Hitachi 51SWX20B Training page 125

DP-2X DIGITAL CONVERGENCE ALIGNMENT PROCEDURES
Complete Digital Convergence Alignment
Center the Overlay Jig geometrically on the screen
Receive any NTSC signal (Crosshair if possible)
Clear RAM data (DCU RAM)
Service only
switch
is on the
Deflection
PWB.
No DCU Correction
added results in severe
pincushion distortion
Center Magnet Adjustments
Use the Centering
Magnets closest to
the Yoke
Front View
R B
G
Set SCREEN FORMAT TO NORMAL mode
Press and hold the SERVICE ONLY
S W I T C H , t h e n p r e s s t h e P O W E R
Button and release, picture appears.
Release the SERVICE ONLY SWITCH
again. DCU Grid appars.
Select the External Center Cross Signal
by pressing the EXIT button 5 times.
Align the G,R,B individual
c e n t e r c r o s s e s t o t h e i r
respective marks on the
Overlay using the Yoke
Center Magnets
Red = Left Blue = Right
Green = Center
A
External Selected Center
Cross with no DCU center
R G B
See Offset Chart for exact distances Page 06-09
Internal
Digital "Cross
Hatch Signal"
is projected
data
PAGE 07-25