LG FFH-164 Manual Download Page 35

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LA1837

Single-Chip Home Stereo IC with Electronic Tuning Support

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LC72131, 72131M

AM/FM PLL Frequency Synthesizer

B01

B02

B03

B04

I01

I02

XIN

AIN

AOUT

IFIN

XOUT

FMIN

AMIN

VDD

VSS

REFERENCE
DIVIDER

PHASE DETECTOR
CHARGE PUMP

UNLOCK
DETECTOR

UNIVERSAL
COUNTER

DATA SHIFT REGISTER

LATCH

12bits PROGRAMMABLE

DIVIDER

SWALLOW COUNTER

1/16. 1/17 4bits

POWER

RESET

CCB

I/F

Summary of Contents for FFH-164

Page 1: ...UBLESHOOTING 2 3 WAVEFORMS OF MAJOR CHECK POINT 2 6 BLOCK DIAGRAM 2 15 SCHEMATIC DIAGRAMS 2 17 WIRING DIAGRAM 2 25 PRINTED CIRCUIT DIARGAMS 2 27 INTERNAL BLOCK DIAGRAM OF IC s 2 37 SECTION 3 EXPLODED VIEWS CABINET AND MAIN FRAME SECTION 3 1 TAPE DECK MECHANISM AUTO STOP DECK 3 3 SECTION 4 SPEAKER 4 1 SECTION 5 REPLACEMENT PARTS LIST 5 1 ...

Page 2: ...be touched 4 Laser beams may damage the eyes Absolutely never permit laser beams to enter the eyes Also NEVER switch ON the power to the laser output part lens etc of the pick up if it is damaged 5 Cleaning the lens surface If there is dust on the lens surface the dust should be cleaned away by using an air bush such as used for camera lens The lens is held by a delicate spring When cleaning the l...

Page 3: ... bag do not place the pick up on the bag This is because there is the possibility of damage by static electricity 4 To prevent AC leakage the metal part of the soldering iron should be grounded 5 Workers should be grounded by an armband 1MΩ 6 Care should be taken not to permit the laser pick up to come in contact with clothing in order to prevent static electricity changes in the clothing to escap...

Page 4: ...es 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 comparable co...

Page 5: ...quency Response 60 10000Hz Tuning Range 522 1611kHz or 530 1610kHz AM Intermediate Frequency 450kHz Signal to noise ratio 35dB Frequency Response 100 1800 Hz AMP Output Power 5W 5W T H D 0 3 Frequency Response 42 25000Hz Signal to noise ratio 60dB TAPE Tape Speed 3000 Hz Wow Flutter 0 25 MTT 111 JIS WTD F F REW Time 120sec C 60 Frequency Response 250 8000Hz Signal to noise ratio 43dB Channel Separ...

Page 6: ... 1 6 MEMO ...

Page 7: ...tment realignment may be necessary IMPORTANT 1 Check Power source voltage 2 Set the function switch to band being aligned 3 Turn volume control to minimum unless otherwise noted 4 Connect low side of signal source and output indicator to chassis ground unless otherwise specified 5 Keep the signal input as low as possible to avoid AGC and AC action Deck Mode Test Tape Test Point Adjustment Adjust f...

Page 8: ...Check power supply circuit PN508 PIN 8 6 2V PN508 PIN 7 5V IC503 PIN 2 3 3V Check the connector PN502 PN503 PN507 Check the tracking servo circuit Check the PN508 PIN1 3 OK YES YES YES YES YES YES YES YES NO NO NO Check the DISK turns Check the Laser Check the focus circuit Check the TRAKING circuit NO NO ...

Page 9: ...eofSLDO Voltage IC501pin23 CheckthechangeofSL SL Voltage IC502pin18 19 ChecktheVoltagechangeofPN507 pin2 OPEN CLOSE Defectiveconnector PN507 Defectiveconnector PN507Defective MICOM Defectiveconnector PN507Defective IC501 DefectiveIC501 DefectiveIC502 DefectivecontactPN503 DefectivePICK UP Doeslaserlight focuscoildrivewareform TRACKINGERRORwareform Isrotationnormal DefectiveIC501 DefectivePICK UP I...

Page 10: ... 502 pin Defective MICOM Defective MICOM Defective connector Defective IC 501 502 Defective slide motor and or connector Defective LMT SW and or connector Defective Q 501 and or laser Defective laser and or connector Did pickup return to innermost circular Does it stop at inner pick circular after shift Is defect output from LM SW applied to pin of PN503 R507 1 0V R507 1 0V YES YES YES YES OPEN CL...

Page 11: ...down Check the signal of FOCUS SEARCH IC501 Pin 21 Chekc the signal of PN502 pin 13 14 Does FE signal appear IC501 pin 13 Does DRF signal appear IC 501 pin67 DefectiveIC501 DefectiveIC502 Openactivatorand orconnector DefectiveIC501 Degraded laser diode Defective PICK UP ...

Page 12: ...20mS Div 1V Div 2 When time division 1mS Div 1V Div During forward track traverse 3 When time division is 0 5nS div During backward Track Traverse 5 Feed motor drive waveform IC 502 pin18 During normal play CH1 FOCUS COIL DRIVE SIGNAL 2V Div CH2 DRF CH1 TRACKING COIL DRIVE SIGNAL 2V Div IC502 pin27 CH2 TRACKING ERROR TE IC501 pin15 1V Div CH2 TRACKING COIL DRIVE IC502 pin27 SIGNAL 2V Div CH2 TRACK...

Page 13: ...put of IC203 Check the 5 0V of Q207 C CD FUNCTION END Replace the Fuse Check the AC output of H202 pin 1 4 Check the AC output of H202 pin 1 4 Replace the Q203 Replace the D208 D209 D210 D211 Check or Replace the D208 D209 D210 D211 Check or Replace the D203 D205 Check the High of Q202 B Check the High of Q208 Replace the Q207 Replace the Transformer Replace the Transformer Check the High of CN203...

Page 14: ... of the IC601 Pin9 Replace the TR YES YES NO NO Audio abnormal Check the output of IC301 Pin8 12 Check the connecting to SPEAKER Check the High of IC301 pin5 Check the input terminal of Function OK Check the input of IC301 Pin2 4 Check the DC10V of IC201 pin24 Check the DC 12V Output of IC204 Check the power YES YES YES YES NO NO NO NO ...

Page 15: ...r to IC100 Troubleshooting AUX Chekc the signal input of IC201 pin 2 5 Check the signal input of JK201 Check the signal input of IC201 pin 7 28 Check the signal of PN201 pin 6 8 or Refer to CD Troubleshooting Check the signal input of IC201 pin 1 6 Refer to IC1 Troubleshooting CD Tuner ...

Page 16: ...r to Power Circuit Troubleshooting Check the Data of IC601 Pin 3 4 CD TAPE FUNCTION Replace the IC201 Check the pattern of IC601 IC201 Check the P SENS High of IC601 pin 26 Check the oscillation of X602 When power supplying to IC601 pin11 Low High Replace the IC601 Check the power supplying to IC201 pin24 Check the CLK Data of IC201 pin 21 22 Check the CONTROLL function END YES YES YES YES YES YES...

Page 17: ... of IC2 Pin 7 Refer to IC2 Troubleshooting Replace the Q2 Replace the TUN1 Replace the TUN1 YES YES YES YES YES NO NO IC1 Troubleshooting Check the power supplying to pin8 Check the waveform of Pin 20 21 Check the waveform output of Pin 16 17 END Refer to Power Circuit Troubleshooting Check the FM TUN1 AM L2 Replace the IC1 Replace the IC2 Check the Low of Pin 13 Refer to IC2 Troubleshooting YES Y...

Page 18: ... Output to u com CLK Tuner mode clock Replace the IC2 YES YES YES YES NO NO NO NO AM COIL Troubleshooting Check the High of L2 Pin 2 Refer to IC2 Troubleshooting Replace the L2 Check the oscillation of L2 Pin 13 Refer to IC1 Troubleshooting YES YES NO NO Play Check the VCC supplying to IC100 pin 4 Refer to Power Circuit Troubleshooting Check the Deck Mecha Replace the Deck Mecha Replace the IC100 ...

Page 19: ...upplying to C138 Check the oscillation of Q103 E Check the 0 6V of Q103 B END Check the Vcc power of IC101 Pin6 Check the oscillation of L100 pin 1 3 Replace the DECK Check the Low of Q109 Q159 B Replace the Q109 Q159 Refer to IC101 Troubleshooting Refer to Power Circuit Troubleshooting Check the 1 0V of R130 Check the L100 YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO ...

Page 20: ... 2 14 MEMO ...

Page 21: ...2 15 2 16 BLOCK DIAGRAM ...

Page 22: ...8 NOTE 1 Shaded parts are critical for safety Replace only with specified part number 2 Voltages are DC measured with a digital voltmefer during Play mode NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock ...

Page 23: ...2 19 2 20 TUNER DECK SCHEMATIC DIAGRAM ...

Page 24: ... FRONT SCHEMATIC DIAGRAM 2 21 2 22 ...

Page 25: ... CDP SCHEMATIC DIAGRAM 2 23 2 24 ...

Page 26: ...WIRING DIAGRAM 2 25 2 26 NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock ...

Page 27: ...PRINTED CIRCUIT DIAGRAMS MAIN TUNER P C BOARD SOLDER SIDE 2 27 2 28 ...

Page 28: ... MAIN TUNER P C BOARD COMPONENT SIDE 2 29 2 30 ...

Page 29: ... FRONT POWER P C BOARD SOLDER SIDE 2 31 2 32 ...

Page 30: ... FRONT POWER P C BOARD COMPONENT SIDE 2 33 2 34 ...

Page 31: ... 2 35 CD MAIN P C BOARD SOLDER SIDE ...

Page 32: ... 2 36 CD MAIN P C BOARD COMPONENT SIDE ...

Page 33: ... 2 37 INTERNAL BLOCK DIAGRAM OF ICs BU1923 BU1923F RDS RBDS decoder ...

Page 34: ... 2 38 BA3308 Dual preamplifier with ALC KA78R33 Low Dropout Voltage Regulator ...

Page 35: ...L Frequency Synthesizer B01 B02 B03 B04 I01 I02 XIN PD AIN AOUT IFIN XOUT FMIN AMIN CE DI CL D0 VDD VSS REFERENCE DIVIDER PHASE DETECTOR CHARGE PUMP UNLOCK DETECTOR UNIVERSAL COUNTER DATA SHIFT REGISTER LATCH 12bits PROGRAMMABLE DIVIDER SWALLOW COUNTER 1 16 1 17 4bits POWER ON RESET CCB I F 1 2 ...

Page 36: ...3 0 30dB 2dB STEP MUXOUTL VOLUME TREBLE I CBUS DECODER LATCHES BASS SPKR ATT LEFT VOLUME TREBLE BASS SUPPLY VREF SPKR ATT RIGHT INL TREBLE L BOUT L BIN L 1 28 L IN2 L IN3 L IN4 R IN1 R IN2 R IN3 R IN4 2 L_IN3 L_IN4 MUXOUTL IN L MUXOUT R BIN R IN R BOUT R BIN L 1 3 2 4 5 6 7 8 9 BOUT L N C N C TREBLE R TREBLE L SCL SDA DIG GND CREF 23 22 21 20 19 17 18 16 15 D98AU884 10 11 12 13 14 28 27 26 25 24 R...

Page 37: ... Output 19 DO3 CH3 Drive Output 6 REO Regulator Feedback Input 20 IN3 CH3 Drive Input 7 RESX Regulator Reset 21 VCC1 Supply Voltage1 CH2 CH3 CH5 8 GND1 Signal Ground 22 PS Power Save 9 CTL CH5 Motor Speed Control 23 VREF Bias Voltage 10 FWD CH5 Forward Input 24 VCC Supply Voltage CH1 CH4 11 REV CH5 Reverse Input 25 IN4 CH4 Drive Input 12 IN2 CH2 Drive Input 26 DO4 CH4 Drive Output 13 DO2 CH2 Drive...

Page 38: ... 2 42 KIA6225P S BIPOLAR LINEAR INTEGRATED CIRCUIT ...

Page 39: ...BINET AND MAIN FRAME SECTION A43 263 A46 290 262 266 287 301 351 A47 265 281 275 274 A41 A00 276 286 284 278 277 260 250 272 302 303 305 A26 NOTE Refer to SECTION 5 REPLACEMENT PARTS LIST in order to look for the part number of each part ...

Page 40: ...RTS A 15 V WOOD UNIT CS 21 SERIES 014 6768R GV01B DECK MECHANISM PARTS A 07 3 V WOOD GEAR CS 21 SERIE 018 6768R GV01A DECK MECHANISM PARTS A 06 V WOOD GEAR CS 21 SERIES 022 6768R UV01A DECK MECHANISM PARTS A 01A V WOOD UNIT CS 21 SERIES 026 6768R UV01B DECK MECHANISM PARTS A 12 V WOOD UNIT CS 21 SERIES 028 6768R AV01A DECK MECHANISM PARTS A 09 V WOOD ARM CS 21 SERIES R 032 6768R QV01A DECK MECHANI...

Page 41: ...ASSEMBLY FE 165E PILOT 852 3720RMF034A PANEL FRONT FE 165E STANDARD WHITE PEARL 854 6400FTTE01A SPEAKER FULLRANGE F40C D300 TOPTONE FULL RANGE H 855 4766RM0014A FELT FE 195E BLACK WOOFER 856 3091RMW035A CABINET ASSEMBLY FE 165E CABINET ASSY PB 9T 857 6852SCK004A CORD FE M100E 0 16 18 2C CORD 859 353M050C SCREW BH 3 5X16 FBK RUN DATE 11 SEPTEMBER 2002 ...

Page 42: ... 4 2 MEMO ...

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