Ricoh spu2 Service Manual

FILM PROJECTOR UNIT

(Machine Code: A998)

28 December 1993 SPECIFICATION

1. SPECIFICATION

Acceptable Film Type: • Type: Positive film/Negative film

• Size: 35 mm - Approx. 140 x 210 mm

Others:60 x 45 mm, 60 x 60 mm,

60 x 70 mm, 60 x 80 mm, 60 x 90 mm, 6 cm x 6 cm 4" x 5"

Max: 140 x 210 mm or 5.5" x 8.2"

• Mount: Yes (Up to 5 frames can be set in a film holder.)

• Strip: Yes (A series of 6 frames can be set in a film holder.)

Focusing: Fixed/Manual Effective Film Area: • 35 mm: Approx. 22.2 x 33.3 mm

• Other Sizes: Full Size

Projection Ratio • 35 mm: Approx. x 6

• Other Sizes: x 1

Copy Image Size • 35mm mount:124 x 195 mm

• 35mm strip: 133 x 200 mm

• Other Sizes: Full Size

The reproduction features of the copier are available. Power Source: ☞ inside page of the front cover. Power Consumption: Maximum: 55W Dimensions (W x D x H): Projector: 300 x 442 x 204 mm

11.8" x 17.4" x 8.03"

Mirror Unit: 295 x 232 x 50 mm

11.61" x 9.13" x 1.97"

Weight: 11 kg or 24.3 lb Remarks: The holder is required for installation.

Unit

Film Projector

ELECTRICAL COMPONENT LAYOUT AND DESCRIPTIONS 28 December 1993

2. ELECTRICAL COMPONENT LAYOUT AND DESCRIPTIONS

Symbol Name Function

PCB1

PCB2

PCB3

M1 Lamp Cooling Fan Blows air to the projector lamp section. 2

SW1 Projector Switch Provides power to the projector unit. 1

L1 Projector Lamp Applies light to the film for exposure. 7

TH1

TF1

TR1

Projector Lamp Regulator Supplies dc voltage to the projector lamp

Projector Control Board Controls the projector unit,

Noise Filter Board (220–240V machine only)

Lamp Thermistor Detects the temperature around the

Lamp Thermofuse Opens the projector lamp circuit if the

Transformer Steps down the wall voltage to 17 ∼ 18 V

and lamp cooling fan.

communicating with the copier main board.

Removes electrical noise.

projector lamp to control the lamp cooling fan.

projector lamp section overheats.

ac.

Index

No.

[I]

[E]

28 December 1993 SECTIONAL DESCRIPTIONS

3. SECTIONAL DESCRIPTIONS

3.1 OVERVIEW

[H]

[G]

[J]

[K]

This film projector unit allows making copies from the following kinds of films:

35 mm positive slides (both mount films and glass mount films) 35 mm negative or positive strip films Positive or negative films of wide size

(60 x 45 / 60 x 60 / 60 x 70 / 60 x 80 / 60 x 90 mm / 4" x 5" / maximum size of 140 x 210 mm or 5.5" x 8.2")

[C]

[A]

[B] [D]

[F]

The light from the projector lamp [A] is reflected by the reflector [B] and reaches the film (35 mm) in the film/slide holder [C] through the non-spherical lens [D], heat filter [E], and condenser lenses [F]. The projected film image reaches the mirror [G] through the correction filter (positive or negative) [H] and projection lens [I]. Then the mirror reflects the image to the exposure glass through the Fresnel lens [J]. The first scanner moves under the exposure glass to read the projected film image and the light of the image is converted to R/G/B electrical signals by the CCD [K].

The projected image on the exposure glass is enlarged about 6 times the 35 mm film’s image.

In the case of wide size films, the first scanner reads the film placed on the exposure glass directly using the light from the projector lamp.

The lamp cooling fan turns on and off according to the temperature of the projector lamp section detected by the lamp thermistor. It turns on at around 45°C and turns off at around 44°C.

Unit

Film Projector

SECTIONAL DESCRIPTIONS 28 December 1993

3.2 SHADING

[35 mm Slide Positive] or [Positive Film Under Lens] On

[35 mm Strip Negative] or [Negative Film Under Lens] On

[A][A]

When the projector unit is selected, shading should be done after selecting the type of films. The shading should be done with a base film and the N-correction filter for the negative films and with the P-correction filter for the positive films.

The N-correction filter corrects color of the projected light. The P-correction filter corrects the light intensity of the projected light so that it becomes similar to that for the negative films.

When "Shading" [A] on the touch panel display is pressed, the first scanner moves and stops under the mirror unit. Then AGC (Auto Gain Control) for the light intensity from the projector lamp is performed. Shading for black and white levels is also performed after the AGC.

This "Shading" should be performed whenever the type of film is changed or the mirror unit is moved.

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