3M 1700 operating instructions Troubleshooting, Cleaning

Troubleshooting

Problem	Probable Causes		Solution
Lamp does not illuminate but fan	a. Lamp changer control not engaged.	a. Fully slide lamp changer control until it stops.
motor runs.	b. Lamp not seated properly.	b. Seat lamp squarely in socket.
	c. Burned out lamp.	c.	Replace lamp.
Neither lamp nor fan energize.	a. Projector not plugged in.	a. Plug projector into outlet.
	b. Stage cover not completely closed.	b. Close stage cover to engage safety interlock.
	c. No power at wall outlet.	c. Verify outlet has power.
Fan motor does not run but lamp	a. Fan blade/motor obstructed.	a.	Call for service.
illuminates.	b. Burned out fan motor.	b.	Call for service.
After replacing a burned out lamp, the	a. Defective lamp was installed.	a. Replace lamp.
new lamp fails.	b. Possible electrical problem.	b. If new lamp fails immediately, you may have
			an electrical problem. Call for service.
Short lamp life: Lamps seem to fail	a. Defective lamps.	a. Document actual lamp life, then contact Lamp
before expected life span.	b. High line voltage.		Supplier or 3M Service Center.
		b. Have electrical line checked by an electrician.
Projected image is wider at the top	a. Screen not aligned at 90° angle to projected	a. Tilt projection screen toward projector until
than bottom (Vertical Keystoning).	light beam.		image width is equal at top and bottom.
Projected image higher on one side	a. Projector not aligned at 90° angle to screen.	a. Rotate projector until image height is equal on
(Horizontal Keystoning).			both sides.
Projected image is dim.	a. Dirty stage glass, lenses, mirrors.	a.	Remove surface dirt.
	b. Condenser lens bracket open or retaining	b. Close and secure lens bracket with retaining
	clip not engaged.		clip.
	c. High/low lamp control setting incorrect.	c. Set control to high for brightest image.
Projected image does not have	a. Lamp not aligned properly.	a. Properly seat lamp in socket. Fully slide lamp
uniform brightness.			changer into position 1 or 2.
Yellow/orange to brown or blue colors	a. Lamp not at best location for projector to	a. Rotate color tuning dial to remove colors in
appear in corners of image.	screen distance.		corners.
Color, focus or image problem.	a. Optics out of alignment.	a.	Call for service.

Cleaning

For best performance, use 3M™Overhead Cleaner 676 to keep your projector free of excess dust and surface dirt.

Stage Glass and Lenses: Use 3M overhead cleaner and a soft, lint–free cloth to remove surface dirt from the stage glass, projector lens and bottom of Fresnel lens.

Projection Mirror: Use a soft brush to remove surface dirt from the projection mirror.

!Caution

The projection mirror is a front–surface mirror and to avoid damage to the lens surface, the lens must not be wiped clean.

4 3M 1700 Operator’s Guide