Service manual

MODELS: LT-3280D/LT-3780D
Page 37
Is the back-light on?
YES
NO
Confirms that the BLON voltage
of PE (Pin5).
Is the voltage of BLON more than
2V?
NO
IC400 and peripheral circuits
are out of order. (PWB-MAIN)
YES
Is the following harness connected?
CN1,CN2,CNF2
（only37”）,PC,PE
YES
NO
Connect the harness correctly.
Inverter circuit or back-light of LCD-
panel are out of order.
Skip to “2. No picture
displayed and picture
errors.”
(B) In case of the POWER-LED lighting (B) In case of the POWER-LED lighting
(B) In case of the POWER-LED lighting (B) In case of the POWER-LED lighting
(B) In case of the POWER-LED lighting