LG LDC-A310 TROUBLESHOOTING GUIDE

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE

PUSH THE POWER

IC301-45

(SCAN IN 3)

PULSE INPUT

YES

IC302-7 3.6 V

(LENS 3.6V)

YES

IC301-10

(VDD)

HIGH

IC301-36 (RESET)

HIGH

IC301-43

(BAT OFF)

HIGH

IC301-40

OSCILLATION

YES

IC301-37

OSCILLATION

YES

LOW

CHECK S6002, CN601, CN301

CHECK IC955, Q9551

CHECK IC302

CHECK IC302, R3004

CHECK R3003

CHECK X3001

CHECK X3002

TAKING INOPERATIVE

PUSH SHUTTER

BUTTON

IC301-28, 29 (SCAN IN 0, 1) PULSE INPUT

YES

CN301-5, 6

(P ON, P(A) ON)

HIGH

SERIAL

COMMUNICATION

CHECK CP1 DMA

BLOCK

LOW

CP1 DMA BLOCK

CHECK

S6001, CN601,

CN301, D3011

CHECK

IC301, RB301

CHECK IC301,

CHECK IC301

NO PICTURE

CLK (98 MHz)

INPUT TO

IC101-5 (CLK IN 1)

CLK (48 MHz)

INPUT TO

IC101-6 (CLK IN 2)

IC301-15, 16

(ASIC_SO, ASIC_SI)

CHECK SOLDERING

OF MEMORY

EACH PIN

MAIN CLOCK FOR SYSTEM OPERATION

NO OPERATION IF ABSENT CHECK X1101 OSCILLATOR AND IC111

CHECK IC111 etc.

INCORRECT HANDSHAKING

BETWEEN 8-BIT CPU AND ASIC CHECK EACH INTERFACE

– 18 –

6. PARTS LIST

LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION

CABINET & CHASSIS PARTS

1 636 072 2743 DEC LENS-SX714/U 2 636 072 5171 ADHESIVE DEC VF-SX714/U 3 636 072 2736 DEC VF-SX714/U 4 636 072 2729 DEC RING-SX714/U 5 636 072 2699 CABINET LEFT-SX714/U 6 636 072 2750 DEC GRIP-SX714/U 7 636 072 5164 ADHESIVE DEC RING-SX714/U 8 636 072 2668 BUTTON SHUTTER-SX714/U 9 636 064 4977 SPRING SHUTTER-SX541/JM 10 636 072 4174 ASSY,CABINET FRONT-SX714U 11 636 072 2675 BUTTON POWER-SX714/U 12 636 072 2774 REFLECTOR LED-SX714/U 13 645 063 5830 LENS(ASSY),K190YB 14 636 071 8548 TERMINAL BATT C-SX714/U 15 636 072 2705 COVER BATTERY-SX714/U 16 636 071 8463 STAND-SX714/U, STAND 17 636 071 8500 SPRING EARTH A-SX714/U 18 419 002 6604 PIEZO BUZZER PS1550L40N 19 636 071 8531 TERMINAL BATT B-SX714/U 20 636 071 8524 TERMINAL BATT A-SX714/U 21 636 072 7328 LABEL CAUTION BATT-SX714 22 636 072 5652 ASSY,WIRE BATT-SX743 23 636 074 2062 SPACER CONDENSER-SX714/U 24 636 071 8357 HOLDER CHASSIS-SX714/U 25 636 071 8449 SPACER CHASSIS-SX714/U 26 645 061 7126 ASSY,LAMP,SX743 27 636 073 5422 SHIELD TAPE BAT1-SX714/U 28 636 071 8432 SPACER HOLDER B-SX714/U

106

29 636 073 6047 ASSY,WIRE BAT + SX743 30 636 071 9477 COMPL PWB,TB-1 31 636 074 2444 SHIELD TAPE TOP2-SX714/U 32 645 061 9779 FLEXIBLE FLAT CABLE 33 636 073 6948 SPACER FUSE-SX714/U 34 645 061 7973 OPTICAL FILTER 35 636 071 3970 SPACER 36 409 545 8401 IC ICX432JQ-C 37 636 071 3963 MOUNTING,LENS 38 636 071 9460 COMPL PWB,CP-1 39 636 071 8425 SPACER HOLDER A-SX714/U 40 636 071 8340 HOLDER MONITOR-SX714/U 41 636 073 7556 SPACER BUTTON ZOOM-714/U 42 645 062 3028 LCD(COM16T1186) 43 636 072 0978 ASSY,WIRE LCD-BL(C)-SX743 44 636 072 0961 ASSY,WIRE LCD-BL(A)-SX743 45 636 072 1081 SPACER SLIDE-SX714/U 46 636 071 8487 SLIDE FUNCTION-SX714/U 47 636 072 4198 ASSY,CABINET BACK-SX714/U 48 645 063 7612 PAD(L=12) 49 636 071 8456 SPACER MONITOR-SX714/U 50 636 071 8371 KNOB FUNCTION-SX714/U 51 636 072 2767 DEC MONITOR-SX714/U 101 411 176 6909 SCR S-TPG PAN PCS 1.7X5.0 102 411 175 6405 SCR S-TPG PAN PCS 1.7X2.5 103 411 178 8802 SCR S-TPG PAN PCS 1.7X2.0 104 411 180 2102 SCR S-TPG PAN PCS 1.7X3.5 105 411 181 8707 SCR S-TPG PAN PCS 1.4X3.5 106 411 178 9403 SCR S-TPG PAN PCS 1.7X4.0

104

101

102

106

102

101

103

102

106

102

105

101

105

106

SX714/U Parts List

101

N.S.P.: Not available as service parts.

ELECTRICAL PARTS

Note:

1. Materials of Capacitors and Resistors are abbreviated as follows ; Resistors Capacitors MT-FILM Metallized Film Resistor MT-POLYEST Metallized Polyester Capacitor MT-GLAZE Metallized Glaze Resistor MT-COMPO Metallized Composite Capacitor OXIDE-MT Oxide Metallized Film Resistor TA-SOLID Tantalum Solid Capacitor

2. Tolerance of Capacitor (10pF over) and Resistor are noted with follow symboles.

F ............1% G ............2% J ............5% K ............10%

M ..........20% N ..........30% Z ..........+80% ~ -20%

3. Capacitors

FP : pF

U :

4. Inductors

H MH : mH

UH :

5. N.S.P. : Not available as service parts.

LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION

COMPL PWB,CP-1

636 071 9460

VA131 408 050 0504 VARISTOR AVR-M1005C080MT VA132 408 050 0504 VARISTOR AVR-M1005C080MT VA133 408 050 0504 VARISTOR AVR-M1005C080MT VA134 408 050 0504 VARISTOR AVR-M1005C080MT

Q1304 405 168 3700 TR DTC144EM Q1305 405 167 0304 TR EMD3 Q1306 405 166 9506 TR EMH2 Q1431 405 168 3809 TR DTA144EM Q1432 405 167 0403 TR EMD12 Q1501 405 166 9605 TR EMT1 Q1502 405 168 3908 TR EMZ1 Q1503 405 102 6705 TR 2SA1745-7 OR 405 102 8303 TR 2SA1745-6 Q1504 405 168 3700 TR DTC144EM Q1701 405 173 3009 TR 12A01SS Q1702 405 168 3700 TR DTC144EM Q3001 405 168 4004 TR DTA114EM Q3002 405 115 6709 TR DTC123EE Q3003 405 168 3809 TR DTA144EM Q3004 405 168 3700 TR DTC144EM Q3005 405 102 5609 TR 2SD1819A-R OR 405 092 4101 TR 2SC4081-R Q5001 405 162 3805 TR CPH3413 Q5002 405 163 3606 TR CPH3409 Q5003 405 163 2302 TR CPH3307 Q5004 405 152 5406 TR 3LN01S-TL Q5005 405 165 1204 TR EMD2 Q5009 405 162 3706 TR CPH3313 Q5010 405 178 6807 TR MCH5809-TL-E Q5011 405 182 9009 TR EMF18 Q5013 405 178 6807 TR MCH5809-TL-E Q5014 405 182 9009 TR EMF18 Q5016 405 183 4300 TR EMH9-T2R Q5018 405 115 5108 TR 2SA1774 R Q5021 405 182 9009 TR EMF18 Q5022 405 182 9009 TR EMF18 Q5401 405 115 7508 TR DTC123JE Q5402 405 169 4508 TR DTC114EM OR 405 172 4601 TR UNR32A1 Q5405 405 170 0308 TR CPH5504-E Q5407 405 152 5406 TR 3LN01S-TL Q5409 405 171 4800 TR CY25BAJ-8F Q5410 405 102 6705 TR 2SA1745-7 OR 405 102 8303 TR 2SA1745-6 Q5411 405 168 3700 TR DTC144EM OR 405 172 4700 TR UNR32A3 Q9002 405 153 6709 TR 2SC3931-D Q9003 405 102 5609 TR 2SD1819A-R OR 405 092 4101 TR 2SC4081-R

(VARISTORS)

(SEMICONDUCTORS)

AL-SOLID Aluminum Solid Capacitor NP-ELECT Non-Polarized Electrolytic Capacitor OS-SOLID Aluminum Solid Capacitors with Organic

Semiconductive Electrolytic Capacitor

DL-ELECT Double Layered Electrolytic Capacitor

Q9004 405 165 1204 TR EMD2 Q9501 405 168 3700 TR DTC144EM Q9505 405 115 7508 TR DTC123JE Q9521 405 169 4508 TR DTC114EM Q9522 405 169 4508 TR DTC114EM Q9523 405 169 4508 TR DTC114EM Q9551 405 173 3702 TR FDC633N Q9552 405 164 7603 TR DTC114YM

(INTEGRATED CIRCUITS)

IC101 410 472 1502 IC KS6U2U1715CBP (N.S.P.) IC103 409 541 5107 IC K4S283233F-MN1L (N.S.P.) OR 409 548 5001 IC EDS1232AABB-75 (N.S.P.) IC105 409 479 6009 IC TC7MH273FK IC106 409 479 6009 IC TC7MH273FK IC111 409 540 3708 IC BU2389KN-E2 IC121 409 566 4802 IC 64400714A (N.S.P.) IC151 409 528 6301 IC TK15465STB IC172 409 446 9309 IC NJM2125F IC301 410 496 4602 IC UPD780023AGB-G26-8EU OR 410 488 6102 IC UPD78F0034AGB-G26-8EU IC302 409 530 6900 IC S-8424BAAFT IC501 409 544 2103 IC FA7709R-H1 IC502 409 545 5707 IC XC6202P502M IC904 409 543 2807 IC CXD3440EN-1 IC905 409 564 4002 IC HD49335NP01 IC909 409 505 9400 IC TK11130CS IC951 409 512 9806 IC LB8649FN IC952 409 320 9401 IC TC7S66FU IC955 409 526 4002 IC XC9104D095M

(DIODES)

D1001 407 210 1900 DIODE 1SS400 D1501 407 109 4609 DIODE MA728 D1701 407 221 4105 DIODE MA2SD19 D3001 407 205 2806 DIODE RB520S-30 D3004 407 232 2503 LED SML-512UW-T86 D3005 407 222 4807 LED SML-521MUW D3011 407 227 3102 DIODE EMP11 D3012 407 227 3102 DIODE EMP11 D3013 407 227 3201 DIODE EMN11 D5001 407 225 3609 DIODE HN2D01JE D5002 407 210 5403 DIODE RB551V-30 D5004 407 232 3609 DIODE SD833-04SC D5005 407 210 5403 DIODE RB551V-30 D5006 407 223 2604 DIODE CRS06 D5007 407 233 8504 ZENER DIODE EDZ16B D5012 407 232 3609 DIODE SD833-04SC D5014 407 232 3609 DIODE SD833-04SC D5015 407 205 5203 DIODE RB521S-30 D5402 407 229 9508 DIODE F1P8 D5403 407 228 5402 DIODE CRG02 D5404 407 229 8709 DIODE CMC01 D5405 407 231 1507 THYRISTOR CR05BS-8 D5407 407 162 8507 DIODE DAN222 D5408 407 205 5203 DIODE RB521S-30

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