Zenith PRO895X, Installation And Setup Manual

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SYSTEM ALIGNMENT
Mount Bracket Center
11" from Front Panel
Under the Green CRT
Center
11
III. PRELIMINARY ALIGNMENT SETUP
The following procedures are intended for complete
“Geometry/Convergence” setup. Use the customer’s signal for
doing phase, and size adjustments. You can use the internal
patterns for shape and convergence if the customer signal
sources do not have a cross-hatch pattern.
If you are realigning a single CRT, due to replacement, or doing
alignment touch up, perform the following steps as needed.
1. Yoke Tilt Alignment
Use a cross-hair or cross-hatch pattern. Monitor only the cen-
ter- most horizontal line of the pattern to check yoke tilt.
Do not use SW9501, on the 9-1510 module, to disable conver-
gence. The vertical circuit is not disabled, only the horizontal is
disabled.
a. Set Horizontal DC centering to “0” (red, green, blue).
b. Set Vertical DC centering:
Floor: Red = -30; Green = -20; Blue = -30.
Ceiling : Red = 30; Green = 20; Blue = 30.
c. In geometry mode and convergence mode (green, red, and
blue) set “SKEW” H = 0 and “SKEW” V = 0.
d. Adjust the Red, Green, and Blue yokes for no horizontal
tilt or twist.
2. Yoke Ring Magnet and Astigmatator Alignment
Verify Only - This is not a normal field adjustment.
The astigmatator assembly should be mounted 62.5 mm from
the video output module (from the front edge of the video out-
put module to the six pole rings). Refer to figure on page 24.
Astigmatator Alignment Verification Test
Adjust for the best electrical and mechanical focus.
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