Connect the Power Plug and turn ON the main Power switch [front switch or remote switch].
In case of the Power LED blinking 1 time within a cycle
Power LED blinks 2 times
Is Power LED lighting or blinking?
|
No
|
Is the power plug connected to the wall outlet correctly?
|
No
|
Connect the power plug correctly.
|
||
Yes
|
Is all harness on board is connected correctly?
|
No
|
Connect all harness correctly.
|
|||
Yes
|
Is 24V output available at the lead of L9B1?
|
No
|
PCBA-Power is out of order.
|
|||
Yes
|
Is S3.3V output available at the cathode of D9G8?
|
No
|
Is F9G4 broken?
|
No
|
IC9B1 or peripheral circuit is out of order.
|
|
Yes
|
PD harness is removed after F9G4 is repaired. Connect the power plug again. Is the S3.3V output available at the
cathode of D9G8?
|
|||||
Yes
|
Pcba-Main is out of order
|
|||||
No
|
Is the AC_Off output available at 10 pin of PE?
|
No
|
PC9A4 or peripheral circuit is out of order.
|
|||
Yes
|
IC700 or peripheal circuit is out of order. [Pcba-main]
|
|||||
CN-1 & CN-2 harness are removed. Connect the Power Plug again and turn ON
the Main Power Switch. Is Power LED
blinking?
|
No
|
The inverter circuit of the LCD-Panel is out of order.
|
||||
Yes
|
Pcba-Power-Sub1 is out of order (only LT-3780D)
Pcba-Power-Sub 2 is out of order. (only LT-3280D)
|
Confirm the following fuses.
|
||||
F9G1
|
1.6A
|
AMPVCC[1V]
|
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
|
|
Is the voltage of 4.5V, AMOVCC[17V], P5V (Only 3280D) and
18V (Only 3780D) output available?
|
Yes
|
PD and PE harness are connected after the power plug is
removed. Is the voltaic of 4.5V and
18V output available?
|
Yes
|
The circuit of LCD panel is out of order
|
No
|
Pcba-Main is out of order.
|
