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LG FFH-164 Manual
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LG FFH-164 Manual

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CONTENTS
•SERVICING PRECAUTIONS ....................................................................................................................... 1-2
• ESD PRECAUTIONS ................................................................................................................................... 1-4
• SPECIFICATIONS ....................................................................................................................................... 1-5
• ADJUSTMENTS ........................................................................................................................................... 2-1
• TROUBLESHOOTING ................................................................................................................................. 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
• 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
- 1-1 -

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Summary of Contents for LG FFH-164

  • Page 1: Table Of Contents

    CONTENTS SECTION 1. GENERAL •SERVICING PRECAUTIONS ........................1-2 • ESD PRECAUTIONS ........................... 1-4 • SPECIFICATIONS ............................1-5 SECTION 2. ELECTRICAL • ADJUSTMENTS ............................2-1 • TROUBLESHOOTING ..........................2-3 • WAVEFORMS OF MAJOR CHECK POINT ....................2-6 • BLOCK DIAGRAM ............................. 2-15 •...

  • Page 2: Section 1. General

    SECTION 1. GENERAL SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.
  • Page 3 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

  • Page 4: Esd Precautions

    ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

  • Page 5: Specifications

    SPECIFICATIONS SECTION MODEL FFH-164, 165 General Power supply Refer to the back panel of the unit Power consumption Mass 3.44kg Extemal dimensions(W 271mm Frequency Response 40-18000Hz Signal-to-noise ratio 60dB Dynamic range 60dB Tuning Range 87.5-108.0MHz or 65-74MHz, 87.5-108.0MHz Intermediate Frequency 10.7 MHz...
  • Page 6 MEMO - 1-6 -...

  • Page 7: Section 2. Electrical

    SECTION 2. ELECTRICAL ADJUSTMENTS This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers with the adjustment, realignment may be necessary.

  • Page 8: Troubleshooting

    TROUBLESHOOTING Turn power on. Check power supply circuit. PN508 PIN 8, 6.2V Is power on? PN508 PIN 7, 5V IC503 PIN 2, 3.3V Check the connector Check the DISK turns Does initial read work? PN502, PN503, PN507 Check the Laser Check the focus circuit Check the TRAKING circuit Does it play?
  • Page 9 Fails to initial read Check the Voltage change of PN 507 Defective connector Disc motor turns pin2(OPEN, CLOSE) PN507 Does RF waveform appear? Check the Data transmission from Defective connector IC501 Pin3 PN507 pin8 to CD DSP PN507 Defective MICOM Check the Data transmission from Defective connector PN507 pin6 to MICOM...
  • Page 10 Laser does not light. Is “3.5V” applied to pin of IC 501? Did pickup return to Is data transferred from Defective MICOM. innermost circular? MICOM IC ? Does voltage appear at IC 502 pin Defective IC 501, 502 Defective slide motor and/or connector.
  • Page 11 Laser lights Does lens move up/down? Defective IC501 Check the signal of FOCUS SEARCH (IC501 Pin 21) Defective IC502 Chekc the signal of PN502 pin 13, 14 Open activator and/or connector Does FE signal appear? (IC501 pin 13) Defective IC501 Degraded laser diode Does DRF signal appear? (IC 501 pin67) Defective PICK-UP...

  • Page 12: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. HF signal (RF signal ) waveform 2. EFM signal (IC501 pin 3)waveform (IC501 pin 3) during normal play during Normal Play 0.5V/Div. 0.5V/Div. 500nS/Div. 5µS/Div. 3. Focus coil drive waveform(IC502 pin13) • Focus coil drive waveform(FDO: IC501 pin21) and •...
  • Page 13 P-SENS PART Does +5V appear at ZD205(+)? Check the waveform of D212 (+). Replace the D212 Check the pattern of Check the and IC601 Pin replace ZD205. Power Circuit Check the Fuse Replace the Fuse Check the DC output Check the AC output of H202 pin 1, 4 Replace the Transformer of C299(+) Replace the D208, D209,...
  • Page 14 Muting circuit (MUTE) Dose “High” appear at Q301, Q351“B” Check the “High” of CN203 PIN 12 Check the “High” of the IC601 Pin9 check the “Low” of Q301, Q351 “C” Replace the TR. MUTE Audio abnormal Check the output of IC301 Pin8, 12 Check the connecting to SPEAKER...
  • Page 15 FUNCTION MODE Audio abnormal TAPE Check the signal input of IC201 pin 3, 24 Refer to “IC100 Troubleshooting” 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”...
  • Page 16 IC601 Troubleshooting Check the power supplying IC601 Pin 17, 54, 80, 90? Refer to “Power Circuit Troubleshooting” Check the P-SENS “High” of IC601 pin 26 Check the P-SENS Check the oscillation of X602 Replace the X602 When power supplying to IC601 pin11. (Low ➞...
  • Page 17 FM (TUN1) Check the +12V input of TUN1 B+ 6 Check the 12V of Q2 “E” Refer to “Power Circuit Trouble- shooting” Check the “LOW” of IC2 Pin 7 Check the “High” Voltage of TUN1 VT 5 Refer to “IC2 Troubleshooting”...
  • Page 18 IC2 Troubleshooting Check the power supplying to pin 17 Refer to “Power Circuit Troubleshooting” Check the oscillation of X1 Replace the X1 Check the line or refer to “IC2 Check the clock of CE, DI, DO, CLK Troubleshooting” CE: Chip Enable DI: Data Input(from u-com) DO: Data Output(to u-com) Is the normal ?
  • Page 19 Check signal supplied to IC101 pin 2, 8 ? Check the “Low” of Q109, Q159 “B” Refer to “IC101 Troubleshooting” Replace the Q109, Q159 Check the output of IC101 Pin3, 7 Check the Vcc power of IC101 Pin6 Check the “High” of IC101 pin 6 Check the power or Refer to “IC101 Troubleshooting”...
  • Page 20 MEMO - 2-14 -...

  • Page 21: Block Diagram

    BLOCK DIAGRAM 2-15 2-16...

  • Page 22: Schematic Diagrams

    SCHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAM NOTE: Warning NOTE: Shaded(■) parts are critical for safety.Replace only Parts that are shaded are critical With respect to risk of fire or electrical shock. with specified part number. 2. Voltages are DC-measured with a digital voltmefer during Play mode.
  • Page 23 TUNER/DECK SCHEMATIC DIAGRAM 2-19 2-20...
  • Page 24 • FRONT SCHEMATIC DIAGRAM 2-21 2-22...
  • Page 25 • CDP SCHEMATIC DIAGRAM 2-23 2-24...

  • Page 26: Wiring Diagram

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

  • Page 27: Printed Circuit Diargams

    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 • CD MAIN P.C. BOARD (SOLDER SIDE) - 2-35 -...
  • Page 32 • CD MAIN P.C. BOARD (COMPONENT SIDE) - 2-36 -...

  • Page 33: Internal Block Diagram Of Ics

    INTERNAL BLOCK DIAGRAM OF ICs ■ BU1923/BU1923F RDS/RBDS decoder - 2-37 -...
  • Page 34 ■ BA3308 Dual preamplifier with ALC ■ KA78R33 Low Dropout Voltage Regulator - 2-38 -...
  • Page 35 ■ LA1837 Single-Chip Home Stereo IC with Electronic Tuning Support ■ LC72131, 72131M AM/FM PLL Frequency Synthesizer PHASE DETECTOR REFERENCE DIVIDER CHARGE PUMP XOUT SWALLOW COUNTER UNLOCK FMIN AOUT 1/16. 1/17 4bits DETECTOR 12bits PROGRAMMABLE AMIN DIVIDER DATA SHIFT REGISTER UNIVERSAL IFIN LATCH...
  • Page 36 ■ TDA7440D DIGITALLY CONTROLLED AUDIO PROCESSOR MUXOUTL TREBLE(L) BIN(L) BOUT(L) L-IN1 100K L-IN2 100K SPKR ATT VOLUME TREBLE BASS LOUT LEFT L-IN3 100K L-IN4 100K 0/30dB I CBUS DECODER + LATCHES 2dB STEP R-IN1 DIG_GND 100K R-IN2 100K SPKR ATT VOLUME TREBLE BASS...
  • Page 37 ■ FAN8039BD3 5-CH Motor Driver • PIN Definitions Symbol Description Symbol Description DO1- CH1 Drive Output (-) GND2 Power Ground1 (CH 2,3,5) DO1+ CH1 Drive Output (+) DO5+ CH5 Drive Output (+) CH1 Drive Input DO5- CH5 Drive Output(-) REGVCC Regulator Supply Voltage DO3- CH3 Drive Output(-)
  • Page 38 ■ KIA6225P/S BIPOLAR LINEAR INTEGRATED CIRCUIT - 2-42 -...

  • Page 39: Section 3. Exploded Views

    SECTION 3. EXPLODED VIEWS NOTE) Refer to “SECTION 5 REPLACEMENT PARTS LIST” in order to look for the • CABINET AND MAIN FRAME SECTION part number of each part.

  • Page 40: Tape Deck Mechanism: Auto Stop Deck

    • TAPE DECK MECHANISM: AUTO STOP DECK LOCA.NO. PART NO DESCRIPTION SPECIFICATION 6768R-HV01C DECK MECHANISM PARTS AP-4211(P.C.B) V/WOOD HEAD CS- 6768R-EV01A DECK MECHANISM PARTS A-13 V/WOOD HEAD ASSY CS-21 SE 6768R-RV01A DECK MECHANISM PARTS A-04 V/WOOD ROLLER CS-21 SERIE 6768R-UV01D DECK MECHANISM PARTS A-15 V/WOOD UNIT CS-21 SERIES 6768R-GV01B...

  • Page 41: Section 4. Speaker

    SECTION 4. SPEAKER SECTION MODEL: FE-164E FE-165E RUN DATE : 11.SEPTEMBER.2002 LOCA.NO. PART NO. DESCRIPTON SPECIFICATION REMARKS 3701RM0026A NET ASSEMBLY FE-165E ,(PILOT) 3720RMF034A PANEL,FRONT FE-165E STANDARD (WHITE PEARL) 6400FTTE01A SPEAKER,FULLRANGE F40C-D300 TOPTONE FULL-RANGE(H 4766RM0014A FELT FE-195E BLACK WOOFER 3091RMW035A CABINET ASSEMBLY FE-165E CABINET ASSY PB 9T 6852SCK004A CORD...
  • Page 42 MEMO - 4-2 -...

This manual is also suitable for:

Ffh-165

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