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ELECTRICAL TROUBLESHOOTING GUIDE

Any Key Power on.

(except for “eject ”)

Is Power turn on?

OK,but no work

Check Q260 Emitter.5 Volt is OK.

Check IC201 “1 ”Pin ,5Volt is OK.

Check Q230 Collector ,0 Volt is OK.

Check IC804 “1 ”,”3 ”Pin.14Volt ,9Volt is OK.

Check IC401 “3 ”,”9 ”,”37 ”,”51 ”,”52 ”,”56 ”,

”57 ” 5 Volt is OK.

Check Clock ,“38 ”,”39 ”

CHECK LOADING SUPPLY CIRCUITRY
1.Q271,Q350,Q353
2.IC401 PIN1
3.LOOK FOR PN505 CONNECTION

Check Q380,Q381 Collector ,14Volt is OK

Check Q382 Base ,5 Volt is OK

CHECK Q260

CHECK

Q380,Q381,Q382

CHECK

IC201

CHECK

Q230

CHECK

IC804

CHECK

IC401

Disc NO loading?

(1) No Power.

SECTION 2. ELECTRICAL

Содержание LAC-M5530EK

Страница 1: ...SERVICE MANUAL MODEL LAC M5530EK LAC M5531EK CAR CD RECEIVER SERVICE MANUAL MODEL LAC M5530EK LAC M5531EK CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ...

Страница 2: ... 2 ELECTRICAL ELECTRICAL TROUBLESHOOTING GUIDE 2 1 WAVEFORMS OF MAJOR CHECK POINT 2 11 INTERNAL BLOCK DIAGRAM of ICs 2 13 BLOCK DIAGRAM 2 27 SCHEMATIC DIAGRAM 2 29 PRINTED CIRCUIT DIAGRAM 2 35 SECTION 3 CABINET MAIN CHASSIS MECHANISM EXPLODED VIEW 3 1 SECTION 4 REPLACEMENT PARTS LIST 4 1 CONTENTS ...

Страница 3: ...itive lead Always remove the test instrument ground lead last 1 The service precautions are indicated or printed on the cabinet chassis or components When servicing follow the printed or indicated service precautions and service materials 2 The Components used in the unit have a specified conflammability and dielectric strength When replacing any components use components which have the same ratin...

Страница 4: ...harges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparabl...

Страница 5: ...Hz 520 1 620kHz Intermediate frequency 10 8MHz 450kHz Usable sensitivity 12dBµV 32dBµV Signal to noise ratio 55dB 45dB 3 COMPACT DISC SECTION Frequency response 40Hz 20kHz Channel separation 50dB 1kHz Signal to noise ratio 70dB 4 AUDIO SECTION Maximum output power 50W x 4 Speaker impedance 4Ω x 4 or 8Ω x 4 NOTE The design and specifications are subject to change without notice in the sourse of pro...

Страница 6: ...OK Check Q230 Collector 0 Volt is OK Check IC804 1 3 Pin 14Volt 9Volt is OK Check IC401 3 9 37 51 52 56 57 5 Volt is OK Check Clock 38 39 CHECK LOADING SUPPLY CIRCUITRY 1 Q271 Q350 Q353 2 IC401 PIN1 3 LOOK FOR PN505 CONNECTION Check Q380 Q381 Collector 14Volt is OK Check Q382 Base 5 Volt is OK CHECK Q260 CHECK Q380 Q381 Q382 CHECK IC201 CHECK Q230 CHECK IC804 CHECK IC401 OK Disc NO loading 1 No Po...

Страница 7: ...01 pin89 defective X401 C415 C416 Q260 PN401 front PCB pattern defective IC401 Pin66 67 87 front PCB pattern defective IC901 Surrounding circuit PCB pattern defective Is u com IC401 reset circuit normal Pin88 Is u com IC401 keyin Pin9 37 51 52 64 5volt input Is u com IC401 Pin 66 67 87 output waveform normal Is IC901 Com1 Com2 Com3 output waveform normal Display LCD connector defective Is u com IC...

Страница 8: ... 2 3 3 CD PART ...

Страница 9: ... 2 4 READING DISPLAY CHECK ONLY CD DISPLAY ...

Страница 10: ... 2 5 READING OK CHECK NO DISC DISPLAY ...

Страница 11: ... 2 6 READING OK CHECK A NO DISC DISPLAY ...

Страница 12: ... 2 7 READING OK CHECK B NO DISC DISPLAY ...

Страница 13: ... 2 8 READING OK CHECK C NO DISC DISPLAY ...

Страница 14: ... 2 9 READING OK CHECK D NO DISC DISPLAY ...

Страница 15: ... 2 10 READING OK CHECK E NO DISC DISPLAY ...

Страница 16: ...ormal play 2 SLED DRIVE AND MOTOR WAVEFORM IC504 pin5 1 4 when focus search 3 FOCUS DRIVE AND MOTOR WAVEFORM R5 1 3 IC504 pin 1 5 When focus search failed or there is no disc on the tray There is disc on tray and focus search success WAVEFORMS OF MAJOR CHECK POINT ...

Страница 17: ...SPINDLE DRIVE AND MOTOR WAVEFORM IC504 pin6 1 2 when TOC reading 5 TRACK DRIVE AND MOTOR WAVEFORM R508 IC504 pin23 during normal play 6 RF TRACKING AND FOCUS ERROR WAVEFORM IC502 pin8 2 1 23 during normal play ...

Страница 18: ... 2 13 IC401 PD784214A 1 PORT ASSIGNMENT INTERNAL BLOCK DIAGRAM of ICs ...

Страница 19: ...0 P121 RTP1 PDRV_OMUTE I O O CMOS DSP reset output 31 P122 RTP2 N C I O I CMOS Not to be used Open 32 P123 RTP3 PDSP_IDRF I O I Focusing OK signal input 33 P124 RTP4 PDSP_ORST I O O CMOS DSP reset output 34 P125 RTP5 PCD_OCEN I O O CMOS DSP chip enale output 35 P126 RTP6 N C I O I CMOS Not to be used Open 36 P127 RTP7 N C I O I CMOS Not to used Open 37 VDD VDD Positive power supply 5V 38 X2 X2 X t...

Страница 20: ...r diode option check signal 1 or 2 input1 83 P87 A7 POPT_IN2 I O I For diode option check signal 1 or 2 input2 84 P40 AD0 POPT_OUTO I O O CMOS For dinde option check signal 1 output 85 P41 AD1 POPT_OUT1 I O O CMOS For dinde option check signal 1 output 86 P42 AD2 N C I O I Not to be used Open 87 P43 AD3 PFRT_CE I O O CMOS LCD driver enable output 88 P44 AD4 PFRT_RES I O O CMOS LCD driver reset out...

Страница 21: ... 2 16 IC501 MN6627933CG ...

Страница 22: ... 2 17 1 BLOCK DIAGRAM ...

Страница 23: ...alue 30 SPPOL O Spindle drive signal output polarity 31 TRVP O Traverse drive signal output positive polarity 32 TRVM O Traverse drive signal output negative polarity 33 TRVP2 O Traverse drive signal output 2 positive polarity 34 TRVM2 O Traverse drive signal output 2 negative polarity 35 TRP O Tracking drive signal output positive polarity 36 TRM O Tracking drive signal output negative polarity 3...

Страница 24: ...ignal output 78 PMCK O 88 2 kHz clock signal output 79 TX O Digital audio interface signal output 80 FLAG O Flag signal output 81 NRST I LSI reset signal input 82 NTEST I Test mode setting input 83 DVSS3 I Ground 3 for digital circuits 84 X1 I Crystal oscillator circuit input 85 X2 O Crystal oscillator circuit output 86 IOVDD2 I Power supply 2 for digital I O 87 DVDD2 I Power supply 2 for internal...

Страница 25: ...t LWE LDQM DQI Data Input Regidter 512K x 16 512K x 16 Column Decoder Latency Burst Length Programming Register Timing Register Address Register Row Decoder LCBR LRAS Sense AMP I O Control Output Buffer Col Buffer Row Buffer Refresh Counter IC503 M12L16161A 1 PORT ASSIGNMENT 2 BLOCK DIAGRAM ...

Страница 26: ...e positive going edge of the CLK with CAS low Enables column access WE Write Enable Enables write operation and row precharge Latches data in starting from CAS WE active L U DQM Data Input Output Mask Makes data output Hi Z tSHZ after the clock and masks the output Blocks data input when L U DQM active DQ0 15 Data Input Output Data inputs outputs are multiplexed on the same pins VDD VSS Power Supp...

Страница 27: ... 2 22 IC505 AMC1117 1 BLOCK DIAGRAM ...

Страница 28: ... 2 23 IC601TDA7348D ...

Страница 29: ... 2 24 IC801 TB2903HQ ...

Страница 30: ... 2 25 IC901 PT6524 1 BLOCK DIAGRAM 2 PIN CONFIGURATION ...

Страница 31: ... 2 26 ...

Страница 32: ...2 27 2 28 BLOCK DIAGRAM ...

Страница 33: ...2 29 2 30 SCHEMATIC DIAGRAM 1 MAIN SCHEMATIC DIAGRAM ...

Страница 34: ...2 31 2 32 2 FRONT SCHEMATIC DIAGRAM ...

Страница 35: ...2 33 2 34 3 CDP SCHEMATIC DIAGRAM ...

Страница 36: ...2 35 2 36 PRINTED CIRCUIT DIAGRAM 1 MAIN P C BOARD ...

Страница 37: ...2 37 2 38 2 FRONT P C BOARD ...

Страница 38: ...2 39 2 40 2 FRONT P C BOARD ...

Страница 39: ...2 41 2 42 3 CDP P C BOARD TOP 3 CDP P C BOARD BOTTOM ...

Страница 40: ...2 43 2 44 5 LED P C BOARD BOTTOM 5 LED P C BOARD TOP 4 TRIM P C BOARD BOTTOM 4 TRIM P C BOARD TOP ...

Страница 41: ...2 251 276 287 272 271 270 269 262 258 257 261 260 259 288 268 267 266 265 264 277 273 255 256 274 275 254 453 A46 A41 280 A26 450 451 250 A44 NOTE Refer to SECTION 4 REPLACEMENT PARTS LIST in order to look for the part number of each part SECTION 3 CABINET MAINCHASSIS MECHANISM ...

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