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LC-46SE941U-R/G LC-52SE941U-R/G
LC-46/52SE941U-R/G
SERVICE MANUAL
No. S48J2LC46SE94
LCD COLOR TELEVISION
LC-46SE941U-R
LC-46SE941U-G
LC-52SE941U-R
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the set should
be restored to its original condition and only parts identical to those specified should be used.
LC-52SE941U-G
OUTLINE
This model is based on the LC-46/52SE941U and is changed some parts. This Service Manual covers the modifications alone. For the other points, refer to the LC-46SE941U (No. S18D1LC46SE94) and LC-52SE941U (No.
SX7A6LC65SE94) Service Manual.
• The stand (ST52SE94) and speakers (SP46SE94) for Model LC-46SE941U-R/G are separately sold.
• The stand (ST52SE94) and speakers (SP52SE94) for Model LC-52SE941U-R/G are separately sold.
CONTENTS
OUTLINE AND DIFFERENCES FROM BASE MODEL
OUTLINE.................................................................... i
LIST OF CHANGED PARTS
(LC-46SE941U-R/G) .................................................. i
LIST OF CHANGED PARTS
(LC-52SE941U-R/G) ................................................ iv
SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY
PRECAUTION.......................................................... vi
PRECAUTIONS A PRENDRE LORS DE LA
REPARATION ..........................................................vii
PRECAUTIONS FOR USING LEAD-FREE
SOLDER .................................................................viii
PRECAUTIONS IN SERVICING THE HDCP-
KEY ROM................................................................. ix
Parts Guide
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LC-46/52SE941U-R/G
i
LC-46/52SE941U-R/G
Service Manual
OUTLINE AND DIFFERENCES FROM BASE MODEL
OUTLINE
This model is based on the LC-46/52SE941U and is changed some parts. This Service Manual covers the modifications alone. For the other points,
refer to the LC-46SE941U (No. S18D1LC46SE94) and LC-52SE941U (No. SX7A6LC65SE94) Service Manual.
• The stand (ST52SE94) and speakers (SP46SE94) for Model LC-46SE941U-R/G are separately sold.
• The stand (ST52SE94) and speakers (SP52SE94) for Model LC-52SE941U-R/G are separately sold.
LIST OF CHANGED PARTS (LC-46SE941U-R/G)
Ref. No. Description
LC-46SE941U
(No. S18D1LC46SE94)
LC-46SE941U-R/G
(No. S48J2LC46SE94)
Note
PRINTED WIRING BOARD ASSEMBLIES
SPEAKER-L Unit DUNTKD744WE01 ← Some parts changed
SPEAKER-R Unit DUNTKD745WE01 ← Some parts changed
TERMINAL Unit DUNTKE208FM02 ← Some parts changed
R/C, LED Unit DUNTKE264FM11 ← Some parts changed
KEY Unit DUNTKE266FM02 ← —
MAIN Unit DUNTKE421FM02 DKEYME421FM04 Some parts changed
SIDE Unit DUNTKE488FM04 ← —
POWER Unit RDENCA235WJQZ ← —
AC INLET Unit RUNTKA317WJQZ ← —
LCD PANEL
LCD Panel Module Unit R1LK460D3LZ70Z ← —
SPEAKER-L Unit
J201 Jack QTANAA008WJZZ QTANAA013WJZZ Change
SPEAKER-R Unit
J202 Jack QTANAA008WJZZ QTANAA013WJZZ Change
TERMINAL Unit
C539 Capacitor VCKYCY1EF104ZY — Delete
C543 Capacitor VCKYCY1EF104ZY — Delete
C547 Capacitor VCAAPF1CJ396MY — Delete
R/C, LED Unit
Q102 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q103 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q104 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q106 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q107 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
MAIN Unit
IC1604 IC VHiSii9185+-1Q VHiSii9185A-1Q Change
R1302 Resistor VRK-SB1FF223JY VRS-CG1JF223JY Change
R1413 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8151 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8152 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8153 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8154 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8155 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8156 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8157 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8158 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8159 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8160 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8161 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8162 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
LC-46/52SE941U-R/G
ii
R8169 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8170 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8171 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8172 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8173 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8174 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8175 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8176 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8177 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8178 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8179 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8180 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8186 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8187 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8188 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8189 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8190 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8191 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8192 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8193 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8194 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8195 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8196 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8197 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8198 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8199 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8200 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8201 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8202 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8203 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8204 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8205 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8206 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8207 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8208 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8209 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8210 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8211 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8212 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8213 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8214 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8228 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8230 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8231 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8232 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8233 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8234 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8235 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8236 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8237 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8238 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8239 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8240 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8241 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8242 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8243 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8244 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8255 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8257 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8258 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8259 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8260 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8261 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8262 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
Ref. No. Description
LC-46SE941U
(No. S18D1LC46SE94)
LC-46SE941U-R/G
(No. S48J2LC46SE94)
Note
LC-46/52SE941U-R/G
iii
R8263 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8264 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8265 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8266 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8268 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8269 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
N Cool Sheet PSPAZB775WJKZ PSPAZB774WJKZ Change
CABINET AND MECHANICAL PARTS
Please refer to a Parts list
PACKING PARTS AND ACCESSORIES
Please refer to a Parts list
Ref. No. Description
LC-46SE941U
(No. S18D1LC46SE94)
LC-46SE941U-R/G
(No. S48J2LC46SE94)
Note
LC-46/52SE941U-R/G
iv
LIST OF CHANGED PARTS (LC-52SE941U-R/G)
Ref. No. Description
LC-52SE941U
(No. SX7A6LC65SE94)
LC-52SE941U-R/G
(No. S48J2LC46SE94)
Note
PRINTED WIRING BOARD ASSEMBLIES
SPEAKER-L Unit DUNTKD744WE01 ← Some parts changed
SPEAKER-R Unit DUNTKD745WE01 ← Some parts changed
TERMINAL Unit DUNTKE208FM02 ← Some parts changed
R/C, LED Unit DUNTKE264FM11 ← Some parts changed
KEY Unit DUNTKE266FM02 ← —
MAIN Unit DUNTKE421FM01 DKEYME421FM03 Some parts changed
SIDE Unit DUNTKE488FM04 ← —
POWER Unit RDENCA235WJQZ ← —
AC INLET Unit RUNTKA317WJQZ ← —
LCD PANEL
LCD Panel Module Unit R1LK520D3LZ70Z ← —
SPEAKER-L Unit
J201 Jack QTANAA008WJZZ QTANAA013WJZZ Change
SPEAKER-R Unit
J202 Jack QTANAA008WJZZ QTANAA013WJZZ Change
TERMINAL Unit
C539 Capacitor VCKYCY1EF104ZY — Delete
C543 Capacitor VCKYCY1EF104ZY — Delete
C547 Capacitor VCAAPF1CJ396MY — Delete
R/C, LED Unit
Q102 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q103 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q104 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q106 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
Q107 Transistor VS2SC3928AR-1Y VSKTC3875SG-1Y Change
MAIN Unit
IC1604 IC VHiSii9185+-1Q VHiSii9185A-1Q Change
R1302 Resistor VRK-SB1FF223JY VRS-CG1JF223JY Change
R1413 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8151 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8152 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8153 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8154 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8155 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8156 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8157 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8158 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8159 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8160 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8161 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8162 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8169 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8170 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8171 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8172 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8173 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8174 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8175 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8176 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8177 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8178 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8179 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8180 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8186 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8187 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
LC-46/52SE941U-R/G
v
R8188 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8189 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8190 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8191 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8192 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8193 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8194 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8195 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8196 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8197 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8198 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8199 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8200 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8201 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8202 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8203 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8204 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8205 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8206 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8207 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8208 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8209 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8210 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8211 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8212 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8213 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8214 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8228 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8230 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8231 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8232 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8233 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8234 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8235 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8236 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8237 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8238 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8239 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8240 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8241 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8242 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8243 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8244 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8255 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8257 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8258 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8259 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8260 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8261 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8262 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8263 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8264 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8265 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8266 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
R8268 Resistor VRK-SB1FF680JY VRS-CG1JF680JY Change
R8269 Resistor VRK-SB1FF220JY VRS-CG1JF220JY Change
CABINET AND MECHANICAL PARTS
Please refer to a Parts list
PACKING PARTS AND ACCESSORIES
Please refer to a Parts list
Ref. No. Description
LC-52SE941U
(No. SX7A6LC65SE94)
LC-52SE941U-R/G
(No. S48J2LC46SE94)
Note
LC-46/52SE941U-R/G
vi
LC-46/52SE941U-R/G
Service Manual
SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY PRECAUTION
WARNING
1. For continued safety, no modification of any circuit should be
attempted.
2. Disconnect AC power before servicing.
BEFORE RETURNING THE RECEIVER (Fire &
Shock Hazard)
Before returning the receiver to the user, perform the following
safety checks:
3. Inspect all lead dress to make certain that leads are not pinched,
and check that hardware is not lodged between the chassis and
other metal parts in the receiver.
4. Inspect all protective devices such as non-metallic control knobs,
insulation materials, cabinet backs, adjustment and compartment
covers or shields, isolation resistor-capacitor networks, mechanical
insulators, etc.
5. To be sure that no shock hazard exists, check for leakage current in
the following manner.
• Plug the AC cord directly into a 110-240 volt 50/60Hz AC outlet.
• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.
• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.
• Connect the resistor connection to all exposed metal parts having a
return to the chassis (antenna, metal cabinet, screw heads, knobs
and control shafts, escutcheon, etc.) and measure the AC voltage
drop across the resistor.
All checks must be repeated with the AC cord plug connection
reversed. (If necessary, a nonpolarized adaptor plug must be used
only for the purpose of completing these checks.)
Any reading of 0.75 Vrms (this corresponds to 0.5 mA rms AC.) or
more is excessive and indicates a potential shock hazard which
must be corrected before returning the monitor to the owner.
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
SAFETY NOTICE
Many electrical and mechanical parts in LCD color television have
special safety-related characteristics.
These characteristics are often not evident from visual inspection, nor
can protection afforded by them be necessarily increased by using
replacement components rated for higher voltage, wattage, etc.
Replacement parts which have these special safety characteristics are
identified in this manual; electrical components having such features
are identified by " " and shaded areas in the Replacement Parts List
and Schematic Diagrams.
For continued protection, replacement parts must be identical to those
used in the original circuit.
The use of a substitute replacement parts which do not have the same
safety characteristics as the factory recommended replacement parts
shown in this service manual, may create shock, fire or other hazards.
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the
servicing guidelines which follow:
CAUTION: FOR CONTI N U E D PROTECTION
AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
F7000 (250V 6.3A)
DVM
AC SCALE
1.5k ohm
10W
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
0.15µF
TEST PROBE
LC-46/52SE941U-R/G
vii
PRECAUTIONS A PRENDRE LORS DE LA REPARATION
De nombreuses pièces, électriques et mécaniques, dans les téléviseur ACL présentent des caractéristiques spéciales relatives à la sécurité, qui ne sont souvent pas évidentes à vue. Le degré de protection ne peut pas être nécessairement augmentée en utilisant des
pièces de remplacement étalonnées pour haute tension, puissance,
etc.
Les pièces de remplacement qui présentent ces caractéristiques sont
identifiées dans ce manuel; les pièces électriques qui présentent ces
particularités sont identifiées par la marque " " et hachurées dans la
liste des pièces de remplacement et les diagrammes schématiques.
Pour assurer la protection, ces pièces doivent être identiques à celles
utilisées dans le circuit d'origine. L'utilisation de pièces qui n'ont pas
les mêmes caractéristiques que les pièces recommandées par l'usine,
indiquées dans ce manuel, peut provoquer des électrocutions, incendies, radiations X ou autres accidents.
AVERTISSEMENT
1.
2.
3.
4.
5.
•
•
•
•
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux
conseils suivants.
N'entreprendre aucune modification de tout circuit. C'est dangereux.
Débrancher le récepteur avant toute réparation.
Inspecter tous les faisceaux de câbles pour s'assurer que les fils
ne soient pas pincés ou qu'un outil ne soit pas placé entre le châssis et les autres pièces métalliques du récepteur.
Inspecter tous les dispositifs de protection comme les boutons de
commande non-métalliques, les isolants, le dos du coffret, les couvercles ou blindages de réglage et de compartiment, les réseaux
de résistancecapacité, les isolateurs mécaniques, etc.
S'assurer qu'il n'y ait pas de danger d'électrocution en vérifiant la
fuite de courant, de la facon suivante:
Brancher le cordon d'alimentation directem-ent à une prise de courant de 110-240V 50/60Hz. (Ne pas utiliser de transformateur
d'isolation pour cet essai).
A l'aide de deux fils à pinces, brancher une résistance de 1.5 kΩ
10 watts en parallèle avec un condensateur de 0.15µF en série
avec toutes les pièces métalliques exposées du coffret et une terre
connue comme une conduite électrique ou une prise de terre
branchée à la terre.
Utiliser un voltmètre CA d'une sensibilité d'au moins 5000Ω/V pour
mesurer la chute de tension en travers de la résistance.
Toucher avec la sonde d'essai les pièces métalliques exposées qui
présentent une voie de retour au châssis (antenne, coffret métallique, tête des vis, arbres de commande et des boutons, écusson,
etc.) et mesurer la chute de tension CA en-travers de la résistance.
Toutes les vérifications doivent être refaites après avoir inversé la
fiche du cordon d'alimentation. (Si nécessaire, une prise
d'adpatation non polarisée peut être utilisée dans le but de terminer ces vérifications.)
La tension de pointe mesurèe ne doit pas dépasser 0.75V (correspondante au courant CA de pointe de 0.5mA).
Dans le cas contraire, il y a une possibilité de choc électrique qui
doit être supprimée avant de rendre le récepteur au client.
PRECAUTION: POUR LA PROTECTION CONTINUE CONTRE LES RISQUES D'INCENDIE,
REMPLACER LE FUSIBLE
VERIFICATIONS CONTRE L'INCEN-DIE ET LE
CHOC ELECTRIQUE
Avant de rendre le récepteur à l'utilisateur, effectuer les vérifications suivantes.
DVM
ECHELLE CA
1.5k ohm
10W
0.15
µ
F
SONDE D'ESSAI
AUX PIECES
METALLIQUES
EXPOSEES
BRANCHER A UNE
TERRE CONNUE
AVIS POUR LA SECURITE
F7000 (250V 6.3A)
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