Polaroid Miniportrait 455 User manual

Brand: Polaroid

Model: Miniportrait 455

Type: User manual

Polaroid Miniportrait 455 Below you will find a brief overview of the Polaroid Miniportrait 455 camera's features and capabilities. With this device, you can create four identical portraits, two pairs of identical portraits, or four different portraits on each sheet of Polaroid 4 x 5" (9 X 12 cm) instant pack film. It is also great for creating color or black and white prints using any of the four Polaroid film types, including Polacolor prints that meet the requirements for U.S. Passports.

The camera features a built-in sonar rangefinder for sharp focus and correct image size, as well as an adjustable countdown timer on the side for film processing timing. You can also use a remote shutter release with a 39" (1M) accessory cable for added convenience.

Repair Manual

Americas Business Center

Technical Services

201 Burlington Road

Bedford MA 01730

TEL: 1.781.386.5309

FAX: 1.781.386.5988

Miniportrait 455

September 1996

Table of Contents

Page

Section 1 — General Description..................................................................... 6

Specifications ................................................................................................ 8

Serial and Model Number Location ............................................................... 11

Section 2 — Operation...................................................................................... 12

Shutter Charging (Cocking) ........................................................................... 12

Shutter Release............................................................................................. 14

Exposure Counting Mechanism..................................................................... 15

Exposure Mode Selection.............................................................................. 16

Single-Frame Exposure Action...................................................................... 18

Dual-Frame Exposure Action......................................................................... 20

Electronic Circuit Functions........................................................................... 21

Main PC Board ......................................................................................... 21

Electronic Flash PC Boards ..................................................................... 23

Sonar PC Board ....................................................................................... 23

Camera Wiring Diagram................................................................................ 27

Section 3 — Disassemblly And Reassembly .................................................. 28

General Guidelines, Tools and Cautions ....................................................... 28

Guidelines ................................................................................................ 28

Tools Required ......................................................................................... 29

Cautions ................................................................................................... 29

Camera Body Disassembly and Reassembly................................................ 30

Hand Grip Disassembly and Reassembly ..................................................... 33

Disassembly ............................................................................................. 33

Reasembly................................................................................................ 33

Viewfinder Disassembly and Reassembly..................................................... 35

Disassembly ............................................................................................. 35

Reassembly.............................................................................................. 36

Removing the Electronic Flash Assembly ..................................................... 38

Replacing the Electronic Flash Assembly ..................................................... 40

Electronic Flash Disassembly........................................................................ 41

Replacing the Motor....................................................................................... 43

Removing the Shutter Assembly.................................................................... 44

Shutter Disassembly...................................................................................... 46

Removing the M. Blade Assembly as a Unit ............................................ 46

Removing the Diaphragm Blade Assembly .............................................. 49

Removing the Light Interception and Shutter Blades ............................... 51

Reassembling the Shutter ............................................................................. 52

Replacing the Light Interception and Shutter Blades ............................... 52

Replacing M. Blade/M.S. Disk and Motor Disk Assemblies ..................... 54

Mode Select Gear Reassembly................................................................ 56

Replacing the Shutter Assembly in the Camera ............................................ 57

List of Illustrations

Figure Page

1-1 Model 455 Miniportrait Camera............................................................... 7

1-2 Model 455 Camera Dimensions.............................................................. 10

2-1 Motor-Driven Shutter Charging............................................................... 12

2-2 Main Lever Latching Action..................................................................... 13

2-3 Shutter Release Actions ......................................................................... 14

2-4 Indexing Exposure Counter after Shutter Release.................................. 15

2-5 M & MS Blade Rotation during Mode Selection...................................... 16

2-6 Motor Rapid Stop Circuit during Mode Selection.................................... 17

2-7 Rotational Control of M & MS Blades...................................................... 18

2-8 Shutter Blade Action in Single-Frame Exposure..................................... 19

2-9 Shutter Blade Action in Dual-Frame Exposure ....................................... 20

2-10 Main PC Board Schematic ...................................................................... 22

2-11 Electronic Flash PC Boards Schematic .................................................. 25

2-12 Sonar PC Board Schematic .................................................................... 26

2-13 Camera Wiring Diagram ......................................................................... 27

3-1 Camera Body Components Disassembly................................................ 32

3-2 Hand Grip Disassembly ......................................................................... 34

3-3 Viewfinder Disassembly ......................................................................... 35

3-4 Removing Viewfinder Front Cover .......................................................... 35

3-5 Unsoldering PC Plate leads (Viewfinder)................................................ 36

3-6 Shutter Button Reassembly .................................................................... 36

3-7 Bright Frame Reassembly....................................................................... 37

3-8 Eye Cup, Front Glass and Front Cover Reassembly .............................. 37

3-9 Removing Electronic Flash Assembly..................................................... 38

3-10 Left Hub Pin Position (Electronic Flash) ................................................. 40

3-11 Electronic Flash Unit Disassembly.......................................................... 42

3-12 Removing the Motor Disk and Motor....................................................... 43

3-13 Removing the Shutter Assembly from Camera Body............................. 45

3-14 Disassembling Exposure Counter Components...................................... 46

3-15 Disassembling M. Switch, S. Set Cam, Lever Components.................... 47

3-16 Removing the M. Blade Assembly from Shutter..................................... 48

3-17 M. Blade Assyembly Component Parts................................................... 48

3-18Aperture Link Lever Pin Connection to Aperture Control Lever..............49

3-19 Removing the Diaphragm Blade Assembly............................................. 49

3-20 Diaphragm Blade Disassembly............................................................... 50

3-21 Removing Light Interception and Shutter blades.................................... 51

3-22 Shutter and Light Interception Blade Reassembly.................................. 52

3-23 Replacing the Diaphragm Blade Assembly............................................. 53

3-24Reconnecting the Aperture Link Lever and Aperture Control Lever.......53

3-25 M. Blade Assembly Replacement ........................................................... 54

3-26 M. Blade Assembly Components ............................................................ 55

3-27 Reassembling Mode Select Gears.......................................................... 56

3-28 Replacing Shutter Assembly in the Camera Body .................................. 57

3-29 Correct Mounting of Bottom Frame......................................................... 58

3-30 Front Panel Replacement ...................................................................... 59

3-31 Wiring Placement................................................................................... 59

List of Tables

Table Page

3 -1 Removing Individual Components from Camera Body ........................... 30

Section I - General Description

The Miniportrait Camera is a hand-held or tripod-mounted photo camera designed to

meet a variety of photo identification needs. The 455 permits:

• Three portrait print combinations: four identical portraits, two pair of identical

portraits, or four different portraits on each sheet of Polaroid 4 x 5" (9 X 12 cm) instant

pack film.

• Color or Black and White Prints using any of four Polaroid film types (See

Specifications). Polacolor prints made by the Model 455 meet the requirements for

U.S. Passports.

• Subject lighting by direct or reflected flash, using built-in electronic flash;

supplementary, synchronized electronic flash; or tungsten illumination with

high-speed black-and-white films.

• Sharp focus and correct image size with built-in sonar rangefinder.

• Film processing timing with an adjustable countdown timer on the side of the Camera.

• Remote shutter release with 39" (1M) accessory cable.

• Choice of nine apertures and two shutter speeds for optimum exposure quality.

• Operation on four internal AA batteries, or external AC for high-volume

applications.

• Accessories available include supplementary lenses to allow more than one person

in each portrait; remote shutter release cable; extra film holders for easy

interchangeability between different films; an adapter for AC operation; and a cord for

syncing an auxiliary camera. See Specifications in the following paragraph for more

detail.

Figure 1-1. Model 455 miniportrait camera

Specifications

Film Types*:

559 Polacolor ER (80/20) - ideal for color portraits

552 PolaPan (400/27) - fine grain B&W positive prints

553 B& W (800/30) - similar to 552 but coaterless

554 B&W (100/21) - similar to 553 but lower speed

Film Holder*: Model 550 (PID 604030) - sold separately

Controls and Connectors and Indicators (Figure 1-1)

Camera ON/OFF Switch

Distance Selector: 1.5 or 1.9m (59 or 74")

Apertures: f/8 to f/32

Flash Brightness Switch for 80/100 & 400/800 speed films

Shutter Speeds: 1/60th & 1/125th sec.

Portrait Selector: 4 identical, 2 pairs of identical, or 4 different images.

Shutter Button

Portrait Counter

Flash Tilt Knob

Auxiliary Camera X-Sync Socket

Remote Shutter Release Socket

AC Adapter Socket

Flash Ready LED

Correct Focus LEDs (in Viewfinder)

Film Development Timer: Countdown type, time selectable, beeps at interval end.

Power: Four AA batteries in Hand Grip or AC with Adapter (See Accessories)

Camera Size: See Figure 1-2

Accessories: Remote Shutter Release Cable PID 612412 1m (39") long.

Supplementary Lenses 78A PID 603864: produce a smaller subject size, allowing more

than one person in each portrait.

AC Adapters: For 100V supply - PID 612559

For 120V supply - PID 612411

For 220V supply - PID 612427

For 240V supply - PID 612698

Caution

USE OF OTHER ADAPTERS MAY DAMAGE CAMERA

* Polaroid 4 x 5" sheet films can also be used with the Model 455, in a Model 545 Film

Holder, but image area will be off center (See Note at bottom of page 4 of Instruction

Booklet).

Figure 1-2. Model 455 camera dimensions

Serial and Model Number Identification

The Model 455 Miniportrait Camera has a decal on the back of the body, below the Pack

Film Holder, showing the following information:

Polaroid Miniportrait Camera Model 455

Serial Number

J 0 0050 B

B = configuration code

0050 = 50th unit manufactured

0 = Year produced (1990)

J = Month produced (Sept., since J is

the ninth letter of alphabet; letter I not used).

Section 2 - Operation

Shutter Charging (Cocking) (Figures 2-1 and 2-2)

1. As the motor runs, gear (a) rotates cam (b).

2. Cam (b) deflects the pin at the end of lever (c), moving lever (c) and turning gear

segment As the segment pivots, it turns the cocking lever (e) counter-clockwise. The

main lever (f) is also turned counter-clockwise, in its charging direction.

3. Pin (e’), attached to the underside of cocking lever (e), now moves the light interception

blade (g) back and forth as indicated in the drawing.

4. As main lever (f) turns, the pin on its nearer end rotates the shutter blade (h).

Figure 2-1. Motor-driven shutter charging

Motor

5. No exposure of the film occurs during this shutter charging process, since the ears on

the light interception blade (g) cover the exposure holes in the shutter blade (h), and

both blades turn together in this shutter charging process.

6. The main lever (f), shown in a top view in Figure 2-2 continues to rotate and turns the

magnet set lever (i) clockwise. Hook (j) linked to the magnet set lever is attracted to

the magnet.

7. Main lever (f) now reverses its direction (U-shaped arrow, Figure 2-2), because of the

action of cam (b) (Figure 2-1). The tooth at the end of the main lever latches to the

hook (j). Shutter blade (h) is now charged (cocked); the cocking lever (e) and light

interception blade (g) return to their original positions.

Figure 2-2. Main lever latching action

Shutter Release (Figure 2-3)

1. As the shutter is released, the magnet set lever is pulled away, hook (j) is unlatched

from main lever (f), and charge spring “C” actuates the shutter.

2. In a 1/60th-sec. exposure, shutter speed is reduced by pin “B” on the main lever (f)

striking the shock-absorbing cam “A” midway in its rotation.

3. In a 1/125th-sec. exposure, the shock-absorbing cam “A” is moved out of the path of

pin “B” by the speed selector lever, allowing spring “C” to drive the shutter blade with

maximum speed.

4. Just before shutter release is completed, the main lever (f) closes the shutter switch

(S4 in Figure. 2-5) to start the motor.

Figure 2-3. Shutter release actions

Exposure Counting Mechanism (Figure 2-4)

1. As the motor runs and turns gear (a), an eccentric crank pin on the gear causes

lever (b) to move back and forth.

2. As lever (b) moves laterally back toward the motor, its hook end engages a tooth of

gear (c) and indexes it one notch. The exposure counter dial correspondingly rotates

one count.

3. To prevent lever (b) during its opposite travel from rotating gear (c) backwards,

pawl (d) pulls in and locks the gear against backward rotation.

Figure 2-4. Indexing exposure counter after shutter release

Eccentric Cam

Exposure Mode Selection (Figures 2-5 through 2-7)

1. As the motor runs, cam (B) at the end of the gear train (bottom of Figure. 2-5) rotates

disc (A) counterclockwise one-quarter of a turn. The mode blade (a) also rotates

counterclockwise.

2. Spring (a’) links the M blade (a) to disk (A), and spring (b’) links the MS blade (b) to

disc (A), turning these blades in the direction shown by the arrows. The M blade (a)

and MS blade (b) cover the exposure windows in the shutter blade, according to their

respective exposure modes.

Figure 2-5. M & MS blade rotation during mode selection

S4 Switch

3. As cam (B) turns through the action of the gear train, an arm of the S4 switch (C) drops

into a valley on the cam, opening S4 (turning it OFF).

4. When S4 is driven to an OFF position, gate G of Q8 (Figure 2-6) goes high, activating

Q8 to short the motor input power and bring it to a rapid stop.

Figure 2-6. Motor rapid stop circuit during mode selection

5. To achieve the correct exposure action, the rotation of the M blade (a) and MS

blade (b) is controlled by pins (d’) and (d). These pins are moved up or down by the

cam “steps” on the ends of the mode select lever “A” shown in the circled areas of the

illustration. The pins are thus in or out of the rotational paths of the blades, preventing

or allowing blade rotation (see the three circled areas at right in illustration).

The M and MS blades, therefore, rotate or remain fixed, according to the exposure

mode selected (single-, dual-, or 4-frame. The operation of each of these modes will

now be explained in more detail.

SR Switch

Motor

Figure 2-7. Rotational control of M & MS blades

Single-Frame Exposure Action (Figure 2-8)

1. As described previously, when disk (A) rotates, the M blade (a) and MS blade (b),

coupled to the disk by springs, also rotate. But their degree of rotation is controlled by

the mode select pins (d) and (d’), resulting in the disk positions shown, Windows “A”,

“B” and “D” are blocked and only a single exposure window (“C”) remains open.

2. When the shutter is released, disk (A) begins turning again, driven by the motor.

The rotational forces applied to the M blade (a) and MS blade (B) by springs (a’)

and (b”), however, momentarily overpower the motor force. This causes the mode

select pins (d) and (d’) to momentarily deflect out of the way of (a’) and (b’) (dotted

paths), permitting the blades to turn freely.

MS Blade

M Blade

Figure 2-8. Shutter blade action in single-frame exposure

3. As disk (A) rotates further (as in 1. above), (a2) and (b2) are controlled by pin (d),

and (b3) is controlled by (d’). The three exposure windows “A”, “B” and “D” are again

blocked.

4. When the foregoing process has been repeated three more times, the single film

frame in the film holder will have four separate portrait exposures on it.

S4 Switch

Dual-Frame Exposure Action (Figure 2-9)

1. In this mode, disk (A), the M and MS blades and other components behave in a similar

fashion to the single frame mode, except for the following:

2. As shown in the lower half of Figure 2-9, the step cams at the ends of the mode select

lever move pins (d) and (d’) out of the way of the MS blade (b), permitting it to rotate

freely with disc (A). Thus the MS blade (b) stops at the position shown, resulting in

exposure windows “A” and “C” being blocked, and “B” and “D” open for a dual-frame

exposure.

Figure 2-9. Shutter blade action in dual-frame exposure

MS Blade

M Blade

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Polaroid Miniportrait 455 User manual

Polaroid Miniportrait 455 User manual

Polaroid Miniportrait 455 User manual

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