Trouble Shooting - NEC MultiSync FP1350 Service Manual

TROUBLE SHOOTING

TABLE OF CONTENTS
1. NO RASTER ........................................................................................................................... 7-2
2. ABNORMAL VIDEO ON CRT SCREEN (too dark or too bright) ................................................... 7-4
3. UNSTABLE PICTURE ........................................................................................................... 7-8
3-1.Horizontal ...................................................................................................................... 7-8
3-2.Vertical ......................................................................................................................... 7-9
4. ON SCREEN MANAGER (OSM) FAILURE .............................................................................. 7-10
5. ABNORMAL PICTURE ........................................................................................................ 7-11
5-1.Horizontal Size ............................................................................................................... 7-11
5-2.Vertical Size ................................................................................................................. 7-13
5-3.Horizontal Position ........................................................................................................ 7-13
5-4.Vertical Position ............................................................................................................ 7-14
5-5.Poor Linearity ............................................................................................................... 7-14
5-5-1.Horizontal .............................................................................................................. 7-14
5-5-2.Vertical .................................................................................................................. 7-14
5-6.Distortion Correction Circuit .............................................................................................. 7-15
5-7.Poor Focus .................................................................................................................. 7-16
5-8.Impurity On CRT Screen .................................................................................................. 7-17
6. H OSC / DEF / HV CIRCUIT FAILURE .................................................................................... 7-20
7. V OSC / DEF CIRCUIT FAILURE .......................................................................................... 7-23
8. SELF TEST ERROR ............................................................................................................ 7-24
9. RASTER CENTERING CIRCUIT FAILURE ............................................................................. 7-25
10. RASTER ROTATION ERROR ............................................................................................ 7-25
11. POWER MANAGEMENT SYSTEM (PMS) FAILURE ............................................................... 7-26
11-1. PMS FAILURE 1(When a monitor receives Horizontal and Vertical Sync.) ............................... 7-26
11-2. PMS FAILURE 2(When a monitor receives no Horizontal Sync) ............................................... 7-27
11-3. PMS FAILURE 3(When a monitor receives no Vertical Sync) ................................................ 7-27
11-4. PMS FAILURE 4(When monitor receives neither Horizontal nor Vertical Sync) ........................ 7-27
12. DIGITAL CONTROL CIRCUIT FAILURE .............................................................................. 7-28
12-1. Digital control error ...................................................................................................... 7-28
12-2. User control error ........................................................................................................ 7-29
12-3. DAC output error .......................................................................................................... 7-29
13. SWITCHING REGULATOR CIRCUIT FAILURE ..................................................................... 7-30
14. MOIRE CANCEL FAILURE ............................................................................................... 7-32
15. PLUG & PLAY FAILURE ................................................................................................... 7-33
15-1. DDC 1 failure ............................................................................................................. 7-33
15-2. DDC 2B failure ......................................................................................................... 7-33
16. OUT OF Cg-SPECIFICATION ............................................................................................ 7-34
17. USB CIRCUIT FAILURE .................................................................................................... 7-35
18. AUTO ADJUST CIRCUIT FAILURE ..................................................................................... 7-36
7-1
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