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.
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 |
|
|
Printed in the United States of America 5 4 3 2 1 |
08FP06006 |
!IBCGC|05388X |
Page 1 SET 5388 |
|
5388
SET 5388
MODEL 32LC7D (CHASSIS LA73E)
LG
5388
LCD SERIESERIES |
Technical Service Data |
LG |
|
|
MODEL 32LC7D (CHASSIS LA73E) |
INDEX |
|
GridTrace Location |
|
Power Supply .................................... |
1 |
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 |
|
Power Supply Schematic ................... |
2 |
THIS IS A GREEN PRODUCT
Do not use lead based solder for repair. Use only green product parts for replacement.
For a Complete List of Manuals,
Visit www.samswebsite.com
|
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
JULY 2008 SET 5388
5388
Page 1 SET 5388
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 |
- |
- |
PARTS LIST
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 |
|
|
|
|
|
|
|
SET 5388 Page 1 |
|||
|
|
|
|
||||||||
|
POWER SUPPLY BOARD TOP, GRIDTRACE LOCATION GUIDE |
|
|
||||||||
|
BD10 |
M5 |
C212 |
B8 |
D205 |
E2 |
P201 |
A9 |
R502 |
J8 |
|
|
C100 |
O2 |
C213 |
C9 |
D207 |
C7 |
P202 |
D1 |
R512 |
K7 |
|
|
C102 |
L4 |
C215 |
D8 |
D209 |
D7 |
P203 |
D9 |
R615 |
L8 |
|
|
C103 |
L1 |
C216 |
D8 |
D501 |
I7 |
PC10 |
I9 |
SC10 |
O2 |
|
|
C104 |
P4 |
C219 |
D8 |
D502 |
K8 |
PC13 |
I1 |
T101 |
F4 |
|
|
C105 |
O4 |
C220 |
G9 |
D503 |
J9 |
PC15 |
G2 |
T150 |
K2 |
|
|
C106 |
P4 |
C221 |
B3 |
D601 |
L7 |
PC50 |
I9 |
T501 |
I8 |
|
|
C107 |
N1 |
C222 |
A3 |
D602 |
L9 |
Q150 |
I2 |
TH60 |
L5 |
|
|
C108 |
K1 |
C223 |
D3 |
F100 |
P3 |
Q151 |
H2 |
TH60 |
L5 |
|
|
C110 |
H4 |
C225 |
E9 |
FB101 |
H3 |
Q207 |
E7 |
U500 |
J7 |
|
|
C123 |
I3 |
C232 |
C4 |
FB501 |
J8 |
Q606 |
M9 |
U502 |
K9 |
|
|
C150 |
J4 |
C501 |
I6 |
FB601 |
L8 |
R100 |
N1 |
VA100 |
N2 |
|
|
C151 |
I4 |
C502 |
K9 |
FR50 |
J6 |
R102 |
N2 |
ZD20 |
K9 |
|
|
C201 |
D3 |
C506 |
J9 |
L200 |
E8 |
R151 |
H3 |
ZD50 |
K8 |
|
|
C203 |
B4 |
C507 |
K8 |
L202 |
G9 |
R202 |
H7 |
ZD50 |
K7 |
|
|
C204 |
H8 |
C508 |
K7 |
L203 |
D9 |
R206 |
E7 |
|
|
|
|
C205 |
G8 |
C509 |
I7 |
L204 |
C9 |
R208 |
D5 |
|
|
|
|
C206 |
C6 |
C600 |
L7 |
L205 |
B9 |
R210 |
D4 |
|
|
|
|
C207 |
A8 |
C612 |
M8 |
L206 |
B4 |
R211 |
D2 |
|
|
|
|
C208 |
A9 |
D202 |
G7 |
L600 |
O8 |
R253 |
A4 |
|
|
|
|
C210 |
D6 |
D203 |
B2 |
LF101 |
M2 |
R254 |
A4 |
|
|
|
|
C211 |
G8 |
D204 |
B7 |
LF102 |
M4 |
R501 |
I6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
POWER SUPPLY BOARD BOTTOM
|
|
|||||||||||||
POWER SUPPLY BOARD BOTTOM, GRIDTRACE LOCATION GUIDE |
||||||||||||||
C111 |
J7 |
|
C605 |
O3 |
|
R101 |
I9 |
|
R209 |
G2 |
|
R513 |
K2 |
|
|
|
|
|
|
||||||||||
C113 |
J8 |
|
C606 |
N4 |
|
R109 |
K8 |
|
R213 |
H3 |
|
R514 |
K2 |
|
C114 |
K8 |
|
C610 |
O4 |
|
R130 |
O7 |
|
R214 |
H2 |
|
R515 |
K2 |
|
C115 |
K9 |
|
D100 |
K7 |
|
R131 |
O6 |
|
R215 |
H2 |
|
R516 |
K2 |
|
C116 |
J9 |
|
D101 |
J8 |
|
R132 |
O6 |
|
R216 |
H3 |
|
R601 |
N4 |
|
C117 |
J9 |
|
D102 |
K8 |
|
R133 |
O5 |
|
R217 |
H2 |
|
R602 |
N5 |
|
C118 |
J7 |
|
D104 |
H9 |
|
R134 |
O5 |
|
R218 |
H2 |
|
R603 |
N5 |
|
C119 |
J8 |
|
D105 |
J9 |
|
R135 |
O5 |
|
R221 |
F10 |
|
R604 |
N4 |
|
C120 |
K7 |
|
D106 |
J9 |
|
R136 |
O5 |
|
R222 |
F10 |
|
R605 |
N3 |
|
C121 |
I7 |
|
D107 |
O7 |
|
R137 |
J8 |
|
R223 |
E9 |
|
R607 |
O4 |
|
C122 |
I8 |
|
D108 |
N7 |
|
R152 |
J7 |
|
R225 |
E9 |
|
R609 |
O3 |
|
C124 |
I8 |
|
D213 |
E3 |
|
R153 |
J6 |
|
R226 |
E9 |
|
R610 |
O3 |
|
C125 |
O6 |
|
D214 |
E2 |
|
R154 |
J7 |
|
R227 |
H1 |
|
R611 |
M3 |
|
C126 |
O5 |
|
D215 |
F2 |
|
R155 |
J7 |
|
R228 |
H1 |
|
R612 |
M4 |
|
C127 |
O5 |
|
D243 |
F2 |
|
R156 |
I8 |
|
R229 |
G1 |
|
R613 |
M4 |
|
C128 |
K9 |
|
D505 |
K2 |
|
R157 |
I7 |
|
R230 |
H1 |
|
R614 |
M4 |
|
C209 |
G1 |
|
D510 |
K4 |
|
R158 |
K8 |
|
R235 |
G3 |
|
R617 |
M4 |
|
C214 |
H2 |
|
D603 |
O3 |
|
R160 |
I9 |
|
R236 |
F1 |
|
R623 |
O3 |
|
C217 |
H1 |
|
Q100 |
J9 |
|
R161 |
K8 |
|
R237 |
F1 |
|
R624 |
N2 |
|
C218 |
G1 |
|
Q101 |
I8 |
|
R162 |
J9 |
|
R238 |
F1 |
|
R625 |
O3 |
|
C224 |
F2 |
|
Q102 |
I7 |
|
R163 |
J9 |
|
R239 |
F1 |
|
R626 |
O2 |
|
C226 |
F3 |
|
Q103 |
K8 |
|
R164 |
J9 |
|
R240 |
F2 |
|
U100 |
J8 |
|
C227 |
F1 |
|
Q200 |
F1 |
|
R165 |
I7 |
|
R241 |
F2 |
|
U101 |
K8 |
|
C228 |
F3 |
|
Q201 |
H1 |
|
R167 |
J7 |
|
R244 |
G2 |
|
U102 |
K7 |
|
C229 |
G2 |
|
Q202 |
G2 |
|
R168 |
I7 |
|
R245 |
F2 |
|
U130 |
O5 |
|
C230 |
F2 |
|
Q204 |
F1 |
|
R169 |
I8 |
|
R247 |
G3 |
|
U200 |
F2 |
|
C256 |
E1 |
|
Q205 |
F2 |
|
R170 |
K8 |
|
R249 |
F9 |
|
U202 |
H2 |
|
C503 |
K4 |
|
Q500 |
K2 |
|
R171 |
K7 |
|
R250 |
F9 |
|
U203 |
E1 |
|
C505 |
K4 |
|
Q501 |
K3 |
|
R172 |
K7 |
|
R506 |
J2 |
|
U600 |
O4 |
|
C602 |
N4 |
|
Q502 |
J2 |
|
R173 |
I8 |
|
R509 |
J2 |
|
ZD10 |
J7 |
|
C603 |
N3 |
|
Q608 |
O3 |
|
R201 |
H2 |
|
R510 |
J2 |
|
|
|
|
C604 |
O3 |
|
Q609 |
O3 |
|
R207 |
G1 |
|
R511 |
K3 |
|
|
|
|
SET 5388 Page 1
Page 2 SET 5388
SET 5388 Page 2
Loading...