Abnormal Vertical Scanning; Side-Pin Cushion Distortion; Poor Focus - AOC C787 Service Manual

1. ABNORMAL VERTICAL SIZE
READJUST V-SIZE FUNCTION VALUE
CHECK THE IC601 PIN 7 ABOUT 40V
CHECK VERT. OSC CIRCUIT
CHECK IC601 PIN 6 OUTPUT ABOUT
38Vpp
2. VERTICAL CENTER
READJUST V-CENTER
READJUST SIDEPIN
READJUST FOCUS CONTROL

6-6 ABNORMAL VERTICAL SCANNING

NG
OK
NG
OK
NG

6-7 SIDE-PIN CUSHION DISTORTION

NG
NG
CHECK ZD601, ZD602 R626 & SMPS
RELATIVE CIRCUIT
CHECK IC401 PIN 22, 23, 24
NG
CHECK IC401 PIN 12, 13
RELATIVE CIRCUIT
CHECK IC101 PIN 9, 10
IC401 PIN 18, 19
CHECK IC401, Q404, Q405, Q406
RELATIVE CKT.

6-8 POOR FOCUS

CHECK FOCUS CONTROL UNIT, FOCUS
LEAD WIRE, CRT SOCKET & CRT


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