Trouble Shooting For No Picture - Acer 7299sl Service Manual

11 Asynchronization
12 Asynchronization
13 Spot when power OFF
14 Hor. size too small
15 Ver. size too small
16 Appear retrace line
17 Geometry cannot be
adjusted
18 ABL cannot be adjusted
19 Tilt cannot be adjusted
20 Upper left and right picture
distortion

4.4 Trouble shooting for no picture

Trouble Shooting
AFC feedback failure
Defelction IC failure
Spot killer circuit failure
H-size VR had not been
adjusted
Ver. output abnormal
V-blanking failure
MCU or defection circuit
failure
ABL circuit failure
Tilt circuit or MCU failure IC401,Q411,Q412
H-size RLC filter failure
No
Abnormal
0 Vp-p output
Check
OSD and
video amplifier
output
Figure.3 Trouble shooting for no picture
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IC304
IC304,C355,C354,R39
22,C356,C353,C352
Q256,Q253,ZD305,ZD
306
Adjust VR301
R207,R216, IC304
IC201,Q254,Q255
IC801,IC304
Q301,Q318
L304,R363,C332
No picture
Start
Connect
to signal
Yes
Blanking
About -175V
G1
voltage
Normal
Adjustable -40~-30V
Cathode
voltage
Normal
Adjustable 0 - 55Vp-p
Abnormal
G2
Voltage
Normal
End
API Confidential
Check
MCU
Check
high voltage
generation
circuit
4-3