Sharp LC-32LE600E

LC-32/40/46LE600E/RU/S (1st Edition)
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.)
NO
Are all fluorescent LEDs on? NO Check each fluorescent LED, and change defective parts.
(RUNTKA595WJ01, RUNTKA596WJ01, RUNTKA598WJ01
,etc.)
YES
Is 3.3V supplied to pins(1) of CN7603(Driver_sub_PCB) when
the power switch is turned off?
NO Check if the peripheral circuits are short-circuited or parts are
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)"
Is UR13V supplied from pins(1) of connector
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 ⋅ ⋅ ⋅)
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)"
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.
YES
Is each control signal of CN7605 (LB) normally function?
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.
YES
Is BL_ON output to pin(2) of CN7603(Driver_sub_PCB) when
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?
NO <40LE600E/RU/S>
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?
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 ⋅ ⋅ ⋅
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)"
Check if the peripheral circuits are short-circuited or parts are
faulty.
IC7508, IC7601-7607, Q7601-7613, etc ⋅ ⋅ ⋅