User`s guide

Troubleshooting Diagnosing A Suspected Hardware Problem/Using the AppleVision
DSU
able to
communicate
with display (Create File
process
successful)
?
Click Adjust
Geometry.
Adj.HV according to
spec in Service
Source.
High
voltage
OK
?
Open DSU
and click Create File.
Replace
CRT/video
board.
Measure voltage between
chassis ground and
RL1 (390 Ohm, pin
closest to CP17).
Voltage
measures
11.5 to 12.5 V
?
No
Yes
Yes
Yes
No
Return display for
whole unit.
Adjust display.
Yes
No
Start
Replace
MDB.
Problem
gone?
Problem
gone?
End
End
No
Click Adjust
Geometry.
Adj.HV according to
spec in Service
Source.
No
Yes