NEC MultiSync FP1350 - Trouble Shooting

7-1
TROUBLE SHOOTING
TABLE OF CONTENTS
Page
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