LeCroy DA1855A Maintenance manual

Care and Maintenance
DA1855A-OM-E Rev A ISSUED: July 2002 5-1
5Care and Maintenance
CLEANING
The exterior of the amplifier should be cleaned using a soft cloth
only moistened with water or isopropyl alcohol. The use of
abrasive agent, strong detergents or other solvents may damage
the exterior of the amplifier.
CALIBRATION INTERVAL
The recommended calibration interval is one year. Adjustment
should only be performed by qualified personnel. (A Performance
Verification procedure is included in this manual.)
SERVICE STRATEGY
Defective amplifiers must be returned to a LeCroy service facility
for diagnosis and exchange. A defective amplifier under warranty
will be replaced with a factory refurbished one. An amplifier that is
not under warranty can be exchanged for a factory refurbished
unit. A modest fee is charged for this service. A defective
amplifier must be returned in order to receive credit for the
amplifier core.
Calibration adjustments require the use of specialized signal
sources which are not commercially available. Amplifiers which
do not pass the performance verification must be returned to the
factory for service.
TROUBLESHOOTING
If the amplifier is not operating properly the problem may be the
way in which it is used. Before assuming the amplifier is
defective, perform the Functional Test as described in the
Performance Verification procedure.
RETURNING AN AMPLIFIER
The procedure for returning a product for calibration or service is
as follows:
Contact your local LeCroy sales representative to find out where
to return the product. All returned products should be identified by
model number and serial number. Provide your name and contact
number and if possible describe the defect or failure. In case of

DA1855A Differential Amplifier
5-2 ISSUED: July 2002 DA1855A-OM-E Rev A
products returned to the factory, a Return Authorization Number
(RAN) should be used. The RAN can be established by
contacting your nearest LeCroy sales office, representative, or
the North America Customer Care Center.
Return shipment should be prepaid. LeCroy cannot accept COD
or Collect Return shipments. We recommend air-freighting. It is
important that the RAN be clearly shown on the outside of the
shipping package for prompt redirection to the appropriate
department.
1. Contact your local LeCroy sales or service representative to
obtain a Return Authorization Number.
2. Remove all accessories from the amplifier. Do not include the
manual.
3. Pack the amplifier in its case, surrounded by the original
packing material (or equivalent) and box.
4. Label the case with a tag containing:
•The RAN
•Name and address of the owner
•Product model and serial number
•Description of failure
5. Package the amplifier case in a cardboard shipping box with
adequate padding to avoid damage in transit.
6. Mark the outside of the box with the shipping address given
to you by the LeCroy representative; be sure to add the fol-
lowing:
•ATTN: <RAN assigned by the LeCroy representative>
•FRAGILE
7. Insure the item for the replacement cost of the product.
8. Ship the package to the appropriate address.
RETURNING AN AMPLIFIER TO A DIFFERENT COUNTRY
In order to avoid customs duty for purchase price of a new
amplifier, when your amplifier is returned for service, please use
the following procedure.
In addition to the items mentioned above in ‘Returning an
Amplifier’, you’ll need to mark shipments returned for service as a

Care and Maintenance
DA1855A-OM-E Rev A ISSUED: July 2002 5-3
‘Return of US manufactured goods for warranty repair/
recalibration’. If there is a cost involved in the service, put the cost
of the service in the value column and the original value of the
product at time of purchase in the body of the invoice marked ‘For
insurance purposes only’. Be very specific as to the reason for
shipment.
Duties may have to be paid on the value of the service.
####

DA1855A Differential Amplifier
5-4 ISSUED: July 2002 DA1855A-OM-E Rev A
BLANK PAGE