![background image](http://html1.mh-extra.com/html/zeiss/humphrey-hfa-ii-i-series/humphrey-hfa-ii-i-series_field-service-manual_3332218444.webp)
ÚÚÚ
PROPRIETARY and CONFIDENTIAL
ÚÚÚ
SERVICE
BULLETIN
Instrument:
Humphrey Field Analyzer II-i
No.:
FA2i-024A
Subject:
Stepper Motor Errors
Date:
27 Jul 07
Status:
Informational
Pages:
1
This bulletin replaces Service Bulletin FA2i-024
Problem
Intermittent
stepper motor
errors and
check stepper motors and lamp
errors.
Cause
Glue contamination on the aperture wheel shaft may be one cause of the
stepper motor
errors and
check stepper motors and lamp
errors. The glue on the aperture shaft increases friction between the
aperture shaft and the carriage assembly. The additional friction can make it difficult or impossible for the
motor to rotate the wheel to the correct position, thus causing an error.
Solution
Changes have been made to the manufacturing process of the aperture wheel assembly. Gluing the
shaft to the hub has been replaced with press fitting the shaft to the hub.
Instruments that have been manufactured with the press fit aperture start with the following serial
numbers:
720i-5920
740i-11702
745i-4615
750i-9549
Summary of Contents for humphrey HFA II-i series
Page 4: ......
Page 179: ......
Page 235: ......
Page 236: ......
Page 237: ......
Page 238: ......
Page 239: ......
Page 240: ......
Page 424: ...Page 4 FA2i 013A PROPRIETARY and CONFIDENTIAL...
Page 502: ...FA2i 041 Page 3 Figure 2 Press rectangle in Top Left corner...
Page 516: ...Page 2 FA2i 046 Figure 1 Glass Film Wedge Detectors P N 67417 Note Spacing Washer Placement...
Page 517: ...FA2i 046 Page 3 Figure 2 Y Motor Turret Detector P N 67418 Note Spacing Washer Placement...