Sharp LC-26GA3E Service Manual page 43

TROUBLE SHOOTING TABLE
Is the power LED lit up in green?
YES
Is the Backlight off?
YES
To "The backlight does not go on."
Is there the clock output at pin (40) of IC4602?
Does the adjustment process menu appear?
YES
Check IC4701, IC4901 and their peripheral circuits.
No sound or picture comes out.
NO
Is the power LED blinking in red?
YES
Blinking once? (At regular intervals)
NO
Blinking once?
NO
Blinking twice?
NO
Blinking five times?
NO
Blinking six times?
NO
Blinking seven times?
NO
To "No picture comes out."
Table of power LED blinking timing at error occurrence
Type of error
Power supply error H: ON
Blinking once: Slow L: OFF
Lamp error
H: ON
Blinking once: Fast
L: OFF
Panel power supply error
H: ON
Blinking twice
L: OFF
In-set temperature error H: ON
Blinking five times L: OFF
Fan error
H: ON
Blinking six times
L: OFF
1-Bit amp. error
H: ON
Blinking seven times
L: OFF
No picture comes out.
NO
Check the FFC (LV, SC3200, SC4601) connections between the
main PWB and LCD control PWB.
NO
Check IC4501 and its peripheral circuits.
43
(Continued)
NO
Check the power unit.
YES
Check the power unit.
CCKM and D5V line are not defective.
YES
To "The backlight does not go on."
YES
Check the panel power supply circuit.
YES
Check the temperature of the set.
YES
Check the fan motor and its peripheral circuits.
YES
Check the temperature of the 1-bit amplifier
unit.
250ms 1sec
Power LED operation (1 cycle)
LC-26GA3E