Specifications

17" CDT Color Monitor AOC FT720
22
6-9 Power Supply Trouble Shooting Chart
BEFORE CHECK SW.REG. PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM
POWER SUPPLY OUTPUT: (A) VARIABLE OUTPUT : 58V - 180V
(DEPENDING EPENDING UPON H.SYNC FREQUENCY)
(B) CONSTANT OUTPUT : 6.3V, 14.5V, -12V, 80V
BEAD SET
ABNORMAL VARIABLE OUTPUT
N
G
O
K
N
G
O
K
O
K
N
G
NG
N
G
O
K
O
K
O
K
N
G
O
K
N
G
YES
N
O
CHECK BRIDGE
RECTIFIED
CHECK START C.K.T
CHECK IC401
CHECK D919
CHECK Q911
Q911 FAILURE
CHECK Q901
CHECK IC901
CHECK AC LINE
VOLT 120V OR 220V
CHECK F901, SW901
CHECK LINE RECTIFIED
& SMOOTHED VOLT
CHECK Q901
IC901 FAILURE
CHECK T901 O/P
MAKE SURE THAT
THE VARIABLE
O
K
OUTPUT IS NOT SHORTED
D911, D917, Q904,Q906
PIN 14
,
15
,
16
,
28
,
B+
DRIVER
6.3V, -12V CIRCUIT OUTPUT
IC401 29(ABOUT 11.5V)
CHECK 80V, 53V, 14.5V
CHECK THE 53V
英华家电维修资料专用 QQ:505966338