LG FFH-M217X Service Manual
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LG FFH-M217X Service Manual

LG FFH-M217X Service Manual

Mp3 cd micro system
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MP3 CD
MICRO SYSTEM
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SUMMARY" IN THIS MANUAL.
MODEL: FFH-M217X, FE-M217E

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Summary of Contents for LG FFH-M217X

  • Page 1 MP3 CD MICRO SYSTEM SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE “SUMMARY” IN THIS MANUAL. MODEL: FFH-M217X, FE-M217E...
  • Page 2 [CONTENTS] ❍ SECTION 1. GENERAL • SERVICING PRECAUTIONS ..................... 1-2 • ESD PRECAUTIONS ......................... 1-4 • SPECIFICATION ........................1-5 ❍ SECTION 2. ELECTRICAL SECTION • ADJUSTMENTS ......................... 2-1 • TROUBLESHOOTING ....................... 2-2 • WAVEFORMS OF MAJOR CHECK POINT ................2-18 •...

  • Page 3: 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 4: Notes Regarding Compact Disc Player Repairs

    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 5: 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 6: Specifications

    ❏ SPECIFICATIONS General Power supply Refer to the back panel of the unit Power consumption Mass 4.2kg Extemal dimensions(W 275mm Frequency Response 40 -18000Hz Signal-to-noise ratio 70dB Dynamic range 70dB Tuning Range 87.5 -108.0MHz or 65 ~ 74MHz, 87.5 ~108.0 MHz Intermediate Frequency 10.7 MHz Signal-to-noise ratio...
  • Page 7 - 1-6 -...

  • Page 8: Section 2. Electrical Section

    SECTION 2. ELECTRICAL SECTION ❏ 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 9: Troubleshooting

    ❏ TROUBLESHOOTING • AUDIO PART P-SENS PART Does +5V appear at ZD901? Check the waveform of D937 (+). Replace the D937 Check the pattern of IC301 pin Replace ZD901. VKK PART Does DC - 33V appear at PN301 pin Check the DC -35V of C928(-) Replace the D936 Check the DC -33V of ZD 902(-)

  • Page 10: Power Circuit

    POWER CIRCUIT Check the Fuse Replace the Fuse CHECK THE AC VOLTAGE Check the DC output Replace the Transformer OF CN901 pin1, 4 of C921(+) Replace the D921, D922, D923, D924 Check the DC 12V Output of IC901 Replace the IC902 Check the DC 6.2V output of IC902 Check DC VOLTAGE OF...

  • Page 11: Muting Circuit (Mute)

    MUTING CIRCUIT (MUTE) Dose “High” appear at Q701, Q751“B” Check the “High” of PN601 pin4 Check the “High” of the IC301 pin12 Refer to IC 301 check the “Low” of Q701, Troubleshooting Q751, “C” Replace the Q703 MUTE Replace the TR AUDIO ABNORMAL Check the signal output of IC701 pin2, 4...

  • Page 12: Function Mode Audio Abnormal

    FUNCTION MODE AUDIO ABNORMAL TAPE Check the signal input of IC601 pin6, 23 Refer to “IC201 Troubleshooting” Chekc the signal input of IC601, pin5, 24 Check the signal input of JK601 Check the signal input of IC601 pin3, 26 Check the signal input of PN603 pin6, 8 TUNER Check the signal input of IC601 pin4, 25 Refer to “TUNER PACK Troubleshooting”...
  • Page 13 IC301 TROUBLESHOOTING Check the power supplying IC301 pin31,32,51,88? Refer to “Power Circuit Troubleshooting” Check the P-SENS “High” of IC301 pin6 Check the P-SENS Check the oscillation of X301 Replace the X301 When power supplying to IC301 pin92. (Low © High) Check the RESET circuit Replace the IC301 IC601 TROUBLESHOOTING...
  • Page 14 TUNER PACK TROUBLESHOOTING Check the PLL- of CE, DI, DO, CLK CE: Chip Enable DI: Data Input(from u-com) DO: Data Output(to u-com) CLK: Tuner mode clock Is the normal ? Replace the TUNER PACK TUNER PACK POWER TROUBLESHOOTING Check the +9V of TU601 pin2 Check the +DC C670 Refer to “Power circuit Check the GND of TU601 pin4, 10...
  • Page 15 REC (Q252, Q202 ON / R273, R223 HIGH) Check signal supplied to IC203 pin2, 8 ? Check the “Low” of Q202, Q252 “B” Check the “Low” of PN601 pin14 Replace the Q202, Q252 Check the output of IC203 pin3, 7 Check the Vcc power of IC203 Pin6 Check the “voltage”...
  • Page 16 • CD PART TURN ON CD OPEN CLOSE CHECK CONNECTOR CHECK ( PN508,PN507) CHECK POWER SUPPLY CIRCUIT( PN508) CHECK MICOM INTERFACE CIRCUIT( PN507) “ READING ” DISPLAY CHECK CONNECTOR CHECK ( PN508,PN507,PN503,PN501) CHECK MICOM INTERFACE CIRCUIT( PN507) READING OK CHECK CONNECTOR CHECK(PN501,PN503) CHECK PICKUP MOVEMENT CHECK BA5810FP (IC503)

  • Page 17: Open Close Ng

    OPEN CLOSE NG CONNECTOR LOCKING CHECK ( PN508,PN507) CHECK POWER SUPPLY CIRCUIT( PN508 ,PN507) DEFECTIVE MAIN PN 508 PIN 8 = 6.2V, PIN 7 = 5V POEWR SUPPLY PN507 PIN 1 = 5V DEFECTIVE MICOM CHECK VOLTAGE CHANGE OF AD 5V, CLOSE , AND BTLMUTE VOLTAGE(= 5V) (PN507 PIN 1:5V, 2:CLOSE, 3:BTLMUTE) DEFECTIVE...

  • Page 18: " Reading " Display Check (= Only "Cd "Display)

    “ READING ” DISPLAY CHECK (= ONLY “CD “DISPLAY) CONNECTOR LOCKING CHECK (PN508,PN507,PN503,PN501 ) CHECK POWER SUPPLY DEFECTIVE CONNECTOR OR PORT( PN508 ,PN507) MAIN POWER SUPPLAY PN508 PIN 8 = 6.2V, PIN 7 = 5V PN507 PIN 1 = 5V CHECK VOLTAGE THE PIN 2 OF IC505 DEFECTIVE IC505 IC505 PIN2 : 3.3V...
  • Page 19 READING OK CHECK (= “NO DISC” DISPLAY) CONNECTOR LOCKING CHECK(PN501,PN503) DOES SLED MOVE ? CHECK PN503 PIN 3,4( SL+,SL-) DEFECTIVE PICKUP OR IC503 OR IC501 OR IC502 DOES LENSE MOVE ? (= UP & DOWN) DEFECTIVE PICKUP OR CHECK PN501 PIN 13,16 IC503 OR IC501 ( FA-, FA+) DOES LASER LIGHT ?
  • Page 20 READING OK CHECK #A (= “NO DISC” DISPLAY) DOES SL+ WAVEFORM APPEAR ( IC503 PIN14 AND PN503 PIN3) WAVEFORM #2 SLED MOTOR WAVE DOES SLIN WAVEFORM APPEAR AT DEFECTIVE IC501 ( IC503 PIN 5) WAVEFORM #2 SLED DRIVE WAVE DEFECTIVE IC503 DEFECTIVE PN503 CHECK PN503 CONNECTOR LINE CONNECTOR...
  • Page 21 READING OK CHECK #B (= “NO DISC” DISPLAY) DOES FA+ WAVEFORM APPEAR ( IC503 PIN15 AND PN501 PIN16) WAVEFORM #3 FOCUS COIL DRIVE WAVE DOES FAIN- WAVEFORM APPEAR AT DEFECTIVE IC501 ( IC503 PIN 26) WAVEFORM #3 FOCUS DRIVE WAVE DEFECTIVE IC503 DEFECTIVE PN501 CHECK PN501 CONNECTOR LINE...
  • Page 22 READING OK CHECK #C (= “NO DISC” DISPLAY) IS ?V APPLIED TO PIN10 OF PN501 LASER SUPPLY VOLTAGE CHECK IS 3.3 V APPLIED TO PIN3 OF IC502 RF IC SUPPLY VOLTAGE DEFECTIVE IC505 CHECK IS 2.0 V PIN2 OF IC502 DEFECTIVE IC502 LASER CONTROL VOLTAGE CHECK...
  • Page 23 READING OK CHECK #D (= “NO DISC” DISPLAY) DOES SP+ WAVEFORM APPEAR ( IC503 PIN12 AND PN503 PIN6) WAVEFORM #4 SPINDLE MOTOR DRIVE WAVE DOES SPIN WAVEFORM APPEAR AT DEFECTIVE IC501 ( IC503 PIN 6) WAVEFORM #4 SPINDLE DRIVE WAVE DEFECTIVE IC503 DEFECTIVE PN503 CHECK PN802 CONNECTOR LINE...
  • Page 24 READING OK CHECK #E (= “NO DISC” DISPLAY) DOES TA+ WAVEFORM APPEAR ( IC503 PIN17 AND PN503 PIN15) WAVEFORM #5 TRACKING COIL DRIVE WAVE DOES TAIN- WAVEFORM APPEAR AT DEFECTIVE IC501 ( IC503 PIN 23) WAVEFORM #5 TRACKING DRIVE WAVE DEFECTIVE IC503 DEFECTIVE PN503 CHECK PN503 CONNECTOR LINE...

  • Page 25: Micom Interface Waveform

    ❏ WAVEFORMS OF MAKOR CHECK POINT #1.MICOM INTERFACE WAVEFORM #2.SLED DRIVE AND MOTOR WAVEFORM (PN507 pin6,8,9,10)during normal play (IC503 pin5,14)when focus search IC503:SLIN PN507:STAT PN507:MDATA IC503:SL+ PN507:MCLK PN507:MLD #3.FOCUS DRIVE AND MOTOR WAVEFORM (TP561,IC503 pin15) • When focus search failed or there is no disc on tray •...

  • Page 26: Spindle Drive And Motor Waveform

    #4.SPINDLE DRIVE AND MOTOR WAVEFORM #5.TRACK DRIVE AND MOTOR WAVEFORM (IC503 pin6,12) when TOC reading (TP560,IC503 pin23)during normal play TP 560 IC503:SPIN IC503:TA+ IC503:SP+ #6.RF,TRACKING AND FOCUS ERROR WAVEFORM (IC802 pin8,21,23)during normal play IC502:ARF IC502:TE IC502:FE - 2-19 -...

  • Page 27: Internal Block Diagram Of Ics

    ❏ INTERNAL BLOCK DIAGRAM OF ICs I KIA6225P/S (IC201) • BIPOLAR LINEAR INTEGRATED CIRCUIT - 2-20 -...

  • Page 28: Internal Circuit Configuration

    I BA3126N (IC202) 2-CHANNEL HEAD SWITCH FOR RADIO CASSETTE RECOREDERS • INTERNAL CIRCUIT CONFIGURATION I BA3308 (IC203) DUAL PREAMPLIFIER WITH ALC - 2-21 -...

  • Page 29: Internal Block Diagram

    I MN6627933CG (IC501) • INTERNAL BLOCK DIAGRAM I BU2090F (IC501) • -12 -BIT, SERIAL IN, PARALLEL OUT DRIVER Control circuit DATA 12-bit shift register CLOCK Latch Output buffer (open drain) - 2-22 -...

  • Page 30: Pin Configuration

    I AM5810 (IC503) CH1~CH4 MUTE POWVCC34 (CH3,CH4) 7.5K LEVEL 7.5K SHIFT LEVEL SHIFT 7.5K LEVEL LOADING PRE SHIFT FWD REV LEVEL 7.5K SHIFT PREVCC POWVCC12 POWER (PRE,LOADING) (CH1,CH2) SAVE • PIN CONFIGURATION BIAS OPIN 4 (+) LDCONT OPIN 4 (-) OPOUT 4 IN 1 OPIN3 (+)
  • Page 31 I TDA7265 (IC701) 25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY • DESCRIPTION The TDA7265 is class AB dual Audio power am-plifier assembled in the Multiwatt package, spe-cially designed for high quality sound application as Hi-Fi music centers and stereo TV sets. •...

  • Page 32: Block Diagram

    ❏ BLOCK DIAGRAM 2-25 2-26...

  • Page 33: Main Schematic Diagram

    ❏ SCHEMATIC DIAGRAMS NOTE: NOTE: Warning • MAIN SCHEMATIC DIAGRAM Shaded(I) parts are critical for safety.Replace Parts that are shaded are critical With respect to risk of fire or electrical shock. only with specified part number. 2. Voltages are DC-measured with a digital voltmefer during Play mode.

  • Page 34: Front Schematic Diagram

    NOTE: NOTE: Warning 1. Shaded(I) parts are critical for safety.Replace Parts that are shaded are critical With • FRONT SCHEMATIC DIAGRAM only with specified part number. respect to risk of fire or electrical shock. 2. Voltages are DC-measured with a digital voltmefer during Play mode.

  • Page 35: Wiring Diagram

    ❏ WIRING DIAGRAM 2-31 2-32...

  • Page 36: Printed Circuit Diagrams

    ❏ PRINTED CIRCUIT DIAGRAMS • MAIN P.C. BOARD 2-33 2-34...
  • Page 37 • FRONT/POWER P.C. BOARD (COMPONENT SIDE) 2-35 2-36...
  • Page 38 • CDP P.C. BOARD (SOLDER SIDE) 2-37 2-38...
  • Page 39 • CDP P.C. BOARD (COMPONENT SIDE) 2-39 2-40...

  • Page 40: Section 3. Exploded Views

    SECTION 3. EXPLODED VIEWS ❏ CABINET AND MAIN FRAME SECTION NOTE) Refer to “SECTION 5 REPLACEMENT PARTS LIST” in order to look for the part number of each part.
  • Page 41 • TAPE DECK MECHANISM: SINGLE AUTO REVERSE DECK LOCA. NO PART NO. DESCRIPTION SPECIFICATION 6720AF0002E DECK,AUDIO CRM4212 TOKYO PIGEON L-SINGLE 6768R-UP03A DECK MECHANISM PARTS 50-093-4941 PIGEON PWB ASSY UN 6768R-BP03A DECK MECHANISM PARTS 02-083-4252 PIGEON BELT/FELT C 6768R-PP03A DECK MECHANISM PARTS 33-160-4309 PIGEON PRESS CASSE 6768R-QP03A DECK MECHANISM PARTS...

  • Page 42: Section 4. Speaker Section

    SECTION 4. SPEAKER SECTION ❏ MODEL: FE-M217E - 4-1 -...
  • Page 43 - 4-2 -...

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Fe-m217e

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