Read Sharp LC-32LE600E (serv.man7) Service Manual online
LC-32/40/46LE600E/RU/S
5 – 1
LC32LE600E
Service Manual
CHAPTER 5.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
<POWER BLOCK: LC-32LE600E/RU/S>
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 (PD) when
the power switch is turned off?
the 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 (PD)
when the power switch is turned on
when the power switch is turned on
NO
Check pin(AC11) of IC3303(VCT_P) on MAIN PWB.
YES
Is the AC_DET signal sent to pin(9) of connector CN7003 (PD)
when the power switch is turned on?
when the power switch is turned on?
NO
Check the peripheral circuits,PC7007, Q7004, PC7002,etc.
YES
Is the DC voltage of approx. 400V supplied to both ends of
C7015?
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 (PD)
when the power switch is turned on?
when the 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 (PL)
when the power switch is turned on?
when the power switch is turned on?
NO
Check the peripheral circuits (U7053, etc
⋅ ⋅ ⋅)
YES
Is 144V supplied from pins(2,4,6) of CN7007(LA2) and
pins(2,4,6,8,10,12) of CN7006 (LA1) when the power switch is
turned on?
pins(2,4,6,8,10,12) of CN7006 (LA1) when the power switch is
turned on?
NO
Check the peripheral circuits,
T7501, D7501, C7501, FA5511,etc
T7501, D7501, C7501, FA5511,etc
⋅ ⋅ ⋅.
LC-32/40/46LE600E/RU/S
5 – 2
<POWER BLOCK: LC-40/46LE600E/RU/S>
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
<40LE600E/RU/S>
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
<46LE600E/RU/S>
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 (PD) when
the power switch is turned off?
the 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 (PD)
when the power switch is turned on?
when the power switch is turned on?
NO
Check pin(AC11) of IC3303(VCT_P) on MAIN PWB.
YES
Is the AC_DET signal sent to pin(9) of connector CN7501 (PD)
when the power switch is turned on?
when 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, etc.
PC7103, Q7118, Q7114 and PC7104, Q7501,Q7502, etc.
YES
Is the DC voltage of approx. 400V supplied to both ends of
C7144?
C7144?
NO
<40LE600E/RU/S>
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
<46LE600E/RU/S>
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 (PD)
when the power switch is turned on?
when the power switch is turned on?
NO
Check the peripheral circuits (T7102, D7507, C7514,7515,7516,
PC7105, PC7106, IC7503 etc...)
PC7105, PC7106, IC7503 etc...)
YES
Is PNL12V supplied from pins(1-2) of connector CN7503 (PL)
when the power switch is turned on?
when the power switch is turned on?
NO
Check the peripheral circuits (IC7502, etc
⋅ ⋅ ⋅)
YES
<40LE600E/RU/S>
Is VLED supplied to pins(1-5) of CN7606(LA1) and pins(1-5) of
CN7607(LA2) when the power switch is turned on?
Is VLED supplied to pins(1-5) of CN7606(LA1) and pins(1-5) of
CN7607(LA2) when the power switch is turned on?
NO
<40LE600E/RU/S>
Check the peripheral circuits, T7102, D7516, D7517, C7528,
L7501etc
Check the peripheral circuits, T7102, D7516, D7517, C7528,
L7501etc
⋅ ⋅ ⋅.
<46LE600E/RU/S>
Is VLED supplied to pins(1-5) of CN7606(LA1), pins(1-5) of
CN7607(LA2), pins(1-3) of CN7608(LA3) when the power switch
is turned on?
Is VLED supplied to pins(1-5) of CN7606(LA1), pins(1-5) of
CN7607(LA2), pins(1-3) of CN7608(LA3) when the power switch
is turned on?
NO
<46LE600E/RU/S>
Check the peripheral circuits, T7102, D7516, D7517, D7518,
C7528, C7538, L7501etc
Check the peripheral circuits, T7102, D7516, D7517, D7518,
C7528, C7538, L7501etc
⋅ ⋅ ⋅.
LC-32/40/46LE600E/RU/S
5 – 3
<Backlight BLOCK: LC-32LE600E/RU/S>
The backlight does not light
Is either of fluorescence LEDs off?
YES
Check each fluorescent LED, and change defective parts.
(RUNTKA595WJ01, RUNTKA598WJ01,etc.)
(RUNTKA595WJ01, RUNTKA598WJ01,etc.)
NO
Are all fluorescent LEDs on?
NO
Check each fluorescent LED, and change defective parts.
(RUNTKA595WJ01, RUNTKA598WJ01,etc.)
(RUNTKA595WJ01, RUNTKA598WJ01,etc.)
YES
Is REG3.3V supplied to pin(1) of CN7603(Driver_sub_PCB)
when the power switch is turned on?
when the power switch is turned on?
NO
Check if the peripheral circuits are short-circuited or parts are
faulty. (U7701, U7702, etc
faulty. (U7701, U7702, 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 (PD)
when the power switch is turned on?
when the 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 (LB)?
NO
Check the STB signal line on the MAIN_UNIT side (pin(2) of
P7602(LB), pin(D23) of IC3303(VCT_P), etc...)
and the peripheral circuits.
P7602(LB), pin(D23) of IC3303(VCT_P), etc...)
and the peripheral circuits.
YES
Is each control signal of CN7008(LB) 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 output to pin(2) of CN7603 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(LA2) and
pins(2,4,6,8,10,12) of CN7006(LA1) when the power switch is
turned on?
pins(2,4,6,8,10,12) of CN7006(LA1) 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-32/40/46LE600E/RU/S
5 – 4
<Backlight BLOCK: LC-40/46LE600E/RU/S>
The backlight does not light
Is either of fluorescence LEDs off?
YES
Check each fluorescent LED, and change defective parts.
(RUNTKA595WJ01, RUNTKA596WJ01, RUNTKA598WJ01
,etc.)
(RUNTKA595WJ01, RUNTKA596WJ01, RUNTKA598WJ01
,etc.)
NO
Are all fluorescent LEDs on?
NO
Check each fluorescent LED, and change defective parts.
(RUNTKA595WJ01, RUNTKA596WJ01, RUNTKA598WJ01
,etc.)
(RUNTKA595WJ01, RUNTKA596WJ01, RUNTKA598WJ01
,etc.)
YES
Is 3.3V supplied to pins(1) of CN7603(Driver_sub_PCB) when
the power switch is turned off?
the power switch is turned off?
NO
Check if the peripheral circuits are short-circuited or parts are
faulty.(U7801, U7802, etc
faulty.(U7801, U7802, 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(Driver_sub_PCB) when the power switch is turned on?
CN7604(Driver_sub_PCB) when the 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 (LB)?
NO
Check the STB signal line on the MAIN_UNIT side (pin(2) of
P9602(LB), pin(D23) of IC3303(VCT_P), etc...)
and the peripheral circuits.
P9602(LB), pin(D23) of IC3303(VCT_P), etc...)
and the peripheral circuits.
YES
Is each control signal of CN7605 (LB) 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 output to pin(2) of CN7603(Driver_sub_PCB) when
the power switch is turned on?
the power switch is turned on?
NO
Check the peripheral circuits (IC7054, etc
⋅ ⋅ ⋅)
YES
<40LE600E/RU/S>
Is VLED(187V) supplied to pins(1-5) of CN7606(LA1) and pins(1-
5) of CN7007(LA2) when the power switch is turned on?
Is VLED(187V) supplied to pins(1-5) of CN7606(LA1) and pins(1-
5) of CN7007(LA2) when the power switch is turned on?
NO
<40LE600E/RU/S>
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
⋅ ⋅ ⋅
<46LE600E/RU/S>
Is VLED(209V) supplied to pins(1-5) of CN7606(LA1), pins(1-5)
of CN7007(LA2), pins(1-3) of CN7608(LA3) when the power
switch is turned on?
Is VLED(209V) supplied to pins(1-5) of CN7606(LA1), pins(1-5)
of CN7007(LA2), pins(1-3) of CN7608(LA3) when the power
switch is turned on?
NO
<46LE600E/RU/S>
Check if the peripheral circuits are short-circuited or parts are
faulty.
T7103, D7516, D7517, D7518, C7528, C7538, L7501, C7525,
C7526 etc
Check if the peripheral circuits are short-circuited or parts are
faulty.
T7103, D7516, D7517, D7518, C7528, C7538, L7501, 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
⋅ ⋅ ⋅