LG EAY43596801, YP32DVR Schematic

SAFETY PRECAUTIONS

SERVICE WARNING

Only qualified service technicians who are familiar with safety checks and
guidelines should perform service work. Before replacing parts, discon­nect power source to protect electrostatically sensitive parts. Do not
attempt to modify any circuit unless so recommended by the manufac­turer. When servicing the receiver, use an isolation transformer between
the line cord and power receptacle.

GENERAL GUIDELINES

Perform a final SAFETY CHECK before returning receiver to customer.
Check repaired area for poorly soldered connections, and check entire
circuit board for solder splashes. Check board wiring for pinched wires or
wires contacting any high wattage resistors. Check that all control knobs,
shields, covers, grounds, and mounting hardware have been replaced. Be
sure to replace all insulators and restore proper lead dress.

SAFETY CHECKS  FIRE AND SHOCK HAZARD

Cold Leakage Checks for Receivers with Isolated Ground

Unplug the AC cord, connect a jumper across the plug prongs, and turn
the power switch on (if applicable). Use an ohmmeter to measure the
resistance between the jumped AC plug and any exposed metal cabinet
parts such as antenna screw heads, control shafts, or handle brackets.
Exposed metal parts with a return path should measure between 1M ohms
and 5.2M ohms. Parts without a return path must measure infinity.

Hot Leakage Current Check

Plug the AC cord directly into an AC outlet. DO NOT use an isolation trans­former. Use a 1500 ohms, 10W resistor in parallel with a .15µF capacitor to
connect between any exposed metal parts on the receiver and a good earth
ground. (See figure below.) Use an AC voltmeter with at least 5000 ohms per volt
sensitivity to measure the voltage across the resistor. Check all exposed metal
parts and measure voltage at each point. Voltage measurements should not
exceed .75VAC, 500µA. Any value exceeding this limit constitutes a potential
shock hazard and must be corrected. If the AC plug is not polarized, reverse the
AC plug and repeat exposed metal part voltage measurement at each point.

5388

LCD SERIES

SET 5388

GridTrace Location

Miscellaneous Adjustments ...................... 2

Parts List ................................................... 1

Placement Chart (Resistances) ................. 3

Placement Chart (Voltages) ...................... 3

Safety Precautions .................................... 1

Schematic Component Location .............. 2

Schematic Notes ....................................... 2

Schematics

LCD SERIES

INDEXINDEX

INDEX

INDEXINDEX

Power Supply .................................... 1

Power Supply Schematic ................... 2

5388

Technical Service Data

LG

MODEL 32LC7D (CHASSIS LA73E)

5388

1

The listing of any available replacement part herein in no case constitutes a recommendation, warranty, or guarantee by
SAMS Technical Publishing, LLC as to the quality and suitability of such replacement part. The numbers of the listed parts have
been compiled from information furnished to SAMS Technical Publishing, LLC by the manufacturers of the specific type of
replacement part listed.

Reproduction or use, without express permission, of editorial or pictorial content, in any manner, is prohibited. No patent
liability is assumed with respect to the use of the information contained herein.

© 2008 SAMS Technical Publishing, LLC

9850 E. 30th St.
Indianapolis IN 46229
www.samswebsite.com

MODEL 32LC7D (CHASSIS LA73E)

THIS IS A GREEN PRODUCT

Do not use lead based solder for repair. Use only
green product parts for replacement.

Essential coverage

for servicing an LCD receiver...

 Power Supply Schematic

 Miscellaneous adjustments

 Placement chart

 Parts list

Coverage includes these additional MODELS:

MODELS CHASSIS

32LC7D-UB LA73E
32LC7DC LA73E
32LC7DC-UB LA73E

Printed in the United States of America 5 4 3 2 1 08FP06006

Page 1 SET 5388

!IBCGC|05388X

For a Complete List of Manuals,

Visit www.samswebsite.com

JULY 2008 SET 5388

LG

Page 1 SET 5388

PARTS LIST

Item No. Type No. Mfr. Part No. Notes

BD102 D3SBA60 - -

D100 BAV70WT1 - A4

D101 BAV70WT1 - A4

D102 BAV70WT1 - A4

D104 BAV70WT1 - A4

D105 BAV70WT1 - A4

D106 BAV70WT1 - A4

D107 705S1J - -

D108 705S1J - -

D202 MBRF10100CT - -

D203 MBRD20150CT - -

D204 MBRF10100CT - -

D205 MBRD20150CT - -

D207 MBRF1060CT - -

D209 MBRF1060CT - -

D213 1N4148WS - T4 U3

D214 1N4148WS - T4 U3

D215 1N4148WS - T4 U3

D243 1N4148WS - T4 U3

D501 UF4007 - -

D502 UF1007 - -

D503 UF1007 - -

D505 1N4148WS - T4 U3

D510 1N4148WS - T4 U3

D601 S3V 60 - -

D602 FSU10A60 - -

D603 1N4148WS - T4 U3

PC100 EL817 - -

PC130 EL817 - -

PC150 EL817 - -

PC500 EL817 - -

Q100 MMBT2222AT - 1P

Q101 MMBT2222AT - 1P

Q102 BC850B - 2F

Q103 BC850B - 2F

Q150 STP9NK60Z - -

Q151 STP9NK60Z - -

Q200 BC850B - 2F

Q201 MMBT2222AT - 1P

Q202 MMBT2222AT - 1P

Q204 MMBT2222AT - 1P

Q205 AP62T03GH - -

Q207 AP60T03GH - -

Q500 BC850B - 2F

Q501 MMBT2222AT - 1P

Q502 BC850B - 2F

Q606 STW20NM60 - -

Q608 MMBT2222AT - 1P

Q609 - - SL 2C

U100 001 H26 - -

U101 MIC4428 - -

U102 EA1 - -

U130 EA1 - -

U200 IRU3037GH - -

Item No. Type No. Mfr. Part No. Notes

U202 EA1 - -

U203 EA1 - -

U500 ICE3B1565 - -

U502 KA78L15AZ - -

U600 1D0750 5501A - -

Item No. Function/Rating Mfr. Part No. Notes

C211 .01 1kV - -

F100 Fuse - 5Amp, 250V

FB101 Ferrite Bead - -

FB501 Ferrite Bead - -

FB601 Ferrite Bead - -

L200 - - -

L202 - - -

L203 - - -

L204 - - -

L205 - - -

L206 - - -

L600 Choke - LP-001/SJ0729

LF101 Line Choke - -

LF102 Line Choke - -

T101 SMT - LM-002/SJB-003/SJ/SJ0732

T150 - - DT101

T501 SMT - LS-003/SJ0727

TH600 DSC 15D-15 - -

TH601 DSC 15D-15 - -

VA100 Varistor TVR14621 - -

ZD100 - - WJ

ZD200 1N5245 - -

ZD502 1N5227 - -

ZD503 1N5251 - -

# Display EAJ37543301 LCD

PC Board EBR37277301 Control Key
PC Board EBR38577601 LED

EBR36011401 LED
PC Board (1) EBU38568601 Main
PC Board (2) EBU38099801 Main

# PC Board EAY34795001 Power Supply

EAY36768101 Power Supply
PC Board EBR38575001 Side AV

EBR36010601 Side AV
Power Cord 6410TUW008A AC, Polarized
Remote Control AKB32559904 Assembly
Speakers EAB33496901 8 Ohms, 10W

# For SAFETY use only equivalent replacement part.

(1) Used in MODELS 32LC7D and 32LC7D-UB.
(2) Used in MODELS 32LC7DC and 32LCDC-UB.

POWER SUPPLY BOARD TOP

POWER SUPPLY BOARD TOP, GRIDTRACE LOCATION GUIDE

SET 5388 Page 1

BD10 M5

C100 O2

C102 L4

C103 L1

C104 P4

C105 O4

C106 P4

C107 N1

C108 K1

C110 H4

C123 I3

C150 J4

C151 I4

C201 D3

C203 B4

C204 H8

C205 G8

C206 C6

C207 A8

C208 A9

C210 D6

C211 G8

C212 B8

C213 C9

C215 D8

C216 D8

C219 D8

C220 G9

C221 B3

C222 A3

C223 D3

C225 E9

C232 C4

C501 I6

C502 K9

C506 J9

C507 K8

C508 K7

C509 I7

C600 L7

C612 M8

D202 G7

D203 B2

D204 B7

D205 E2

D207 C7

D209 D7

D501 I7

D502 K8

D503 J9

D601 L7

D602 L9

F100 P3

FB101 H3

FB501 J8

FB601 L8

FR50 J6

L200 E8

L202 G9

L203 D9

L204 C9

L205 B9

L206 B4

L600 O8

LF101 M2

LF102 M4

P201 A9

P202 D1

P203 D9

PC10 I9

PC13 I1

PC15 G2

PC50 I9

Q150 I2

Q151 H2

Q207 E7

Q606 M9

R100 N1

R102 N2

R151 H3

R202 H7

R206 E7

R208 D5

R210 D4

R211 D2

R253 A4

R254 A4

R501 I6

R502 J8

R512 K7

R615 L8

SC10 O2

T101 F4

T150 K2

T501 I8

TH60 L5

TH60 L5

U500 J7

U502 K9

VA100 N2

ZD20 K9

ZD50 K8

ZD50 K7

POWER SUPPLY BOARD BOTTOM

POWER SUPPLY BOARD BOTTOM, GRIDTRACE LOCATION GUIDE

C111 J7
C113 J8

C114 K8
C115 K9

C116 J9
C117 J9

C118 J7
C119 J8

C120 K7
C121 I7

C122 I8
C124 I8

C125 O6
C126 O5

C127 O5
C128 K9

C209 G1
C214 H2

C217 H1
C218 G1

C224 F2
C226 F3

C227 F1
C228 F3

C229 G2
C230 F2

C256 E1
C503 K4

C505 K4
C602 N4

C603 N3
C604 O3

C605 O3
C606 N4

C610 O4
D100 K7

D101 J8
D102 K8

D104 H9
D105 J9

D106 J9
D107 O7

D108 N7
D213 E3

D214 E2
D215 F2

D243 F2
D505 K2

D510 K4
D603 O3

Q100 J9
Q101 I8

Q102 I7
Q103 K8

Q200 F1
Q201 H1

Q202 G2
Q204 F1

Q205 F2
Q500 K2

Q501 K3
Q502 J2

Q608 O3
Q609 O3

R101 I9
R109 K8

R130 O7
R131 O6

R132 O6
R133 O5

R134 O5
R135 O5

R136 O5
R137 J8

R152 J7
R153 J6

R154 J7
R155 J7

R156 I8
R157 I7

R158 K8
R160 I9

R161 K8
R162 J9

R163 J9
R164 J9

R165 I7
R167 J7

R168 I7
R169 I8

R170 K8
R171 K7

R172 K7
R173 I8

R201 H2
R207 G1

R209 G2
R213 H3

R214 H2
R215 H2

R216 H3
R217 H2

R218 H2
R221 F10

R222 F10
R223 E9

R225 E9
R226 E9

R227 H1
R228 H1

R229 G1
R230 H1

R235 G3
R236 F1

R237 F1
R238 F1

R239 F1
R240 F2

R241 F2
R244 G2

R245 F2
R247 G3

R249 F9
R250 F9

R506 J2
R509 J2

R510 J2
R511 K3

R513 K2
R514 K2

R515 K2
R516 K2

R601 N4
R602 N5

R603 N5
R604 N4

R605 N3
R607 O4

R609 O3
R610 O3

R611 M3
R612 M4

R613 M4
R614 M4

R617 M4
R623 O3

R624 N2
R625 O3

R626 O2
U100 J8

U101 K8
U102 K7

U130 O5
U200 F2

U202 H2
U203 E1

U600 O4
ZD10 J7

SET 5388 Page 1

Page 2 SET 5388

SET 5388 Page 2