![background image](http://html1.mh-extra.com/html/viewsonic/perfectflat-e90fb-4/perfectflat-e90fb-4_service-manual_1020543015.webp)
ViewSonic Corporation E90fB-4
12
Confidential-Do Not Copy
4-2 TRANSISTOR & DIODE CIRCUIT
LOCATION
CIRCUIT FUNCTION DESCRIPTION
BD901
Bridge Rectifier for AC Source
D910
Clamp Diode for snub CKT
D919
Rectifier for Output Voltage
D922
Rectifier for Output Voltage
D923
Rectifier for Output Voltage
D930
Rectifier for Output Voltage
D918
Rectifier for Output Voltage
IC901
Power IC for Switching Power Control.
Q937, Q937
Use for Power Saving
Q912, Q920
Push-Pull Topology to Drive Q911
Q913 Degaussing
Switcher
Transistor
IC903 5V
Regulator
IC
Q403
HOR. Driver Transistor
Q417,Q418,Q416,Q420
Horizontal s correction control MOSFET
Q406
Transistor for H-Size Control
Q705
Brightness Control CKT
Q742
V-Dynamic focus CKT
Q402 Q403
Driver
MOSFET
Q901
MOS FET for Switching Power Control.
Summary of Contents for PerfectFlat E90fB-4
Page 46: ...ViewSonic Corporation E90fB 4 43 Confidential Do Not Copy 9 BLOCK DIAGRAM...
Page 48: ...ViewSonic Corporation E90fB 4 45 Confidential Do Not Copy SAA4849...
Page 52: ...ViewSonic Corporation E90fB 4 49 Confidential Do Not Copy...
Page 58: ...ViewSonic Corporation E90fB 4 55 Confidential Do Not Copy 11 PCB LAYOUT 11 1 MAIN PCB LAYOUT...
Page 59: ...ViewSonic Corporation E90fB 4 56 Confidential Do Not Copy 11 2 CRT BOARD LAYOUT...