Service manual

Page 36
MODELS: LT-3280D/LT-3780D
☆Short1 mode: The POWER-LED blinking is 1 time within a cycle.
NO
Pcba-POWER-SUB1 is out of order.(Only LT-3780D)
Pcba-POWER-SUB2 is out of order.(Only LT-3280D)
YES
The inverter circuit of LCD- panel is out of order.
CN1 and CN2 harness are removed.
Connect the Power plug again and turn on the main Power switch
(Front switch or remote switch).
Is the POWER-LED still blinking?
☆Short2 mode: The POWER-LED blinking is 2 times within a cycle.
Pcba-MAIN is out of order.
YES
Confirm the following fuses. Repair the broken fuse.
Parts No. Rated value Output Measurement part
F9G5 1.6A AMPVCC(17V) Cathode of D9H5.
F9G6 1A P5V(only 32”) Cathode of D9J9.
F9G7 4A 18V(only 37”) Cathode of D9J2.
F9G8 0.5A 4.5V Cathode of D9H5.
PD and PE harness are removed after the broken fuse is repaired.
Connect the power plug again.
Is the voltage of 4.5V, AMPVCC(17V),P5V(only LT-3280D) and 18V(only LT-
3780D) output available?
Pcba-POWER is out of order.
NO
PD and PE harness are connected after the power plug is
removed.
CNF1(only32") or CNF2(only37") harness is removed.
Connect the power plug again and turn on the main
Power switch (Front switch or remote switch).
Is the voltage of 4.5V, AMPVCC(17V),P5V(only LT-
3280D) and 18V(only LT-3780D) output available?
The circuit of LCD-panel is
out of order.
YES
NO
(A) In case of the POWER-LED blinking. (A) In case of the POWER-LED blinking.
(A) In case of the POWER-LED blinking. (A) In case of the POWER-LED blinking.
(A) In case of the POWER-LED blinking.