Sharp LC-46LU700E (serv.man9) Service Manual ▷ View online
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 1
LC32LE700E
Service Manual
CHAPTER 6.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
<POWER BLOCK: 32 inch models>
No power supply (Front LED does not light up) and no power-up even if turned on (Front LED light up).
Is the wire harness in the unit properly connected?
NO
Reconnect and recheck the wire harness.
YES
Are F7001 and F7002 normal?
NO
Are L7004, L7001,L7002,BD7001 etc. faulty?
Check if the peripheral circuits are short-circuited.
Check if the peripheral circuits are short-circuited.
YES
Is BU+5V supplied from pin(11) of connector CN7003 when the
power switch is turned off?
power switch is turned off?
NO
Check the peripheral circuits,
IC7101, T101, C7401, C7403, PC7008, etc
IC7101, T101, C7401, C7403, PC7008, etc
⋅ ⋅ ⋅.
YES
Is the PS_ON signal sent to pin(10) of connector CN7003 when
the power switch is turned on
the power switch is turned on
NO
Check pin(59) of IC2002(UCON) on MAIN PWB.
YES
Is the AC_DET signal sent to pin(9) of connector CN7003 when
the power switch is turned on?
the power switch is turned on?
NO
Check the peripheral circuits,PC7007, Q7004, PC7002,etc.
YES
Is a DC voltage of approx. 400V applied to both ends of C7015?
NO
Does the PFC circuit normally work?
(Check IC7002, L7003, TH7001, IC7001, Q7005, Q7006etc. and
the peripheral circuits.)
(Check IC7002, L7003, TH7001, IC7001, Q7005, Q7006etc. and
the peripheral circuits.)
YES
Is UR13V supplied from pins(1-4) of connector CN7003 when the
power switch is turned on?
power switch is turned on?
NO
Check the peripheral circuits
(T7002, D7051, L7051, PC7001)
(T7002, D7051, L7051, PC7001)
YES
Is PNL12V supplied from pins(1-2) of connector CN7004 when
the power switch is turned on?
the power switch is turned on?
NO
Check the peripheral circuits (U7053, etc
⋅ ⋅ ⋅)
YES
Is 144V supplied from pins(2,4,6) of CN7007 and
pins(2,4,6,8,10,12) of CN7006 when the power switch is turned
on?
pins(2,4,6,8,10,12) of CN7006 when the power switch is turned
on?
NO
Check the peripheral circuits,
T7501, D7501, C7501, FA5511,etc
T7501, D7501, C7501, FA5511,etc
⋅ ⋅ ⋅.
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 2
<POWER BLOCK: 40/46/52 inch models>
No power supply (Front LED does not light up) and no power-up even if turned on (Front LED light up).
Is the wire harness in the unit properly connected?
NO
Reconnect and recheck the wire harness.
YES
Are F7001 and F7002 normal?
NO
<40 inch models>
Are L7001, L7002, L7003, D7101, D7103, VA7002, VA7001,
VA7003 etc... faulty?
Check if the peripheral circuits are short-circuited.
Are L7001, L7002, L7003, D7101, D7103, VA7002, VA7001,
VA7003 etc... faulty?
Check if the peripheral circuits are short-circuited.
YES
<46 inch models>
Are L7001, L7002, L7003, L7004, D7101, VA7002, VA7001,
VA7003 etc... faulty?
Check if the peripheral circuits are short-circuited.
Are L7001, L7002, L7003, L7004, D7101, VA7002, VA7001,
VA7003 etc... faulty?
Check if the peripheral circuits are short-circuited.
Is F7102 normal?
NO
Are TH7102, C7130, etc... faulty?
YES
Is BU+5V supplied from pin(11) of connector CN7501 when the
power switch is turned off?
power switch is turned off?
NO
Check the peripheral circuits (IC7102, T7101, C7510, PC7102,
PC7101, etc
PC7101, etc
⋅ ⋅ ⋅)
YES
Is the PS_ON signal sent to pin(10) of connector CN7501 when
the power switch is turned on?
the power switch is turned on?
NO
Check pin(59) of IC2002(UCON) on MAIN PWB.
YES
Is the AC_DET signal sent to pin(9) of connector CN7501 when
the power switch is turned on?
the power switch is turned on?
NO
Check the peripheral circuits such as PS_ON circuits of Q7503,
PC7103, Q7118, Q7114 and PC7104,Q7501,Q7502.
PC7103, Q7118, Q7114 and PC7104,Q7501,Q7502.
YES
Is a DC voltage of approx. 400V applied to both ends of C7144?
NO
<40 inch models>
Does the PFC circuit normally work?
(Check IC7104, L7105, TH7101, RL7101, IC7200, Q7109,
Q7110 etc... and the peripheral circuits.)
Does the PFC circuit normally work?
(Check IC7104, L7105, TH7101, RL7101, IC7200, Q7109,
Q7110 etc... and the peripheral circuits.)
YES
<46/52 inch models>
Does the PFC circuit normally work?
(Check IC7104, L7105, TH7101, RL7101, IC7101, Q7108,
Q7109 etc... and the peripheral circuits.)
Does the PFC circuit normally work?
(Check IC7104, L7105, TH7101, RL7101, IC7101, Q7108,
Q7109 etc... and the peripheral circuits.)
Is UR13V supplied from pins(1-4) of connector CN7501 when the
power switch is turned on?
power switch is turned on?
NO
Check the peripheral circuits (T7102, D7507, C7514,7515,7516,
PC7105, PC7106, IC7503etc...)
PC7105, PC7106, IC7503etc...)
YES
Is PNL12V supplied from pins(1-2) of connector CN7503 when
the power switch is turned on?
the power switch is turned on?
NO
Check the peripheral circuits (IC7502, etc
⋅ ⋅ ⋅)
YES
<40 inch models>
Is VLED supplied to pins(1-5) of CN7606 and pins(1-5) of
CN7607 when the power switch is turned on?
Is VLED supplied to pins(1-5) of CN7606 and pins(1-5) of
CN7607 when the power switch is turned on?
NO
<40 inch models>
Check the peripheral circuits, T7102, D7516, D7517, C7528,
L7501etc
Check the peripheral circuits, T7102, D7516, D7517, C7528,
L7501etc
⋅ ⋅ ⋅.
<46/52 inch models>
Is VLED supplied to pins(1-5) of CN7606, pins(1-5) of
CN7607,pins(1-3) of CN7608 when the power switch is turned
on?
Is VLED supplied to pins(1-5) of CN7606, pins(1-5) of
CN7607,pins(1-3) of CN7608 when the power switch is turned
on?
NO
<46/52 inch models>
Check the peripheral circuits, T7102, D7516, D7517, D7518,
C7528, C7538, L7501etc
Check the peripheral circuits, T7102, D7516, D7517, D7518,
C7528, C7538, L7501etc
⋅ ⋅ ⋅.
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 3
<Backlight BLOCK: 32 inch models>
The backlight does not light
Does a part of the LED lamp shine?
YES
Check each LED lamp, and replace if defective.
RUNTKA595WJ01/02, RUNTKA598WJ01/02
RUNTKA595WJ01/02, RUNTKA598WJ01/02
NO
Is REG3.3V supplied to pin of IC7054 when the power switch is
turned on?
turned on?
NO
Check if the peripheral circuits are short-circuited or parts are
faulty. (U7401, etc
faulty. (U7401, etc
⋅ ⋅ ⋅)
YES
YES
Refer to "No power supply (Front LED does not light up)" and
"No power-up even if turned on (Front LED light up)"
"No power-up even if turned on (Front LED light up)"
Is UR13V supplied from pins(1-4) of connector CN7003 when the
power switch is turned on?
power switch is turned on?
NO
Check the peripheral circuits
(T7002, D7501, L7501, PC7001)
(T7002, D7501, L7501, PC7001)
YES
YES
Refer to "No power supply (Front LED does not light up)" and
"No power-up even if turned on (Front LED light up)"
"No power-up even if turned on (Front LED light up)"
Is the STB_ON/OFF signal supplied from pin(8) of CN7008?
NO
Check the STB signal line on the MAIN_UNIT side (P9602,
pin(49) of IC2002,IC2007,AH3 of IC3302, etc
pin(49) of IC2002,IC2007,AH3 of IC3302, etc
⋅ ⋅ ⋅)
and the peripheral circuits.
YES
Is each control signal of CN7008 normally function?
Pin(7) OFL (PWM light control signal input)
Pin(6) ERR (Error output)
Pin(7) OFL (PWM light control signal input)
Pin(6) ERR (Error output)
NO
Check each control circuit.
YES
Is [LAMP_ERROR] indicated with [5] in a process mode?
NO
[LAMP_ERROR] is returned to the default value in a process
mode.
mode.
YES
Is BL_ON supplied from pin of IC7054 when the power switch is
turned on?
turned on?
NO
Check the peripheral circuits (IC7054, etc
⋅ ⋅ ⋅)
YES
Is 144V supplied to pins(2,4,6) of CN7007 and
pins(2,4,6,8,10,12) of CN7006 when the power switch is turned
on?
pins(2,4,6,8,10,12) of CN7006 when the power switch is turned
on?
NO
Check if the peripheral circuits are short-circuited or parts are
faulty.
IC7251,PC7004, PC7006, T7501, D7501, C7501, FA5511,etc
faulty.
IC7251,PC7004, PC7006, T7501, D7501, C7501, FA5511,etc
⋅ ⋅ ⋅
YES
YES
Refer to "No power supply (Front LED does not light up)" and
"No power-up even if turned on (Front LED light up)"
"No power-up even if turned on (Front LED light up)"
Check if the peripheral circuits are short-circuited or parts are
faulty.
U7651, U7502, U7601-7605, Q7501-7509, Q7601-7609
faulty.
U7651, U7502, U7601-7605, Q7501-7509, Q7601-7609
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 4
<Backlight BLOCK: LC-40/46/52 inch models>
The backlight does not light
Does a part of the LED lamp shine?
YES
Check each LED lamp, and replace if defective.
RUNTKA595WJ01/02, RUNTKA596WJ01/02,
RUNTKA598WJ01/02
RUNTKA595WJ01/02, RUNTKA596WJ01/02,
RUNTKA598WJ01/02
NO
Is 3.3V supplied to pins(1) of CN7603 when the power switch is
turned off?
turned off?
NO
Check if the peripheral circuits are short-circuited or parts are
faulty.(IC7506, etc
faulty.(IC7506, etc
⋅ ⋅ ⋅)
YES
YES
Refer to "No power supply (Front LED does not light up)" and
"No power-up even if turned on (Front LED light up)"
"No power-up even if turned on (Front LED light up)"
Is UR13V supplied from pins(1) of connector CN7604 when the
power switch is turned on?
power switch is turned on?
NO
Check if the peripheral circuits are short-circuited or parts are
faulty.
(T7102, D7507, C7514,7515,7516, PC7105, PC7106,
IC7505etc
faulty.
(T7102, D7507, C7514,7515,7516, PC7105, PC7106,
IC7505etc
⋅ ⋅ ⋅)
YES
YES
Refer to "No power supply (Front LED does not light up)" and
"No power-up even if turned on (Front LED light up)"
"No power-up even if turned on (Front LED light up)"
Is the STB_ON/OFF signal supplied from pin(8) of CN7605?
NO
Check the STB signal line on the MAIN_UNIT side (P9602,
pin(49) of IC2002,IC2007,AH3 of IC3302, etc
pin(49) of IC2002,IC2007,AH3 of IC3302, etc
⋅ ⋅ ⋅)
and the peripheral circuits.
YES
Is each control signal of CN7605 normally function?
Pin(7) OFL (PWM light control signal input)
Pin(6) ERR (Error output)
Pin(7) OFL (PWM light control signal input)
Pin(6) ERR (Error output)
NO
Check each control circuit.
YES
Is [LAMP_ERROR] indicated with [5] in a process mode?
NO
[LAMP_ERROR] is returned to the default value in a process
mode.
mode.
YES
Is BL_ON supplied from pins(2) of CN7603 when the power
switch is turned on?
switch is turned on?
NO
Check the peripheral circuits (IC7054, etc
⋅ ⋅ ⋅)
YES
<40 inch models>
Is VLED supplied to pins(1-5) of CN7606 and pins(1-5) of
CN7607 when the power switch is turned on?
Is VLED supplied to pins(1-5) of CN7606 and pins(1-5) of
CN7607 when the power switch is turned on?
NO
<40 inch models>
Check if the peripheral circuits are short-circuited or parts are
faulty.
T7102, D7516, D7517, C7528, L7501, D7525etc
Check if the peripheral circuits are short-circuited or parts are
faulty.
T7102, D7516, D7517, C7528, L7501, D7525etc
⋅ ⋅ ⋅
<46/52 inch models>
Is VLED supplied to pins(1-5) of CN7606, pins(1-5) of
CN7607,pins(1-3) of CN7608 when the power switch is turned
on?
Is VLED supplied to pins(1-5) of CN7606, pins(1-5) of
CN7607,pins(1-3) of CN7608 when the power switch is turned
on?
NO
<46/52 inch models>
Check if the peripheral circuits are short-circuited or parts are
faulty.
T7102, D7516, D7517, D7518, C7528, C7538, L7501, D7518,
C7525, C7526 etc
Check if the peripheral circuits are short-circuited or parts are
faulty.
T7102, D7516, D7517, D7518, C7528, C7538, L7501, D7518,
C7525, C7526 etc
⋅ ⋅ ⋅
YES
YES
Refer to "No power supply (Front LED does not light up)" and
"No power-up even if turned on (Front LED light up)"
"No power-up even if turned on (Front LED light up)"
Check if the peripheral circuits are short-circuited or parts are
faulty.
IC7508, IC7601-7607, Q7601-7613, etc
faulty.
IC7508, IC7601-7607, Q7601-7613, etc
⋅ ⋅ ⋅