20
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: 80V - 160V
(DEPENDING EPENDING UPON H.SYNC FREQUENCY)
(B)
CONSTANT OUTPUT: 6.3V, 14.2V, -12V, 60V AND 77V
BEAD SET
ABNORMAL VARIABLE OUTPUT
CHECK IC401
PIN2~6
B+ DRIVER
IC401 Pin10
(About 11.5V)
MAKE SURE THAT THE
VARIABLE OUTPUT IS
NOT SHORTED
CHECK THE 60V
CHECK D919
IC401 Pin10
(About 11.5V)
Q911
FAILURE
CHECK START C.K.T
R923, R928, D911, D917
CHECK AC LINE
VOLTAGE 120V OR 220V
CHECK F901,
SW901
CHECK LINE RECTIFIED
&SMOOTHED VOLTAGE
CHECK BRIDGE
RECTIFIED CIRCUIT
CHECK T901 O/P
CHECK
77V,60V,14.2V
6.3V,-12V Circuit
Output
CHECK IC901
IC901 FAILURE
CHECK
Q901
NG
OK
NG
NG
OK
NG
OK
CHECK Q901
OK
NG
OK
NG
OK
NG
OK
NG
OK
OK
http://jdwxzlw.5d6d.com/?fromuser=华盛维修
家电维修资料网,免费下载各种维修资料
Содержание 105G7
Страница 23: ...22 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 42: ...41 9 2 IC BLOCK DIAGRAM IC101 NT68F65 IC102 24C08 http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 44: ...43 IC401 TDA4841 IC601 TDA4863A http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 45: ...44 IC801 LM1237 http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 46: ...45 IC802 LM2469 IC803 LM2480NA http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 47: ...46 10 PCB LAYOUT 10 1 MAIN PCB LAYOUT http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 48: ...47 10 2 CRT BOARD LAYOUT http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 49: ...48 11 SCHEMATIC DIAGRAM http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 50: ...49 http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 51: ...50 http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...
Страница 52: ...51 http jdwxzlw 5d6d com fromuser 华盛维修 家电维修资料网 免费下载各种维修资料 ...