Ricoh spu3 Service Manual

FILM PROJECTOR UNIT

(Machine Code: A718)

10 May 1996 SPECIFICATIONS

1. SPECIFICATIONS

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

• Size: 35 mm - Approx. 140 x 210 mm

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

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

Max: 142 x 210 mm or 5.6" x 8.2"

• Mount: Yes (Up to 5 frames can be set in the

film holder.)

• Strip: Yes (A series of 6 frames can be

set in the film holder.)
Focusing: Fixed/Manual
Effective Film Area: • 35 mm: Approx. 21.5 x 33.0 mm

• Other Sizes: Full Size

Projection Ratio • 35 mm: Approx. x 6

• Other Sizes: x 1

Copy Image Size • 35 mm mount:120.8 x 192.7 mm

• 35 mm strip: 129.3 x 198.6 mm

• Other Sizes: Full Size

All the reproduction fea tures of the copie r are ava ilab le.
Power Source: 115 V 60 Hz, more than 1.0 A

220 ~ 240 V 50/60 Hz, more than 0.6 A
Power Consumption: Maximum: less than 185 VA
Dimensions (W x D x H): Projector: 300 x 442 x 212 mm

11.8" x 17.4" x 8.35"

Mirror Unit: 298 x 232 x 50 mm

11.73" x 9.13" x 1.97"

Weight: Projector: 10 kg, 22.1 lb

Mirror unit: 5 kg, 11.1 lb
Remarks: The holder is required for installa tio n.

A718-1

Options

2

6

ELECTRICAL COMPONENT LAYOUT AND DESCRIPTIONS 10 May 1996

2. ELECTRICAL COMPONENT LAYOUT AND

DESCRIPTIONS

1

3

4

9

8

7

5

A718V500.img

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

and lamp cooling fan.

Projector Control Board Controls the projector unit,

communicating with the copier main
board.

Noise Filter Board
(220–240V machine only)

Lamp Thermistor Detects the temperature around the

Lamp Thermofuse Opens the projector lamp circuit if the

Transformer

Removes electrical noise.

projector lamp to control the lamp
cooling fan.

projector lamp section overheats.
Steps down the wall voltage to 17 ∼ 18 V

ac.

Index

No.

4

5

3

8

9

6

A718-2

10 May 1996 SECTIONAL DESCRIPTIONS

3. SECTIONAL DESCRIPTIONS

3.1 OVERVIEW

[H]

[G]

[C]

[E]

[A]

[B]

[D]

[J]

[I]

[F]

[K]

A718D500.wmf

This film projector unit allows making copie s from the followin g kind s 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

(45 x 60 / 60 x 60 / 60 x 70 / 60 x 80 / 60 x 90 mm / 4" x 5" /
maximum size of 142 x 210 mm or 5.6" x 8.2")

The light from the projector lamp [A] is reflect ed by the refle cto r [B] and
reaches the film (35 mm) in the film/slide holder [C] through the non-spherical
lens [D], heat filter [E], and cond enser len ses [F]. The projected film image
reaches the mirror [G] through the correctio n filt er (po sitive or negat ive) [H]
and projection lens [I]. Then the mirror re fle cts th e image on to the expo sure
glass through the Fresnel lens [J]. The first scanner moves under th e
exposure glass to read the project ed film image and the light of the image is
converted to R/G/B elect rical sign als by th e CCD [K] .

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

In the case of wide films, the first scanner reads the film placed on the
exposure glass directly using the lig ht from th e pro ject or lamp .

The lamp cooling fan turns on and off depending on the temperature of the
projector lamp section dete cte d by the lamp thermistor. It turns on at around
45°C and turns off at around 44°C.

Options

A718-3

SECTIONAL DESCRIPTIONS 10 May 1996

3.2 SHADING

When the projector un it is select ed , shading should be done aft er sele ctin g
the type of film. The shading should be done with a base film and the
N-correction filter for the negative films and with the P-correction filter
(without base film) for the positive films.

The N-correction filter corrects the color and inten sity of the proje cte d ligh t.
The P-correction filter corrects the ligh t int ensity of the proje cte d light so th at
it becomes similar to that for the negative films.

When "Shading" is performed , th e first scann er move s and stops und er th e
mirror unit. Then AGC (Auto Gain Control) for the light intensity from the
projector lamp is performed. Sh ad ing for bla ck and white levels is also
performed after th e AG C.

This "Shading" should be performe d whe never th e typ e of film is chang ed or
the mirror unit is moved.

A718-4

[B]

[F]

Main scan
direction

10 May 1996 SECTIONAL DESCRIPTIONS

3.3 MIRROR UNIT

[C]

[B]

[A]

[F]

A718D501.img

[C]

[A]

Subscan
direction

[D]

[E]

A718D502.img

The film image projected through the projectio n len s [A] is reflect ed to the
Fresnel lens [B] by the mirror [C].

The Fresnel lens consists of two components, a circle pitch Fresnel lens [D]
and a parallel pitch Fresnel lens [E]. The circle pitch Fresnel lens changes
the divergent light to paralle l light. The parallel Fresnel lens collect s the light
from the circle pitch Fresnel lens in the main scan directio n so that all the
light reaches the color CCD lens [F].

The use of these two types of Fresnel lens makes the most of the ligh t
intensity from the projector lamp.

Options

A718-5

10 May 1996 FILM PROJECTOR UNIT (A718) INSTALLATION

8. FILM PROJECTOR UNIT (A718)

INSTALLATION

8.1 ACCESSORY CHECK

Make sure that each accessory listed in the following table is in the bo x. Also
check the condition of ea ch ite m.

1. Mirror Unit........................................................................... 1

2. Power Cord ......................................................................... 1

3. Optical Fiber Cable............................................................. 1

4. Film Strip Holder............ .. ............ ................................ ....... 1

5. Slide Holder........................................................................ 1

6. Glass Mount Holder............................................................ 1

7. Base Film (FUJI, KODAK, AGFA)...................................... 3

8. Slide Mount......................................................................... 1

9. Correction Filter (P, N)........................................................ 2

10. Blower Brush...................................................................... 1

11. Projection Lamp.................................................................. 1

12. Film Position Sheet............................................ ...... .... ...... . 2

13. Positioning Pin.................................................................... 2

14. Spacer ................................................................................ 4

15. Philips Pan Head Screw - M4 x 8 . ...................................... 2

16. Philips Pan Head Screw - M4 x 12..................................... 4

17. Installation Procedure......................................................... 1

Installation

18. New Equipment Condition Report 1 (-17/-27 only)............. 1

3-51