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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