Acer P221W - Page 36

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5. Power Board Functions:
Check PF801
OK ?
+19V OK ?
Check Q851
Q
852 OK?
Backlight did not shine
Replace PF801
Replace
Q851 Q852
3.3V, +5.0V
OK?
Y
Y
N
N
Y
N
N
Y
Check Q813, Q814, Q815,
ZD804, ZD805, Q803,
Q804, Q805, IC801
OK?
Replace
Q808, Q809,
T801, T802
Replace
Q813, Q814,
Q815, ZD804,
ZD805, Q803,
Q804, Q805,
IC801
Check Q808, Q809, T801,
T802, OK?
Y
N
N
Replace panel
Y
Check
F601, Q601,
R612
Replace
F601, Q601
R612,
R615,
R623
Replace IC601
Y
N
Check CN701
PIN2
(BL-ON) is HI ?
Check CN701 PIN1
(
BRT-ADJ
)
Check I/F BD
Y
Y
N
N