Dolev 800 - Assemblies -
Mainframe and Vacuum Assembly

See: FCO20047    L. C. Side II - Replacing light cover fasteners (Conditional)
See: FCO18992    Replacing Pounded Anti-Static Disk -Dolev 800/800P Opto Mech Assy


Major Components
Mainframe & Top Assembly
Internal Drum & Central Beam Cleaning
Description of Vacuum System
Vacuum Pump
Vacuum Detectors (Sensors)
Vacuum Valves

Major Components

Mainframe & Top Assembly

See FCO 16669 - 15-JUL-93 - Adding Missing Door Interlocks

OptoMech - Base & Vacuum Tunnels (zoom image)
OptoMech - Base & Vacuum Tunnels - D800P (zoom image)
Optomech 800P (zoom image)

The Imagesetter is kept free of dust and light by a Mainframe and Top Assembly. The Mainframe consists of two parts: 1) the frame and, 2) the optomechanics housing and service doors. The cover contains the loading
cassette cover. The loading cassette cover is hinged to the cover. It also contains the control panel. There is also an opening in the back for the optional inline processor.

Internal Drum & Central Beam Cleaning

Tools and Accessories
Clean Internal Drum & Central Beam

Tools and Accessories

Lint free cloth
Medical needle
Vacuum gauge

Clean Internal Drum & Central Beam

1. Clean the drum and the beam from dust and dirt with a vacuum cleaner. use a lint free cloth. Wipe the surfaces if necessary.
   
   
2. Clean the drum vacuum holes with a medical needle (use 22G1.5 or a similar needle).
   
   
3. Activate, via the diag, the vacuum valves a few times (both parts A & B). Check with pieces of film that the vacuum functions properly.
   
   
4. Check the pressure level in two positions:
   a.     Without film: under pressure max, 55 cm water
   b.     With film in full format: min. 65 cm water
   

Perform the check separately for each part. Connect the pressure gauge in the vacuum sensor place. If the pressure level is above 55 cm water, check the cleanliness of the vacuum holes. If the pressure level in full format of film is under 65 cm water, check the system for any pressure leakages.

Description of Vacuum System

OptoMechanical - Base & Vacuum Tunnels (zoom image)
Optomech - Base & Vacuum Tunnels - D800P (zoom image)
Optomech 800P (zoom image)
Vacuum System 
Vacuum System Operation

The vacuum system is located on the main frame and it serves two independent zones on the internal drum.

The system contains:

1. Vacuum pump
   
2. Two vacuum valves
   
3. Two vacuum detectors
   
4. Distribution system

Vacuum Pump

Vacuum System (zoom image)

Overview
Replacement
Test

Overview

The vacuum system is located in the main frame on the left side of the machine. The access to the vacuum system is from the back.

Replacement

Before You Start
Tools and Accessories
Disassembly of the Vacuum Pump
Assembly of the Vacuum Pump

Before You Start

1. Switch off the power to the machine via the main switch.
   
   
2. Open the lower back panel after plugging out the main power cord and the 4 screws that hold the back panel to the main frame.

Tools and Accessories

Set of Allen Keys
Flat screw driver

Disassembly of the Vacuum Pump

1. Unscrew the two clamps of the flexible hoses and dismantle the hoses from the straight adaptor (do not attempt to open the 0 straight adaptor form its thread).
   
   
2. Unscrew the clamp of the flexible hose and dismantle the hose from the straight adaptor that connects the hose to the vacuum pump.
   
   
3. Open the 4 screws 1/4" that hold the pump to the blower base.
   
   
4. Disconnect the connector mini-fit that connect the wiring to the pump.
   
   
5. Pull out the pump.

Assembly of the Vacuum Pump

1. Put the new pump into its place.
   
   
2. Mantle and tight the 4 screws that hold the pump to the base.
   
   
3. Connect the hoses assembly that were before and tighten the clamps.
   
   
4. Connect the connector mini-fit back to its position.

Test

1. Activate the pump serveral times and check for good operation.
   
   
2. Put the film in full format on the drum. Activate for 15 minutes and check that the vacuum pump is functioning well and that the film holds to its place.

Vacuum Detectors (Sensors)

Note: Not in Use

Vacuum System (zoom image)

Procedure for By-Passing the Vacuum Sensor

Description
Replacement
Check

Description

The vacuum system is located in the main frame in the left side of the machine. The access to the vacuum system is from the back.

Replacement

Before You Start
Tools and Accessories
Disassembly of the Vacuum Detector
Assembly of the Vacuum Detector

Before You Start

1. Switch off the power to the machine via the main switch.
   
   
2. Open the lower back panel after plugging out the main power cord and the 4 screws that hold the back panel to the main frame.

Tools and Accessories

Set of Allen Keys
Flat screw driver

Disassembly of the Vacuum Detector

1. Dismantle the two screws 4-40 x 1¬" that hold the detector to the metal base on the main frame.
   
   
2. Disconnect by pulling out the hose that connects the detector to the valve.
   
   
3. Disconnect the connectors cable shoes which supply the power to the detector.

Assembly of the Vacuum Detector

1. Take the good vacuum detector and mantle it to place with the two screws 4- 40 x 1¬"
   
   
2. Connect the flexible hose back to its place.
   
   
3. Connect the wires cable shoes back to its place.

Check

1. Activate the pump several times and check for good operation.
   
   
2. Put a film in full format on the drum. Activate for 15 minutes and check that the vacuum pump is functioning well and that the film holds to its place.

Vacuum Valves

Vacuum System (zoom image)
FCO 16809 -

Description
Replacement
Check

Description

The vacuum system is located in the main frame in the left side of the machine. The access to the vacuum system is from the back.

Replacement

Before You Start
Tools and Accessories
Disassembly of the Vacuum Valve
Assembly of the Vacuum Valve

Before You Start

1. Switch off the power to the machine via the main switch.
   
   
2. Open the lower back panel after plugging out the main power cord and the 4 screws that hold the back panel to the main frame.

Tools and Accessories

Set of Allen Keys
Flat screw driver

Disassembly of the Vacuum Valve

1. Release the two clamps that hold the black flexible hoses ot the straight adaptor on the valve. (Do not attempt to open the straight vavle from its thread).
   
   
2. Disconnect the connector of the fit which contains the wiring.
   
   
3. Open the nut 3/8" which holds the vacuum valve to the main frame.
   
   
4. Plug out the flexible hose which connects the vacuum detector to the valve.

Assembly of the Vacuum Valve

1. Mantle the vacuum valve back to the main frame. Do not tighten the 3/8".
   
   
2. Connect the flexible hose from the vacuum detector.
   
   
3. Connect the mini-fit connector which connects the wiring to the valve.
   
   
4. Connect the flexible hoses to the valve and tighten the clamps.

Check

1. Activate the pump several times and check for good operation.
   
   
2. Put the film in full format on the drum. Activate the vacuum for 15 minutes and check that the vacuum pump is functioning well and the film is held to its place.