Abnormal Vertical Scanning; Side-Pin Cushion Distortion - HP D8911A Service Manual

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

6-6 ABNORMAL VERTICAL SCANNING

NG
NG
NG

6-7 SIDE-PIN CUSHION DISTORTION

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.