Hitachi C28W40TN, Service Manual

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9
FOCUS ADJUSTMENT
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Receive the Philips circle pattern.
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Adjust after horizontal/vertical has been adjusted.
•
Switch the received signal to the cross hatch signal.
•
Turn the focus VR gradually clockwise from the full counter clockwise position so that the focus of the vertical line in the
centre part, furthest to the right is adjusted for best result (contrast - maximum, brightness - normal).
WHITE BALANCE ADJUSTMENT
•
Receive 100% white signal. (Do not use factory signals, use generator through RF, for improved signal)
•
Set Colour Saturation to centre
•
Adjust Red and Blue bars using the 'white point' menu Measurement to be made at 10cd
CL Model 7400
o
K
W30 Models 8700
o
K
C Model 9300
o
K
All new models from August 1999 (including the W30), the colour temperature should be set to 8700K
TEXT BRIGHTNESS
•
Set text pattern to white box test pattern
•
Adjust brightness to 90Cd/m
2
CUT-OFF ADJUSTMENT
•
Rough Adjustment.
•
Set video mode with no signal.
•
Turn screen pot of FBT until lines disappear.
•
Fine Adjustment.
•
Select A.V mode without any signal applied.
•
Service »» white point »» more on bottom line. You can see
0+ or i- or 0-
This is an indication of the black current status (cut-off). Adjust it to 'i-' with screen pot of FBT.
PICTURE SOFTWARE SETTINGS.
SEE SHIPPING SPEC. TABLES AT THE END OF THIS DOCUMENT.
RGB SHIFT
•
Receive RGB signal from scart, and SERVICE»» HORIZONTAL»» RGB SHIFT by handset.
•
Adjust the horizontal picture position by changing RGB SHIFT.