Zenith PRO895X System Alignment, Yoke Tilt Alignment, Yoke Ring Magnet and Astigmatator Alignment

SYSTEM ALIGNMENT

Mount Bracket Center	11
11" from Front Panel
Under the Green CRT
Center

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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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