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SERVICE MANUAL
32 30APR96 – SM4530-1
Adjusting the NULL
Warning
Dangerous Voltage
[1] Disconnect the main power.
[2] Do the removal for the LOWER HOUSING ASSEMBLY.
Important
• It is necessary to make a FAN COVER TOOL. See the Tools section.
• If you cannot obtain the NULL position after doing the adjustment approximately 3 times, go to the adjustment
procedure for the PHOTOCELL.
[3] Install the FAN COVER TOOL over the FAN area and the LAMP MODULE. See the Tools section.
[4] Energize the projector.
[5] Set the projector to the LO-LAMP position.
[6] Install and hold the AUTO FOCUS TARGET SLIDE TL-3002 until it is fully seated in the GATE MECHANISM.
[7] Look through the PROJECTION LENS hole and observe the focus light path on the AUTO-FOCUS TARGET
SLIDE TL-3002. Check that the light image is correct. If not, do the Adjusting the FOCUS LIGHT PATH.
[8] Check that the TAB on the CLAMP PAD ASSEMBLY is in the NULL position. If the TAB is not in the correct
position, do the adjustment procedure for the NULL.
[9] Bend the PHOTOCELL BRACKET to move the NULL in the center; use T-BAR TL-3003.
Adjustment Specification
Use TL-3002 and FAN CAP 232729 to check the adjustment of the PHOTOCELL.
A091_4031BA
TL-3002
TARGET SLIDE
AUTO-FOCUS
A091_4031BCA
LENS
PROJECTION
light path
NULL position
PAD
CLAMP LEVER
TAB
T-BAR
TL-3003