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SERVICE GUIDE
for HP 6610xA
Power Modules



HP Part No. 5959-3364




Serial Numbers:
HP Model 66101A: US34440101 and up
HP Model 66102A: US34210101 and up
HP Model 66103A: US34210101 and up
HP Model 66104A: US34450101 and up
HP Model 66105A: US34210101 and up
HP Model 66106A: US34210101 and up



For instruments with higher serial numbers,
a change page may be included.


For instruments with lower serial numbers,
refer to Appendix A.




Microfiche Part No. 5959-3365 Printed in USA: June, 1999
CERTIFICATION
Hewlett-Packard Company certifies that this product met its published specifications at time of shipment from the factory.
Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Bureau of
Standards, to the extent allowed by the Bureau's calibration facility, and to the calibration facilities of other International
Standards Organization members.

WARRANTY
This Hewlett-Packard hardware product is warranted against defects in material and workmanship for a period of three years
from date of delivery. HP software and firmware products, which are designated by HP for use with a hardware product and
when properly installed on that hardware product, are warranted not to fail to execute their programming instructions due to
defects in material and workmanship for a period of 90 days from date of delivery. During the warranty period Hewlett-
Packard Company will, at its option, either repair or replace products which prove to be defective. HP does not warrant that
the operation of the software, firmware, or hardware shall be uninterrupted or error free.

For warranty service, with the exception of warranty options, this product must be returned to a service facility designated
by HP. Customer shall prepay shipping charges (and shall pay all duty and taxes) for products returned to HP for warranty
service. Except for products returned to Customer from another country, HP shall pay for return of products to Customer.

Warranty services outside the country of initial purchase are included in HP's product price, only if Customer pays HP
international prices (defined as destination local currency price, or U.S. or Geneva Export price).

If HP is unable, within a reasonable time to repair or replace any product to condition as warranted, the Customer shall be
entitled to a refund of the purchase price upon return of the product to HP.

LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer,
Customer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental
specifications for the product, or improper site preparation and maintenance. NO OTHER WARRANTY IS EXPRESSED
OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE.

EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER'S SOLE AND EXCLUSIVE REMEDIES. HP SHALL
NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

ASSISTANCE
The above statements apply only to the standard product warranty. Warranty options, extended support contracts, product
maintenance agreements and customer assistance agreements are also available. Contact your nearest Hewlett-Packard
Sales and Service office for further information on HP's full line of Support Programs.




2
SAFETY SUMMARY
The following general safety precautions must be observed during all phases of operation of this power module.
Failure to comply with these precautions or with specific warnings elsewhere in this guide violates safety
standards of design, manufacture, and intended use of the power module. Hewlett-Packard Company assumes
no liability for the user's failure to comply with these requirements.

GROUND THE POWER MODULE.
When installed in a properly wired mainframe, this product is a Safety Class 1 instrument (provided with a protective earth
terminal). To minimize shock hazard, the mainframe must be connected to an electrical ground. The mainframe must be
connected to the ac power supply mains through a three-conductor power cable, with the third wire firmly connected to an
electrical ground (safety ground) at the power outlet. Any interruption of the protective (grounding) conductor or
disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury.

DO NOT EXCEED INPUT RATINGS.
The mainframe is equipped with a power line filter to reduce electromagnetic interference and must be connected to a
properly grounded receptacle to minimize electric shock hazard. Operation at line voltages or frequencies in excess of those
stated on the line rating label may cause leakage currents in excess of 5.0 mA peak.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.
Do not operate the power module in the presence of flammable gases or fumes.


BEFORE APPLYING POWER.
Verify that the power module line voltage switch is set to match the available line voltage.

SAFETY SYMBOLS.

Instruction manual symbol: the product will be marked with this symbol when it is necessary for the user to
refer to the instruction manual (refer to Table of Contents) .

Indicates hazardous voltages.

Indicate earth (ground) terminal.


The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not
correctly performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING
sign until the indicated conditions are fully understood and met.

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if
not correctly performed or adhered to, could result in damage to or destruction of part or all of the
product. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and
met.


Power modules that appear damaged or defective should be made inoperative and secured against unintended operation
until they can be repaired by qualified service personnel.




3
Printing History

The current edition of this guide is indicated below. Reprints of this guide containing minor corrections and updates may
have the same printing date. New editions are identified by a new printing date and, in some cases, by a new part number.
A new edition incorporates all new or corrected material since the previous edition. Changes to the guide occurring
between editions are covered by change sheets shipped with this guide. Also, if the serial number prefix of your power
module is higher than those listed on the title page of this guide, then it may or may not include a change sheet. That is
because even though the higher serial prefix indicates a design change, that change may not affect the content of the guide.

Edition 1 . . . . October, 1993 (HP Model 6610xA)