Zeiss humphrey HFA II-i series, Field Service Manual

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General Information Humphrey Field Analyzer II - i
Confidential and Proprietary
Field Service Guide
1 - 6 52235C1105
If a repair is required to render the instrument operable, and as long as the repair
does not affect the original light intensity data, the repair can be performed and
then the
Before
data can be acquired.
The following repairs will affect light intensity data:
•
Hard Drive replacement or initialization;
• cleaning or replacement of the ND wedges, color wheel
*
, or brightness
detector;
• replacement of the Motor Driver PCB.
* Note - Cleaning or replacing the color wheel will not affect the white/white
Before light intensity data; it only affects the blue light intensity data.
2. Perform the needed instrument service.
This step includes any parts replacement, adjustments, calibration, cleaning, etc.
to repair, update and/or upgrade the instrument.
3. Obtain the
After
light intensity instrument data (4.8.1) if the
Before
data was not within
specifications, or if something was done during service that affects light intensity (see list
in step 1).
When instrument service has been fully completed (but before reinstalling the
outer covers), a final evaluation of the instrument may be required (see Section
2.1, System Checkout). During this step, the
Before
and
After
light intensity data
are compared. If necessary, a Calibration Notice is given to the customer.
1.3.3 HFA II - i Field Service Paperwork Requirements
The following guide identifies the paperwork that must be completed and sent to Carl Zeiss
Meditec Customer Service following each service call or preventive maintenance visit on the
HFA II - i by U.S. Domestic service engineers. For all service engineers, this guide
identifies actions essential to properly perform various types of service calls on the HFA II - i .
For all service calls:
G
FSR
G Before
Foveal ‡
If replacing/initializing Hard Drive; cleaning/replacing brightness detector, ND wedges, or
color wheel; or replacing Motor Driver PCB:
G
If obtainable, include all items from list above under
"For all service calls,"
plus items
listed below under
"Additional if light intensity recalibration is required"
. If possible,
obtain
Before
paperwork prior to the repair.