ViewSonic E70FSB-2 Service Manual - Page 24
Abnormal Vertical Scanning, Abnormal Vertical Size, Vertical Center, 7 Side-pin Cushion Distortion,
UPC - 766907870558
View all ViewSonic E70FSB-2 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 24 highlights
6-6 ABNORMAL VERTICAL SCANNING 1. ABNORMAL VERTICAL SIZE READJUST V - SIZE FUNCTION CHECK THE IC601 PIN 2 ABOUT 12V PIN 4 ABOUT -12V NG OK CHECK VERT. OSC NG OK NG READJUST V-SIZE FUNCTION CHECK D601, RELATIVE CIRCUIT CHECK THE VOLTAGE OF RELATIVE CIRCUIT CHECK IC401 PIN 12, 13, 21, 22,24 RELATIVE CIRCUIT 2. VERTICAL CENTER READJUST V-CENTER NG CHECK IC401 AND IC601 RELATIVE CKT 6-7 SIDE-PIN CUSHION DISTORTION READJUST SIDEPIN NG 6-8 POOR FOCUS CHECK IC401, Q404, Q405, Q406 RELATIVE CKT. READJUST FOCUS CONTROL NG CHECK FOCUS CONTROL UNIT, FOCUS LEAD WIRE, CRT SOCKET & CRT ViewSonic Corporation 21 Confidential - Do Not Copy E70f-5_E70fB-5_E70fSB-5
6-6
ABNORMAL VERTICAL SCANNING
1. ABNORMAL VERTICAL SIZE
OK
NG
OK
NG
READJUST V - SIZE FUNCTION
RELATIVE CIRCUIT
CHECK VERT. OSC
RELATIVE CIRCUIT
NG
READJUST V-SIZE
FUNCTION
CHECK THE VOLTAGE OF
RELATIVE CIRCUIT
CHECK IC401 PIN 12, 13, 21, 22,24
CHECK THE IC601 PIN 2 ABOUT 12V
PIN 4
ABOUT -12V
CHECK D601,
2. VERTICAL CENTER
NG
READJUST V-CENTER
RELATIVE CKT
CHECK IC401 AND IC601
6-7 SIDE-PIN CUSHION DISTORTION
NG
READJUST SIDEPIN
CHECK IC401, Q404, Q405, Q406
RELATIVE CKT.
6-8 POOR FOCUS
READJUST FOCUS CONTROL
NG
CHECK FOCUS CONTROL UNIT,
FOCUS LEAD WIRE, CRT SOCKET & CRT
ViewSonic Corporation
Confidential – Do Not Copy
E70f-5_E70fB-5_E70fSB-5
21