CONTRACT(Sanitized)MLT 1540-1 THROGHT-5

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05171A000400030023-5
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: June 6, 2005
• Sequence Number: 23
• Publication Date: October 13, 1971
• Content Type: LETTER

Approved For Release 2005/06/23 CIA-RDP78B05171A000400030023-5
~TAT
1. Y Bide Drive Motor
Correspondence with the motor manufacturer has indicated the probability.
of material -between the commutator'se ments causing partial shorting.
in speed or inability to drive the bridge have been traced jo.a deposit.
.Several failures of the Y bridge'drive -motor manifested as a reduction
by the motor rrcriufacturer on future units.'Attcchment 1 it a procedure
of excessive. oiling at manufacturer.;_Corrective action is be.ing.taken
6TA' T
describing the discssembly.and caeaning of the commutator for.correction.
of the problem as it occurs in the field. This procedure has.been
distributed to.a_II roduct'Suppor I t personnel at
sites where MLT-1540 Lio)t,Tabl.e's'are located.
Off icar-!n -Charge
USA Communicatins Service Group
Post Office. Box 72
NAS Moffett Field, California 94035
required for you f o ?irrplerrent these changes and procedures. S,pecif ical ly thee items
Product Improvement Program we are. providing the necessary instructions and parts
required for improved. operation and reliability. In continuing,
M LT-3164-1.,6188
13 October 1971:
Analysis of maintenance data-on MLT-1540 Light Tables and d scussions'with the. users
has shown several areas where minor modifications and maintenance procedures are
referred to are as' follows:
Approved For Release 2005/06/23-:-CIA-RDP78B05171A000400030023-5
Declass review by NGA/DoD
;_STAT.
 Approved For Release 2005/06/23 : CIA-RDP78BO5171A000400030023-5
2 ~'iNn ~ICri i C". C: r Switch
Analysis of r`ailu;es o the ilm transpo+t motor ON /O i= ;.ritch and its
application in circuit indicate a desirability of a change in wiring
to increase the relicbility and reduce failures of this component.
Attachment 2 describes tr; procedure for rewiring of this switch. Also
included is the ch :; e to 'be made to the ricnuals indicating the new
vriring, -
3. Vievtinq C ass i` c'unt it":a
Replacement and cleaning of the light source lamps and lamp tray requires
the removal of the viewing glass surface, At present the frame of the
viewing glass rides on the tips of the leveling screws, Parts are presently
being procured and procedures prepared to add an improved surface for
the framework of the viewing glass to ride upon. This consists of spring
clips over the surface of the screws on which" the viewing glass framework
rides. This modification has been tested at the
and is shown to work quite satisfactorily for ease of removal and replace-
ment of the viewing glass surface. The required parts are expected from the
vendor mid-October at which time a procedure and the parts will be dis-
tributed. Installation of the.clips is very simple, being installed under
the present hardware, thus requiring no change to the tables.
We will make arrangements through our Product Support Organization to send these
instructions and the necessary parts to the users sites. Should further information be
MLT Program Manager, or the undersigned.
Very truly yours,
STATI
STAT;
Supervisor, Contract dmi n istrat ion .
WGB:hj
Attachments: 1. Field Service Procedure, Y Drive Motor P/N 37103-1,
used on MLT 1540-2, -3, -4
2. Field Service Procedure, Film Drive Power Switch (S 4)
P/N PS-50
Approved For Release 2005/06/23 : CIA-RDP78BO5171A000400030023-5