Hsync Threshold Changeover Check; Sog Sync Correction Check - NEC MultiSync LCD2080UX -BKA Service Manual

7) The same inspection should be carried out also for INPUT2 (DSUB).

1.5.5 HSYNC Threshold Changeover Check

1) Enter Signal 32 from INPUT1. (1-dot missing + Outer frame screen)
2) Display the OSM menu, move it to the POSITION tab with the3and4keys, and press the SELECT key.
3) Adjust the cursor to H.SIZE with the3and4keys, and operate the + key to shift the H.SIZE by +4 steps.
4) Move it to SMT 2.7V/3.3V in the second tab of the FACTORY mode and make a modification of 1 → 0.
Confirm that the vertical stripes are shifted by about 1cm at that time. (The amount of shift depends on
the type of signal source.) Return it to 1 after the completion of inspection.

1.5.6 SOG SYNC correction Check

1) Enter Signal 33 from INPUT1 and make an SOG connection. (1-dot missing + Outer frame screen)
2) Move it to SOG SYNC PEAKING in the second tab of the FACTORY mode and make a modification of 0
→ 1. Confirm that there appears a phase shift. (The amount of phase shift depends on the type of signal
source.) Return it to 0 after the completion of inspection.
1.5.4
1.5.6
1.5.5
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