LG LX-M230A Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Stereo System
  5. LX-M230A
  6. Manual
LG LX-M230A Manual

LG LX-M230A Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

❍ 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 ............................................................................. 2-11
• BLOCK DIAGRAM .................................................................................................................... 2-21
• SCHEMATIC DIAGRAMS ........................................................................................................ 2-23
• WIREING DIAGRAM ................................................................................................................ 2-29
• PRINTED CIRCUIT DIAGRAMS .............................................................................................. 2-31
• INTERNAL BLOCK DIAGRAM OF ICs .................................................................................... 2-38
❍ SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION .................................................................................. 3-1
• TAPE DECK MECHANISM: AUTO REVERSE DECK ................................................................ 3-3
• TAPE DECK MECHANISM: AUTO STOP DECK (OPTIONAL) .................................................. 3-5
• CD MECHANISM ........................................................................................................................ 3-7
❍ SECTION 4. SPEAKER PART
• SPEAKER PART ........................................................................................................................ 4-1
❍ SECTION 5. REPLACEMENT PARTS LIST
• REPLACEMENT PARTS LIST .................................................................................................... 5-1
[CONTENTS]
- 1-1 -

Advertisement

Table of Contents
loading

Related Manuals for LG LX-M230A

Summary of Contents for LG LX-M230A

  • Page 1 [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 ................2-11 •...

  • 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

    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 LX-M230A General Power supply Refer to the back panel of the unit Power consumption Mass 4.35kg Extemal dimensions(W 268mm Frequency Response 40 -18000Hz Signal-to-noise ratio 70dB Dynamic range 70dB Tuning Range 87.5 -108.0MHz Intermediate Frequency 10.7 MHz...
  • Page 6 - 1-6 -...

  • Page 7: 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 8: Troubleshooting

    ❏ TROUBLESHOOTING • 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...

  • Page 9: Open Close Ng

    • OPEN CLOSE NG CONNECTOR LOCKING CHECK ( PN508,PN507 ) CHECK POWER SUPPLY CIRCUIT( PN508 DEFECTIVE MAIN ,PN507) PN 508 PIN 8 = 6.2V, PIN 7 = 5V POEWR SUPPLY PN507 PIN 1 = 5V DEFECTIVE MICOM CHECK VOLTAGE CHANGE OF OPEN CLOSE, AND BTLMUTE VOLTAGE(= 5V) (PN507 PIN 12:OPEN, 13:CLOSE, 14:BTLMUTE) CHECK VOLTAGE CHANGE LO+, LO- OF IC503...

  • Page 10: " 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 DEFECTIVE IC505 IC505 PIN2 : 3.3V...
  • Page 11 • READING OK CHECK (= “NO DISC” DISPLAY) CONNECTOR LOCKING CHECK(PN501,PN503) DOES SLED MOVE ? A A A A CHECK PN503 PIN 3,4( SL+,SL-) DEFECTIVE PICKUP OR IC503 OR IC501 OR IC502 DOES LENSE MOVE ? (= UP & DOWN) B B B B DEFECTIVE PICKUP OR CHECK PN501 PIN 13,16...
  • Page 12 • READING OK CHECK #A (= “NO DISC” DISPLAY) A A A A DOES SL+ WAVEFORM APPEAR AT ( IC503 PIN14 AND PN503 PIN3) WAVEFORM #2 SLED MOTOR WAVE DOES SLIN WAVEFORM APPEAR AT ( IC503 PIN 5) DEFECTIVE IC501 WAVEFORM #2 SLED DRIVE WAVE DEFECTIVE IC503...
  • Page 13 • READING OK CHECK #B (= “NO DISC” DISPLAY) B B B B DOES FA+ WAVEFORM APPEAR AT ( IC503 PIN15 AND PN501 PIN16) WAVEFORM #3 FOCUS COIL DRIVE WAVE DOES FAIN- WAVEFORM APPEAR AT ( IC503 PIN 26) DEFECTIVE IC501 WAVEFORM #3 FOCUS DRIVE WAVE DEFECTIVE IC503...
  • Page 14 • READING OK CHECK #C (= “NO DISC” DISPLAY) C C C C 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 15 • READING OK CHECK #D (= “NO DISC” DISPLAY) D D D D DOES SP+ WAVEFORM APPEAR AT ( 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...
  • Page 16 • READING OK CHECK #E (= “NO DISC” DISPLAY) E E E E DOES TA+ WAVEFORM APPEAR AT ( 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...

  • Page 17: Micom Interface Waveform

    ❏ WAVEFORMS OF MAKOR CHECK POINT #1 . MICOM INTERFACE WAVEFORM #2. SLED DRIVE AND MOTOR WAVEFORM (PN507 pin6, 8, 9, 1 0) during normal play (IC503 pin5, 1 4) when focus search #3. FOCUS DRIVE AND MOTOR WAVEFORM (TP56 1 , IC503 pin 1 5) - When focus search failed or there is no - There is disc on tray and focus search disc on tray...

  • Page 18: Spindle Drive And Motor Waveform

    #4. SPINDLE DRIVE AND MOTOR WAVEFORM #5. TRACK DRIVE AND MOTOR WAVEFORM (IC503 pin6, 1 2) when TOC reading (TP560, IC503 pin23) during normal play #6. RF, TRACKING AND FOCUS ERROR WAVEFORM (IC502 pin8, 2 1 , 23) during normal play - 2-12 -...

  • Page 19: Audio Part

    ❏ 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 - 27V appear at PN601 pin Check the DC -34V of C928(-) Replace the D936 Check the DC -27V of ZD 902(-)

  • Page 20: Power Circuit

    POWER CIRCUIT Check the Fuse Replace the Fuse CHECK THE AC VOLTAGE Check the DC output Replace the Transformer OF CN901 pin5, 6 of C923(+) Replace the D925, D926, D927, D928 Check the DC 12V Output of IC901 Check the DC VOLTAGE of D939(+) Replace the D939 Replace the IC902...

  • Page 21: Muting Circuit (Mute)

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

  • Page 22: 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 CN603 pin6, 8 TUNER Check the signal input of IC601 pin4, 25 Refer to “TUNER PACK Troubleshooting”...
  • Page 23 IC301 TROUBLESHOOTING Check the power supplying IC301 pin17, 46, 72, 90? Refer to “Power Circuit Troubleshooting” Check the P-SENS “High” of IC301 pin26 Check the P-SENS Check the oscillation of X301 Replace the X301 When power supplying to IC301 pin12. (Low ©...
  • Page 24 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 OPN602 pin2 Check the +DC C670 Refer to “Power circuit Check the GND of PN602 pin4, 10...
  • Page 25 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 IC501 pin9 Replace the Q202, Q252 Check the output of IC203 pin3, 7 Check the Vcc power of IC203 Pin6 Check the “voltage”...
  • Page 26 - 2-20 -...
  • Page 27 • CD MAIN P.C. BOARD (SOLDER SIDE) - 2-37 -...

  • Page 28: Internal Block Diagram Of Ics

    ❏ INTERNAL BLOCK DIAGRAM OF ICs I KIA6225P/S (IC201) BIPOLAR LINEAR INTEGRATED CIRCUIT - 2-38 -...
  • Page 29 I BA3126N (IC202) 2-channel head switch for radio cassette recoreders • Internal circuit configuration I BA3308 (IC203) Dual preamplifier with ALC - 2-39 -...
  • Page 30 I MN6627933CG (IC501) Digital Servo Block Diagrams • Overview The focus servo circuit performs analog/digital conversion on FE(the focus error signal), while the tracking and sled servo circuits do so on TE(the tracking error signal), then they each pass that result through an equalizer, perform digital/analog conversion, and output it, At the spindle servo, based on the EFM signal during CLV control or the FG signal during CAV control, the calculated value passes through an equalizer, undergoes digital/analog conversion, and is output.
  • Page 31 I BA5810FP (IC503) - 2-41 -...
  • Page 32 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 33: Section 4. Speaker Section

    SECTION 4. SPEAKER SECTION MODEL: LXS-M230 RUN DATE : 01.JULY.2003 LOCA.NO. PART NO. DESCRIPTON SPECIFICATION REMARKS 3701RM0039A NET ASSEMBLY LXS-230, NET ASSY 3720RMF043A PANEL,FRONT FRONT LX-230, RESIN:L.GRAY, SP 6400SCSG03A SPEAKER,FULLRANGE CW-125B30L SAMMI 6-0 OHM 30 W 4766RM0012A FELT FE-196E BLACK WOOFER 4766RM0029A FELT 1.0T BLACK LXS-230, FOR DUCT...
  • Page 34 - 4-2 -...

  • Page 35: Block Diagram

    BLOCK DIAGRAM 2-21 2-22...

  • Page 36: Main Schematic Diagram

    SCHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAM NOTE: NOTE: Warning Shaded(I) parts are critical for safety.Replace only Parts that are shaded are critical With respect with specified part number. to risk of fire or electrical shock. 2. Voltages are DC-measured with a digital voltmefer during Play mode.
  • Page 37 FRONT/POWER SCHEMATIC DIAGRAM NOTE: NOTE: Warning 1. Shaded(I) parts are critical for safety.Replace only Parts that are shaded are critical With respect with specified part number. to risk of fire or electrical shock. 2. Voltages are DC-measured with a digital voltmefer during Play mode.
  • Page 38 • CDP SCHEMATIC DIAGRAM 2-27 2-28...

  • Page 39: Wiring Diagram

    WIRING DIAGRAM 2-29 2-30...

  • Page 40: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS • MAIN/TUNER P.C. BOARD(SOLDER SIDE) 2-31 2-32...
  • Page 41 • MAIN/TUNER P.C. BOARD(COMPONENT SIDE) 2-33 2-34...
  • Page 42 • FRONT/POWER P.C. BOARD (COMPONENT SIDE) • FRONT/POWER P.C. BOARD (SOLDER SIDE) NOTE: Warning NOTE: Warning Parts that are shaded are critical With respect Parts that are shaded are critical With respect to risk of fire or electrical shock. to risk of fire or electrical shock. 3-35 2-36...

  • Page 43: 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. TUNER...

  • Page 44: Tape Deck Mechanism: Auto Reverse Deck

    • TAPE DECK MECHANISM: AUTO REVERSE DECK LOCA. NO PART NO. SPECIFICATION 6730R-F001B CRL4428 PIGEON L-SINGLE A/REVERSE 6768R-UP01B 50-093-4329 PIGEON UNIT CRL442 6768R-BP01K 02-084-4200 PIGEON BELT/FELT C 6768R-AP01D 50-239-4027 PIGEON ARM CWL44 6768R-AP01E 50-239-4026 PIGEON ARM CWL44 6768R-SP01E 01-082-4654 PIGEON SPRING CWL4 6768R-QP01D 50-093-4328 PIGEON MOTOR(ASSY) 6768R-GP01A...

  • Page 45: Tape Deck Mechanism: Auto Stop Deck(Optional)

    • TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL) LOCA. NO PART NO. SPECIFICATION 6730R-F001A CFL4410 PIGEON L-SINGLE A/STOP 6768R-UP01C 50-093-4527 PIGEON UNIT CFL441 6768R-BP01L 02-084-4201 PIGEON BELT/FELT C 6768R-AP01D 50-239-4027 PIGEON ARM CWL44 6768R-AP01E 50-239-4026 PIGEON ARM CWL44 6768R-SP01E 01-082-4654 PIGEON SPRING CWL4 6768R-QP01D 50-093-4328 PIGEON MOTOR(ASSY) 6768R-GP01A...

  • Page 46: Cd Mechanism

    • CD MECHANISM LOCA.NO. PART NO DESCRIPTION SPECIFICATION 6721RJ0323A DECK ASSEMBLY,AUDIO CDP(CDM-300) CKD-HZ 4861RH0004A CLAMP ASSEMBLY DISC (CDM-300) 4405RHD009A MECHANISM ASSEMBLY MAIN LOADING CDP (CDM-300) 6717RCA001A PICK UP ASSY KSM-213VSCM SONY FRONT LOADING 3300R-0547B PLATE CLAMP (CDM-300) 524-012AAAA COVER CLAMP MAGNET (030X018X5T) 4860R-0016A CLAMP DISC (CDM-300)

This manual is also suitable for:

Lxs-m230

Table of Contents