ViewSonic P95f+-1 Service Manual page 22

6-6 ABNORMAL VERTICAL SCANNING
1. ABNORMAL VERTICAL SIZE
READJUST V-SIZE FUNCTION
READJUST V-SIZE FUNCTION VALUE
VALUE CHECK THE IC601 PIN3, 2
ABOUT 13V
CHECK THE IC601 PIN 7 ABOUT 40V
OK
CHECK VERT. OSC CIRCUIT
OK
CHECK IC601 PIN 6 OUTPUT ABOUT
CHECK IC601 PIN5 OUTPUT
VOLTAGE WAVE 38Vpp
2. VERTICAL CENTER
READJUST V-CENTER
6-7 SIDE-PIN CUSHION DISTORTION
READJUST SIDEPIN
6-8 POOR FOCUS
READJUST FOCUS CONTROL
ViewSonic Corporation
NG
NG
NG
NG
NG
NG
19
CHECK D601, D602, R606
CHECK ZD601, ZD602 R626 & SMPS
R609& SMPS RELATIVE CIRCUIT
RELATIVE CIRCUIT
CHECK IC401 PIN 22, 23, 24
CHECK IC401 PIN 12, 13
RELATIVE CIRCUIT
CHECK IC101 PIN10, 11 IC401
CHECK IC101 PIN 9, 10
PIN18, 19
IC401 PIN 18, 19
CHECK IC401, Q404, Q405, Q406
CHECK IC401 RELATIVE CKT
RELATIVE CKT.
CHECK FOCUS CONTROL UNIT, FOCUS
LEAD WIRE, CRT SOCKET & CRT
Confidential – Do Not Copy
P95f+/B-1