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PRINTLAB
3502
INSTRUCTION
MANUAL
Copyright © 2001 by JOBO Fototechnic, Inc. All rights reserved. No portion of this book may be reproduced in any form without express written consent from JOBO Fototechnic, Inc.
9. Operation
The PrintLab 3502 accomplishes the complete cycle of developing and fixing of the print material automatically. The time (speed) and temperature can be individually adjusted to match different types of paper and chemical needs. On starting the processor, the unit goes into the "standby " phase after completing a self check and reaching its working temperature. It will now maintain proper working solution temperatures until it is manually switched off.
Feeding In Photo Paper
Open the lid of the feed-in area. Put the paper emulsion side up, on the feed-in tray. Use the left wall of the tray as a guide to ensure that the paper is put in parallel to the transport rollers. It is essential that all papers be inserted at the left side of the feed-in tray to activate the transport motor. Push it slowly forward (the machine starts working) until the rollers start transporting the paper. As soon as you have closed the lid of the feed-in area, you can turn on the room lights. Do not feed in paper too quickly, one after another, to avoid paper overlap. The transport motor switches off approximately 20 seconds after the paper has come out. A beep indicates when the feed-in area is free for inserting the next print.In the course of normal processing of photo paper, BX becomes contaminated by CD, due to a carry-forward of the chemicals on the paper. The liquid level of tank 1 then drops and needs to be refilled with replenisher or fresh developer from time-to-time. It will also be necessary to replenish the BX with a corresponding amount of solution to keep it fresh and ready for use. If your prints show uneven development, check the CD and BX levels.
Safety Devices
When opening the cover of the unit, a safety switch turns off the drive. All heating elements are fitted with a safety temperature switch, which is activated in case the components overheat, and is turned on again automatically after cooling down to normal temperatures.Note:
When processing several prints at one time, always make sure that the last print is inserted at the left side otherwise it cannot be guaranteed that all the prints will exit the machine.10. Setting Temperature And Speed
The PrintLab 3502 comes pre-adjusted for RA-4 processing, set for 45 seconds and 35º C. If you have to adjust the timing, please note:
Processing time is measured from the time the print first enters the developer, until it first enters the bleach/fix. Since this cannot be viewed in action (the lid must be in place for the transport motor to operate, for safety reasons) the desired processing time is determined as follows. Insert the paper in the feed-in tray and start a stop-watch. Stop the watch when the beginning of the paper can be seen emerging from the paper outlet in the last pair of rollers. Then refer to the chart below.
Elapsed Time
Equal to developer time of
43 seconds
26 seconds
47 seconds
30 seconds (B/W)
67 seconds
37 seconds
81 seconds
45 seconds (RA-4)
120 seconds
70 seconds
135 seconds
80 seconds
160 seconds
90 seconds
210 seconds
120 seconds
It is possible to measure the correct temperature with the rack in place. To do so, place the thermometer at the point marked in the drawing below.
Place thermometer here to accurately measure the solution temperature. Daily Cleaning
Clean the feed-in tray with a cloth. NEVER rinse with water since this can damage the electronics located there.
Clean the angled paper guide on rack 2 with a cloth.
Check the fill level of reclamation containers and cubitainers. Fill the tanks in the processor up to their overflow level.
To reduce the formation of condensation, leave the protective lid over the feed in tray open when not actively processing prints.
Weekly Maintenance
Every week, at least 1/3 of the developer tank contents should be replaced with fresh replenisher, as needed by the exhaustion of the chemicals caused by prints you have processed. If you do not reach this level of replenishment, then you need to replace a portion of the chemicals with fresh "working-strength" solution. (Usually this involves replenisher with starter and more water.)
If you do not continuously use the processor, please contact your supplier of chemicals. They can offer you several additives protecting the chemicals from oxidation.
Every Two Weeks
Clean housing parts with a wet cloth.
Remove the racks from the processor and rinse them with running water.
Clean the filters of the CD and BX tanks and re-insert them. (They are located under the racks.) Item # 7154 – package of two filters
Note: Do not use any cleaning agents which contain solvents or chlorine, as these will cause the plastics of the machine to become brittle, and/or destroy the machine.
We recommend you use our Processor Clean II (Item #4135) to remove built-up stains from inside the tanks and heating units.
Every 3-4 Months (or when changing the process)
Drain the chemicals from all containers and tanks.
Clean containers and tanks with Processor Clean II. (Dissolve it completely in water before using it. Use 6 ounces of powder (measured in a graduate) to 5 liters of water for the CD bath, and 4 ounces of powder to 5 liters of water for the BX bath. Allow it to circulate overnight, or at least 8 hours. Longer is better.)
Drain containers and tanks of their cleaning solutions.
Rinse containers and tanks thoroughly with water. Repeat at least twice!
Drain water from containers and tanks.
Refill with fresh chemicals and run control strips for densitometric control.
Maintenance Every 12 Months
Lubricate the worm gears with silicon lubricant such as #90056 from JOBO.
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