Starting or stalling difficulties:1. Voltage too low.2. Machine not level, causing binding.3. Wiring loosened or disconnected. Calldealer.Ammonia leakage:1. Developer chamber top not properlylatched after inspection.2. Ammonia drain tube locked.3. Machine not level, preventing properdrainage.4. Ammonia bottle improperly capped.5. Ruptured pump tubing.Wrinkled prints from developer jamming:1. Condensation in ammonia chest.2. Did not use nite-sheet.3. Sensitized paper damp before using,because of humid storage.4. Paper placed in developer chamber againstthe grain.5. Foreign material in developer chamber.6. Exit not clear.Lamps burn out prematurely:1. Improper voltage.2. Air entrance blocked causing hot lamps.3. Improper or defective starters.4. Shorting in wiring.Prints do not develop:1. Weak or exhausted ammonia—replace.2. Sensitized paper old or exposed.3. Ammonia pump not operating properly—infeed tube kinked or pinched.4. Cold ammonia in supply bottle.OzalidEvery EA should have a basic understandingof the various functions of the Ozalid (fig. 3-62);therefore, in this section we will discuss printingand developing, as well as the operating principlesof the cooling and exhaust system. Informationis also given on machine operation, adjustments,and maintenance.PRINTING SECTION.—Figure 3-63showsthe principles of operation of the printing and45.296Figure 3-62.-Ozalid machine.developing sections. Of particular interest atthis point is the printing section. This sectionis divided into four basic units: light source,reflector assembly, printing cylinder, and feedbelts.During the reproduction process, the originaland a piece of material, such as paper that hasbeen sensitized (coated with a light, sensitive dye),are inserted into the machine. Sensitized materialis placed with the emulsion side up on the feed-board, and the original is placed on top. Originalsshould be of a transparent or translucent naturewith an opaque image on one side only. Feed beltscarry this material around the revolving printingcylinder where the dye of the treated paper thatis NOT covered by the opaque image of theoriginal is desensitized by the ultraviolet light raysemitted from the mercury-vapor lamp. Afterexposure, the original and print are picked off ofthe printing cylinder by the pick-off assembly, anddirected towards the developing section.After pick-off, the guide roller directs theoriginal and print between a printer and tracingseparator belt. These belts cause the print and theoriginal to be delivered to two separator tankassemblies where the original and print areseparated from each other.The process of separation is unique and istherefore worthy of further discussion. Criticalto the operation of separation are perforations inthe walls of the two separator tanks. During3-46
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business