3M
™
Overhead Projector 1800
Illustrated Parts Breakdown
© 3M 2004
15
Top Cover Assembly Parts List (with taped-in stage glass)
Item
3M Part Number
Description
Qty.
1A
78-8120-8570-8
Top Cover Module, Basic (U.S)
1
1B
78-8120-8571-6
Top Cover Module with Lamp Changer and Clock (U.S.)
1
1C
78-8120-8568-2
Top Cover Module, Basic (A4)
1
1D
78-8120-8569-0
Top Cover Module with Lamp Changer and Clock (A4)
1
2 78-8120-4155-2
Glass,
Stage
1
3 78-8005-0481-9
Spring,
Compression
1
4
78-8079-8768-6
Latch, Top Cover
1
5 78-8120-3114-0
Retainer,
Fresnel
2
6A
78-8120-8502-1
Fresnel, Dual Element (inverted singlet) – 175.3 mm
1
6B
78-8120-8504-7
Fresnel, Dual Element – 182.5 mm
1
7A
78-8120-3138-9
Button, On/Off, Red
1
7B
78-8120-3151-2
Button, On/Off, Blue
1
8A
78-8120-8563-3
On/Off Button Kit, Red (Not shown)
1
8B
78-8120-8564-1
On/Off Button Kit, Blue (Not shown)
1
Note:
Top covers prior to S/N 18023074 have taped-in
stage glass. If the stage glass needs repair, a new top cover
must be ordered. Refer to 1800 Technical Bulletin #6.
