The Dolev 800 has 3 interlocks (A,B,C) which cut off power to certain parts of the
imagesetter when the left or right side service doors are opened or when the Loading
system is removed from the Imagesetter. All Imagesetter operations are disabled when an
interlock is activated or impaired.
The Cassette Film-In Detectors are located on the Film
Loading Assembly. There are three Cassette Film-In Detectors, one for each cassette. They
are activated by a magnet that is attached to the inside of the cassette. The pulse allows
the machine to recognize that the cassette is present.
Follow the steps for Removing the Loading and
Unloading Unit.
Unfasten the four detector cover screws (#143).
Remove the detector cover (#142)
Using the Diagnostics Utility, identify the cassette (1, 2 or
3) which has the defective detector. (Enter the diagnostics program by selecting
UTILITIES, MECHANICS. Select 9. Detectors from the Mechanics Menu.)
Mechanics Menu
1. Carriage
2. Roller
3. Spinner
4. Cassette
5. Feeder
6. Cutter
7. Vacuum/Valve
8. Others
9. Detectors
In the case of a defective detector in cassette # 1 or 2,
replace the right detector by unfastening the two detector screws (#80).
In the case of a defective detector in cassette # 3, replace the left detector by
unfastening the two detector screws (#80).
Fasten the two detector screws (#80).
Re-install the detector cover (#142)
Return the loading system back to its place and close the lockers.
Power on the imagesetter.
Re-Enter the diagnostics program. Select UTILITIES, MECHANICS.
Select 9. Detectors from the Mechanics Menu. Check for accurate results.
The Cassette "No Film" Detectors are located on the
Film Loading Assembly. There are three Cassette "No Film" Detectors, one for
each cassette. They are activated by four magnets that are attached to the Cassette
Central Shaft. The pulses are counted to the Cassette NVM and this information allows the
operator to be aware that no film remaining in the cassette.
Follow the steps for Removing the Loading and
Unloading Unit.
Unfasten the four detector cover screws (#143).
Remove the detector cover (#142)
Using the Diagnostics Utility, identify the cassette (1, 2 or
3) which has the defective detector. (Enter the diagnostics program by selecting
UTILITIES, MECHANICS. Select 9. Detectors from the Mechanics Menu.)
Mechanics Menu
1. Carriage
2. Roller
3. Spinner
4. Cassette
5. Feeder
6. Cutter
7. Vacuum/Valve
8. Others
9. Detectors
In the case of a defective detector in cassette # 1 or 2,
replace the left detector by unfastening the two detector screws (#80).
In the case of a defective detector in cassette # 3, replace the right detector by
unfastening the two detector screws (#80).
Fasten the two detector screws (#80). 77
Re-install the detector cover (#142)
Return the loading system back to its place and close the lockers.
Power on the imagesetter.
Re-Enter the diagnostics program. Select UTILITIES, MECHANICS.
Select 9. Detectors from the Mechanics Menu. Check for accurate results.
The cutter position detectors are located at the front of the
loading system, under the cutter shaft. The detectors are opto-switches and they detect
the left and right position of the cutter movement.
Open the loading system doors and pull out the three film
cassettes.
Open the lockers of the loading system and pull the loading
system out as much as you can while not pulling it off the tracks. Do not pull the loading
system completely out of the machine.
Disconnect the connections to the detector.
Move the cutter housing away from the detector if it is
interfering with the work.
Open the Hd cap st-st #6-32 x 1/2" screw that holds the
detector to the bracket.
The lever detectors (Cat No. 314A00010) are located on the
loading system. The lever closes the gaps between the medium film rollers and the small
film rollers. The detectors are responsible for distinguishing between closed rollers or
open ones.
Remove the light-proof covers from both sides of the unit.
Note: If the problem is with the right detector, you do not need to disconnect
the electronic harness cable connectors on the right side of the Imagesetter. Removing the
light-proof covers is enough.
Remove the E-ring that secures the top of the left lift-o-mat
piston. Tilt the piston downwards.
Open the two track locks on each side of the system.
Grasp the handles from both sides and gently pull the system
forward 10 cm.
The film spreader position detectors (#2) are photo
interrupters. They are located on the optomechanical assembly. The detectors are on the
left side of the machine, on the lower part of the drum.
Assemble the new detector with the 6x32 x 5/8" screw.
Return it to the original position: the flag passes in the center of the detector slot.
Activate the Diag/UTIL in the detectors menu and by moving a
little bit forward and backward the film spreader flag (only from the left side of the
machine to avoid twist in the film spreader shaft). See if the detector functions. (Choose
Detectors on Mechanics Menu)
Check that the detector flag is positioned correctly:
Home Pos. Moves Roller toward Home Position.
End Pos. Moves Roller toward End Position.
If the flag is not in the center of the detector, open the
screws 8x32 x 8/8" and move it to the center until you will see a response from the
detector.
