Acer AC511 SERIES Service Manual - Page 18
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6-6 ABNORMAL VERTICAL SCANNING
1. ABNORMAL VERTICAL SIZE
READJUST V-SIZE FUNCTION VALUE
CHECK THE IC601 PIN 2 ABOUT 11.8V
PIN 4 ABOUT -12V
OK
CHECK VERT. OSC CIRCUIT
OK
READJUST V-SIZE FUNCTION VALUE
2. VERTICAL CENTER
READJUST V-CENTER
READJUST SIDEPIN
NG
NG
NG
NG
CHECK IC401 AND IC601
RELATIVE CKT
6-7 SIDE-PIN CUSHION DISTORTION
NG
17
CHECK D601, C605
RELATIVE CIRCUIT
CHECK THE VOLTAGE OF IC101
RELATIVE CIRCUIT
CHECK IC401 PIN 20, 21, 22, 23
RELATIVE CIRCUIT
CHECK IC401, Q404, Q405, Q406
RELATIVE CKT.