LG LX-E330A Manual

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❍ SECTION 1. GENERAL

• SERVICING PRECAUTIONS ..................................................................................................... 1-2

• ESD PRECAUTIONS ................................................................................................................. 1-4

• SPECIFICATION ........................................................................................................................ 1-5

❍ SECTION 2. TROUBLESHOOTING

• ADJUSTMENTS ......................................................................................................................... 2-1

• TROUBLESHOOTING ............................................................................................................... 2-2

• WAVEFORMS OF MAJOR CHECK POINT ............................................................................... 2-6

• BLOCK DIAGRAM .................................................................................................................... 2-15

• SCHEMATIC DIAGRAMS ........................................................................................................ 2-17

• WIREING DIAGRAM ................................................................................................................ 2-23

• PRINTED CIRCUIT BOARD DIAGRAMS ................................................................................ 2-25

• INTERNAL BLOCK DIAGRAM OF ICs .................................................................................... 2-35

❍ SECTION 3. EXPLODED VIEWS

• CABINET AND MAIN FRAME SECTION ................................................................................... 3-1

❍ SECTION 4. SPEAKER PART

• SPEAKER PART ........................................................................................................................ 4-1

❍ SECTION 5. REPLACEMENT PARTS LIST

• REPLACEMENT PARTS LIST .................................................................................................... 5-1

[CONTENTS]

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Table of Contents

Summary of Contents for LG LX-E330A

Page 1 [CONTENTS] ❍ SECTION 1. GENERAL • SERVICING PRECAUTIONS ..................... 1-2 • ESD PRECAUTIONS ......................... 1-4 • SPECIFICATION ........................1-5 ❍ SECTION 2. TROUBLESHOOTING • ADJUSTMENTS ......................... 2-1 • TROUBLESHOOTING ....................... 2-2 • 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
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 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: 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 6 ❏ TROUBLESHOOTING • CD PART Turn power on. Check power supply circuit. PN808 PIN1, 12V Is power on? PN808 PIN2, 6.2V PN808 PIN3, 5V IC803 PIN2, 3.3V Does initial Check the connector PN801, Check the DISK circuit. read work? PN802, PN803, PN807, PN808. Check the Laser.
Page 7 FAILS TO INITIAL READ • Defective connection PN807. Do voltage N 807 PIN11(MM+), PIN Does MD act? • Check the MICOM. 12 (MM-), PIN13 (SOL) change? Defective connector PN802. Disc motor turns. Check the Data transferred from Does RF waveform •...
Page 8 Laser does not light. Is “2.5V” applied to pin80 of IC801? Did pickup return to Is data transferred from Defective MICOM. innermost circular? MICOM IC ? Does voltage appear at IC 802 pin13, 14? Defective IC801, 802 . Defective slide motor and/or connector.
Page 9 Laser lights Does lens move up/down? Defective IC801. Check the signal of FOCUS SEARCH. (IC801 Pin 21) Chekc the signal of PN801 pin 13, 16. Defective IC802. Open activator and/or connector. Does FE signal appear? (IC801 pin 13) Defective IC801. Degraded laser diode Does DRF signal appear? Defective PICK-UP...
Page 10 ❏ WAVEFORMS OF MAJOR CHECK POINT 1. HF signal (RF signal ) waveform 2. EFM signal (IC801 pin 3)waveform (IC801 pin3) during normal play during Normal Play 0.5V/Div. 0.5V/Div. 500nS/Div. 5µS/Div. 3. Focus coil drive waveform(IC802 pin13) • Focus coil drive waveform(FDO: IC801 pin21) and •...
Page 11 ❏ AUDIO PART P-SENS PART Does +4.2V 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.
Page 12: 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(+).
Page 13: Audio Abnormal
MUTING CIRCUIT (MUTE) Base “High” appear at Q701, Q751“B”. Check the “High” of PN601 pin19. Check the “High” of the IC301 pin2. check the “Low” of Q701, Q751, “C”. Refer to IC 301 Troubleshooting. MUTE Replace the TR. AUDIO ABNORMAL Check the signal output of IC701 pin3, 4.
Page 14 FUNCTION MODE AUDIO ABNORMAL TAPE Check the signal input of IC601 pin3, 26. Refer to “IC201 Troubleshooting”. Chekc the signal input of IC601 pin5, 24. Check the signal input of JK601. Check the signal input of IC601 pin6, 23. Check the signal input of CN603 pin6, 8. TUNER Check the signal input of IC601 pin4, 25.
Page 15 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 pin11. (Low ©...
Page 16 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. PLAY Check the VCC supplying to IC201 pin4. Refer to “Power Circuit Troubleshooting”.
Page 17 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 IC301 pin77. Replace the Q202, Q252. Check the output of IC203 pin3, 7. Check the Vcc power of IC203 Pin6.
Page 18 • CD P.C. BOARD (SOLDER SIDE) - 2-33 -...
Page 19 • CD P.C. BOARD (COMPONENT SIDE) - 2-34 -...
Page 20 ❏ INTERNAL BLOCK DIAGRAM OF ICs I KIA6225P/S (IC201) BIPOLAR LINEAR INTEGRATED CIRCUIT I STK403-030(IC701) Equivalent Block Diagram - 2-35 -...
Page 21 I BA3126N (IC202) 2-channel head switch for radio cassette recoreders • Internal circuit configuration I BA3308 (IC203) Dual preamplifier with ALC - 2-36 -...
Page 22 I LC78646E (IC801) 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 23: Section 4. Speaker Section
SECTION 4. SPEAKER SECTION MODEL: LXS-E330 - 4-1 -...
Page 24: Block Diagram
BLOCK DIAGRAM 2-15 2-16...
Page 25: Schematic Diagrams
SCHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAMS 2-17 2-18...
Page 26 FRONT/POWER 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 27 • CDP SCHEMATIC DIAGRAM 2-21 2-22...
Page 28: Wiring Diagram
WIRING DIAGRAM 2-23 2-24...
Page 29: Printed Circuit Board Diagrams
PRINTED CIRCUIT BOARD DIAGRAMS • MAIN P.C. BOARD(SOLDER SIDE) 2-25 2-26...
Page 30 • MAIN P.C. BOARD(COMPONENT SIDE) 2-27 2-28...
Page 31 • FRONT/POWER P.C. BOARD (SOLDER SIDE) 2-29 2-30...
Page 32 • FRONT/POWER P.C. BOARD (COMPONENT SIDE) 2-31 2-32...
Page 33: 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 34 • TAPE DECK MECHANISM: AUTO REVERSE DECK...
Page 35 • TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL)
Page 36 • CD MECHANISM...

This manual is also suitable for:

Lx-e330d Lx-e330x Lxs-e330-1