5. Troubleshooting (continued)
5.3.3 Check the backlight unit:
OK
NG
Failure Point
1) The wire between Power +22V and
In22V is broken.
2) Power board failure.
OK
NG
Failure Point
1) Printed wire broke between CN301
pin 13, and I306 pin 56.
2) R301 is open.
3) I306 is failure.
Failure Point
Back light unit of LCD module is failure.
Is +22V supplied to inverter PWB?
(by the power board)
Check the BACKLIGHT_ADJ
signal of the CN301 pin 13 from I306
pin 56 is a PWM signal.
49
ACER A211H/A221HQ
Содержание A221HQV
Страница 1: ...Model ID RG215AC CAU AN02 ACER_LCD_A211H A221HQ_SM20100512V1 ...
Страница 14: ...3 Exploded Diagram 3 1 Product Exploded Diagram 12 Go to contents page ACER A211H A221HQ ...
Страница 15: ...3 Exploded Diagram continued 3 2 Packing Exploded Diagram 13 Go to contents page ACER A211H A221HQ ...