NEC MultiSync 4FGe User Manual

CIRCUIT DESCRIPTION
TABLE OF CONTENTS
1., PowerSupplyCircuit
..........................................................................................................................................
35
(l-l) SWITCHING REGULATOR UNIT
............................................................
.
.................................................
36
(a) Rectifying and filtering circuit
....................................................................................................................
36
(b) Auxiliary power supply
circuit....................................................................................................................
36
(c) Converter circuit........................................................................................................................................
37
(d) Outputrectifying circuit
.............................................................................................................................
37
(e) Error detection amplifier circuit
.................................................................................................................
38
(9 Oscillatingandcontrol
circuit
....................................................................................................................
38
(g) Overvoltage protection
..............................................................................................................................
39
(h) Autoand Manual Degaussing
circuit ........................................................................................................
39
(1-Z) HV Voltage Circuit
......................................................................................................................................
40
(l-3) DC/DC converter for H deflection circuit
.................................................................................................... 44
(l-4) Low voltagechopper
regulator circuit
........................................................................................................
47
2. Interface circuit
...................................................................................................................................................
49
(2-l) Sync Interface Circuit
.................................................................................................................................
49
(2-2) Sync switch and Video Clamp pulse Circuit
..............................................................................................
50
(2-3)) Self Test Circuit
..........................................................................................................................................
51
3. Video System
.....................................................................................................................................................
52
(3-l) Video SignalAmplifier
................................................................................................................................
52
(3-2) Brightness and cut-off circuit
.....................................................................................................................
53
(3-3) Video Mute and Video Blanking Circuit
.....................................................................................................
54
(3-4)
ABL Circuit .................................................................................................................................................
54
4. Digital
ControlSystem
........................................................................................................................................
55
(4-l) Digital Control Circuit
.................................................................................................................................
55
5. Deflection System
...................................................................................................................................
.
..........
59
(5-l) HorizontalSystem
......................................................................................................................................
59
(5-1-l) H synchronization circuit
.....................................................................................................................
59
(5-l -2) H Phase Circuit
...................................................................................................................................
60
(5-l -3) H Drive Circuit
.....................................................................................................................................
61
(5-l -4) H Output Circuit
..................................................................................................................................
62
(5-l -5)Parabola Waveform
Generating
circuit
...............................................................................................
64
(5-2)) Vertical System ..........................................................................................................................................
66
(5-2-l)
V synchronization circuit..................................................................................................................... 66
(5-2-2)
V Position Circuit................................................................................................................................. 67
(5-2-3)
V SizeCircuit ...................................................................................................................................... 68
(5-2-4)
Vertical DeflectionCircuit.................................................................................................................... 69
34

NEC MultiSync 4FGe Specifications

General

Brand	NEC
Model	MultiSync 4FGe
Category	Monitor
Language	English