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Philips DVP 721VR Service Manual Download Page 54

3-62

Normal IR.VFD & Front
pannel key functions?

Communications between

IR.VFD Front pannel key & MT1389

is normally?

Check communication lines on

MT1389.

NO

YES

Check the cable connection on

Front pannel.

TEST END

YES

Normal Audio output
when disc playback?

Audio DAC received

correct data stream?

Check connection between MT1379

 &Audio DAC.

Normal Audio DAC

out?

Check the related

circuit of Audio DAC.

Check Audio filter,amplify,mute

circuit.

NO

NO

NO

YES

YES

YES

E

NO

Summary of Contents for DVP 721VR

Page 1: ...D PART 5 1 DVD VCR Service Manual SECTION 1 SUMMARY 1 1 PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 2 SERVICING PRECAUTIONS 1 3 SERVICE INFORMATION FOR EEPROM IC SETTING 1 4 SPECIFICATIONS 1 5 SECTION 2 CABINET MAIN CHASSIS 2 1 EXPLODED VIEWS 2 2 1 CABINET AND MAIN FRAME SECTION 2 2 2 PACKING ACCESSORY SECTION 2 3 SECTION 3 ELECTRICAL 3 1 OVERALL BLOCK DIAGRAM 3 2 VCR PART ELECTRICAL ...

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 MECHANISM OF VCR PART SECTION 5 MECHANISM OF DVD PART SECTION 6 REPLACEMENT PARTS LIST ...

Page 3: ...1 1 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 2 SERVICING PRECAUTIONS 1 3 SERVICE INFORMATION FOR EEPROM IC SETTING 1 4 SPECIFICATIONS 1 5 ...

Page 4: ...AYS 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 SUPPLY AND UNDER CERTAIN CIR CUMSTANCES MAY PRODUCE RADIATION IN EXCESS OF DESIR ABLE LEVELS 2 ONLY FACTORY SPECIFIED C R T ANODE CONNECTORS MUST BE USED DEGAUSSING SHIELDS ALSO SERVE AS X RAY SHIELD...

Page 5: ...ng Metal 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 Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The following techniques sho...

Page 6: ... WRITED COMPLETE SCREEN Writes data on EEPROM by using REMOCON OK If completing the option data screen with a menu key Powering Off is automatically done and the option edit screen is arranged 3 PG ADJUST 1 Payback the SP standard tape 2 Press the 1 key on the Remote controller and the PLAY key on the Front Panel the same time then it goes in to Tracking initial mode 3 Repeat the above step No 2 t...

Page 7: ...More than 100 dB DVD More than 95 dB CD INPUTS VCR Audio 6 0dBm more than 10 kohms SCART 6 0dBm more than 47 kohms RCA Video 1 0 Vp p 75 ohms unbalanced SCART RCA OUTPUTS DVD VIDEO OUT 1 Vp p 75 ohms sync negative S VIDEO OUT Y 1 Vp p 75 ohms negative sync Mini Din 4 pin x 1 C 0 3 Vp p 75 ohms COMPONENT VIDEO OUT Y 1 Vp p 75 ohms negative sync RCA jack x 1 Progressive Scan Pb Pr 0 7 Vp p 75 ohms R...

Page 8: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 2 1 Cabinet and Main Frame Section 2 2 2 Packing Accessory Section 2 3 ...

Page 9: ...EXPLODED VIEWS 1 Cabinet and Main Frame Section A43 260 A44 A26 A00 250 300 462 467 467 457 467 A46 A47 468 468 468 323 265 467 465 330 452 452 261A 261A 261A 261A 274 284 286 283 285 280 A 5 4 3 2 1 B C D ...

Page 10: ...Y 808 BAG 804 PACKING OPTIONAL PARTS 803 806 INSTRUCTION ASSEMBLY CABLE COAXIAL 810 CABLE ASS Y RF 801 REMOCON 900 BOX CARTON 802 PACKING 803 811 812 PLUG ASS Y 1WAY YELLOW PLUG ASS Y 2WAY RED WHITE 821 SCART CABLE 813 PLUG ASS Y 1WAY BLACK ...

Page 11: ...PONENT SIDE 3 52 3 SMPS P C BOARD 3 54 DVD PART ELECTRICAL TROUBLESHOOTING GUIDE 3 56 1 SYSTEM OPERATION FLOW 3 56 2 SYSTEM TEST FLOW 3 57 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 3 63 1 SYSTEM 27MHZ CLOCK RESET FLASH R W SIGNAL 3 63 2 SDRAM CLOCK 3 65 3 TRAY OPEN CLOSE SIGNAL 3 65 4 SLED CONTROL RELATED SIGNAL NO DISC CONDITION 3 66 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION 3 66 6...

Page 12: ... 12 PMD01 HFM_VCC RF_OUT LD_DVD MD_DVD VR_DVD GND_PD VREF VCC F E A D C B FOCUS TRACKING TRACKING FOCUS SW_PDIC GND_LD LD_CD MD_CD VR_CD FROM P UP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 PMD02 SPM SPM FM FM LM LM OPEN CLOSE GND SW GND FROM MD 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 P3D02 CTL CTL A E A E A REC A...

Page 13: ...check the distance time difference which is from the selected A B Head point of the H SW TP signal to the starting point of the vertical synchronized signal to 6 5H 0 5H 412µs 1H 63µs PG Adjustment Method a 1 Payback the SP standard tape b 2 Press the 1 key on the Remote controller and the PLAY key on the Front Panel the same time then it goes in to Tracking initial mode c 3 Repeat the above step ...

Page 14: ... the D106 YES YES YES YES YES YES YES YES YES YES Is Vcc 9V 18V supplied to IC101 Pin2 NO Is the D118 normal Is there about 2 5V at the IC103 Vref Is the D111 normal Is the D110 normal Is the D106 normal Replace the D113 Is the D113 normal Is the D107 normal Power Line of Main PCB is short Is the D108 normal NO NO NO Replace the D108 Replace the D107 YES YES YES YES NO 5 0V Check or Replace the D1...

Page 15: ...C152 pin1 Is there about 3 3V 5V at the IC154 pin4 Check the IC152 Replace NO NO YES YES YES No 12VA To Cap Drum Motor Check or Replace D110 Is the Vcc 13V sup plied to C123 Is the D117 D115 Normal NO Check the D117 D115 NO YES YES Check or Replace the Cap Drum YES No REG 12VT Check or Replace the D110 Is the Vcc 13V supplied to Q156 Collector Is the Vcc 13V sup plied to Q156 Base NO NO Check the ...

Page 16: ...PWR CTL H signal from µ com No 24V Is the Vcc 24V supplied to Q153 Emitter YES Is the Q154 Base H YES Check or Replace the Q153 YES Check or Replace the D106 NO NO Check the PWR CTL H signal from µ com No 33VT Is the Vcc 33V supplied to Q161 Emitter YES Is the Q173 Base H YES Check or Replace the Q161 YES Check or Replace the D113 NO NO Check the TIMER CTL H signal from µ com ...

Page 17: ... Refer to SMPS 5 3VA troubleshooting Check the IC501 Pins68 69 70 71 Do T UP Reel Pulses appear at the Q514 Base terminal Replace the T UP Reel Sensor RS501 Check the CST SW and the peripheral circuitry Replace the IC501 The unstable loading of a Cassette tape Does the H signal appear at the IC501 Pin30 during inserting the CST Does the L signal appear at the IC501 Pin72 during inserting the CST C...

Page 18: ... Drum Motor 2 doesn t run Do the DFG Pulses appear at the PMC01 Pin11 Replace the Cap M Aren t the foil patterns and the Components between IC501 Pin104 and PMC01 Pin11 short Replace the IC501 Refer to 2 No 12VA of Power section Do the Drum PWM Pulses appear at the IC501 Pin107 Aren t the foil patterns and the Components between IC501 Pin107 and PMC01 Pin12 short Do the DFG Pulses appear at the IC...

Page 19: ...108 and PMC01 Pin9 short Does the CFG signal come into the IC501 Pin9 Aren t the foil patterns and Components between IC501 Pin108 and PMC01 Pin9 short 2 SERVO CIRCUIT 3 When the Capstan Motor doesn t run NO NO NO YES YES YES When the Capstan Motor doesn t run Does 12VA appear at the PMC01 YES Replace the IC501 YES NO NO YES Refer to SMPS CAPSTAN 12Volt Trouble Shooting Aren t the foil patterns an...

Page 20: ... KEY doesn t working KEY doesn t working Is 5V applied to the IC501 Pin36 Does LED or FLD change when a function button is pressed Refer to SMPS 5 3VA Trouble Shooting Replace the defective switches YES NO NO ...

Page 21: ...ear at the Emitter terminal of the Q309 IC802 Pin 30 Check the 5 0VT 5 3VA Line Power Circuit Is I2 C BUS signal applied to the IC301 Pins68 69 Check C316 AGC Chck the path of the signal between the IC301 Pin65 and IC501 Pin17 Replace the IC301 Does the 12VT 5 3VA appear at the Emitter terminal of the Q309 IC802 Pin 2 4 Replace the Q309 IC802 Check the 12VT 5 4VA Line Power Circuit Check the Syste...

Page 22: ...01 Pin105 Check the V H S W level Check R303 R304 Replace the IC301 Refer to SYSTEM I2 C BUS CHECK Trouble Shooting Is the V H S W signal applied to the IC301 Pin70 Is V H S W H about 3 4V at the IC301 Pin70 Clean the Drum Check the path of the Y Luminance RF signal Check C327 Check the path of the Y Luminance RF signal Check the C312 Does the Y Luminance RF signal appear at the IC301 Pin79 Is the...

Page 23: ...the line of the 5 0VT 5 3VA Line Power Circuit Replace the X301 Check the Color Pass Check the Color Rotary Circuit IC501 Pin99 Check the Color Rotary level Check the R303 Does the X301 4 43MHZ oscillate Replace the IC301 Does the Color signal appear at the IC301 Pin21 Is Color Rotary H about 3 4V Replace the IC301 NO NO NO YES YES YES YES NO NO NO YES Does the Color signal appear at the IC301 Pin...

Page 24: ...he System of REC H the IC501 Pin47 the D301 Replace the IC301 Check the line of the 5 0VT 5 3VA Line Power Circuit Check PB Mode Is the REC H signal about 4V applied to the IC301 Pin80 Check the circuit of the IC301 Pins85 86 Check REC Luminance Pass Color Pass Does PB Mdoe operate normally Does the REC RF signal appear at the IC301 Pins88 89 94 95 Check the Drum Drum Connector YES YES YES YES YES...

Page 25: ...YES Check the IIC Clock and DATA at IC801 Pins42 43 IC802 Pins32 33 YES Check the Audio of IC801 Pins16 17 YES Check the Audio of IC802 Pins22 26 YES Check the JK902 SC901 Check the IC751 Pins30 31 NO Check the DVD Audio OUT JK902 DVD_A_L_L R NO Check the Scart1 Jack SC901 Scart1 Audio in Pins2 6 NO NO Check the front Jack L5F1 L5F2 Check the Scart2 Jack SC901 Scart2 Audio in Pins2 6 NO Check the ...

Page 26: ...Audio Signals appear at IC801 Pin16 L CH 17 R CH YES Do Audio Signals appear at IC802 Pin10 L CH 16 R CH YES YES YES Do Audio Signals appear at IC802 Pins22 26 Do Audio Signals appear at JK902 Check Power 5 0V 12VT NO Check IC501 Pin106 A H SW NO NO Check the parts of µ COM IC501 Pins59 60 NO Check the Connection at P3D01 Pins7 9 NO Check the A IN line of IC802 C855 C856 NO Check the Vcc of IC802 ...

Page 27: ...Audio signals appear at IC801 Pins16 17 YES Do FM Audio signals appear at IC801 Pin36 YES Check the Contact Point of Drum Connector if good then Replace the Drum YES Check Power 5V 12VT NO Check ports of µ COM IC501 pins 59 60 Check Audio input signal of IC801 Pins2 3 TU A 4 5 DVD A 6 7 AVI A 8 9 AV2 A 10 11 AV3 A NO Replace IC801 NO NO ...

Page 28: ... Does the Video signal at the IC802 Pin30 Check the signal flow from IC802 Pin30 to SC901 Pin19 YES YES Check 33VT line NO Check 5VT line NO YES Does the Clock signal appear at TU701 Pin12 Check the lIC Clock Signal of µ COM Pin59 NO YES Does the data signal appear at TU701 Pin13 Replace Tuner Check the signal flow from TU701 Pin19 to IC301 Pin48 Check the signal from IC301 Pin65 to IC501 Pin17 Ch...

Page 29: ...801 Pins2 3 YES Check the Audio of IC801 Pins16 17 YES Check the Audio of IC802 Pins22 26 YES Check the Signal flow from IC802 Pins22 26 SC901 Pins1 3 YES Check the Tuner SIF of TU701 Pin22 NO Replace X751 NO Check the IIC Clock and Data at IC751 Pins12 13 NO Check the signal flow from IC751 Pins30 31 to IC801 Pins2 3 NO Check the IIC Clock and Data at IC801 Pins42 43 NO Check the signal flow from...

Page 30: ...CK D106 C117 R130 RECTIFIER SMOOTING BLOCK D110 C123 C163 R133 L122 C126 RECTIFIER SMOOTING BLOCK D118 D112 C129 C131 L124 L125 RECTIFIER SMOOTING BLOCK D111 C127 L123 C128 RECTIFIER SMOOTING BLOCK D113 C132 R119 CAP VCC 13VA 24V HSR H D117 D115 DRUM VCC 13VA 12VT 8V 5 3VA 5 0V 3 3V D111 2 5V 33VT TIMER H 12V REG BLOCK Q156 ZD103 C151 R150 R153 C152 8V REG BLOCK D114 IC151 R170 C154 5V S W BLOCK Q...

Page 31: ...3 22 3 23 3 VPS BLOCK DIAGRAM Combi PHILIPS VPC8007P1K s 2 Tu IF NICAM A2 BLOCK DIAGRAM From Power 159 27 731 60 59 93 94 158 872 159 871 151 5 4VA S V W MSP3417 MSP3407 SW1 SW2 AS A OUT AFT SIF ...

Page 32: ...MP Y C MIX 65 63 61 46 43 Y Delay 79 78 REC MODE 80 REC H V H SW C ROTARY DATA CLOCK C SYNC V OUT MICOM V IN4 FRONT V IN3 DEC 79 78 76 75 70 69 68 67 65 59 58 54 52 50 V IN2 S1 V IN1 TUNER 48 46 43 33 32 31 CLK IN 29 28 4 43MHz 27 21 95 94 89 88 Killer C LPF ACC BPF Main Conv Main Conv DETAIL ENH NL EMPHA W D CLIP IC301 LA71750M LP REC SP REC To Drum To Drum W D CLIP REC FM EQ Y LPF FBC AGC SW Y D...

Page 33: ... A OUT L A OUT R 17 EU2 A OUT L 19 EU2 A OUT R 20 8 9 AUDIO INPUT BLOCK VIDEO INPUT BLOCK AUDIO INPUT BLOCK OSD V IN DVD R V IN DVD A IN L DVD A IN R NORMAL AUDIO OUT To AVCP NORMAL AUDIO IN From AVCP Tu A IN L Tu A IN R DVD A IN L DVD A IN R EU1 A IN L EU1 A IN R EU2 A IN L EU2 A IN R AV2 A IN L AV2 A IN R MODULATOR A OUT To Tu Combi PHILIPS VPC8007P1K s SCART 2 ...

Page 34: ...3 28 3 29 6 SYSTEM BLOCK DIAGRAM 2fsc R524 R514 R518 R516 R589 C577 C576 L501 Q504 LD LD L M CONTROL R525 R526 Combi PHILIPS VPC8007P1K s ...

Page 35: ...IRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF FER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE 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 part number 2 Voltages...

Page 36: ...3 32 3 33 2 POWER SMPS CIRCUIT DIAGRAM 2 ...

Page 37: ...3 34 3 35 3 TU IF NICAM A2 CIRCUIT DIAGRAM EE MODE VIDEO TU MODE AUDIO ...

Page 38: ...01 Pin 84 is defective EE PB Screen doesn t appear Q305 is defective PB COLOR Signal disappear IC301 Pin70 is defective PB COLOR Signal disappear X301 is defective D301or IC301 Pin 80 REC is defective PB and Recording is failed IC301 doesn t operate IC301 Pin 69 68 are defective Normal Audio signal is not recorded Q301 Q306 are defective No mono Audio Signal in PB MODE Q302 Q303 Q314 are defective...

Page 39: ...3 38 3 39 5 Hi Fi CIRCUIT DIAGRAM PB REC 44 Pin is defective Hi Fi Audio is not appear IC801 Pins42 43 aredefective All Audio is not appear ...

Page 40: ...3 40 3 41 6 SCART JACK CIRCUIT DIAGRAM ...

Page 41: ...ve CLOCK SETTING will not operate X502 is defective µ COM will not operate ES501 ES502 LD501 are defective Auto Rew will not working RS501 RS502 Q514 Q515 are defective Auto stop occures R575 R576 R577 R578 are defective Deck will not operate IC504 is defective Reset is defective Set dead SW is defective Key service dead RC501 is defective R C will not operate ...

Page 42: ...h f7 e h f 6KO 5 V4 0Yh f h f e h fV4 0Y IC301 Pin 20 PB mode 500mvp p he he he he Me I e g heW2 6X fW2 6X e f e W2 6Xg W2 6X he f W2 6X e W2 g H W26KV 5e g h W Xe W Xe L eJ e 7 MI4 gJ 5 0MI 1 h J L fW Xe W 5g e7 f M I I X I e g 7 H N 1e 7 H N 1e 1 e7Y e Hhe7 H W2 6X N h 7 1 f W2 6X W2 eW2 6X f7 MI 1e W Yg L 1e YW26XV S 6XV e g e e e e e e 3 h J 5e 7 I4 J 5 hJ V LfW MI4 W Me e7 I4 f Y V e Y g X I4...

Page 43: ... V 2 6 V 2 6 V 5 V 1 5 V 1 5 V 5 V 0 003 V 1 58 V 5 1 V 0 005 V 0 005 V 0 003 V 0 051 V 0 05 V 0 003 V 0 003 V 2 77 V 1 9 V 0 003 V 5 09 V 4 08 V 0 003 V 2 76 V 0 002 V 0 003 V 0 003 V 2 75 V 2 75 V 2 59 V 2 35 V 0 003 V 0 002 V 2 55 V 2 55 V 2 55 V 2 55 V 2 56 V 2 63 V 2 53 V 2 27 V 5 12 V 1 68 V 1 7 V 2 V 0 08 V 1 29 V 1 83 V 3 V 0 004 V 0 004 V 0 003 V 5 11 V 4 8 V 4 7 V 2 59 V 2 6 V 5 V 2 06 V...

Page 44: ...2 V 0 023 V Q502 BASE 0 31 V 0 38 V 0 33 V EMITER 0 004 V 0 004 V 0 004 V COLECTOR 2 65 V 1 93 V 2 4 V Q504 BASE 0 59 V 0 51 V 0 50 V EMITER 0 03 V 0 03 V 0 03 V COLECTOR 3 78 V 3 75 V 3 71 V Q5S1 BASE 0 006 V 0 005 V 0 003 V EMITER 1 77 V 1 8 V 1 89 V COLECTOR 2 41 V 2 1 V 2 4 V Q515 BASE 4 94 V 0 5 4 3 V 0 4 4 9 V EMITER 0 002 V 0 003 V 0 005 V COLECTOR 0 02 V 0 2 3 5 V 0 4 4 9 V Q514 BASE 4 96 ...

Page 45: ...3 50 3 51 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD VCR DVD _SOLDER SIDE LOCATION GUIDE ...

Page 46: ...3 52 3 53 2 MAIN P C BOARD VCR DVD _COMPONENT SIDE LOCATION GUIDE ...

Page 47: ...3 54 3 55 3 SMPS P C BOARD LOCATION GUIDE NOTES Warning NOTES Parts that are shaded are critical NOTES With respect to risk of fire or NOTES electricial shock ...

Page 48: ...er Position Recieve 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 2 Jump to related disc reading procedure SLED at Inner Side 1 8032 initializes SERVO DSP RISC registers 2 Write RISC code to SDRAM 3 Reset RISC DVD PART ...

Page 49: ...ake sure the main PCBA don t short on VCCs and switch it on Is 3 3V and 1 8V DC outputs normal on main PCBA Check the regulators or related diodes Connect to PC RS232 Cable and update the FLASH memory code Update FLASH successfully A 1 Check 27MHz system clock 2 Check system reset circuit 3 Check FLASH R W enable signal PRD RWR 4 Check RS232 SIGNALS 5 Check FLASH Memory related circuit NO NO NO NO...

Page 50: ...ts properly Check the related circuit of MT1389 Have TV signal output Check the filtering and amp circuit of TV signal Check AV cable connection to TV set Does Tray move inside when it is not at closed position Normal TROUT TRIN signals Check the load OPEN CLOSE switch Normal TRCLOSE TROPEN signal Normal LOAD LOAD signal Check the cable connection between main PCBA and loader Check the Tray contro...

Page 51: ... related circuit of FMSO SL and SL output properly Check the amp circuit on motor driver Check the cable connection with MECHA Do not put in disc and tray close NO NO YES NO YES YES C Optical Lens has movements for searching Focus Proper FOSO outputs to motor driver Check FOSO connection on MT1389 and motor dirver Proper F F outputs Check the amp circuit on motor dirver Check cable connect on with...

Page 52: ...reading disc NO NO NO NO LD01 or LD02 output properly Check the laser power circuit on MT1336 and connecting to power transistor Collector voltage of power transistor is OK Check the related circuit on laser power transistor Check cable connection between transistor ouput and pick up head Put disc in Laser off Disc ID is correct Proper RFL signal on MT1389 Check the related circuit on MT1389 RFL s...

Page 53: ...he tracking control amp circuit on motor driver Check cable connection on pick up head Disc is play Check RFO RFLVL signal waveform Focus ON OK Proper signals on A B C D of MT1389 Check connections between MT1389 and pick up head Check FEO signal on MT1389 Check FOSO signal on MT1389 Check the FOSO connection on MT1389 and motor driver YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO ...

Page 54: ...tion lines on MT1389 NO YES Check the cable connection on Front pannel TEST END YES Normal Audio output when disc playback Audio DAC received correct data stream Check connection between MT1379 Audio DAC Normal Audio DAC out Check the related circuit of Audio DAC Check Audio filter amplify mute circuit NO NO NO YES YES YES E NO ...

Page 55: ...EFORMS ON SYSTEM TEST AND DEBUGGING 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 MT1389 main clock is at 27MHz X501 1 0V 27MHz FIG 1 1 2 MT1389 reset is low active PWR_CTL 5 2VA M_RESET FRONT RESET Time FIG 1 2 3 63 ...

Page 56: ...3 64 3 RS232 waveform during procedure Downloading TXD RXD FIG 1 3 4 Flash R W enable signal during download Downloading FRD FWR FIG 1 4 ...

Page 57: ...3 65 2 SDRAM CLOCK DCLK 128MHz Vp p 2 2 Vmax 2 7V FIG 2 1 3 TRAY OPEN CLOSE SIGNAL 1 Tray open close waveform TRIN TROUT TROPEN TRCLOSE FIG 3 1 ...

Page 58: ...OL RELATED SIGNAL NO DISC CONDITION FMSO 2 0V 1 4V 1 0V STBY 3 3V SL 4 7V 4 0V 2 6V SL 5 3V 4 0V 3 0V FIG 4 1 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION FOSO 1 5V 1 4V 1 3V F 4 0V 3 6V 3 2V F 4 0V 3 6V 3 2V FIG 5 1 ...

Page 59: ...3 67 6 LASER POWER CONTROL RELATED SIGNAL NO DISC CONDITION MDI1 0V 180mV LD01 5 0V 3 5V LD02 5 0V 3 6V FIG 6 1 7 DISC TYPE JUDGEMENT WAVEFORM F FE RFL FIG 7 1 DVD ...

Page 60: ...3 68 F FE RFL FIG 7 2 DVD F FE RFL FIG 7 3 CD ...

Page 61: ...3 69 F FE RFL FIG 7 4 CD 8 FOCUS ON WAVEFORM FE FOSO F F FIG 8 1 DVD ...

Page 62: ...3 70 FE FOSO F F FIG 8 2 CD 9 SPINDLE CONTROL WAVEFORM NO DISC CONDITION DMSO 1 4V 1 8V SP 3 6V 2 4V SP 3 6V 4 8V FIG 9 1 ...

Page 63: ...3 71 10 TRACKING CONTROL RELATED SIGNAL System checking TE TRSO T T FIG 10 1 DVD TE TRSO T T FIG 10 2 CD ...

Page 64: ...3 72 11 MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT SPDIF FIG 11 1 12 MT1389 VIDEO OUTPUT WAVEFORM 1 100 FIG 12 1 ...

Page 65: ...3 73 13 MT1389 AUDIO OUTPUT TO AUDIO DAC 2 COMPOSITE VIDEO SIGNAL FIG 12 2 FIG 13 1 ...

Page 66: ...3 74 FIG 14 1 14 AUDIO OUTPUT FROM AUDIO DAC ...

Page 67: ...3D 5V BCLK LRCLK DACCLK IC901 MM1623XFBE VIDEO BUFFER RS232_TXD IECDAOUT COAXIAL SPDIF D2_T 1 3 SCART_16 9 RGB_SEL 3V3M CDLD DVDLD SVREF21 5V 8V HOMESW INSW OUTSW ROMDATA 0 7 5 2VA IC501 M_REQ POWER BOARD VFD_RXD S_REQ 5 2VA 8V IIC VFD DAC_SCK IC603 4M 16BIT 4Bank SDRAM VD33D MA 00 11 DMCLK CSJ BA0 BA1 DQM WEJ CASJ RASJ IIC VFD DAC_TXD IC601 MTK MT1389 12V 5V 5 2VA YC_MIX VIDEO_SW SER3 DAC_ML0 OPE...

Page 68: ...IP FOSO TRSO FMSO DMSO TROPEN ADIN F F T T SL SL LOAD LOAD 27MHz X TAL LD0 1 LDO 2 IOA MDI 1 ALPC V20 PICKSEL LIMIT TRIN TROUT TRCLOSE STBY V1P4 IC603 4M x 16bit SDRAM MA 0 11 DQM0 DQM1 WE CAS RAS CS BA0 BA1 SDCLK SDCKE DQ 0 15 FLASH ROM PRD PWR PCE AD 0 7 A 0 20 EEP ROM SCL SDA RS232C MTK RXD TXD 2 SERVO Block Diagram ...

Page 69: ...ltage level shift VIDEO Interface AUDIO Interface VCR MICOM IC603 SDRAM 64M DCLK WE CAS RAS CS DCKE MA 0 10 DQM0 DQM1 DQ 0 15 X601 27MHz SCL SDA Y2 Y Y3 Color Y4 Y Y5 Cb Y6 Cr ASPECT 16 9 ACLK ALRCK ABCK MUTE VSCK VSDA ASDTA 0 3 ASTB SCL SDA ASPDIF PWR PCE PRD A 0 20 AD 0 7 VFD_SCK VFD_TXD M_RE Q SCKO TXDO M REQ ...

Page 70: ...O AUDIO Block Diagram IC901 VIDEO 6dB Amp IC401 AUDIO DAC 2CH IC402 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 A V JACK MPEG MPEG AUDIO L AUDIO R ADATA3 ...

Page 71: ......

Page 72: ...3 79 3 80 CIRCUIT DIAGRAMS 1 SYSTEM CIRCUIT DIAGRAM ...

Page 73: ...3 81 3 82 2 RF DSP SERVO CIRCUIT DIAGRAM ...

Page 74: ...3 83 3 84 3 AV JACK CIRCUIT DIAGRAM ...

Page 75: ...83 0 03 0 03 184 0 03 0 03 185 0 03 0 03 186 0 03 0 03 187 0 03 0 03 188 0 03 0 01 189 3 23 3 21 190 1 23 1 24 191 1 24 1 24 192 2 22 2 08 193 0 0 001 194 0 3 0 4 195 3 23 3 21 196 0 7 0 7 197 0 0 001 198 3 2 3 21 199 3 23 3 2 200 0 002 0 4 201 0 002 0 002 202 0 2 0 4 203 0 2 0 4 204 3 25 3 23 205 2 96 2 93 206 3 7 3 61 207 2 9 2 91 208 3 7 3 54 209 4 3 5 210 4 3 5 211 3 7 3 4 212 3 7 3 2 213 1 6 ...

Page 76: ...MECHANISM ADJUSTMENT Fixtures and tools for service 4 12 1 Check of Mechanism Assembly Mode 4 13 2 Previous Preparation for Deck Adjustment 4 14 3 Torque Measuring 4 14 4 Adjustment of Guide Roller Height 4 15 4 1 Prior Adjustment 4 15 4 2 Fine Adjustment 4 15 5 Adjustment of Audio Control A C Head 4 16 5 1 Prior Adjustment 4 16 5 2 Check of Tape Path between Pinch Roller and Take up Guide 4 17 5 ...

Page 77: ... A 5 T 17 19 Arm T up 1 hook A 5 T 20 Supporter capstan Chassis Hole A 6 B 17 18 21 Belt Capstan Motor Capstan 3 screws A 6 B 22 Lever F R Locking Tab A 6 B 21 22 23 Clutch Assembly D37 Washer A 6 B 24 Gear Drive Gear Cam Washer Hook A 7 B 25 Gear Sector Hook A 7 B 21 26 Brake Assembly Capstan Chassis Hole A 7 B 21 22 23 27 Plate Slider Chassis Guide A 7 B 24 2526 21 22 23 28 Lever Tension 1 Hook ...

Page 78: ...e cable flat from the Drum FPC and the Capstan Motor 2 Release 3 screws S1 on the bottom side of the chassis and separate the drum assembly 3 Release the hooks H1 H2 and separate both the holder FPC and the Cap FPC disassemble if necessary Fig A 1 Cautions in assembly of FPC Holder FPC Drum FPC Cap FPC Assembly shape seen in the reverse direction Fig A 1 1 ...

Page 79: ...SSEMBLY OF DECK MECHANISM 4 3 B E C Plate Top Arm Assembly F L Gear Assembly Rack F L Opener Door Holder Assembly CST B H3 A B Lever Assembly S W H4 E Fig A 2 Fig A 2 1 Fig A 2 2 Fig A 2 5 Fig A 2 6 Fig A 2 3 Fig A 2 4 ...

Page 80: ...4 Disassembly of Gear Assembly Rack F L Fig A 2 3 1 Separate the hook H3 while leaning ahead the hook 3 after moving the gear assembly rack F L toward the arrow A direction 2 Separate the gear assembly rack F L toward the arrow B direction CAUTIONS For the assembly correspond the gear part of gear assem bly rack F L to the gear drive 5 Opener Door Fig A 2 4 1 Separate the opener door ahead from th...

Page 81: ...Arm Assembly Cleaner Fig A 3 3 1 Separate the A part of Fig A 3 1 from the embossing of chassis and hold it up while turning it anti clockwise 11 Head F E Fig A 3 4 1 Separate the A part of the head F E from the emboss ing of chassis and hold it up while turning it anti clock wise 12 Base Assembly A C Head Fig A 3 5 1 Release a screw S5 and disassemble while holding it up Arm Assembly Cleaner Moto...

Page 82: ...while holding it upward 14 Arm Assembly Tension Fig A 4 2 1 Release the spring tension the hook H7 from the arm assembly tension 2 After releasing the hook H8 of the base tension sepa rate it while holding it up CAUTIONS Spring used for both brake assembly T and arm assembly tension is used 2EA used 15 Reel S Reel T Fig A 4 3 1 Disassemble the reel S reel T while holding it up com parison between ...

Page 83: ...se 17 Opener Lid Fig A 5 2 1 Release the B part of the opener lid from the embossing of chassis 2 Disassemble the opener lid upward while turning it anti clockwise 18 Arm Assembly Pinch Fig A 5 3 1 Hold the arm assembly pinch up 19 Arm T up Fig A 5 4 1 Turn the arm T up to release the anchor jaw H9 part of chassis and then hold it upward CAUTIONS For the assembly check the C part of the arm assemb...

Page 84: ...y 90 deg clockwise with a driver for disassembly 21 Belt Capstan Fig A 6 2 Motor Capstan Fig A 6 3 1 Separate the belt Capstan 2 Undo 3 screws S6 on the bottom side of chassis and dis assemble it upward 22 Lever F R Fig A 6 4 1 Release the locking tab L1 and then disassemble it upward 23 Clutch Assembly D37 Fig A 6 5 1 Remove the washer W1 and then disassemble it upward Fig A 6 1 Fig A 6 2 Fig A 6...

Page 85: ...or Fig A 7 3 1 Release the hook H11 of the gear sector and then hold the gear sector upward 26 Brake Assembly Capstan Fig A 7 4 1 Release the locking tab L2 on the bottom side of the plate slider and then disassemble it upward 27 Plate Slider Fig A 7 5 1 Disassemble the plate slider while holding it up 28 Lever Tension Fig A 7 6 1 Release the lever tension from the guide A of chassis while turning...

Page 86: ...r assem bly P2 and the P3 are adjusted straightly and then corre spond the gear section groove A to the plate slider hole B 32 Base Assembly P2 Fig A 8 3 Base Assembly P3 Fig A 8 4 1 Disassemble the base assembly P2 downward while mov ing it toward the arrow A direction along with the guide hole of chassis 2 Disassemble the base assembly P2 downward while mov ing it toward the arrow B direction al...

Page 87: ...ase tension from the embossing of chassis 2 Hold the base tension upward while turning it anti clock wise 35 Arm assembly Idler Jog Fig A 9 2 1 Push both B C parts in Fig A 9 2 toward the arrow direction 2 Disassemble the arm assembly idler upward CAUTIONS Take care to ensure that the D part in the drawing is not hung to chassis in disassembly Fig A 9 1 Fig A 9 2 ...

Page 88: ...D00 D006 4 Torque gauge adaptor Part No D09 R001 5 Post height adjusting driver Part No DTL 0005 6 Type driver ø5 2 Alignment tape Part No NTSC DTN 0001 PAL DTN 0002 3 Torque gauge 600g Cm ATG Part No D00 D002 SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 ...

Page 89: ... frame and separate the deck assembly Check both the hole A of gear cam and the hole A of chassis correspond Fig C 1 5 Check the mode S W on the main P C board locates at a proper position as in B of the Fig C 1 6 Connect the deck to the main P C board and perform all types of test Gear Cam Gear Drive C Mode S W B Motor Assembly L D Gear Cam Chassis Hole Gear Cam Hole A A Fixtures and tools used V...

Page 90: ...oles on the housing rail part of chassis to prevent detection of the end sensor If doing so proceeding to the stop mode is done In this status input signals of all modes can be received However operation of the Rewind and the Review is impossible since the take up reel remains at stop status and so cannot detect the reel pulse however possible for several seconds 2 Previous Preparation for Deck Ad...

Page 91: ...e of oscilloscope to the RF envelope output point and the head switching output point 2 Tracking control playback Locate it at the center Set the RF output to the maximum value via the track ing control when such adjustment is completed after the drum assembly is replaced 3 Height adjusting screw Flatten the RF waveform Fig C 4 2 4 Move the tracking control playback to the right left Fig C 4 3 5 C...

Page 92: ...he A C head If it is Turn and adjust the tilt adjusting screw to ensure that the tape corresponds to the bottom guide of the P4 and recheck the tape path after pro ceeding play for 4 5 seconds 3 Where the tape bottom is not equal to Fig C 5 3 Adjust the height by using the height adjusting screw B and then readjust it by using the tilt adjusting screw C CAUTIONS Always check the height of the A C ...

Page 93: ...in cutting off the REV mode CAUTIONS If the RF waveform is changed after adjusting the A C head perform fine adjustment to ensure the RF waveform is flat tened Adjustment Procedure 1 Connect the probe of Oscilloscope to the audio output jack 2 Ensure that Audio 1KHz 7KHz output is flattened at the maximization point by adjusting the Azimuth adjusting screw A Fig C 5 4 Fixtures and tools used Conne...

Page 94: ... ENVELOPE OUTPUT POINT V2 V1 V1 V1 V MAX 0 7 V1 V MAX 0 8 RF ENVELOPE OUTPUT HEAD RF SWITCHING OUTPUT POINT OSCILLOSCOPE Connection Diagram Waveform CH 2 CH 1 Checking Procedure 1 Check that locking time of the RF and Audio waveform is fallen within the measuring standard in conversion of the play mode from the CUE or the REV mode 2 Readjust the paragraph 5 and 6 if it deviates from the standard F...

Page 95: ...P VIEW Fig C 9 2 BOTTOM VIEW F E Head Video Head A C Head Pinch Roller Belt Capston Clutch Assembly A37 Fig C 9 3 Tape Transport System Pollution of Video Head or Tape Transport System Poor Sound Low Sound o Pollution of Audio Control Head o Pollution of Pinch Roller or Belt Capstan Belt No tape wound or tape wound loosely FF or REW impossible or slow turning Deterioration of Clutch Assembly D37 T...

Page 96: ...g C 9 4 Firstly try to use a cleaning tape 1 Use a cleaning patch if foreign materials are not removed with the cleaning tape due to severe dirty of the head Soak the cleaning patch in alcohol and put it to the head tip Smoothly turn the drum turning cylinder to the right or left In this case the cleaning patch must not be moved vertically 1 After completely drying the head test the traveling stat...

Page 97: ... Part PL 433 Yellow Gear Part PL 433 Yellow Boss Part Side Wall PL 433 Yellow Gear Part Side Application PL 433 Yellow Cam Part Side Application KG 684G Green Gear Sector Gear Cam Base Loading Gear Drive Inner Surface of Guide Rail KG 684G Green Chassis L Chassis R Gear Part 1 2 3 4 6 5 7 1 Inner Side Surface and Top Surface of Loading Path 2 Stable Adhesion Part of Base P2 P3 Coil 3 Gear Cam Shaf...

Page 98: ...PROTECTION MAINTENANCE AND CHECK OF VIDEO FUNCTION 4 22 Lever F R Base Tension GEAR AY P2 P3 LEVER F R Clutch Contact Part PL 433 Yellow Tension Arm Party Hinge Part PL 433 Yellow BASE TENSION PL 433 ...

Page 99: ...Syscon checked NO YES YES YES YES NO NO 1 Deck Mechanism A NO NO NO No F R operates Is the current mode an F R mode Check the assembly position of the Mode S W Is normal voltage applied at the Vcc1 and the Vcc2 of the Capstan motor Is the Vctl terminal voltage of the Capstan Motor applied at more than 4V Check the Servo Power circuit Replace the Capstan motor Does the Capstan motor rotate Does the...

Page 100: ... the spring pinch Replace the drum motor Check the Servo Syscon Check the Syscon µ com No cassette loading is done Insert the cassette Check the holder assembly CST Does output of the CST IN S W change In insertion of the REC tape L _ H _ L In insertion of the REC preven tion tape L _ H _ L _ H Is the CST IN S W normal Is operation of the lever assembly S W normal Check the Syscon circuit Check th...

Page 101: ...eck the Syscon circuit Check the Syscon circuit Check the Syscon circuit Does the Capstan motor turn Is the Vctl terminal voltage of the drum motor at more than 2 3V Replace the drum motor Is the Vcc voltage of the drum motor normal Check the clutch and the idler assembly YES YES YES YES YES YES YES YES NO NO NO NO NO Is the Vctl terminal voltage of the Capstan motor applied at more than 4V Replac...

Page 102: ...bly YES Is there short between the cassette switch terminal and the GND on the main P C B assembly Replace the main P C B assem bly or remove the short part NO Check the mode switch position and the Syscon circuit Replace the CST IN switch YES NO YES NO NO Replace the F L switch NO NO No cassette eject is done Does the L D motor turn in reverse Check the L D motor and the drive IC Replace the leve...

Page 103: ...embly F L Check power supply of the L D motor Check the assembly status of the holder assembly cassette Replace the gear rack F L Does the gear rack F L operate Does the opener door operate Does the arm assembly F L operate Does the L D motor operate Does the holder assembly cassette move same as the arm assembly F L Replace the front loading mechanism assembly YES YES YES YES NO NO NO YES NO YES ...

Page 104: ...4 28 EXPLODED VIEWS 100 A21 A23 A24 032 109 A22 054A 054 115 116 110 112 113 114 103 105 102 106 107 1 Front Loading Mechanism Section ...

Page 105: ...EXPLODED VIEWS 4 29 008 011 031 079 017 032 024 406 031 021 028 029 026 A03 027 022 003 004 006 007 014 015 009 409 013 016 012 OPTIONAL PART A01 405 2 Moving Mechanism Section 1 ...

Page 106: ...EXPLODED VIEWS 4 30 052 517 061 056 518 052A 055 410 032 077 076 078 060 051 064 A11 A12 067 066 065 068 069 070 023 080 058 3 Moving Mechanism Section 2 ...

Page 107: ......

Page 108: ...5 2 1 1 3 Clamp Upper 5 2 2 Tray Disc 5 2 3 Base Assembly Sled 5 3 3 1 Gear Assembly Feed 5 3 3 2 Gear Assembly Middle 5 3 3 3 Gear Assembly Rack 5 3 4 Rubber Rear 5 3 5 Frame Assembly Up Down 5 4 6 Belt Loading 5 4 7 Gear Pulley 5 4 8 Gear Loading 5 4 9 Guide Up Down 5 4 10 PWB Assembly Loading 5 4 11 Base Main 5 4 EXPLODED VIEW 1 Deck Mechanism Exploded View 5 5 CONTENTS SECTION 5 MECHANISM OF D...

Page 109: ...r Rear Frame Assembly Up Down Belt Loading Gear Pulley Gear Loading Guide Up Down PWB Assembly Loading Base Main 2 Screws 2 Locking Tabs 4 Screws 1 Screw 1 Screw 1 Locking Tab 1 Locking Tab 1 Locking Tab 1 Hook 2Screw 5 1 5 1 5 1 5 1 5 1 5 2 5 3 5 3 5 3 5 3 5 3 5 4 5 4 5 4 5 4 5 4 5 4 5 4 Bottom Bottom Procedure Parts Fixing Type Fig ure Disass embly Note When reassembling perform the procedure in...

Page 110: ...lamp Assembly Disc from the Holder Clamp 1 1 1 Plate Clamp 1 Turn the Plate Clamp to counterclockwise direction and then lift up the Plate Clamp 1 1 2 Magnet Clamp 1 1 3 Clamp Upper 2 Tray Disc Fig 5 2 1 Insert and push a Driver in the emergency eject hole A at the right side or put the Driver on the Lever B of the Gear Emergency and pull the Lever B in direction of arrow so that the Tray Disc is ...

Page 111: ...NISM DISASSEMBLY 3 Base Assembly Sled Fig 5 3 1 Release 4 Screw S2 2 Disconnect the FFC Connector C1 3 1 Gear Assembly Feed 3 2 Gear Middle 3 3 Gear Assembly Rack 1 Release the Scerw S3 4 Rubber Rear Fig 5 3 Fig 5 3 ...

Page 112: ...ock the Locking Tab L4 in direction of arrow B and then separate the Gear Pulley from the Base Main 8 Gear Loading Fig 5 4 9 Guide Up Down Fig 5 4 1 Move the Guide Up Down in direction of arrow A as Fig A 2 Push the Locking Tab L5 down and then lift up the Guide Up Down to separate it from the Base Main When reassembling place the Guide Up Down as Fig C and move it in direction arrow B until it is...

Page 113: ......

Page 114: ... Exploded View 429 429 026 010 018 013 014 017 015 015A 011 430 431 011A 012 004 001 002 003 A01 A02 020 430 430 430 430 012 021 433 433 012 012 028 022 432 024 A03 A26 025 030 015B 015C 435 029 031 431 431 431 024A 024A 024B 5 5 5 6 ...

Page 115: ......

Page 116: ...016 9965 000 25634 BASE ASSEMBLY A C HEAD ALPS 017 9965 000 25635 REEL S OTHER D37 021 9965 000 25636 BRAKE ASSEMBLY T D37 022 9965 000 25637 HEAD CIRC ST FE HEAD FOR D37 023 9965 000 25638 BASE LOADING OTHER D37 024 9965 000 25639 ARM ASSEMBLY IDLER H 026 9965 000 25640 MOTOR ASSEMBLY L D DI D37 027 9965 000 25641 GEAR WHEEL OTHER D37 028 9965 000 25642 REEL T OTHER D37 029 9965 000 25643 ARM ASS...

Page 117: ... JK5L1 9965 000 25584 FRONT A V IN DPAE 0385 JK902 9965 000 25585 RGB AV CONN RCA 910A 00 01 JK903 9965 000 25586 OPTICAL OUT PLT131 T5 12 12MBPS JK904 9965 000 25587 S VIDEO OUT DIN405 LD501 9965 000 25592 HOLDER ASSY VCR DECK MECHA END MS501 9965 000 25595 SWITCHMMS01080ZMBO5VDC1MAD37 MS501 9965 000 25594 SWSSS 51MD 3 5V 1MA ALTERNATIVE RC501 9965 000 25601 IR RECEIVER TSOP2236AY1 RS501 9965 000...

Page 118: ...B 1M2012 102JT L603 9965 000 18575 HB 1M2012 102JT L604 9965 000 18575 HB 1M2012 102JT L605 9965 000 18575 HB 1M2012 102JT L609 9965 000 18575 HB 1M2012 102JT L610 9965 000 18575 HB 1M2012 102JT L611 9965 000 18575 HB 1M2012 102JT L701 9965 000 18641 100M K 6X6 L5 TP L702 9965 000 18646 10M K 6X6 L5 TP L704 9965 000 18646 10M K 6X6 L5 TP L705 9965 000 18646 10M K 6X6 L5 TP L7V1 9965 000 18641 100M...

Page 119: ...153 9965 000 25597 KSA928A Y TO 92L Q153 9965 000 25598 STB1277LY AT ALTERNATIVE Q153 4822 130 63766 KTA1273Y ALTERNATIVE Q154 4822 130 10491 KTC3875S GR T1 Q156 9965 000 18651 2SC5344Y TP Q161 9965 000 19225 KTA1268 BL Q162 4822 130 10491 KTC3875S GR T1 Q163 9965 000 25597 KSA928A Y TO 92L Q163 4822 130 63766 KTA1273Y ALTERNATIVE Q163 9965 000 25598 STB1277LY AT TP Q164 4822 130 10491 KTC3875S GR...

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