Table of Contents
Advertisement
Quick Links
❍ SECTION 1.GENERAL
• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
❍ SECTION 2.ELECTRICAL SECTION
• TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
• PRINTED CIRCUIT BOARD DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
❍ SECTION 3.DVD PART
• DVD ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
• INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
• SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
• PRINTED CIRCUIT BOARD DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33
❍ SECTION 4. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
• TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
• TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) . . . . . . . . . . . . . . . . . . . . . . . . .4-7
❍ SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
❍ SECTION 6. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
[CONTENTS]
- 1-1 -
Advertisement
Table of Contents
Related Manuals for LG LM-D2540A
Summary of Contents for LG LM-D2540A
- Page 1 [CONTENTS] ❍ SECTION 1.GENERAL • SERVICING PRECAUTIONS ..........1-2 •...
-
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 - 1-6 -...
-
Page 6: Section 2. Electrical
SECTION 2. ELECTRICAL ❏ TROUBLESHOOTING GUIDE P-SENS CHECK ZD900 voltage check (+5.1V) D901(+) waveform check D901 replacement IC301 PIN26 check R902 check ZD900 replacement VKK CHECK PN903 PIN5, CN302 PIN5 DC -33V check ZD901(+) -33V check IC301 PIN51 DC -33V check C919(-) -33V up to check Q902 TURN ON check D908, D909 replacement... -
Page 7: Power Check
POWER CHECK Every kinds of Fuse check Fuse replacement IC700 “12”(+VH2), 6(-VH2) PIN DC power output check PN900 PIN1, 5 DC voltage output check D900 replacement D900 PIN2, 3 AC check replacement Transformer replacement CN901 PIN5 +12V(D) power check CN901 PIN6, 7 DC +16V over power check Transformer replacement D901 AC voltage input check IC902(7812) assemble check replacement... - Page 8 CD/DVD/KARAOKE FUNCTION CN901 PIN9 PIN DVDCTRL “HIGH” check IC301 PIN81 DVD-CTRL “HIGH” check IC301 replacement PATTERN Check CN901 PIN11 +8V(A) power check IC301 “81” +16 PIN DC +16 over power check Transformer replacement D913 AC voltage input check CN901 PIN5 +12V(D) power check IC902(7812) assemblecheck replacement IC904(78R08) check replacement...
- Page 9 Muting circuit Troubleshooting (if MUTE) IC301 PIN91 F-MUTE “HIGH” check Muting mode check IC301 replacement Q791 “C” PORT “HIGH” check Q791 “E” PORT “HIGH” check PATTERN check Q791 replacement Q700/Q750 “C” PORT SIGNAL check normal Q700/Q750 replacement IC301 PIN2 WOOFER-MUTE “HIGH” check Muting mode check IC301 replacement Q741 “C”...
- Page 10 no sound Q700/750 “C” signal check IC602 input check IC601 input check IC602 replacement IC605 input check each function TROU- IC601 replacement BLESHOOTING refer IC605 replacement JK700 SPEAKER output check Q795 “E” HIGH check Q1720 “B” (+), (-) DC voltage check RY700 +12V(A) power check Q1725 TURN-ON check +12V(A) power Troubleshooting refer...
- Page 11 Specific FUNCTION MODE has no sound AUX FUNCTION SPEAKER output IC700 output check(Front -L/R) IC700 input check (Front -L/R) IC602 PIN2, 19 input check Output sound Troubleshooting refer (FRONT -L/R) IC700 replacement IC601 PIN5, 24 input check(IN-L/R) IC602 replacement IC601 replacement IC601 PIN5, 24 input check(AUX -L/R) JK600 AUX input signal cable or external component sound output check...
- Page 12 CD/DVD function speaker output IC602 PIN2, 19: F-L/R, 3, 17 PIN : R-L/R, PIN18: CNT input check IC601 PIN3, 26 input check (DVD -L/R) PN600 PIN2, 4, 8, 10, 12 IC602 replacement output check (DVD F-L/R, R-L/R, CNT) IC601 replacement DVD Troubleshooting refer PATTERN check TUNER FUNCTION SPEAKER output...
- Page 13 IC301 U-COM IC Troubleshooting IC301 pin17, 46, 72, 90 +5V power check CN302 PIN6 DC +5.6V check Troubleshooting Refer PATTERN check IC301 PIN26 5V check (POWER-SENS) P-SENS refer X301 oscilates or not X301 replacement When IC301 pin11 voltage input Low©High RESET circuit check IC301 replacement IC501(EXPENDER IC) Troubleshooting...
- Page 14 IC700(AMP IC) Troubleshooting PIN10, 14 Signal input check Muting circuit refer 2(+VH2), 1(-VH2) power check Power IC replacement PIN3, 4, 5, 6 signal output check PIN3, 4, 5, 6 DC check Power IC replacement TAPE PLAY IC202 “18” pin VCC check Troubleshooting check refer IC202 “5, 20”...
- Page 15 TAPE REC check (A252, Q202 On: R273, R223 High IC202 PIN11, 14 signal input check Q253, Q203 Base “Low” check IC501 Troubleshooting refer Q253, Q203 replaement IC202 PIN9, 16 output check IC202 PIN18 VCC check IC201 ‘6” (12V) , PIN4 High check IC501 Troubleshooting check L203 PIN5, 6 oscilates or not C236(+) power input check...
-
Page 16: Block Diagram
❏ BLOCK DIAGRAM 2-11 2-12... -
Page 17: Main Schematic Diagram
❏ SCHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAM 2-13 2-14... - Page 18 • MAIN(AMP), SUB POWER SCHEMATIC DIAGRAM 2-15 2-16...
- Page 19 • MAIN(DECK) SCHEMATIC DIAGRAM 2-17 2-18...
-
Page 20: Front Schematic Diagram
• FRONT SCHEMATIC DIAGRAM 2-19 2-20... - Page 21 • MIC SCHEMATIC DIAGRAM 2-21 2-22...
- Page 22 • POWER, A/V JACK SCHEMATIC DIAGRAM 2-23 2-24...
- Page 23 • POWER, A/V JACK SCHEMATIC DIAGRAM 2-25 2-26...
-
Page 24: Wiring Diagram
❏ WIRING DIAGRAM 2-27 2-28... -
Page 25: Printed Circuit Diagrams
❏ PRINTED CIRCUIT DIAGRAMS • MAIN P.C. BOARD (SOLDER SIDE) 2-29 2-30... - Page 26 • MAIN P.C. BOARD (COMPONENT SIDE) 2-31 2-32...
- Page 27 • FRONT P.C. BOARD (SOLDER SIDE) 2-33 2-34...
- Page 28 • FRONT P.C. BOARD (COMPONENT SIDE) 2-35 2-36...
- Page 29 • POWER P.C. BOARD (COMPONENT SIDE) 2-37 2-38...
- Page 30 • POWER P.C. BOARD (SOLDER SIDE) 2-39 2-40...
- Page 31 • POWER P.C. BOARD (SOLDER SIDE) • FAN ZIG P.C. BOARD • POWER P.C. BOARD (COMPONENT SIDE) • DOUBLE VOLTAGE P.C. BOARD 2-41 2-42...
- Page 32 • A/V JACK P.C. BOARD (SOLDER SIDE) • A/V JACK P.C. BOARD (COMPONENT SIDE) 2-43 2-44...
- Page 33 2-45 2-46...
-
Page 34: Section 3. Dvd Part
SECTION 3. DVD PART ❏ DVD ELECTRICAL TROUBLESHOOTING GUIDE 1. Power check flow - 3-1 -... - Page 35 2. Test & debug flow - 3-2 -...
- Page 36 - 3-3 -...
- Page 37 - 3-4 -...
- Page 38 - 3-5 -...
- Page 39 - 3-6 -...
-
Page 40: Internal Block Diagram Of Ics
❏ INTERNAL BLOCK DIAGRAM of ICs • ES6603 (IC401) BLOCK DIAGRAM - 3-7 -... - Page 41 - 3-8 -...
- Page 42 - 3-9 -...
- Page 43 - 3-10 -...
- Page 44 • BA5954FM (IC404) BLOCK DIAGRAM - 3-11 -...
- Page 45 • ES6698 (IC501) BLOCK DIAGRAM - 3-12 -...
- Page 46 - 3-13 -...
- Page 47 - 3-14 -...
- Page 48 - 3-15 -...
- Page 49 - 3-16 -...
- Page 50 - 3-17 -...
- Page 51 - 3-18 -...
- Page 52 - 3-19 -...
- Page 53 - 3-20 -...
- Page 54 - 3-21 -...
-
Page 55: Dvd Block Diagram
❏ DVD BLOCK DIAGRAM • ESS 3-CHANGER SYSTEM BLOCK DIAGRAM - 3-22 -... - Page 56 • ESS 3-CHANGER MEMORY & HOST I/F BLOCK DIAGRAM - 3-23 -...
- Page 57 • ESS 3-CHANGER SERVO & MOTOR BLOCK DIAGRAM - 3-24 -...
- Page 58 • ESS 3-CHANGER A/V SYSTEM BLOCK DIAGRAM - 3-25 -...
-
Page 59: Repairs Regarding Cd Mechanism
❏ REPAIRS REGARDING CD MECHANISM • IMPROVED MECHOD-WHEN THE TRAY GEARS WERE DISTORTED BASE MAIN GEAR PU DOWN GEAR MAIN GEAR CAM TRAY LOADING PICK UP 1. How to open the tray Push two hooks (H) of the BASE MAIN, and open the TRAY LOADING 2. -
Page 60: Mpeg Schematic Diagram
❏ SCHEMATIC DIAGRAMS • MPEG SCHEMATIC DIAGRAM 3-27 3-28... -
Page 61: Rf & Servo Schematic Diagram
• RF & SERVO SCHEMATIC DIAGRAM 3-29 3-30... -
Page 62: I/O Schematic Diagram
• I/O SCHEMATIC DIAGRAM 3-31 3-32... - Page 63 ❏ PRINTED CIRCUIT DIAGRAMS • MAIN P.C. BOARD (SOLDER SIDE) 3-33 3-34...
- Page 64 • MAIN P.C. BOARD (COMPONENT SIDE) 3-35 3-36...
-
Page 65: Section 4. Exploded Views
SECTION 4. EXPLODED VIEWS ❏ CABINET AND MAIN FRAME SECTION... - Page 66 ❏ TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION 6720AG0002C DECK,AUDIO CWM42FR47 TOKYO PIGEON L-DOUBL 6768R-PP03A DECK MECHANISM PARTS 33-160-4309 PIGEON PRESS CASSE 6768R-GP03B DECK MECHANISM PARTS 50-222-4578 PIGEON GEAR IDLER...
-
Page 67: Tape Deck Mechanism (A/R & A/S : Right A/R Deck)
❏ TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION 6720AG0002C DECK,AUDIO CWM42FR47 TOKYO PIGEON L-DOUBL 6768R-UP03D DECK MECHANISM PARTS 50-093-4895 PIGEON PWB UNIT CW 6768R-BP03D DECK MECHANISM PARTS 02-083-4254 PIGEON BELT/FELT C... - Page 68 ❏ DECK MECHANISM EXPLODED VIEWS LOCA.NO PART NO DESCRIPTION SPECIFICATION 4405RCS006E MECHANISM ASSEMBLY DVM-H1513 HZ(DP-8-VE)DVD 3 3041RBD003C BASE ASSEMBLY PU (DVM-H1513 DP-8-VE) HZ 3041R-M016L BASE ASSEMBLY SLED(DP-8-VE) HZ 3390RB0002A TRAY DISC(CDM-H1503) 4470RB0005A GEAR TRAY (CDM-H1503) 4681RBA001B MOTOR ASSEMBLY HOME TRAY (CDM-H1503) MABUCHI 6871RF9211A PWB(PCB) ASSEMBLY,FRONT 1503 T/D SENSOR...
-
Page 70: Section 5. Speaker Part
SPK LMS-D6540V MOLD FRONT PANE 3720RMF107A PANEL,FRONT SPK LMS-D6540V MOLD RIGHT FRON 353M050C SCREW,DRAWING BH 3.5X16 FBK 6400RMXY01A SPEAKER,GENERAL (FE-376E) PIEZO LG 0OHM 0W 0DB 353M025F SCREW,DRAWING TAPTITE, 3X8 FZMY 6400TSMA02A SPEAKER,TWEETER CTR-50B55L SAMMI TWEETER(CONE) 353M050M SCREW,DRAWING + 2 D3.5 L10.0 MSWR3/FZY... - Page 71 - 5-2 -...