Trouble Shooting - NEC MultiSync FP1370 Service Manual

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....................................................................................................................... 7-33
15. PLUG & PLAY FAILURE...................................................................................................... 7-34
15-1. DDC 1 failure................................................................................................................ 7-34
15-2. DDC 2B failure.............................................................................................................. 7-34
16. OUT OF Cg-SPECIFICATION................................................................................................................... 7-35
17. USB CIRCUIT FAILURE............................................................................................................................7-36
18. AUTO ADJUST CIRCUIT FAILURE........................................................................................ 7-37

TROUBLE SHOOTING

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