Sharp Aquos LC 26GD4U, Service Manual

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39
LC-26GD4U
TROUBLE SHOOTING TABLE
(Continued)
YES
YES
NO
YES
NO
NO
NO
YES
YES
NO
YES
YES
NO
YES
NO
NO
NO
YES
250ms 1sec
No sound or picture comes out.
No picture comes out.
Is the power LED lit up in green? Is the power LED blinking in red?
Is the AC cord normal?
Blinking once? (At regular intervals)
Blinking once?
Blinking twice?
Blinking five times?
Blinking six times?
Is the Backlight off?
To "The backlight does not go on."
Is there the clock output at pin (40) of IC4602?
Does the adjustment process menu appear? Check IC4501 and its peripheral circuits.
Check IC4701, IC4901 and their peripheral circuits.
Check the FFC (LV, SC3202, SC4601) connections between the
main PWB and LCD control PWB.
To "No picture comes out."
Table of power LED blinking timing at error occurrence
Type of error
Power supply error
Blinking once: Slow H: ON
L: OFF
H: ON
L: OFF
H: ON
L: OFF
H: ON
L: OFF
H: ON
L: OFF
Lamp error
Blinking once: Fast
Panel power supply error
Blinking twice
In-set temperature error
Blinking five times
Fan error
Blinking six times
Power LED operation (1 cycle)
To "The backlight does not go on."
Check the panel power supply circuit.
Check the temperature of the set.
Check the fan motor and its peripheral circuits.
Check the power unit, P1803, P1804 and
P1501.