Dolev 800/800V/800V² - Assemblies
Dynamic Optics
Shutter Assembly (Cat. No. 509C34249)

Dynamic Optics - Shutter Assy ( in Upper Third of Opening View ) (zoom image)

Shutter Protector with Wheel

Description

The shutter blocks the laser beam when the imagesetter is not in exposure mode and when there are stop spirals.
The shutter assembly (#204) is mounted inside of the lens housing (#107), and is part of the dynamic optics.
A light detector is installed on the shutter with an intensity read back which goes to the OMC board.

Cleaning & Replacement of the Shutter Assembly

Before You Start
Tools & Accessories
Disassembling the Shutter Assembly
Cleaning the Assembly
Assembling the Shutter Assembly

Before You Start

1. Prepare a clean surface with a lint free cloth.
2. Be sure that you have enough free space in and around the machine to pull the assembly out.
3. The replacement requires good lighting. Set up a light stand or some other method of providing sufficient lighting.

Tools & Accessories

Set of Allen keys

Disassembling the Shutter Assembly

Disassembling the Shutter

1. Power off the imagesetter using the control panel ON/OFF switch.
2. Open the left and right service door.
3. Remove the light-proof cover from the upper left side of the unit.
4. Remove the shutter protector (#225)
5. Disconnect the cable connector (#14, 15, 16).
6. Remove the Allen screw that holds the shutter assembly (#204) to the lens housing.
7. Gently lift up the shutter and place it on the clean lint free cloth.

Cleaning the Assembly

1. Important: Hard dust particles left on the mirror cause scratches. Use a compressed air can to blow away any dust or lint from the optical components. If compressed air is not available, use a rubber bulb.
2. Fold a piece of lens tissue repeatedly to the shape of a pad that will fit the shutter holes.
3. Clamp the pad with a hemostat soaked with alcohol and gently wipe the mirror and the solar cell. To access the solar cell, tilt the shutter assembly upside down.
4. If the cleaning is not sufficient, dismantle the lower section of the shutter. Pull out the cover with the mirror.
5. Clean the mirror and the solar cell and re-assemble the unit. Check that the mirror is in the correct position.

Assembling the Shutter Assembly

1. Put back the shutter assembly. Secure the Allen screw.
2. Reconnect the cable connector.
3. Replace all of the light-proof covers. Close the service doors.
4. Power on the imagesetter.
5. Activate the shutter through the diagnostics. Make sure the shutter functions well. On the main diagnostics menu, select 9. UTILITIES:
6. Select 6. Optics:
   Shutter On
   Shutter Off
   Shutter Test
   
   Check for acceptable results.