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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 : 60.5V - 145V
DEPENDING UPON H.SYNC FREQUENCY)
(B)
CONSTANT OUTPUT : 6.3V,16V, 220V, 80V
BEAD SET
ABNORMAL VARIABLE OUTPUT
NG
OK
NG
OK
NG
OK
NG
NG
NG
OK
OK
OK
NG
OK
NG
YES
NO
CHECK BRIDGE
RECTIFIED CIRCUIT
6.3V CIRCUIT
CHECK START C.K.T
CHECK POWER SAVING
C.K.T(OFF-MODE)
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
OK
D909, Q904, R922, R925
CHECK Q912, Q914, Q915
PIN 4, 5, 6, B+ DRIVER
OUTPUT IS NOT SHORTED
VOLTAGE 55V
CHECK THE C934
CHECK 80V, 55V, 14.5V
CHECK START
C.K.T R906
R907
CHECK
80V,220V,16V,
6.3V CIRCUIT
CHECK THE C921
VOLTAGE 55V
CHECK D918
Q408 FAILURE
Содержание HA703UT
Страница 2: ... 1 SERVICE MANUAL COLOR MONITOR IIYAMA Date Sep 08 01 Ver A00 ...
Страница 24: ... 33 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY ...
Страница 54: ... 63 9 IC BLOCK DIAGRAM IC101 NT6861 VCC MODE WC SCL SDA VSS E2 E1 PRE 24C08 IC102 8 7 6 5 1 2 3 4 ...
Страница 57: ... 66 10 CRT BOARD LAYOUT ...