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Troubleshooting
Related Manuals for LG DP450G
Summary of Contents for LG DP450G
- Page 1 Internal Use Only Website http://biz.lgservice.com PORTABLE DVD SERVICE MANUAL MODEL : DP450G CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN73065026 MARCH, 2009...
- Page 2 CONTENTS SECTION 1..SUMMARY SECTION 2..EXPLODED VIEWS SECTION 3..ELECTRICAL SECTION 4..REPLACEMENT PARTS LIST...
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Page 3: Table Of Contents
SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ......1-3 SERVICING PRECAUTIONS ........................1-4 • GENERAL SERVICING PRECAUTIONS • INSULATION CHECKING PRODEDURE • ELECTROSTATICALLY SENSITIVE (ES) DEVICES SPECIFICATIONS ............................1-5... -
Page 4: Product Safety Servicing Guidelines For Video Products
When servicing this product, under no circumstances should the original design THE WATER PIPE. METAL PART be modified or altered without permission from LG Corporation. All components should be replaced only with types identical to those in the original circuit and CONDUIT. ETC their physical location, wiring and lead dress must conform to original layout upon completion of repairs. -
Page 5: Servicing Precautions
SERVICING PRECAUTIONS Electrostatically Sensitive (ES) Devices CAUTION: Before servicing the PORTABLE DVD covered by this service data and its supplements and addends, read Some semiconductor (solid state) devices can be damaged and follow the SAFETY PRECAUTIONS. NOTE: if unfore- easily by static electricity. Such components commonly are seen circumstances create conflict between the following called Electrostatically Sensitive (ES) Devices. -
Page 6: Specifications
SPECIFICATIONS • General Power requirements DC 12V Power consumption External Dimensions 202 x 39 x 164mm (W x H x D) Net Weight (Approx.) 0.85kg Operating temperature 5°C to 40°C Operating humidity 5% to 90% Laser Semiconductor laser Signal system •... -
Page 8: Exploded Views
SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS ............................2-2 1. CABINET AND MAIN FRAME SECTION ....................2-2 2. PACKING ACCESSORY SECTION ......................2-3... -
Page 9: Exploded Views
EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION... -
Page 10: Packing Accessory Section
2. PACKING ACCESSORY SECTION 808 BATTERY CABLE, CIGAR JACK 801 OWNER'S MANUAL PLUG ASS'Y(RCA CABLE) 804 PACKING SHEET POWER CORD REMOTE CONTROL 803 PACKING 839 CARRING CASE 802A ACC BOX SET BOX... - Page 12 SECTION 3 ELECTRICAL CONTENTS LCD PART ...............................3-2 LCD ELECTRICAL TROUBLESHOOTING GUIDE ................3-2 BLOCK DIAGRAM ............................3-3 CIRCUIT DIAGRAM .............................3-5 PRINTED CIRCUIT BOARD DIAGRAM ....................3-7 MAIN PART ..............................3-11 MAIN ELECTRICAL TROUBLESHOOTING GUIDE ...............3-11 1. POWER (DC-DC CONVERTER CIRCUIT) ....................3-11 2. MPEG CIRCUIT .............................3-14 3.
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Page 13: Lcd Part
LCD PART LCD ELECTRICAL TROUBLESHOOTING GUIDE Appear shadow form interference in black background Display condition? Inverter abnormal Fuse normal? Fuse Replace +7.5V, 15V, -10V D6, D1, D2 +5V normal? IC(U2) Check and Replace Check and Replace R G B signal output? MPEG1389LP (Pin107, 108, 109) VCOM signal? IC(U1) Check and Replace... -
Page 14: Block Diagram
BLOCK DIAGRAM LCD PANEL VCOM BLOCK ¥VGH ¥VCOM ¥VGL ¥STVR ¥STVL ¥UTC3308 IC LCD POWER BLOCK ¥CKV Connector ¥UND (Main interface) ¥VGH (+15V) ¥OEV ¥VGL (-10V) ¥VCOMO ¥7.5V ¥STVR ¥LNR ¥5V ¥STVL ¥MOD ¥CKV ¥OEH R/G/B Circuit ¥UND ¥RCR2561 IC ¥STHL ¥OEV BLOCK... -
Page 15: Circuit Diagram
CIRCUIT DIAGRAM LCD_3.3V 3.16K 3.16K 10uF/16V 10uF/16V 4.7uH 4.7uH UTC3308 UTC3308 10uF/16V 10uF/16V A OUT VCOMO 10uF/16V 10uF/16V 10uF/16V 10uF/16V A- IN B OUT VCOM VCOM A+ IN B- IN B+ IN D_15V D_15V D_10V D_10V +15V -10V AVSS AVDD 4.7uF/25 V 4.7uF/25 V 4.7uF/25V... -
Page 16: Printed Circuit Board Diagram
PRINTED CIRCUIT BOARD DIAGRAMS ( TOP VIEW ) ( BOTTOM VIEW ) - Page 17 3-10...
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Page 18: Main Part
MAIN PART MAIN ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER (DC-DC CONVERTER CIRCUIT) A. NO POWER ON BY ADAPTOR B. NO POWER ON BY BATTERY No power on No power on by ADAPTOR by BATTERY Is ADAPTOR Is BATTERY OK? Replace BATTERY Replace ADAPTOR out 12V? Replace D606... - Page 19 MAIN ELECTRICAL TROUBLESHOOTING GUIDE C. AUDIO OUT ABNORMAL D. VIDEO OUT ABNORMAL Audio out abnormal Video out abnormal Check Audio jack & mode Check Video jack & mode Check A+5V Check A+5V Check signals from MPEG Check signals from MPEG Replace IC(U502) Check IC(U502) E.
- Page 20 MAIN ELECTRICAL TROUBLESHOOTING GUIDE G. OPEN/CLOSE ABNORMAL OPEN/CLOSE abnormal Check SW201 switch Check IC(U201) Pin92 Check the connectin of MD. Refer to SERVO part. 3-13...
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Page 21: Mpeg Circuit
MAIN ELECTRICAL TROUBLESHOOTING GUIDE 2. MPEG CIRCUIT Power is on Does logo appear Check power & clock. on the screen? Does the Is MPEG data Check CD/DVD DSP Video of the DVD Disc signal normal? output signal. play properly? Check MPEG Decoder input signal. -
Page 22: Rf/Servo Circuit
MAIN ELECTRICAL TROUBLESHOOTING GUIDE 3. RF/SERVO CIRCUIT Put Disc in. Laser off Disc ID Proper RFL signal Check the related circuit on is correct? on MT1389? MT1389 RFL signal. Check the RFL connection between J401 and MT1389. Proper Does Check DMSO DMSO signal on spindle rotate. - Page 23 MAIN ELECTRICAL TROUBLESHOOTING GUIDE Proper Check connections between signals on A, B, C, D Focus on OK. MT1389 and pick-up head. of MT1389 Proper FEO signal Check the related circuit on MT1389. on MT1389 FEO sugnal. Check IC(U401) Proper FEO signal Check the related circuit Track on OK.
- Page 24 MAIN ELECTRICAL TROUBLESHOOTING GUIDE Proper Normal Check Aout_L Aout_L, Aout_R signal Audio output when related circuit Aout_R on MTK1389 disc playback. Check the related circuit of Audio DAC. Check Audio filter, amplify, mute circuit. Commun- Normal ications between IR.VFD Front pannel key & IR.
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Page 25: Charging Circuit
MAIN ELECTRICAL TROUBLESHOOTING GUIDE 4. CHARGING CIRCUIT No turn on Red LED Is 8.4V of J601_Pin3 OK? Is L601 OK? Replace L601. Is IC(U601) OK? Replace IC(U601). Is L602 OK? Replace L602. Is IC(U603) OK? Replace IC(U603). 3-18... -
Page 26: Details And Waveforms On System Test And Debugging
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK 1) MT1389L main clock is at 27MHz (Y201.1) FIG 1-1 2. SDRAM CLOCK 1) MT1389 main clock is at 27MHz (R303) FIG 2-1 3-19... -
Page 27: Mt1389 Video Output Waveform
3. MT1389 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal (CVBS) FIG 3-1 4. AUDIO OUTPUT FROM AUDIO DAC FIG 4-1 3-20... -
Page 28: Block Diagrams
BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM 3.3V 3.3V 3.3V 3.3V 3.3V/BAT_OUT 3.3V/BAT_OUT FLASH FLASH 64MBit 64MBit LCD PANEL LCD PANEL MEMORY MEMORY SDRAM SDRAM DISC DISC 27MHz 27MHz XI,XO XI,XO 1.8V/3.3V 1.8V/3.3V AV OUT AV OUT LDO1,LDO2,IOA,V20 LDO1,LDO2,IOA,V20 SPINDLE SPINDLE PICK PICK A,B,C,D,E,F,RFO,MDI1/2... -
Page 29: Power Block Diagram
2. POWER BLOCK DIAGRAM 3-22... -
Page 30: Servo Block Diagram
3. SERVO BLOCK DIAGRAM 3-23... -
Page 31: System Block Diagram
4. SYSTEM BLOCK DIAGRAM 3-24... -
Page 32: A/V Block Diagram
5. A/V BLOCK DIAGRAM 3-25... - Page 33 3-26...
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Page 34: Circuit Diagrams
CIRCUIT DIAGRAMS 1. MPEG CIRCUIT DIAGRAM DV33 47uH/NC 47uH/NC L208 L208 SF_CS L209 L209 SF_CS 2.7uH/NC 2.7uH/NC SF_DO SF_DO ADACVDD V1P4 R201 R201 100K 100K SF_DI ADACVDD SF_DI S-FLASH DV33 C233 C233 SF_CK SF_CK R207 R207 CE212 CE212 6800pF 6800pF C203 C203 CE204... -
Page 35: Memory Circuit Diagram
2. MEMORY CIRCUIT DIAGRAM SDRAM 3.3V 3.3V 2,4,7,8 U301 U301 3.3V SD33 HY57V641620 HY57V641620 DCLK L301 L301 FB(50) FB(50) DCLK CAS# CAS# RAS# RAS# + CE301 + CE301 C308 C308 C301 C301 C302 C302 C303 C303 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF... -
Page 36: Opu & Motor Circuit Diagram
3. OPU & MOTOR CIRCUIT DIAGRAM BAT_OUT OFF-PAGE CONNECTION R405 R405 STANDBY R460 R460 5.1K 5.1K A-5V 3906 3906 A-5V R448 10K R448 10K Q407 Q407 A+5V A+5V R450 R450 1.2K 1% 1.2K 1% 3.3V 3.3V 2,3,7,8 Q409 Q409 2,3,5,6,7 STANDBY FB(50) FB(50) -
Page 37: Av Circuit Diagram
4. AV CIRCUIT DIAGRAM OFF-PAGE CONNECTION L509 L509 A+5V A-5V A-5V FB(50) FB(50) A+5V A+5V C520 C520 R525 R525 10P/NC 10P/NC 2,3,4,6,7, A_MUTE_SW R526 R526 VR501 VR501 C519 C519 R515 R515 POWER I/F L_SPEAKER 0.1uF 0.1uF + CE506 + CE506 A+5V R_SPEAKER SP_L-... -
Page 38: Charge Circuit Diagram
5. CHARGE CIRCUIT DIAGRAM OFF-PAGE CONNECTION U603 U603 TP620 TP620 POWERJACK POWERJACK GT6312A GT6312A R630 R630 R631 R631 J604 J604 C621 C621 D606 SS5822 D606 SS5822 IR_OUT 2.4K 2.4K VREF TC_SET SC_SET DC_IN 0.1uF 0.1uF BAT_OUT GREEN BAT_5V C611 C611 CC_SET STANDBY C607... -
Page 39: Lcd I/F Circuit Diagram
6. LCD I/F CIRCUIT DIAGRAM VCOMO VCOMO STVL CON12_1.0MM CON12_1.0MM STVL 89L_R R716 R716 0/120 0/120 89L_G (EMC) (EMC) R707 R707 0/120 0/120 89L_B (EMC) (EMC) STHL STHL R708 R708 0/120 0/120 (EMC) (EMC) CPH1 CPH1 CPH1 89L_R 89L_R R713 R713 33/600 33/600... -
Page 40: Key Circuit Diagram
7. KEY CIRCUIT DIAGRAM K803STOP K803STOP DVD_KEY3 K801PLAY/PLAUSE K801PLAY/PLAUSE K802 K802 DVD_KEY1 MENU MENU K804NEXT K804NEXT C807 C807 C806 C806 C805 C805 C804 C804 J801 J801 K805PRE K805PRE DVD_KEY2 AD_K SLEEP DVD_KEY1 DVD_KEY2 DVD_KEY3 LCD_ON/OFF 3.3V CON8_1.0MM CON8_1.0MM C801 C801 C802 C802 K806... -
Page 41: Circuit Voltage Chart
• CIRCUIT VOLTAGE CHART • CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. - Page 42 MODE MODE MODE MODE STOP PLAY STOP PLAY STOP PLAY STOP PLAY PIN NO. PIN NO. PIN NO. PIN NO. CE206 Q515 3.34 3.33 CE605 1.41 1.40 3.34 3.33 Emitter 5.06 4.96 CE501 10.14 10.08 Collector 0.48 CE207 2.45 2.40 Base CE606 Q601...
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Page 43: Printed Circuit Board Diagrams
PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) 3-45 3-46... - Page 44 MAIN P.C.BOARD (BOTTOM VIEW) 3-47 3-48...
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Page 45: Key P.c.board
2. KEY P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-49 3-50...