS 2 SCREWS ASS'Y BOTTOM SPACER-PCB Fig. 5-11 Samsung Electronics 5-11...
  • Page 59 Disassembly and Reassembly 5-2-5(e) Deck, Frame-chassis 1. Remove 4 screws from the deck and lift it up. 2. Remove 4 screws from the frame-chassis and lift it up. 4 SCREWS DECK 4 SCREWS FRAME-CHASSIS Fig. 5-12 5-12 Samsung Electronics...
  • Page 60 Disassembly and Reassembly 5-2-2 PCB Locations PCB-MAIN PCB-SMPS Fig. 5-13 Samsung Electronics 5-13...
  • Page 61 Disassembly and Reassembly 5-2-3 Connector Connection PCB-MAIN PCB-SMPS PCB-FRONT Fig. 5-14 Connector wafer No. Direction Connector wafer No. FJP1 PCB-MAIN DCN1 DCN1 PCB-FRONT FJP1 PCB-MAIN DECK PCN02 PCB-MAIN PCN1 PCN1 PCB-SMPS PCN02 5-14 Samsung Electronics...
  • Page 62 “C”. 3. Pull the tray to disassemble, while simultaneously pushing the hook in direction of arrow “A”, “B”. 2 SCREWS ASS'Y-DECK CLAMPER HOOK "A" "C" " B " HOOK GEAR-CAM CENTER TRAY EMERGENCY HOLE CLIP Fig. 5-15 Samsung Electronics 5-15...
  • Page 63 1. Remove 2 screws and disassemble the ass’y-PCB deck 2. Disassemble the ass’y-deck DVD in direction of arrow “B”, while simultaneously pushing the hook direction of arrow “A”. ASS'Y-DECK DVD "B" "A" HOOK ASS'Y-PCB DECK 2 SCREWS Fig. 5-16 5-16 Samsung Electronics...
  • Page 64 14 14 GEAR-SYNCHRO 15 15 13 13 LEVER-OPEN S/W 1 SCREW 12 12 ASS'Y-MOTOR LOAD 1 1 1 1 MOTOR,PULLEY ASSEMBLING : ADJUST THE END OF MOTOR SHAFT SAMELY AS HEIGHT OF PULLEY AT ASSEMBLY. Fig. 5-17 Samsung Electronics 5-17...
  • Page 65 Disassembly and Reassembly 5-3-4 Ass’y deck 1. Remove 4 screws 2. Lift up the ass’y-deck 4 SCREWS ASS'Y-DECK Fig. 5-18 5-18 Samsung Electronics...
  • Page 66 HUMP MOTOR SHAFT MOTOR-FEED 1SCREW ASS’Y-PCB HALL SENSOR HOLDER-CAM 3SCREWS 2SCREWS ASS’Y-MOTOR ASS’Y-GEAR MAGNET SPINDEL ASS’Y-GEAR FRRD AU/AL 3SCREWS WASHER-PLANE SHAFT-P/U-L GEAR FRRD B WASHER-PLANE ASS’Y-PICK UPL ASS’Y-GEAR FRRD CU/CL SHAFT-P/U-R 3SCREWS WASHER-PLANE RACK-SLIDE Fig. 5-19 Samsung Electronics 5-19...
  • Page 67 Disassembly and Reassembly MEMO 5-20 Samsung Electronics...

  • Page 68: Circuit Descriptions

    Input : Common power to transformer(Vp) 20µs Fig. 7-2 The output Vs of transformer is determined by the ratio of 1st Np and 2st Ns. Vs = (Ns/Np) x Vp Fig. 7-3 Vout Vout is output (DC) by diode and condensor. Fig. 7-4 Samsung Electronics...
  • Page 69 (Vcc of PIC1 decreases below OFF voltage, using only the resistance due to load increase after PIC1 driving.) - 2nd : Circuit followings output winding of transformer. - f(Frequency) : Switching frequency(T : Switching cycle) - Duty : (Ton/T) x 100 Samsung Electronics Samsung Electronics...
  • Page 70 S S e e n n s s e e 7.5V F F E E T T Reset Thermal Proction O V P C C o o n n t t r r o o l l I I C C Fig. 7-10 Samsung Electronics Samsung Electronics...
  • Page 71 (output from RFGC terminal of TC9420F, via low-pass filter to constitute a loop for adjustment of constant amplitude). The gain in EQout is 1.0 for DVD and 1.67 for CD. EQout terminal is connected with EQin(pin 45) externally, and inputs into DVD EQ and CD EQ(Waveform equalizing circuit). Samsung Electronics Samsung Electronics...
  • Page 72 LC86P6232) of front and controls the devices on board to execute the corresponding commands after initializing the devices connected with micom on board at power on. Fig.7-13 Samsung Electronics Samsung Electronics...
  • Page 73 • CH3 : DPCS (DIC1-12 DVD PROCESSOR CHIP SELECT) • CH4 : DVDCS (BIC1-175, A/V DECODER CHIP SELECT) • CH5 : WR (MIC1-73, MICOM OUTPUT WRITE SIGNAL) • CH6 : RD (MIC1-72, MICOM OUTPUT READ SIGNAL) Fig. 7-15 7-10 Samsung Electronics Samsung Electronics 7-11...
  • Page 74 The basic operation repeats to perform (disc data read --> memory full --> move pick-up to previous track --> disc HADRS data read --> memory full --> move pick-up to previous track) as described above. DPINT DPCK SVCK HCEN RASN RASN CASN CASN HDWT MOEN MOEN HDRD MWEN MWEN HINT Fig. 7-18 7-12 Samsung Electronics Samsung Electronics 7-13...
  • Page 75 • CH2 : SLCO (DIC1-42, Slice level) • CH3 : ED7 (DIC1-34, Sliced data of RF signal) • CH3 : PDON (DIC1-36, Phase difference signal) • CH4 : PLCK (DIC1-26, PLL clock) Fig. 7-24 Fig. 7-21 7-14 Samsung Electronics Samsung Electronics 7-15...
  • Page 76 • CH1 : PVSREQ (DIC1-96, Data request signal from DVD1) • CH2 : PVSACK (DIC1-93, Output data acknowledge signal) • CH3 : BSTCLK (DIC1-94, Output clock) • CH4 : PVSIN (DIC1-81~84,87~90, Output data) Fig. 7-27 Fig. 7-30 7-16 Samsung Electronics Samsung Electronics 7-17...
  • Page 77 Refresh time(Period) of DIC2(4MDRAM) • CH3 : WR (DIC1-10, TC90A19F register write) • CH4 : RD (DIC1-11, TC90A19Fregister read) • CH5 : HADRS (DIC1-24,25, Micom address bus) • CH6 : HAD (DIC1-13~20, Micom data bus) Fig. 7-34 7-18 Samsung Electronics Samsung Electronics 7-19...
  • Page 78 Trap Main MACROVISION Cloed captions micom 7.0.1/6.1 CGMS TMP93CS41F VSYNC MIC1 Cr/R HSYNC Video Chrominance timming processor Cb/B Fig. 7-38 Video output block diagram MRST CTRL+CFG register Fig. 7-39 VIC1 (SAA7128) Internal block diagram 7-20 Samsung Electronics Samsung Electronics 7-21...
  • Page 79 VC11 is an AC coupling capacitor, VR19 is an essential impediance at video signal interface and being matched with the impediance in the input block of exterior devices determines the level of video signal. 7-22 Samsung Electronics Samsung Electronics 7-23...
  • Page 80 SIC4. Pins 46, 49 of SIC7 are controlled by VREF(approx. 2.1V) during normal play. Meanwhile, DVD repeats the track jump from 1 to 4 in inner direction at normal play ( because data- read speed from disc is faster than data output speed on screen). Fig. 7-42 7-24 Samsung Electronics Samsung Electronics 7-25...
  • Page 81 Input RF signal (from Pick-up) to SIC7 pin 36, Detect SYNC signal from RF in SIC7, and output PWM signal to AIC3 CENTER FILTER SIC7 pin 55 for constant linear velocity. PCM1723 -10.5dB POST D/A CONVERTER FILTER WOOFER -5.0dB -4.5dB x 3 WOOFER Fig. 7-44 Audio output Diagram 7-26 Samsung Electronics Samsung Electronics 7-27...
  • Page 82 If the user do not have sub woofer speaker and the disc is recorded by 5.1 channel, center, rear, sub woofer bass signal can be downmixed in 2 channel front L/R. If there is a sub woofer speaker, it is outputted directly to subwoofer without down mixing. 7-28 Samsung Electronics Samsung Electronics 7-29...
  • Page 83 Circuit Descriptions MEMO 7-30 Samsung Electronics...

  • Page 84: Troubleshooting

    Replace uCOM program SIC2 3, 21 terminal? (MIC2) Actual velocity occurs at SIC2 18 terminal? Replace Hall PCB Check SIC2 peripheral circuit SLEDGS terminal is ÔLÕ (During search term)? Check SLEDGS terminal of uCOM. Check peripheral circuit. Samsung Electronics...
  • Page 85 Check SIC2 peripheral soldering FINE SEEK check FINE SEEK RFRF signal is missing? Check RIC1 peripheral circuit RFCT follows center level of RFRF? Check PR11 peripheral circuit Track incoming is delayed? Time Out due to many jump counts Samsung Electronics...
  • Page 86 Check SIC7 53 peripheral circuit SIC4 14 ouput is normal? SLEDGS terminal is ÔLÕ? Check SQ1 peripheral circuit and SLEDGS terminal SIC4 17, 18 terminal outputs are normal? Check SIC4 soldering and power Pick-up transfer is smooth. Samsung Electronics...
  • Page 87 IC. Check path to SIC7 and DIC1 SIC6 Pin 1 output is normal? Check SIC6 soldering and power SIC5 Pin22 signal is normal? Check SIC5 soldering and power or Replace SIC5 Check or replace disc motor Samsung Electronics...
  • Page 88 MIC1 Pin84, 85 is OPEN:L.L? CLOSE:H.H Micom error Check SIC4 Pin26, 27 ouput at open/close Signal is reverse output (based on SR24,25)? Check SR24, 25 peripheral circuit Check signal line state from SIC4 Pin26, 27 to tray motor Samsung Electronics...
  • Page 89 Troubleshooting No disc recognition LD is outputted from object lens at play key input? No disc focus incoming no disc occurs Samsung Electronics...
  • Page 90 Troubleshooting No focus incoming FES in SIC7 Check RR26, RR26A, RR28 43(TP39) is within value and A, B, C, D input specified range? SIC4 1,2 Check SIC4 outputs are normal? Check open state from SIC4 to Pick-up Samsung Electronics...
  • Page 91 Troubleshooting No PICK-UP Home positioning MIC1 8 Output is normal? Micom error SELED FG(MIC1 9) is input normally Check SIC2, SIC9 signal transfer system Check SIC4 soldering and power Samsung Electronics...
  • Page 92 RIC1 50 output is 180mV? RIC1 50 output is 0V? Divide RQ1 emitter terminal voltage and 5V real voltage difference into 12½ LD MPD error. Replace Pick-up Current exceeds 0.1A? Open check in related circuit LD out Pick-up replace Samsung Electronics...
  • Page 93 Check signal connection Control signal input is between MIC1 normal at PIN41,42 in VIC1? SYNC output is normal Check every pin connection of VIC1 at PIN7,8 in VIC1? Input data is normal at Check BIC1 connection PIN9-16 in VIC1? 8-10 Samsung Electronics...
  • Page 94 2V appears at collector in VQ3? Video signal of about Check every device 2V appears at collector connection in buffer unit in VQ6? Video Signal of about Check VC11,VR19,VL11 1V appears at output connection pin in VJ1? Check connection cable Samsung Electronics 8-11...
  • Page 95 Check VIC3(pin2) 18.432MHz AIC1 is normal? Check AIC4,6 peripheral circui AIC4,6 (pin1) output is normal? Check AIC5,7 peripheral circuit AIC5,7(pin1) input is normal? Base terminal level of Check DCN1(pin14) mute AQ5,6,9,10 are "L"? Check AL9,10,11,12 peripheral soldering and short 8-12 Samsung Electronics...
  • Page 96 AIC8,10(pin1) output is normal? peripheral circuit Check AIC8,10 AIC8,10(pin7) pin output is normal? peripheral circuit Check AIC11peripheral circuit AIC11(pin1,7) output is normal? Base terminal level of Check DCN1(pin19) mute AQ55,57,75,77are "L"? Check AL13,14 peripheral soldering and short Samsung Electronics 8-13...
  • Page 97 Check AIC3(pin2) 18.432MHz normal? AIC12(pin1,7) output is normal? Check AIC12 peripheral circuit AIC13(pin1) output is normal? Check AIC13 peripheral circuit Check DCN1(pin26) Base ferminal level of AQ21,22 are ÒLÓ? peripheral circuit Check AL15 peripheral soldering and short 8-14 Samsung Electronics...
  • Page 98 Check AIC14 peripheral circuit AIC14(pin1) output is normal? AIC13 (pin6) input is normal? Check AIC13 peripheral circuit AIC13 (pin7) output is normal? Base terminal level of AQ25, 26 are Check DCN1(pin26) mute "L"? Check AL16 peripheral soldering and short Samsung Electronics 8-15...
  • Page 99 Troubleshooting Check AIC8, 10, 12, 16 AIC17 (pin14,15) input is normal? peripheral circuit AIC17 (pin10,11) level are "L"? Check MIC1 (pin89) output 'L' AIC17 (pin2) output is normal? Replace AIC17(14053) Check AIC17 peripheral soldering and short 8-16 Samsung Electronics...
  • Page 100 Troubleshooting DIGITAL output error Output in BIC1 (PIN129) Check BIC1 peripheral circuit is normal? Output in BIC11 Check BIC11 IC (PIN4) is normal? Check AJ3,4 peripherial solder- ing and SHORT. Samsung Electronics 8-17...
  • Page 101 PF01 Error? PD01 Check PR10 voltage is missing? PIC1 Drain(Pin2) Check 2d voltage voltage is missing? Voltage exists in PIC1(Pin3)? Check PR11, 12, 13, 14 Replace PIC1 Pulse is missing in PIC1 5? Check feed back. Replace PIC1 8-18 Samsung Electronics...
  • Page 102 Check S/W interface. Check Keys of STOP, PLAY, OPEN communication status with main Micom work normally? (Check FIC1 pins 27,72,73,74,75) If the problem persists: Check after replacing Front PCB, with another one.Check other parts for abnormal Front operation persists. Samsung Electronics 8-19...
  • Page 103 /WR(MIC3-29 pi n ),/RD(MIC2-24 pi n ) si g nal s swi n g? CH1 (ALE) CH2 (HAD0~7) CH3 (HA0~7) Signals are output Replace DIC1 from DIC1-36, 37, 38 pin? ZIVA D6-L peripheral solder- ing and short check 8-20 Samsung Electronics...
  • Page 104 CH1 (ALE) CH2 (HAD0~7) CH3 (HAD0~7) Check short pin out of micom common- bus(8 bit)Check short or opening of micom Check soldering of micom and CS2,/RD,/WR signals occur? communication devices Check ZIVA D6-L peripheral unit Play Works? Samsung Electronics 8-21...
  • Page 105 Chekl DVD signal process block MIC6-9, 10 pin is fixed to 0V? MIC1 pin4 Check MIC1 peripheral soldering waveform state(0,1) (Including 12MHz oscillationg changes whenever pressing of front micom) front key? Check with Article ÒNo Frout (SET) OperationÓ 8-22 Samsung Electronics...

  • Page 106: Exploded Views And Parts List

    9. Exploded Views and Parts List 9-1 Exploded View DVD-907 9-2 Exploded View DVD-927 9-3 Deck Exploded View 9-4 Remote Control Samsung Electronics...
  • Page 107 S.N.A (PCB-MAIN) S.N.A (CABINET-TOP) S.N.A (MECHA) 24 PCB-FRONT 18 (PCB-SMPS) S.N.A (CHASSIS REAR)
  • Page 108 BRACKET-PCB;-,SECC,-,T1.0,NTR,-,DVD-860K AH61-10721B FRAME-CHASSIS;-,ABS94,HB,-,L180,W240,H70 AH95-10329B ASSY-CABINET BOTTOM;DVD-907,ASSY,EXPORT AH95-50252A ASSY-FOOT;DVD-860,ABS+EVA SPONGE,- AH90-10746U ASSY-PCB POWER;DVD-907,XXA AH39-10060M POWER-CORD;KKP-10W,SPT-2,AWG2/18,1.83MT, 6003-000276 SCREW-TAPTITE;BH,+,B,M3,L10,ZPC(YEL),SWC 6003-000275 SCREW-TAPTITE;BH,+,B,M3,L10,BLK,SWCH101 6003-000277 SCREW-TAPTITE;BH,+,B,M3,L12,ZPC(YEL),SWR 6003-000256 SCREW-TAPTITE;BHW,+,B,M3,L10,ZPC(YEL),SM AH90-10746V ASSY- PCB FRONT;DVD-907,XXA AH65-20001A CABLE-CLAMP;-,PE,-,BLK,-,DV532KV AH63-40163A GROUND-REAR;-,PBS,TO.2,-,DVD-860 AH63-30228A COVER-REAR;-,ABS94,HB,T2,BLK,-,-,DVD-860 AH64-60055D INLAY-REAR;-,PVC SHEET,T0.5,L186.8 W36.2, AH61-10692A BRACKET-PCB;-,SECC,-,T1.0,NTR,-,DVD-860K Samsung Electronics...
  • Page 109 9-2 Exploded View(DVD-927) Samsung Electronics...
  • Page 110 BRACKET-PCB;-,SECC,-,T1.0,NTR,-,DVD-860K AH61-10694A FRAME-CHASSIS;-,ABS94,HB,T3,L200,W180,H100,B AH95-10322A ASSY-CABINET BOTTOM;DVD-860K,SECC+ABS,- AH95-50252A ASSY-FOOT;DVD-860,ABS+EVA SPONGE,- AH63-30228A COVER-REAR;-,ABS94,HB,T2,BLK,-,-,DVD-860 AH90-10682A ASSY-PCB SMPS;DVD860,DOM AH39-10002G POWER CORD;CP,VCTFK-0.75X2,1.8M,5239,KS 3809-001030 CABLE-FLAT;30V,80C,110MM,8P,1MM,UL2 3809-001025 CABLE-FLAT;30V,80C,270MM,28P,1.25MM,UL289 6003-000276 SCREW-TAPTITE;BH,+,B,M3,L10,ZPC(YEL),SWCH1018AK 6003-000275 SCREW-TAPTITE;BH,+,B,M3,L10,BLK ,SWCH1018AK AH63-40163A GROUND-REAR;-,PBS,T0.2,-DVD-860 AH63-40161A GROUND-FRONT;-,PBS,T0.2,-,DVD-860 AH64-60055A INLAY-REAR;-,PVC SHHET,T0.3,L186.8 W36.2, AH90-10727U ASSY- PCB FRONT;DVD858V,CHN Samsung Electronics...
  • Page 111 9-3 Deck Exploded View Samsung Electronics...
  • Page 112 ASSY-PCB HALL SENSOR;SDR-130,DOM AH31-10028A MOTOR-FEED;DP,RF-300C-11440,D/V5.9,60HZ AH91-60125A ASSY-BRKT DECK;DP-1,DVD860,- AH61-50279A SHAFT-SYNCRO;DP,SUM24L+ZN,OD2,L119,ZPC,YEL, AH66-22005A GEAR-SYNCRO-A;DP,KEPITAL F20-03,M0.5,Z16,BLK AH66-10023A PULLEY-MOTOR;DP,KEPITAL F20-03,BLK, AH60-10151A SCREW-TAP TITE;DP,SPEC6.8 ,PH,+,CP,M2,L5,ZPC AC60-10051A SCREW-TAPPING;BH,-,-,M3,L8,FZY AH60-10143U SCREW-TAP TITE;DP,PH,+,SPEC,TAP1.7,L5,ZPC AH60-10145A SCREW-TAP TITE;DP,PH,+,SPEC OD5.5 FP,TAP1.7,L AH60-10147A SCREW-MACHINE;DP,CH,+,FP,M2,L4,ZPC,SWRCH10A, AH60-10143Q SCREW-MACHINE;DP,CH,+,FP,M1.7,L4,ZPC,SWRCH10 6001-000012 SCREW-MACHINE;CH,+,M1.7,L2.0,NYLOCK(WHT),SW AC60-10042A SCREW-TAPPING;PWH,+,-,M3,L8,- 6001-000002 SCREW-MACHINE;CH,+,M1.7,L3 Samsung Electronics...

  • Page 113: Remote Control

    9-4 Remote Control AH59-10087D REMOCON-ASSY;-,-,-,48,DVD905,S.S AH64-50327A DOOR-BATTERY;-,ABS94,HB,T2,L71 W60 H18,D/GR Samsung Electronics...

  • Page 114: Packing Diagram

    10. Packing Diagram Samsung Electronics 10-1...
  • Page 115 Packing Diagram MEMO 10-2 Samsung Electronics...

  • Page 116: Block Diagram

    4M EPROM 4M DRAM (PCM1720 Rev.1) (AK4324 Rev.2) Audio DAC (PCM1720) Processor Decoder (TC90A19F) (Ziva-2) Audio DAC (PCM1723) SERVO & CD COPY Processor PROTECTOR (TC9420F) Video 4M DRAM X 5EA Encoder (SAA7128) Yout Cout CVBS1 CVBS2 Option SCART-JACK Samsung Electronics 12-1...

  • Page 117: Pcb Diagrams

    13. PCB Diagrams 13-1 MAIN Rev.1 13-1-1 COMPONENT SIDE 13-1-2 SOLDER SIDE 13-2 FRONT (DVD-907) 13-3 FRONT (DVD-927) 13-4 SMPS 13-5 DECK 13-6 MAIN Rev.2 13-6-1 COMPONENT SIDE 13-6-2 SOLDER SIDE 13-7 SCART JACK Samsung Electronics 13-1...
  • Page 118 13-1 MAIN 13-1-1 COMPONENT SIDE PLAY B/D SILK (COMP) 13-2 Samsung Electronics...
  • Page 119 PCB Diagrams 13-1-2 SOLDER SIDE PLAY B/D SILK (SOLD) Samsung Electronics 13-3...
  • Page 120 13-2 FRONT (DVD-907) 13-4 Samsung Electronics...
  • Page 121 13-3 FRONT (DVD-927) Samsung Electronics 13-5...
  • Page 122 13-4 SMPS 13-6 Samsung Electronics...
  • Page 123 13-5 DECK Samsung Electronics 13-7...
  • Page 124 13-7 SCART JACK 13-10 Samsung Electronics...

  • Page 125: Wiring Diagram

    14. Wiring Diagram Samsung Electronics 14-1...

  • Page 126: Schematic Diagrams

    15-1 MAIN Rev.1 15-1-1 MICOM 15-1-2 SERVO 15-1-3 DATA PROCESSOR 15-1-4 A/V DECODER 15-1-5 AUDIO 15-1-6 VIDEO 15-1-7 CONNECTOR 15-2 Front 15-2-1 DVD-907 15-2-2 DVD-927 15-3 SMPS 15-4 PICK-UP/DECK 15-5 MAIN Rev.2 15-5-1 MICOM 15-5-2 SERVO 15-5-3 DATA PROCESSOR 15-5-4 A/V DECODER...
  • Page 127 15-1 MAIN Rev.1 15-1-1 MICOM 15-2 Samsung Electronics...
  • Page 128 Schematic Diagrams 15-1-2 SERVO Samsung Electronics 15-3...
  • Page 129 Schematic Diagrams 15-1-3 DATA PROCESSOR 15-4 Samsung Electronics...
  • Page 130 Schematic Diagrams 15-1-4 A/V DECODER Samsung Electronics 15-5...
  • Page 131 Schematic Diagrams 15-1-5 AUDIO 15-6 Samsung Electronics...
  • Page 132 Schematic Diagrams 15-1-6 VIDEO Samsung Electronics 15-7...
  • Page 133 Schematic Diagrams 15-1-7 CONNECTOR 15-8 Samsung Electronics...
  • Page 134 15-2 FRONT 15-2-1 DVD-907 Samsung Electronics 15-9...
  • Page 135 Schematic Diagrams 15-2-2 DVD-927 15-10 Samsung Electronics...
  • Page 136 15-3 SMPS Samsung Electronics 15-11...
  • Page 137 15-4 PICK-UP/DECK 15-12 Samsung Electronics...
  • Page 138 15-5 MAIN Rev.2 15-5-1 MICOM Samsung Electronics 15-13...
  • Page 139 Schematic Diagrams 15-5-2 SERVO 15-14 Samsung Electronics...
  • Page 140 Schematic Diagrams 15-5-3 DATA PROCESSOR Samsung Electronics 15-15...
  • Page 141 Schematic Diagrams 15-5-4 A/V DECODER 15-16 Samsung Electronics...
  • Page 142 Schematic Diagrams 15-5-5 AUDIO Samsung Electronics 15-17...
  • Page 143 Schematic Diagrams 15-5-6 VIDEO 15-18 Samsung Electronics...
  • Page 144 Schematic Diagrams 15-5-7 CONNCTOR Samsung Electronics 15-19...
  • Page 145 15-6 SCART JACK 15-20 Samsung Electronics...
  • Page 146 ELECTRONICS © Samsung Electronics Co., Ltd. May. 1998 Printed in Korea AH68-20198A...

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Dvd-927

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