LG LH-CX245 Series Service Manual Download Page 24

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Summary of Contents for LH-CX245 Series

Page 1: ...ANUAL MODELS LH CX245 LH CX245X LH CX246 LH CX246X LH CX247 LH CX247X LH CX640 LH CX640X CAUTION BEFORE SERVICINGTHEUNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL LH CX640 LH CX640X LH CX245 LH CX245X LH CX247 LH CX247X LH CX246 LH CX246X PROG PRESET PROG ...

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 MECHANISM OF VCR PART SECTION5 MECHANISM OF DVD PART SECTION 6 REPLACEMENT PARTS LIST ...

Page 3: ...PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 342 200 242 General Servicing Precautions 342 200 242 Insulation Checking Prodedure 342 200 242 Electrostatically Sensitive Devices SERVICE INFORMATION FOR EEPROM IC SETTING VCR 1 5 SERVICE INFORMATION FOR EEPROM DVD 1 6 SPECIFICATIONS 1 7 ...

Page 4: ... solder splashes or sharp solder points Be certain to remove all loose foreign par ticles 4 Check for physical evidence of damage or deterioration to parts and compo nents for frayed leads or damaged insulation including the AC cord and replace if necessary 5 No lead or component should touch a high current device or a resistor rated at 1 watt or more Lead tension around protruding metal surfaces ...

Page 5: ...nductive Parts include Metal panels Input terminals Earphone jacks etc ElectrostaticallySensitive ES Devices Some semiconductor solid state devices can bedamaged easily by static electricity Such componentscommonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The followin...

Page 6: ...40 tape LP 8 h E 240 tape Rewind time About 180 min E 180 tape Input level VIDEO 1 0 V p p 75 ohms unbalanced AUDIO 6 0 dBm more than 10 kohms SCART 6 0 dBm more than 47 kohms RCA Output level VIDEO 1 0 V p p 75ohms unbalanced Signal to noise ratio VIDEO Morethan 43 dB AUDIO Morethan 72 dB Hi Fi More than 42 dB Mono Dynamic range AUDIO More than 85 dB Tuner Section Tuning range FM 87 5 108 0 MHz A...

Page 7: ...Hz THD 10 Subwoofer 150W 4ohm at 30 Hz THD10 SpeakerSection LH CX640 Satellite Speaker Centre speaker Passive Subwoofer LHS CX640T LHS CX640C LHS CX640W Type 2 Way 2 Speaker 2 Way 2 Speaker 1 Way 1 Speaker Impedance 6 316 251 6 316 251 4 316 251 Frequency Response 120 20 000 Hz 120 20 000 Hz 40 1 500Hz Sound Pressure Level 82 dB W 1m 82 dB W 1m 83dB W 1m Rated Input Power 90W 90W 150W Max Input Po...

Page 8: ... LHS CX245W LHS CX247W 2 3 3 Woofer Speaker Section LHS CX246W 2 4 4 Woofer Speaker Section LHS CX640W 2 5 5 Setellite Center Speaker Section LHS CX245T LHS CX247T 2 6 6 Setellite Center Speaker Section LHS CX246T 2 7 7 Setellite Speaker Section LHS CX640T 8 Center Speaker Section LHS CX640C 9 Packing Accessory Section 2 10 ...

Page 9: ...2 2 EXPLODED VIEWS 1 CabinetandMain Frame Section OPTIONAL PARTS A 5 4 3 2 1 BCD ...

Page 10: ... STANDARD FINE 954 5208RM0056A DUCT SPK LHS D6245W OTHER PAPER PIP 955 6400WTTJ03A SPEAKER WOOFER F65C D365 TOPTONE WOOFER LHS 6 956 3701RM0104A NET ASSEMBLY SPK LHS D6245W SP 8505 957 4766RM0005A FELT Audio WF FE 3500SW 470X7X1T BL 959 353M050C SCREW DRAWING BH 3 5X16 FBK 960 3610RM0046A FOOT SPK LHS D6245W OTHER FOOT RUBB 961 6871RU9271F PWB PCB ASSEMBLY SUBSET AUDIO LHS D6230W SUBWOOFER 2 5M OR...

Page 11: ...EVA 953 3091RMW094D CABINET ASSEMBLY SPK LHS D6240W CABINET ASSY 955 6400WTTJ03A SPEAKER WOOFER CW 165B40L SAMMI WOOFER LHS D6 956 4766RM0005A FELT Audio WF FE 3500SW 470X7X1T BL 959 353M050C SCREW DRAWING BH 3 5X16 FBK 960 3610RM0024A FOOT SPK LMS 230 530 OTHER EVA PH 961 6871RU9271F PWB PCB ASSEMBLY SUBSET AUDIO LHS D6230W SUBWOOFER 2 5M OR 3 Woofer Speaker Section LHS CX246W ...

Page 12: ...FRONT SIL 952 3701RM0110A NET ASSEMBLY SPK LHS T6540W NET ASSY 953 6400WSMK03A SPEAKER WOOFER CW 210B150L 1 SAMMI WOOFER 4 O 954 3091RMW107A CABINET ASSEMBLY SPK LHS T6540W CABINET ASSY 955 4766RM0110A FELT 63 115 2T BLACK DUCT EVA 956 6871RU9251A PWB PCB ASSEMBLY SUBSET AUDIO ASSY FE 5000WE ROUND 2P TERMIN 957 3610RM0009A FOOT LXS 330 EVA BLACK PHI15X1T 952 953 954 956 955 951 950 A900 4 Woofer S...

Page 13: ...245T SP 8505 851 6400WTTC04A SPEAKER FULLRANGE F30C D366 2 TOPTONE WOOFER 6OH 852 4930RM0025A HOLDER AIR COVER LH 6230TE 853 3110RMP044A CASE LHS D6245T MOLD STANDARD 854 6871RU4116B PWB PCB ASSEMBLY SUBSET AUDIO FE 3620TE 2P NEW TERMINAL 150M 860 353M025C SCREW DRAWING TAPTITE 3X10 FBK 861 353M025W SCREW DRAWING 2 D3 0 L14 0MSWR3 FZB 862 353M025V SCREW DRAWING 2 D3 0 L6 0MSWR3 FZB ...

Page 14: ...LY SPK LHS D6240T SP 8505 851 6400WTTC04A SPEAKER WOOFER MSF 80SB20L 1 SAMMI WOOFER 6OH 852 4930RM0046A HOLDER SPK LHS D6240T MOLD PREVENTION 853 3110RMP042A CASE LHS D6240T MOLD REAR CASE 854 6871RU4116B PWB PCB ASSEMBLY SUBSET AUDIO FE 3620TE 2P NEW TERMINAL 150M 860 353M025G SCREW DRAWING TAPTITE 3X10 FZMY 861 353M025H SCREW DRAWING TAPTITE 3X16 FZMY ...

Page 15: ...LHS E6740T PRESS BK 0 6T 851 3720RMM015A PANEL AUDIO SPK LHS E6740T C MOLD FRONT 852 6400DSMX02A SPEAKER TWEETER DT 11ND 1 SAMMI TWEETER DOME 853 6400WSMC05A SPEAKER WOOFER MSF 90SB90L SAMMI WOOFER 6 OHM 854 3110RMP073A CASE LHS E6740T MOLD REAR 855 6871RU0038A PWB PCB ASSEMBLY SUBSET AUDIO LHS C640 T6745 E740 STANDARD 2 856 3040RMP037A BASE LHS E6740T MOLD BOTTOM STAND 857 3610RM0044A FOOT SPK LH...

Page 16: ...HS E6740C PRESS BK 0 6T 751 3720RMM015A PANEL AUDIO SPK LHS E6740T C MOLD FRONT 752 6400DSMX02A SPEAKER TWEETER DT 11ND 1 SAMMI TWEETER DOME 753 6400WSMC05A SPEAKER WOOFER MSF 90SB90L SAMMI WOOFER 6 OHM 754 3110RMP072A CASE LHS E6740C MOLD REAR 755 6871RU0038A PWB PCB ASSEMBLY SUBSET AUDIO LHS C640 T6745 E740 STANDARD 2 756 3040RMP036A BASE LHS E6740C MOLD BOTTOM STAND 757 3610RM0044A FOOT SPK LHS...

Page 17: ...CTION ASSEMBLY BOX REMOCON BAG PACKING PLUG ASS Y 1WAY YELLOW ANTENNA LOOP AM ANTENNA FM PLUG ASS Y 2WAY PACKING CASING PACKING CASING PACKING CASING 810 811 812 824 825 826 801 802 806 CABLE COAXIAL 822 808 900 804 803 803A 803B 803C FILTER 9 Packing Accessory Section ...

Page 18: ...T AND DEBUGGING 3 74 1 SYSTEM 27MHZ CLOCK RESET FLASH R W SIGNAL 3 74 2 SDRAM CLOCK 3 76 3 TRAY OPEN CLOSE SIGNAL 3 76 4 SLED CONTROLRELATED SIGNAL NO DISC CONDITION 3 77 5 LENSCONTROL RELATED SIGNAL NO DISC CONDITION 3 77 6 LASER POWER CONTROL RELATED SIGNAL NO DISCCONDITION 3 78 7 DISC TYPE JUDGEMENT WAVEFORM 3 78 8 FOCUS ONWAVEFORM 3 80 9 SPINDLE CONTROL WAVEFORM NO DISC CONDITION 3 81 10 TRACK...

Page 19: ...ATA 0 AMP DATA 1 A MUTE GND OPTICAL IN 123456789 10 11 12 CN901 PVD04 123456789 10 11 12 13 TUNED STEREO 12VA L OUT AGND R OUT PLL CE PLL DI PLL CLK PLL D0 DGND RDS CLK RDS DATA 123456789 10 11 12 13 PN101 PVD04 123456789 10 11 12 13 14 15 GND GND 5 3VA 5 3VA GND 3 8VA 3 8VA GND 13VA GND 33VA GND 29VA FD FD 123456789 10 11 12 13 14 15 PSV01 PVS01 123456789 10 11 12 DVD ENA M REC A GND DVD DATA OUT...

Page 20: ...fference which is from the selected A B Head point of the H SW W373 W374 signal to the starting point of the vertical synchronizedsignal to 6 5H 302 261 0 5H 416 316 274s 1H 64 316 274s 342 200 242 PG Adjustment Method a 1 Payback the SP standard tape b 2 Press the OK key on the Remote controller and the REC key on the Front Panel the same time then it goes in to Tracking initial mode c 3 Repeat t...

Page 21: ...Pin3 Is the D129 nor mal Is there about 2 5V at the IC106Vref Is the D127 normal Is the D126 normal Isthe D125 normal Is the D124 normal Checkthe Main PCB Power supply Line short 1 No 5 3VA SYS Hi Fi TUNER NO 5 0VA Check or Replace the D129 Isthere about 5 3V at the Q168 Emitter Does the H signal appear at the Q162 Check or Replace the Q162 NO Check the 316 274 com PWRCTL H NO YES YES YES 2 No 5 0...

Page 22: ...O Replace the BD101 Replace the TH101 NO NO NO Is the D108 normal Checkor Replace the D108 Replace the D122 Replace the IC103 YES YES YES YES YES YES YES Is Vcc 12 23V sup plied to IC101 Pin3 Is the D122 normal Isthereabout 2 5V at the IC103 Check the Woofer Main PCB Power supply Line short or not 5 No 32VA YES ...

Page 23: ...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 Checkthe 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 Che...

Page 24: ... Drum Motor doesn t run Do the DFG Pulses appear at the PMC01Pin11 Replace the Cap M Aren t the foil patterns and the Components between IC501 Pin104and PMC01 Pin11 short Replace the IC501 Refer to 2 No 12VAof 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 IC501 P...

Page 25: ...C501 Pin108 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 3 When the Capstan Motor doesn t run NO NO NO YES YES YES When the Capstan Motor doesn t run Does 12VAappear at the PMC01 YES Replacethe IC501 YES NO NO YES Refer to SMPS CAPSTAN 12Volt Trouble Shooting Aren t the foil patterns and componen...

Page 26: ... KEY doesn t working KEY doesn t working Is 5V applied to the IC501 Pin36 DoesLED or FLD change when a function button is pressed Refer to SMPS 5 3VA Trouble Shooting Replacethe defective switches YES NO NO ...

Page 27: ...ignal appear at the Emitter termi nal of the Q307 Q308 Check the 5 2VT 5 3VA Line Power Circuit Is I2CBUS signalapplied to the IC301 Pins68 69 Check C316 AGC Chck the path of the signal betweenthe IC301 Pin65 and IC501 Pin17 Replace the IC301 Doesthe 12VT 5 3VA appear at the Emitter termi nal of the Q804 Q308 Replace the Q804 Q308 Check the 12VT 5 3VA Line PowerCircuit Check the System Circuit Ref...

Page 28: ...05 Checkthe V H S W level Check R303 R304 Replace the IC301 Refer to SYSTEM I2C BUS CHECK Trouble Shooting Isthe V H S W signal applied to the IC301 Pin70 IsV H S W H about 3 4V at the IC301 Pin70 Cleanthe 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 Pin76 Isthe Y Luminance ...

Page 29: ...e of the 5 2VT 5 3VALine Power Circuit Replace the X301 Checkthe Color Pass Check the Color Rotary Circuit IC501Pin99 Checkthe Color Rotary level Check the R303 Doesthe X301 4 43MHZ oscillate Replace the IC301 Does the Colorsignal appear at the IC301 Pin21 Is ColorRotary H about 3 4V Replace the IC301 NO NO NO YES YES YES YES NO NO NO YES Does the Color signal appearat the IC301 Pin25 ...

Page 30: ...tem of REC H the IC501Pin47 the D301 Replace the IC301 Checkthe line of the 5 2VT 5 3VALine Power Circuit Check PB Mode Isthe REC H signal about 4V applied to the IC301Pin80 Checkthe circuit of the IC301 Pins85 86 CheckREC Luminance Pass Color Pass Does PB Mdoeoperate normally Does the REC RF signal appear at the IC301 Pins88 89 94 95 Check the Drum Drum Connector YES YES YES YES YES NO NO NO NO N...

Page 31: ... Pin4 YES Checkthe 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 JK801 Check the IC751 Pins30 31 NO Check the DVD MODULE P8D01 Pins3 5 NO Check the Scart1 Jack SC901 Scart1 Audio in Pins2 6 NO Check the front Jack PM602 Pins3 5 Check the Scart2Jack SC901 Scart2 Audio in Pins2 6 NO NO Checkthe Power5...

Page 32: ...nals appearat IC801 Pin16 L CH 17 R CH YES DoAudio 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 JK801 Check Power5 2V 12VT NO Check IC501 Pin25 A H SW NO NO Check the parts of 316 274 COM IC501 Pins59 60 NO Check the Connectionat P3D01 Pins7 9 NO Check the A IN line of IC802 C808 C809 NO Check the Vcc of IC802 Pin4 Rep...

Page 33: ...CK YES DoAudio signals appear at IC801 Pins16 17 YES Do FM Audio signals appear at IC801 Pin36 YES Checkthe Contact Point of Drum Connector if good then Replace the Drum YES CheckPower5V 12VT NO Check ports of 316 274 COM 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 34: ...oesthe Video signal at the IC802 Pin30 Checkthe signal flow from IC802 Pin30 to SC901 Pin19 YES Check 33VT line NO Check 5VT line NO YES Doesthe Clock signal appear at TU701 Pin5 Checkthe lIC Clock Signal of 316 274 COM Pin59 NO YES Does the data signal appearat TU701 Pin3 Replace Tuner Check the signal flow from TU701 Pin19 to IC301Pin48 Check the signal from IC301 Pin65 to IC501Pin17 Check the s...

Page 35: ...IC801 Pins2 3 YES Check the Audio of IC801 Pins16 17 YES Check the Audio of IC802 Pins22 26 YES Check the Signalflow from IC802 Pins22 26 SC901 Pins1 3 YES Check the Tuner SIF of TU701 Pin22 NO Replace X751 NO Check the IICClockand Data at IC751 Pins12 13 NO Checkthe signalflow from IC751 Pins30 31 to IC801 Pins2 3 NO Check the IIC Clock and Data at IC801 Pins42 43 NO Check the signalflow from IC8...

Page 36: ...123 C130 ZD121 R127 RECTIFIER SMOOTHING BLOCK D126 C140 L123 C146 RECTIFIER SMOOTHING BLOCK D125 R129 C138 FEED BACK BLOCK R122 R121 C136 R123 R124 R125 R126 PWR SENSE BLOCK R184 R185 RECTIFIER SMOOTHING BLOCK D124 C137 R128 DRIVE S W BLOCK QUASI RESONANT BLOCK IC101 R114 R115 C123 C107 BC101 D108 R101 D102 R102 D103 R106 ZD102 Z101 C108 R104 C109 C110 RECTIFER SMOOTHING BLOCK D122 C131 C132 C133 ...

Page 37: ... TIMER H FROM 316 274 COM PWR CTL H PMS01 5 3VA 5 0VA 8V GND 9V A GND 3 5VA 5V GND 3 3V A GND GND 1 2 3 4 5 6 7 8 9 10 11 12 PMD03 33VT BLOCK Q163 Q164 R168 R169 R170 8V BLOCK IC160 D163 C163 R161 9V BLOCK Q162 R171 ZD163 C175 3 5V BLOCK IC161 D164 C173 3 3V BLOCK IC162 R172 C165 REG 5V Q166 C166 C167 R174 ZD161 5V BLOCK IC163 C177 5 2V BLOCK Q167 C168 R175 R176 R177 PWR CTL BLOCK Q169 C170 R181 R...

Page 38: ...3 23 3 24 4 VPS BLOCK DIAGRAM 358 VPS V out VSUP CVBS Iref VC01 VCS CSO SDA SCL GND PD1 PD2 VC02 3 Tu IF NICAM A2 BLOCK DIAGRAM From Power 60 59 93 94 158 872 160 871 151 5 3VA 5 2VT MOD V IN ...

Page 39: ...3 25 3 26 5 Y C BLOCK DIAGRAM PBMODE V H SW C ROTARY DATA CLOCK C SYNC V OUT MICOM S2 V OUT S1 V OUT REC MODE REC H V H SW C ROTARY D ATA CLOCK C SYNC V OUT MICOM V IN4 FRONT V IN3 DEC ...

Page 40: ...01 A OUT To JACK 37 1 2 3 4 5 6 7 10 11 21 22 36 35 16 A OUT L A OUT R 17 AUDIO INPUT BLOCK VIDEO INPUT BLOCK AUDIO INPUT BLOCK 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 AV1 A IN L AV1 A IN R AV2 A IN L AV2 A IN R MODULATOR A OUT ToTu ...

Page 41: ...3 29 3 30 7 SYSTEM BLOCK DIAGRAM 2fsc R524 R514 R518 R516 R589 C577 C576 L501 Q504 LD LD L M CONTROL R525 R526 IC501 HD6432197A DAV OTPB LED H R C IN 2W NC CST SW CANALDET H ...

Page 42: ...1 D124are defective No power BD101 TH101 are defective IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS UNDER NO CIR CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG ELECTRONICS CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICALTO THOSE IN THE ORIGINAL CIR CUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION ...

Page 43: ... defective No power BD101 TH101 are defective IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS UNDER NO CIR CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG ELECTRONICS CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICALTO THOSE IN THE ORIGINAL CIR CUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRC...

Page 44: ...3 35 3 36 3 POWER SMPS CIRCUIT DIAGRAM 2 A B C D E F G H I J K L M N O P Q R ST ...

Page 45: ...3 37 3 38 A B C D E F G H I J K L M N O P Q R ST EE MODE VIDEO TU MODE AUDIO 4 TU IF NICAM A2 CIRCUITDIAGRAM ...

Page 46: ...ng is failed IC301 Pin 84 is defective EE PB Screen doesn t appear Q305is defective PB COLOR Signal disappear IC301 Pin70 is defective PB COLOR Signal disappear X301 is defective D301orIC301 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 FL301 Q301 Q306are defective No mono Audio Signal in PB MODE Q302 Q303...

Page 47: ...3 41 3 42 6 Hi Fi CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R ST PB REC 44 Pin is defective Hi Fi Audio is not appear IC801 Pins42 43 aredefective All Audio is not appear ...

Page 48: ...3 43 3 44 7 SCART JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R ST ...

Page 49: ... IC505 is defective VCR will not operate X501 is defective CLOCK SETTING will not operate X502 is defective 316 274 COM will not operate ES501 ES502 LD501 are defective Auto Rew will not working RS501 RS502 Q514 Q515are defective Auto stop occures R575 R576 R577 R578 are defective Deckwill not operate IC504 is defective Reset is defective Set dead ...

Page 50: ...3 47 3 48 9 TIMER CIRCUIT DIAGRAM_0TOOL A B C D E F G H I J K L M N O P Q R ST ...

Page 51: ...3 49 3 50 10 TIMERCIRCUITDIAGRAM_5TOOL 7TOOL A B C D E F G H I J K L M N O P Q R ST ...

Page 52: ...3 51 3 52 11 TIMERCIRCUIT DIAGRAM_6TOOL A B C D E F G H I J K L M N O P Q R ST ...

Page 53: ...1 Pin 24 PB REC mode 5Vp p IC301 Pins 71 72 REC mode 340mVp p IC301 Pins 51 54 PB mode 300mVp p IC301 Pin 63 PB mode 400mVp p IC301 Pin 11 PB mode 3 6Vp p _ IC301 Oscilloscope Waveform IC501 Waveform Photographs V HSW IC501 Pin 105 1V 10mS REC PB MODE DV SYNC IC501 PIN 109 1V 100uS QUE REV MODE CTL IC501Pin 3 1V 10mS CTL IC501 Pin4 1V 10mS DFG FG IC501PIN 103 104 1V 10mS REC PB MODE CFG IC501Pin9 ...

Page 54: ... 21 5 18 3 1 0 0 0 0 0 0 0 0 0 0 pulse pulse 5 2 pulse 5 2 0 0 4 9 4 7 5 1 5 1 5 3 58 2 8 5 1 0 0 0 5 2 5 2 0 0 3 0 0 1 36 0 0 0 0 3 3 5 2 0 0 0 pulse 0 0 18 0 5 2 5 2 0 4 8 0 0 0 0 4 8 0 0 0 0 0 pulse 0 0 0 0 0 0 5 2 0 0 0 0 5 1 0 2 5 3 5 pulse 5 1 0 5 2 5 2 5 2 0 0 5 1 0 0 1 3 0 0 0 0 15 3 3 5 2 2 5 2 7 3 5 pulse pulse 0 16 0 16 5 2 5 2 0 4 8 2 3 0 0 0 4 8 0 0 0 5 1 0 0 0 1 0 1 0 26 0 26 5 1 0 0...

Page 55: ...0 0 4 9 7 8 7 8 3 1 9 3 3 5 0 0 5 2 0 0 0 0 5 0 3 1 22 5 1 13 9 5 18 33 5 0 5 2 5 23 0 4 9 0 0 0 0 4 9 0 0 0 3 7 5 2 3 8 5 2 0 2 52 3 8 0 21 8 5 1 13 5 5 18 33 2 0 5 2 5 24 0 4 9 4 86 0 0 0 4 9 0 0 0 2 4 5 2 3 8 Pulse Pulse 2 5 3 8 0 22 5 13 4 5 17 33 3 0 5 2 5 2 0 1 6 14 4 0 0 0 4 6 0 0 0 2 4 5 2 3 7 Pulse Pulse 3 3 7 0 21 0 12 7 4 46 32 8 0 74 4 48 5 7 0 68 0 4 9 0 0 13 1 8 4 9 1 9 2 3 0 68 0 23...

Page 56: ...3 59 3 60 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD ...

Page 57: ...3 61 3 62 2 KEY LEFT P C BOARD 0TOOL 5TOOL 7TOOL 6TOOL ...

Page 58: ...3 63 3 64 3 KEY RIGHT P C BOARD 0TOOL 5TOOL 7TOOL 6TOOL ...

Page 59: ...3 65 3 66 4 POWERP C BOARD 0TOO L 5TOOL 6TOOL 7TOOL LOCATION GUIDE ...

Page 60: ...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 Routine Loop 1 Judge whether have disc and disc type 2 Jump to related discreading procedure SLED at Inner Side 1 8032 initializes SERVO DSP RISC registers 2 Write RISCcodeto SDRAM 3 Reset RISC DVD PART ...

Page 61: ...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 Connectto PC RS232Cable 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 RS232SIGNALS 5 Check FLASH Memory related circuit NO NO NO NO YE...

Page 62: ...s 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 control...

Page 63: ...e related circuit of FMSO SL and SL output properly Checkthe 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 movementsfor searching Focus Proper FOSO outputs to motor driver Check FOSOconnection on MT1389 and motor dirver Proper F F outputs Checkthe amp circuit on motor dirver Check cable connect on with pi...

Page 64: ... reading disc NO NO NO NO LD01 or LD02 output properly Check the laser power circuit on MT1336 and connectingto 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 65: ...he tracking control amp circuit on motor driver Check cable connectionon 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 FOSOconnection on MT1389 and motor driver YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO ...

Page 66: ...ation lines on MT1389 NO YES Checkthe cable connection on Front pannel TEST END YES Normal Audio output when disc playback Audio DAC received correct data stream Check connectionbetween 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 67: ...VEFORMS ON SYSTEM TEST AND DEBUGGING 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 MT1389 main clockis 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 74 ...

Page 68: ...3 75 3 RS232waveform duringprocedure Downloading TXD RXD FIG 1 3 4 Flash R W enable signal during download Downloading FRD FWR FIG 1 4 ...

Page 69: ...3 76 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 70: ...OL RELATED SIGNAL NO DISCCONDITION 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 71: ...3 78 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 72: ...3 79 F FE RFL FIG 7 2 DVD F FE RFL FIG 7 3 CD ...

Page 73: ...3 80 F FE RFL FIG 7 4 CD 8 FOCUS ON WAVEFORM FE FOSO F F FIG 8 1 DVD ...

Page 74: ...3 81 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 75: ...3 82 10 TRACKING CONTROLRELATED SIGNAL System checking TE TRSO T T FIG 10 1 DVD TE TRSO T T FIG 10 2 CD ...

Page 76: ...3 83 11 MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT SPDIF FIG 11 1 12 MT1389 VIDEO OUTPUT WAVEFORM 1 100 FIG 12 1 ...

Page 77: ...3 84 13 MT1389 AUDIO OUTPUT TO AUDIODAC 2 COMPOSITE VIDEO SIGNAL FIG 12 2 FIG 13 1 ...

Page 78: ...3 85 FIG 14 1 14 AUDIO OUTPUT FROMAUDIODAC ...

Page 79: ...06 222FRONTL 2 342 200 242R303 342 206 222FRONTR 3 342 200 242 R309 342 206 222 SURROUND L 4 342 200 242 R301 342 206 222 SURROUND R 5 342 200 242 R307 342 206 222 CENTER 6 342 200 242 R305 342 206 222 WOOFER 15 DVD AMP WAVEFORMS ...

Page 80: ...A29LV800TA 70 1M 8BIT FLASH MA 00 11 DQ 00 15 DQM 0 1 IC505 KS24C021CS 2Kb EEPROM J501 RS 232 PDV03 CONTROL SIGNAL URST IC507 MM1623XFBE VIDEO 6dB AMP 5V PDV02 ANALOG A V SIGNAL JK601 S VIDEO Y 1 6 D2 T1 T2 T3 JKS 01 SPEAK ER TERMINAL X201 12 288MHz REG 9V PN102 DL JIG FRONT REAR C SW DALRCK DABCK DN_MIX AMCLK ADATA JK602 OPT ...

Page 81: ... 1M 8BIT FLASH MA 00 11 DQ 00 15 DQM 0 1 IC505 KS24C021CS 2Kb EEPROM J501 RS 232 PDV03 CONTROL SIGNAL URST IC507 MM1623XFBE VIDEO 6dB AMP 5V PDV02 ANALOG A V SIGNAL JK601 S VIDEO Y 1 6 D2 T1 T2 T3 JKS 01 SPEAK ER TERMINAL X201 12 288MHz RE G 9V PN102 DL JIG FRO NT REAR C SW DALRCK DABCK DN_MIX AMCLK ALRCK ABCK ADATA JK602 OPT ...

Page 82: ...3 89 DQ 0 15 3 SERVO Block Diagram ...

Page 83: ...3 90 4 MPEG MEMORYBlock Diagram DCLK WE CAS RAS CS DCKE MA 0 10 DQM0 DQM1 DQ 0 15 PWR PCE PRD A 0 20 AD 0 7 ...

Page 84: ...3 91 5 VIDEO AUDIO Block Diagram ...

Page 85: ...3 92 6 DVD AMP Block Diagram ADATA 0 1 2 DO CS CLK DI INT0 INT1 RST AMCLK ALRCK ABCK ...

Page 86: ...A B C D E F G H I J K L M N O P Q R ST 3 93 3 84 CIRCUIT DIAGRAMS 1 MPEG CIRCUIT DIAGRAM ...

Page 87: ...A B C D E F G H I J K L M N O P Q R ST 3 95 3 96 2 RF SERVO CIRCUIT DIAGRAM ...

Page 88: ...A B C D E F G H I J K L M N O P Q R ST 3 97 3 98 3 AUDIO 316 274_COM CIRCUIT DIAGRAM DVD AMP ...

Page 89: ...A B C D E F G H I J K L M N O P Q R ST 3 99 3 100 4 DIGITALAMPCIRCUIT DIAGRAM DVD AMP _200W ...

Page 90: ...4 DIGITAL AMP CIRCUIT DIAGRAM DVD AMP _400W A B C D E F G H I J K L M N O P Q R ST 3 101 3 102 ...

Page 91: ...5 PWM CODEIC CIRCUIT DIAGRAM DVD AMP _200W A B C D E F G H I J K L M N O P Q R ST 3 103 3 104 ...

Page 92: ...5 PWM CODEIC CIRCUIT DIAGRAM DVD AMP _400W A B C D E F G H I J K L M N O P Q R ST 3 105 3 106 ...

Page 93: ...6 INTERFACECIRCUITDIAGRAM DVD AMP _200W A B C D E F G H I J K L M N O P Q R ST 3 107 3 108 ...

Page 94: ...6 INTERFACECIRCUITDIAGRAM DVD AMP _400W A B C D E F G H I J K L M N O P Q R ST 3 109 3 110 ...

Page 95: ...2 34 37 1 37 2 04 38 1 37 1 33 390 00 0 40 1 37 1 37 STOP PLAY MODE PIN NO 41 1 37 1 37 42 1 37 1 4 43 0 00 0 44 1 57 1 57 45 1 57 1 57 46 3 28 3 28 47 2 96 2 84 48 3 28 3 28 490 00 0 00 50 3 26 3 24 51 0 00 0 00 52 1 80 1 80 53 1 97 2 12 54 2 00 1 89 55 1 92 1 76 56 2 14 1 45 57 2 02 1 72 58 2 04 2 23 591 391 50 60 1 12 0 02 61 0 00 0 00 62 0 00 0 00 63 1 891 9 6 64 0 00 0 00 65 3 16 3 15 66 3 28...

Page 96: ...0 1 64 1 72 41 1 18 1 1 42 1 4 1 3 43 1 04 1 17 44 1 42 1 33 45 2 04 1 88 46 0 0 47 0 0 48 1 0 00 0 00 2 17 27 17 27 3 17 27 17 27 4 35 31 35 31 5 0 00 0 00 6 0 00 0 00 7 35 31 35 31 8 17 2917 29 917 2917 29 10 17 27 17 27 11 17 27 17 27 12 35 31 35 31 13 0 31 0 31 14 0 33 0 33 15 35 31 35 31 16 35 31 35 31 17 35 31 35 31 18 0 00 0 43 190 00 0 00 20 0 02 0 00 21 4 98 4 98 22 4 98 4 98 23 3 27 3 27...

Page 97: ...3 72 18 4 20 4 20 198 00 8 00 20 1 37 1 37 21 1 81 1 81 22 1 37 1 37 23 3 23 3 23 24 5 20 5 20 STOP PLAY MODE PIN NO 25 2 54 2 54 26 2 73 2 73 27 2 62 2 62 28 2 65 2 65 100 2 1 67 1 67 3 1 67 1 67 4 1 67 1 67 5 1 67 1 67 6 1 67 1 67 7 1 67 1 67 8 1 99 1 99 92 0 2 0 10 2 0 2 0 11 2 0 2 0 12 1 40 1 40 13 1 47 1 41 14 1 47 1 47 15 1 44 1 44 16 1 53 1 53 17 1 54 1 43 18 1 96 2 10 191 9 6 2 06 20 0 00 ...

Page 98: ... 15 62 11 15 62 15 62 12 31 5931 59 13 0 00 0 00 14 0 00 0 00 15 31 5931 59 16 15 61 15 61 17 15 61 15 61 18 NC NC 190 00 0 00 20 0 02 0 02 21 5 02 5 02 22 5 02 5 02 23 3 24 3 24 24 0 00 0 00 25 3 15 3 15 26 3 15 3 15 27 3 15 3 15 28 3 24 3 24 291 58 1 58 30 1 58 1 58 31 1 58 1 58 32 1 58 1 58 33 26 30 26 30 34 26 30 26 30 35 31 58 31 58 36 31 58 31 58 IC750 AMP STA508 IC730 AMP STA508 STOP PLAY M...

Page 99: ...3 119 3 120 LOCATION GUIDE LOCATION GUIDE PRINTED CIRCUIT DIAGRAMS 1 DVD AMP P C BOARD_200W ...

Page 100: ...3 121 3 122 2 DVD AMP P C BOARD_400W ...

Page 101: ......

Page 102: ...CK MECHANISM ADJUSTMENT 342 200 242 Fixtures and tools for service 4 12 1 Checkof Mechanism Assembly Mode 4 13 2 Previous Preparationfor 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 FineAdjustment 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 upGu...

Page 103: ...y Pinch Shaft 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 Te...

Page 104: ...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 Releasethe 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 105: ...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 106: ...is 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 assemblyrack F L toward the arrow A direction 2 Separate the gear assemblyrack 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 Separatethe opener door ahead from th...

Page 107: ...rm Assembly Cleaner Fig A 3 3 1 Separate the A part of Fig A 3 1from 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 Motor ...

Page 108: ...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 109: ...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 checkthe C part of the arm assembl...

Page 110: ...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 111: ...r Fig A 7 3 1 Release the hook H11 of the gear sectorand 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 i...

Page 112: ...r assem bly P2 and the P3 are adjusted straightly and then corre spond the gear sectiongroove A to the plate slider hole B 32 Base AssemblyP2 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 alon...

Page 113: ...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 114: ...art No D00 D006 4 Torquegaugeadaptor Part No D09 R001 5 Post height adjusting driver Part No DTL 0005 6 Type driver 303 2705 2 Alignment tape Part No NTSC DTN 0001 PAL DTN 0002 3 Torquegauge 600g Cm ATG Part No D00 D002 SRK VIDEO CASSETTE TORQUE METER VHT 303 SRK VHT S SRK VHT T 300 250200 150 50 0 300 250 200 150 50 0 100 ...

Page 115: ...ate the deckassembly Checkboth 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 Connectthe deck to the main P C board and perform all types of test GearCam Gear Drive C Mode S W B Motor Assembly L D Gear Cam Chassis Hole GearCam Hole A A Fixtures and tools used VCR VCP status Checkin...

Page 116: ...is case clog both holes on the housing rail part of chassis to prevent detection of the end sensor If doing so proceeding to the stop modeis done In this status input signals of all modes can be received However operation of the Rewind and the Review is impossible sincethe take up reel remains at stop status and so cannot detect the reel pulse however possible for several seconds 2 Previous Prepar...

Page 117: ...put 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 Check the start and the end of the RF out...

Page 118: ...lt 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 head since most ideal height of A C head ca...

Page 119: ...erform fine adjustment to ensure the RF waveform is flat tened Adjustment Procedure 1 Connect the probeof 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 Connection position VCR VCP status Adjustment position 342 200 242 Oscilloscope 342 200 242 Standard te...

Page 120: ...m RF 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 standa...

Page 121: ...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 Tor...

Page 122: ...Fig C 9 4 Firstly try to use a cleaning tape 1 Usea 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 sta...

Page 123: ... 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 BaseLoading 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 Shaft...

Page 124: ...PROTECTION MAINTENANCE AND CHECK OF VIDEO FUNCTION 4 22 Lever F R Base Tension GEARAY P2 P3 LEVER F R Clutch Contact Part PL 433 Yellow Tension Arm Party Hinge Part PL 433 Yellow BASE TENSION PL 433 ...

Page 125: ... 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 assemblyposition 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 Capstanmotor rotate Does the ...

Page 126: ...he spring pinch Replace the drum motor Check the Servo Syscon Check the Syscon 316 274 com No cassette loading is done Insert the cassette Check the holder assembly CST Doesoutput 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 assemblyS W normal Check the Syscon circuit Check ...

Page 127: ...heck the Syscon circuit Check the Sysconcircuit Check the Syscon circuit Does the Capstanmotor turn Is the Vctl terminal voltage of the drum motor at more than 2 3V Replace the drum motor Is the Vccvoltage 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 Replace ...

Page 128: ...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 Replacethe lever...

Page 129: ...sembly 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 Doesthe arm assembly F L operate Does the L D motor operate Does the holder assembly cassette move same as the arm assembly F L Replacethe front loading mechanism assembly YES YES YES YES NO NO NO YES NO YES N...

Page 130: ...4 28 EXPLODED VIEWS 1 Front LoadingMechanism Section ...

Page 131: ...EXPLODED VIEWS 4 29 OPTIONAL PART 2 Moving Mechanism Section 1 ...

Page 132: ...EXPLODED VIEWS 4 30 3 Moving MechanismSection 2 ...

Page 133: ......

Page 134: ...1 1 2 Magnet Clamp 5 2 1 1 3 Clamp Upper 5 2 2 Tray Disc 5 2 3 BaseAssembly 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 GearPulley 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...

Page 135: ...ly 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 reverse order The ...

Page 136: ...lamp Assembly Discfrom the Holder Clamp 1 1 1 Plate Clamp 1 Turn the Plate Clamp to counterclockwisedirection 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 ej...

Page 137: ...HANISM DISASSEMBLY 3 BaseAssembly Sled Fig 5 3 1 Release4 Screw S2 2 Disconnect the FFC Connector C1 3 1 Gear Assembly Feed 3 2 Gear Middle 3 3 Gear Assembly Rack 1 Releasethe Scerw S3 4 Rubber Rear Fig 5 3 Fig 5 3 ...

Page 138: ...ig 5 4 1 Unlock 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 GuideUp 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 ...

Page 139: ......

Page 140: ...ismExplodedView 429 429 026 010 018 013 014 017 015 015A 011 430 431 011A 012 004 001 002003 A01 A02 020 430 430 430 430 012 021 433 433 012 012 028 022 432 024 A03 A26 025 030 015B 015C 435 029 431 431 431 024A 024A 024B 5 5 5 6 ...

Page 141: ......

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LG LH-CX245 Series, Service Manual

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Summary of Contents for LH-CX245 Series

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