Apple lc 580.performa 580cd Manuale Di Servizio

Adjustments

Convergence - 30

Two Controls

If the CRT yoke has two

convergence controls,
1 Start up the unit and

allow it to warm up for

at least 15 minutes.

2 Run the Display Service

Utility and select the

Crosshatch I test

pattern

3 Using a flat-head plastic

adjustment tool, adjust

the control labeled YCH

or VR1 for the best

convergence of the

horizontal lines at the

Crosshatch I