Table Of Contents - NEC MultiSync 4FGe Service Manual

TABLE OF CONTENTS

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