Acer AL707 - Page 25

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C) OUTPUT CURRENT ABNORMALITY:
FAIL
PASS
D) ENBALE ABNORMALITY:
FAIL
PASS
E) DIMMING CONTROL ABNORMALITY:
FAIL
PASS
CHECK PWM FREQUNCY AT C6
CHIP
THE OSCILLATOR FREQUNCY
RANGE = 150 ~ 250 KHZ
TO CHANGE C6 CHIP OR IC
CHIP
FUNCTION TEST OK!
IF ENABLE ABNORMALITY
1. TO CHECK IC PIN 9 TURN ON HAVE
12 VOLTAGES
TO CHANGE ON Q1
& Q2
FUNCTION TEST OK!
IF DIMMING ABNORMALITY TO
CHECK R1/R2/R33/C6 IS FAILD?
TO CHANGE ON
R1/R2/R33/C6R203
FUNCTION TEST OK!