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DVH-3900MP/XZ/EW5
29
5
6
7
8
5
6
7
8
C
D
F
A
B
E
Not avaliable to LCD lighting control?
OK
YES
F302, CN801(11), IC401(66), IC301(9)
YES
NO
Checked the
dimmer control input?
IC301(4), Q320, Q322, CN901(12)
YES
NO
Checked the LCD Vdd?
IC401(58, 59), Q319, Q321
YES
NO
Checked the LCD
Vdd control?
YES
LD991 ~ LD992
NO
Checked the LED?
3-C
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TEL 13942296513
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9
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Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299