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Instructions for the
PrintLab 3503
15. Faults And Their Causes
Black density of processed material too light
- Process temperature too low.
- Processing time too fast.
- Exposure time too short.
- Developer used up, lack of replenisher, replenishing rate too low.
- Prepare new working solution.
- Check replenishing rate.
Developer is contaminated with Fixer or BX
- Requires new mix of developer. All vessels need thorough washing before refilling.
Processed material too dark
- Process temperature too high.
- Processing time too slow.
- Exposure time too long.
Processed material shows stripes crosswise to transport direction, approximately 5 cm away from feed-in border
- Solution level too low. Refill up to the overflow.
Processed materials shows gray/brown shade (not fixed sufficiently)
- Processing time too short.
- Fixer/BX used up.
- Check replenisher. Prepare fresh working solution.
- Fixer/BX accumulating water.
- Processor is not level or water outlet is not properly installed. Water overflows into tank 2.
Processed material shows scratches or darker spots
- Pressure on the emulsion caused by improper handling (fingerprints, creases).
- Dirty or damaged transport rollers.
- Scratches in transport direction indicate faults on guiding elements within the rack.
- Check transport rollers individually.
- Replace mechanically damaged parts.
Inconsistent processing results with series of prints
- Enlarger not equipped with stabilized transformer.
- Exposure time too short (lamp still glows after finished exposure).
- Prints stored differently after exposure, which influences latent image.
- Processor not leveled, check level of solutions.
- Improper safe light. Run "paper fog test".
Processor does not start automatically
- Print not inserted left side.
- Drive motor defect.
Processor does not stop automatically
- Light-trap continuously "sees" prints.
Adjusted processing temperature is not reached or is reached after a long time
- Air in solution pump. Drain about two liters of chemicals and refill them again
- Defective heating element.
- Fill machine only with racks installed.
Non-parallel paper transport
- Check racks for proper position.
- Rack lock not fastened.
Magenta cast about 2.5 cm way from end of paper border
- Dirty angled paper guide between CD and BX. Dry with a cloth.
Light stripes approximately 3 cm away from paper border.
- Insufficient pressure by transport rollers.
- Check super-cushion elements and replace them if necessary.
Processing temperature exceeds set temperature
- Air in solution pump has not been evacuated properly.
- Room temperature is higher than adjusted temperature.
- Difference of temperature in adjacent solution tanks is too high. Temperature slowly adjusts through tank wall.
No circulation of solution
- Air in pump system.
- Dirty pump.
- Pump has not been assembled correctly after cleaning
- Pump defective.
Processing material is not transported properly
- Check roller pressure.
- Check rack positions, they need to be secured by lock. Processing material is not transported properly
Processing material does not come out completely dry
- Drying temperature set too low.
- Processing speed is too fast.
- Improper or used up chemicals are in use.
- Air humidity too higher or room temperature too low..
Paper sticks on drying rollers
- Moisten paper, lift rack and remove paper from roller.
If you have any questions, contact us utilizing one of the following methods:
Equipment or Processing Questions:
- Phone: Customer Service Department (734) 205-9421
e-mail: tech@jobo-usa.comRepair Questions:
- Phone: Repair Department (734) 205-9420
- e-mail: repair@jobo-usa.com
JOBO Contacts
- Telephone (734) 677-6989
- Fax: (734) 677-6963
- Postal address
- P.O. Box 3721, Ann Arbor, MI 48106
- Shipping Address
- 4401 Varsity Drive, Suite D, Ann Arbor, MI 48108
- Electronic mail
- Sales: sales@jobo-usa.com
- Equipment & Processing Questions: tech@jobo-usa.com
Repair Information: repair@jobo-usa.com- Shipping or Billing Questions: help@jobo-usa.com
Webmaster: webmaster@jobo-usa.com
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This page last updated on 03/20/02