Zenith DVB312 - Progressive-Scan Slim Design DVD... Manual Download Page 36

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5. VIDEO & AUDIO Block Diagram

IC604

VIDEO 6dB

IC601

AUDIO DAC

(2CH)

IC301

AUDIO DAC

(5.1CH)

IC602

(OP Amp)

LPF&Buffer

IC302

(OP Amp)

LPF&Buffer

IC303

(OP Amp)

LPF&Buffer

IC304

(OP Amp)

LPF&Buffer

CVBS

COMPONENT (R.G.B) / (Y.Pb.Pr

)

SUPER VIDEO (Y/C)

(R.G.B) / (Y.Pb.Pr )

(Y/C)

DAC RESET

ACLK

SCL

DAC RESET

ACLK

SCL

ADATA1

ADATA2

ADATA3

JAC

MPMP

EGEG

5.1CH BOARD

FRONT

‘R

’

REAR

‘R

’

FRONT

‘L

’

REAR

‘L

’

CENTER

WOOFER

AUDIO

‘R

’

AUDIO

‘R

’

ADATA3

DV7800M'S

Summary of Contents for DVB312 - Progressive-Scan Slim Design DVD...

Page 1: ...MARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECI...

Page 2: ...YS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC OPERA TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC TURE TUBE OR HIGH VOLTAGE...

Page 3: ...pan els Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called...

Page 4: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS 1 EXPLODED VIEWS 2 2 1 Cabinet and Main Frame Section 2 2 2 Deck Mechanism Section 2 4 3 Packing Accessory Section 2 5...

Page 5: ...and Main Frame Section 463 463 250 A00 463 463 300 283 279 280 A42 A49 A47 A48 A44 A43 A46 260 261 261 463 320 463 467 463 465 452 A41 SCART 5 1CH MODEL ONLY OPTIONAL PART KARAOKE MODEL ONLY KARAOKE...

Page 6: ...ion 001 003 004 431 026 021 023 025 436 436 436 022 024A 024B 024A 435 022A 032 024 027 028 031 030 434 A02 A03 A01 A00 020 011A 010 015 015A 015B 015C 017 013 014 018 011 029 012 430 431 431 012 430...

Page 7: ...ion BATTERY 808 PACKING SHEET 804 PACKING OPTIONAL PARTS 803 806 820 OWNER S MANUAL RF CABLE 810 CABLE SET ASS Y 801 REMOCON 900 BOX CARTON 802 PACKING 803 811 812 PLUG ASS Y 1WAY YELLOW PLUG ASS Y 1W...

Page 8: ...ELATED SIGNAL System checking 3 20 11 RF WAVEFORM 3 21 12 MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF 3 21 13 MT1379 VIDEO OUTPUT WAVEFORM 3 22 14 AUDIO OUTPUT FROM AUDIO DAC 3 23 BLOCK DIAGRAMS 3...

Page 9: ...resent at emitter of Q107 Replace Q107 Is there a DC voltage At terminal of BD101 Is there a DC voltage at R101 Replace IC101 Check F101 1 Power check flow No VF Is 5 2VA section working Replace D109...

Page 10: ...cieve OPEN CLOSE Key Receive CLOSE Key 1 Stop Playback Open Tray 2 Display tray open message LOGO 1 Execute Pressed Key IR Key 2 Systemoperati on Routi ne Loop 1 Judge whether have disc and disc type...

Page 11: ...Check FLASH R Wenable signal PRD RWR 4 Check RS232 SIGNALS 5 Check FLASH Memory related circui t Check the AC Vol tage Power PCBA 110V or 220V Switch on the Power PCBA Is the DC Vol tage outputs OK 5...

Page 12: ...k the Tray control IO pins on MT1376 MT1379 Check the Tray control amplifying circuit on Motor driver IC202 Does Tray move inside when it is not at closed position Normal TROUT TRIN signals Normal TRC...

Page 13: ...Lens has movements for searching Focus Proper F F outputs Check cable connect on with pick up head Proper FOSO outputs to motor driver Check FOSO connection on MT1379 and motor dirver Check the amp c...

Page 14: ...ircuit on MT1336 RFL signal Collector voltage of power transistor is OK Q204 Q205 Check cable connection between transistor couput and pick up head Laser off Proper RFL signal on MT1336 Proper DMSO si...

Page 15: ...signal on MT1336 Proper FEO signal on MT1336 Check the related circuit on MT1336 FEO sugnal Check the related circuit on MT1336 Properly TRSO signal on MT1379 T T output properly Check the TRSO conne...

Page 16: ...Audio filter amplify mute circuit IC602 Application circuit Check the cable connection on Front pannel Check connection between MT1379 Audio DAC Check VRST ACLK ABCK ASDAT3 Check the related circuit...

Page 17: ...801 Pin 2 Is the Mic signal at the IC801 Pins3 7 normal Is the Digital signal output at the IC5K1 Pin1 Replace IC501 Replace the IC5K1 Check pattern Replace the VR801 Replace IC801 Replace the mic jac...

Page 18: ...T AND DEBUGGING 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 MT1379 main clock is at 27MHz X501 3 8V 27MHz FIG 1 1 2 MT1379 MT1336 reset is high active PWR_CTL CN505 PIN 7 5 2VA Power Cord in M_RESET...

Page 19: ...3 12 3 RS232 waveform during procedure Downloading TXD J6 PIN3 RXD J6 PIN 2 FIG 1 3 4 Flash R W enable signal during download Downloading FRD IC5A1 PIN 28 FWR IC5A1 PIN 11 FIG 1 4...

Page 20: ...1379 main clock is at 27MHz X501 IC502 IC503 PIN 35 DCLK 93MHz Vp p 2 2 Vmax 2 7V FIG 2 1 3 TRAY OPEN CLOSE SIGNAL 1 Tray open close waveform OPEN CN203 PIN 3 CLOSE CN203 PIN 2 TROPEN IC202 PIN 1 TRCL...

Page 21: ...Tray close waveform OPEN CN203 PIN 3 CLOSE CN203 PIN 2 TROPEN IC202 PIN 1 TRCLOSE IC202 PIN 2 FIG 3 2 3 Tray open waveform OPEN CN203 PIN 3 CLOSE CN203 PIN 2 TROPEN IC202 PIN 1 TRCLOSE IC202 PIN 2 FI...

Page 22: ...1 4V 1 0V IC501 PIN 19 STBY 5V IC201 PIN 50 SL 4 7V 3 6V 1 9V IC202 PIN 12 SL 5 3V 3 7V 2 5V IC202 PIN 13 FIG 4 1 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION FOSO 1 5V 1 4V 1 3V IC501 PIN 12 F 4...

Page 23: ...TROL RELATED SIGNAL NO DISC CONDITION MDI1 0V 180mV IC201 PIN 124 LD01 5 0V 3 5V IC201 PIN 125 LD02 5 0V 3 6V IC201 PIN 126 FIG 6 1 7 DISC TYPE JUDGEMENT WAVEFORM F IC202 PIN 9 FE IC201 PIN 18 RFL IC2...

Page 24: ...3 17 F IC202 PIN 9 FE IC201 PIN 18 RFL IC201 PIN 19 FIG 7 2 DVD F IC202 PIN 9 FE IC201 PIN 18 RFL IC201 PIN 19 FIG 7 3 CD...

Page 25: ...3 18 F IC202 PIN 9 FE IC201 PIN 18 RFL IC201 PIN 19 FIG 7 4 CD 8 FOCUS ON WAVEFORM FE IC201 PIN 18 FOSO IC501 PIN12 F IC202 PIN 9 F IC202 PIN 8 FIG 8 1 DVD...

Page 26: ...FE IC201 PIN 18 FOSO IC501 PIN12 F IC202 PIN 9 F IC202 PIN 8 FIG 8 2 CD 9 SPINDLE CONTROL WAVEFORM NO DISC CONDITION DMSO 1 4V 1 8V IC501 PIN 18 SP 3 6V 2 4V IC202 PIN 10 SP 3 6V 4 8V IC202 PIN 11 FIG...

Page 27: ...20 10 TRACKING CONTROL RELATED SIGNAL System checking TE IC201 PIN 21 TRSO IC501 PIN 13 T IC202 PIN 7 T IC202 PIN 6 FIG 10 1 DVD TE IC201 PIN 21 TRSO IC501 PIN 13 T IC202 PIN 7 T IC202 PIN 6 FIG 10 2...

Page 28: ...3 21 11 RF WAVEFORM RFOP 2 3V 1 1V IC201 PIN 6 RFON 0 8V 2 0V IC201 PIN 7 FIG 11 1 12 MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF IC501 PIN 153 FIG 12 1...

Page 29: ...3 22 13 MT1379 VIDEO OUTPUT WAVEFORM 1 Full colorbar signal CVBS IC604 PIN 23 DCLK 93MHz Vp p 2 2 Vmax 2 7V FIG 13 1 2 Y IC604 PIN 21 FIG 13 2...

Page 30: ...3 23 3 C IC604 PIN 26 DCLK 93MHz Vp p 2 2 Vmax 2 7V FIG 13 3 14 AUDIO OUTPUT FROM AUDIO DAC 1 Audio L R FIG 14 1 JK601 PIN 4 5...

Page 31: ...3 24 2 Audio related Signal ASDAT3 IC501 PIN 157 ABCK IC501 PIN 148 ALRCK IC501 PIN 149 ASDATA3 FIG 14 2...

Page 32: ...01 MT1336E RF SLED FEEDING MOTOR SL SL IC202 LA6560 MOTOR DRIVER M V33 DV33 AV33 DV33 V25 VCC DV33 3V3M IC5K1 CS5331A ADC IC5K2 KA741 OP AMP VCC AMDAT MIC_IN ACLK ABCLK ALRCK IC604 MM1623XFBE VIDEO BU...

Page 33: ...A 29VA VF RECTIFIER LINE FILTER SWITCHING IC TRANS FEED B REG 8V 8V 5 2VA VF RECTIFIER FLD RECTIFIER 9V RECTIFIER 5 2V LPF LPF RECTIFIER 14V LPF 12V AC90 240V PWR ON OFF REG 3 3V 3 3V 3 3V_M REG 12V O...

Page 34: ...IN F F T T SL SL LOAD LOAD 27MHz X TAL RFOP RFON LD0 1 LDO 2 IOA MDI 1 ALPC V20 SDEN SDATA SCLK PWMOUT2 LIMIT TRIN TROUT TRCLOSE STBY V1P4 IC302 GM72V161621 1M x 16bit SDRAM IC303 GM72V161621 1M x 16b...

Page 35: ...RONT BOARD IC502 SDRAM 16M RFOP RFON HTRC RFRP RFL DCLK WE CAS RAS CS DCKE MA 0 10 DQM0 DQM1 DQ 0 15 DQM2 DQM3 DQ 16 31 X501 27MHz AMDAT ACLK ABCK ALRCK KARAOKE BOARD SCL SDA Y2 Y Y3 Color Y4 Y Y5 Cb...

Page 36: ...C302 OP Amp LPF Buffer IC303 OP Amp LPF Buffer IC304 OP Amp LPF Buffer CVBS COMPONENT R G B Y Pb Pr SUPER VIDEO Y C R G B Y Pb Pr Y C DAC RESET ACLK SCL SDA DAC RESET ACLK SCL SDA ADATA1 ADATA2 ADATA3...

Page 37: ...one is connected at this time MICON recoguizes the connection and prepares the compo sition of external voice and internal melody 3 The week signal of the microphone is converted to the digital signal...

Page 38: ...HE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED NOTE 1 Shaded parts are critical for safety Replace only with specified par...

Page 39: ...olor Digitron all not display System not working System not working or screen is abnormal System not working or Digitron not display Program download fail System not operate 02 12 26 R14600A AUDIO DAC...

Page 40: ...3 35 3 36 3 RF SERVO CIRCUIT DIAGRAM CD DVD LD will not on 02 12 26 R14601A...

Page 41: ...CUIT DIAGRAM OPTIONAL PART OPTIONAL PART OPTIONAL PART Karaoke not operate Digital abnormal 5 1CH Audio Bad System not operate or Digitron abnormal or Key not operate Power LED abnormal System not ope...

Page 42: ...CIRCUIT DIAGRAM Video Signal Y Video Signal Color Video Signal CVBS 2CH Audio 2CH Audio out bad All Video signal isn t appear or bad SACD OPTION 2CH Audio out bad 2 5V doesn t appeat System not worki...

Page 43: ...P PLAY STOP PLAY STOP PLAY 0 08 0 16 2 0 3 28 3 29 5 52 5 49 5 09 5 08 1 82 0 45 1 64 1 63 3 28 3 28 5 52 5 48 2 43 2 42 2 84 0 1 64 1 64 0 1 65 5 51 5 47 5 09 5 08 2 83 3 12 1 58 1 56 1 63 1 64 0 0 1...

Page 44: ...3 204 0 1 43 205 0 1 42 206 0 2 1 207 0 2 07 208 0 1 41 209 0 1 52 210 0 1 43 211 0 2 81 212 0 3 28 213 0 0 12 214 0 0 12 215 1 02 1 43 216 0 1 43 STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY IC2...

Page 45: ...3 45 3 46 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...

Page 46: ...47 3 48 2 KEY P C BOARD Solder Side 7 TOOL Solder Side 8 TOOL Solder Side 9 TOOL 3 TIMER P C BOARD LOCATION GUIDE 7 TOOL Solder Side LOCATION GUIDE 8 TOOL Solder Side LOCATION GUIDE 9 TOOL Solder Sid...

Page 47: ...3 49 3 50 6 KARAOKE P C BOARD KARAOKE MODEL ONLY LOCATION GUIDE Solder Side 5 POWER P C BOARD LOACTION GUIDE Solder Side 4 SCART 5 1CH P C BOARD OPTIONAL PART LOCATION GUIDE Solder Side...

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