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KFORMATION
FROM HEWLETT-PACKARD
March/April 1986
Battery Charging With a Hewlett-Packard
-
Power Supply
Introduction Charge Methods
The charging and discharging of One of the most common approaches
batteries has become an area of to charging batteries is the "constant
careful study in the aerospace and current" method sometimes referred
automotive industries as well as to as a "slow charge." As the name
many others. Precise control of both implies, it typically requires 14-16
the charging and discharging char- hours to fully charge a nickel-
acteristics of batteries may be nec- cadmium cell. The charge rate for
essary in applications ranging from this method is typically O.lC, where
satellite design to battery develop- C is the nominal ampere-hour rating
Figure 1. Constant Current Charging
ment and evaluation. of the cell. At this charge rate
standard Ni-Cad sealed cells can battery to the power supply and
Although sufficient for many con- tolerate an overcharge for extended setting the proper charging rate, the
sumer applications, the comparatively periods of time without damage or charging operation can be left
poor charging control of readily avail- serious performance degradation. unattended.
able battery chargers may not provide
the precision necessary in many crit- The other charging method we will Constant Current Charging
ical applications. To achieve a high discuss is the "taper charge" method. Procedure
degree of accuracy, stability and When charging lead-acid cells, many
regulation, the dc power supply ap- manufacturers recommend that the The procedure for setting the charging
proach can be utilized. This same charging current be reduced as the rate and full charge voltage on con-
power supply, with little or no mod- charge nears completion. This "taper stant voltagelconstant current power
ification, can also be used for con- charge" can be accomplished by in- supplies is as follows:
trolled battery discharging. serting a small resistance in series
with one of the load leads between 1. Turn both the VOLTAGE and
Two different types of battery charg- the power supply and the battery CURRENT controls fully coun-
ing techniques using Hewlett-Packard being charged. terclockwise (CCW).
dc power supplies will be explained
in this article. For information on Constant Current Charging 2. Place a short circuit across the
precise control of battery discharging output terminals of the supply
using a power supply, order HP The automatic crossover between and rotate the VOLTAGE control
Application Note 250-2 from one of constant voltage and constant current fully clockwise (CW).
the addresses on the back page of exhibited by most Hewlett-Packard
this issue of Bench Briefs. The con- power supplies make them ideal for 3. Rotate the CURRENT control to
nection diagrams illustrated here are battery charging applications. Using the desired charging rate as read
typical. To ensure proper operation this feature, a battery may be charged on the front panel ammeter.
use the exact connections as illus- at a constant current until the max-
trated in the operating and service imum charge voltage is reached, at 4. Rotate the VOLTAGE control fully
manual for the power supply being which point the supply will revert CCW and remove the short circuit.
used. If the power supply and com- to constant voltage and continue to
ponents are carefully chosen the supply a trickle charge current suf- 5. Rotate the VOLTAGE control to
r e s u l t s should be more t h a n ficient to maintain full charge (see the desired full charge voltage as
satisfactory. Figure 1).Thus, after connecting the read on either the front panel
Pub. NO. 5952-0124 @ HEWLElT-PACKARD 1986
WWW.HPARCHIVE.COM
voltmeter or a more precise DVM.
Remember to set the voltage 0.7
volts more than the required full
charge voltage to compensate for
the drop across diode CRp. The
unit may then be connected to
battery nears completion of its charge.
The resistor Rt accounts for the taper
charge. The value of this resistance
is the difference between the full
charge voltage (Em) and the voltage
at which the tapering is to start
n-;+-
POWER
SUPPLY
EM=BATTERY FULLCHARGEVOLTAGE
- BATTERY
the battery terminals (positive to (Et),divided by the maximum charg- I C =CONSTANT CURFENT CHARGE
- B A T T E R Y VOLTAGE AT w n i c n
positive and negative to negative). ing current (IC). The current CHARGE RATE WILLBEGIN TO
TAPER
charging plot and the connection `C RT.LM>
TAPER CHARGE IC
Taper Charging diagram for taper charging are shown CURRENT PLOT
THE POWER RATING OF R T SHOULD
in Figure 2. Follow the same pro- BE E U L c - P R T
Taper charging means that the charge cedure for taper charging as for
current is gradually reduced as the constant current charging. 0 Figure 2. Taper Charging.
Troubleshootinn TiD
Finding Short
Circuits on Printed
Circuit Boards
Measure Minute Current Differences
with an HP3466AMultimeterorSimple
Microvolt Meter Circuit
Ike Ogilvie,
HP San Diego Diu. HP3466A
One of the hardest faults to find on are not important, it is only necessary same or slightly less than the voltage "7
a printed circuit board covered with to note whether the readings are reading at point "D."
a lot of integrated circuits is the getting larger or smaller to determine
short circuit. One simple method in which direction the current is This fifth reading shows that the
that I have found very successful, flowing. current drawn by the short circuit
even on multi-layer boards, involves is not flowing in the circuit from
using a microvolt meter, such as the As shown in Figure 2, we will use point "D" to point "E." Close ex-
HP 3466A Digital Multimeter, an the negative meter probe to make amination of the circuit layout on
ordinary 1.5 volt flashlight battery five voltage readings; the positive the board will show that there are
and a 150 ohm current limiting meter probe is connected to point no other paths for the current except
resistor. If a microvolt multimeter "A." The first reading is made at through point "D." By assuming that
with the same specifications as the point "B." Note the small voltage point " D(where we noted the highest
H P 3466A Digital Multimeter reading. Make the second voltage reading) is the short circuit, we
(1uVdc sensitivity) is not available, reading with the negative meter assume that the bypass capacitor is
refer to Figure 1, which is a schematic probe a t point "F." This voltage shorted.
of a simple microvolt meter circuit reading should be the same or slightly
t h a t c a n be constructed very less than the previous voltage reading. To prove that the bypass capacitor
economically. This second reading shows that the is shorted, refer to Figure 3. Connect
current drawn by the short circuit the battery with the 150 ohm resistor
The troubleshooting procedure for a is not flowing in the circuit from in series across the bypass capacitor
typical short circuit is shown in point "B" to point "F." Make the and connect the positive meter probe
Figures 2 and 3. The fault is a third voltage reading with the neg- ~
shorted bypass capacitor between the ative meter probe at point "C." This Correction
5 volt supply and common at point third reading will be larger than The HP 3065H service class
"D." To isolate this short, connect the two previous readings. Make the scheduled on July 7, 1986 (see
the positive side of the battery to fourth voltage reading at point "D." January/February 1986BB) has
the 5 volt bus and the negative side This fourth reading will also be larger been moved back two weeks.
with the 150 ohm resistor in series than the previous readings. Make The new dates are July 21 -
to the common bus. In observing the the fifth voltage reading at point Aug. 1.
voltage readings the actual values "E." This fifth reading will be the
2 BENCH BRIEFS MARCH/APRIL 1986
WWW.HPARCHIVE.COM
Figure 1. Simple dual ran :ircuit witt
c
L
MAtiC;HlAtWlL lYU6 BENCH BRIEFS 3
WWW.HPAKCHlVt.CUM
to point "D." Make the first voltage is flowing in the circuit away from Another good use of this method is
reading by connecting the negative point "D." All of the current is flowing to troubleshoot a low or missing
meter probe to point "C." This reading through the shorted bypass capacitor. signal at the output of an IC. For
should be almost zero volts. Make example, there is a n abnormally low
the second voltage reading by con- Using this method of troubleshooting, signal at point "b" (refer to Figure
necting the negative meter probe to I have measured a voltage drop on 4). Is IC A's output low, or is IC B,
point "E." This reading should be a printed circuit trace as short as C, or D loading the output of IC A?
almost zero volts. These last two a n eighth of an inch.
voltage readings show that no current With the power on, measure the
voltage drop from point "a" to point
"b," then from point "a" to point "c,"
and finally from point "a" to point
"d."The largest voltage would indicate
which IC is loading down the output
of IC A. If there is very little or no
voltage drops, this would indicate
that IC A has a low output. 0
Figure 4. Determining if "A's" output is low
or if "B': "C'; or "D" is loading "A's"
output.
Figure 3. Series of readings to determine that thecapacitor is shorted.
~~~ ~
B e Ogilvie has been with the
Hewlett-Packard San Diego
Division 20 years as an electronic
technician . I k e's cur rent
responsibilities with the graphics
plotters board repair group
include testing, troubleshooting
and repairing line products and
field returns.
~ 4 BENCH BRIEFS MARCH/APRIL 1986 WWW.HPARCHIVE.COM
Announcing HP Ten-Year Minimum Support:
A Further Definition of Lasting Value
fl Lasting value is an integral part of commitment includes the availability partnership. We stand behind our
every HP product. Lasting value of parts, maintenance services, products with support you can count
means enduring quality in both training, usage assistance, and a on-for the long run. 0
hardware and software as well as in whole host of other programs designed
s t r a t e g i e s t o protect t h e s e to ensure you access to the help you
investments. It also means support need in using your HP products
and service to help you get the most effectively.
out of the products and systems *A partial list of products covered by
throughout their useful lives. What's more, this backup is only a this program appears in the Support
minimum. In many special situations, Program flyer, HP PIN 5954-2830.
Now Hewlett-Packard has extended we will continue t o offer support New products will be added to the
i t s support commitment to a beyond t h i s time period. This program periodically. Contact your
minimum of ten years after active continuing effort is an extension of HP sales office for the most current
manufacture of the product*. This our larger commitment to an ongoing information.
HP Support is Full Range as Well as Long Term
Hewlett-Packard provides support agreements offering flexibility in HP solution and prolong the value of
services during the active production response time and coverage hours your investment in time as well as
of all HP products. Now, for the provide a cost-effective alternative to money.
products on the ten-year program, per-incident support at published
Hewlett-Packard provides trained rates. These support services are You can purchase all of the above
/7 professionals to deliver quality delivered through centralized services during the active production
support for at least ten years after Response Centers and local support of the products as well as during the
product discontinuance. offices throughout the world. ten year minimum support life which
begins after product discontinuance.
This support includes hardware In addition, you can obtain training They are part of an entire support
maintenance services and software and consulting services to help you program dedicated to maximizingthe
support services at various levels to make the most productive use of your value of your HP solution.
meet your needs. S t a n d a r d
If you would like to purchase large
quantities of service notes covering
a wide range of instruments, or if
ilJ you desire a complete history of all
service notes documenting all changes
mm
to your instruments, Hewlett-Packard
offers a microfiche library for a one
time charge. There is also a microfiche
subscription service available that
automatically updates the library on
a quarterly schedule.
Need Any Service Notes? The part numbers for the service
note microfiche library and subscrip-
3 They're free! increase reliability, improve perform- tion service are:
ance, or extend their usefulness. Library- 5951-6511
Subscription service- 5951-6517
Here's the latest listing of service Use the form at the rear of Bench
notes. They recommend modifications Briefs to order, free of charge, service Contact your local HP Sales Office
to Hewlett-Packard instruments to notes for several instruments. for ordering information. 0
WWW.HPARCHIVE.COM
HP 1332A/1333A X-Y DISPLAYS WITH HP 3336C (OPT 005) LEVEL GENERATOR HP 3764A DIGITAL TRANSMISSION
MEDICAL OPTION 333, 563 OR C52 3336C-17. Serials 1932A00794 through 2504A04544. ANALYZER
1332A-17. Serials 2252A19570 and below. Smoke- "On Carrier Return Loss" test failures may be due 3764A-0. Service note index.
gray CRT filters may be wrong type. to cables. 3764A-14. Serials 25281100857 and below. Clock
1333A-10. All serials. Smoke-gray CRT filters may be oscillator retrofit kit for the 3764A Std., Option 002
wrong type. HP 3421A DATA ACQUISITION AND or Option 003.
CONTROL UNIT 3764A-15. Serials 2528U00827 and below. Modification
HP 1335A X-Y DISPLAY 3421A-13. Serials 2338A04275 and below. Improved to prevent intermittent "Sc' flag display.
1335A-17A. Serials 2517A and below. Modification to case for the HP 3421A.
prevent persistence failure (flood gun illumination HP 37708 TELEPHONE LINE ANALYZER
in all modes). HP 3457A DIGITAL MULTIMETER 37708-0. Service note index.
3457A-2. Serials 2505A00710 and below. Enhancing
HP 1335A X-Y DISPLAY WITH MEDICAL the digital board to improve performance. HP 377lA/B DATA LINE ANALYZER
OPTION 333,563, C20 OR C23 3457A-3. Updated performance tests. 3771A/B-0. Service note index.
1335A-18. Serials 2515A15236 and below. Smoke-
gray CRT filters may be wrong type. HP 3466A DIGITAL MULTIMETER HP 3776A/B PCM TERMINAL TEST SET
3466A-15. Serial prefix 2549 and above and serial (Option 001)
HP 1336A X-Y DISPLAY prefix 1716 and below. System I cabinets inch/metric
1 3776A-0. Service note index.
1336A-2A. All serials. ARC Protection Kit for circuit conversion. 3776A-18B. Serials 24441100292 and below. Frequency
protection. update instructions for data measurement Option
HP 3497A DATA ACQUISITION AND 001.
HP 13368 X-Y DISPLAY CONTROL UNIT 3776A-23A. All serials. 3776 test programs data car-
1336A-3A. Serials 1809A and below. Modification to 3497A-24. Serials: voltmeter boards (03497-66505) of tridge (HP P/N 03776-10001) modifications-update
increase the range of the intensity limit adjustment. Revision C or greater. Modification to the zero offset to Revision D.
adjustment procedure. 3776A-25. All serials. Preferred replacement of RAM
HP 1349A/D DIGITAL DISPLAY HP P/N 161871614.
1349A/D-1. 1349A serials 2437A00201 and below; HP 3577A NETWORK ANALYZER 37766-0. Service note index.
1349D serials 2437A00919 and below. Modification 35WA-4A. Serials 2333A10908 and below. Masked 37768-22A. Serials 24371100742 and below. Modifi-
to prevent HV transient arc. ROMS replace EPROMS. cation to improve measurement accuracies in time-
3577A-5A. Serials 2333A11392 and below. New 5 volt slot 24.
HP 1630A/D/G LOGIC ANALYZER connector. 37768-248. All serials. 3776 test programs data car-
1630A/D/G-7. 1630A Serial prefix 2401A to 2515A; 3577A-8. All serials. Modification to improve perform- tridge (HP P/N 03776-10001) modifications-update
1630D serial prefix 2401A to 2514A; 1630G serial ance and prevent confidence test #6 failure. to Revision D.
prefix 2510A and below. Modification to protect 37766-26. All serials. Preferred replacement of RAM
trace on power supply board. HP 3586A/B/C SELECTIVE LEVEL METER HP P/N 1818-1614.
1630A/D-8. 1630A all serials; 1630D all serials. Firm- 3586A/B/C-11. Serials 1927A00798 to 2509A01285; 37768-27. Serial numbers 2437U00642 and above.
ware change from tape based mass storage to disc 1928A01179 to 251 OA03710; 1929A00553 to Retrofit instructions for adding Option H01 (quanti-
based mass storage and timing post processing. 251 1A01637. Faulty diode keeps fan on in standby. zation distortion noise measurement) to the 37768.
HP 1631A/D LOGIC ANALYZER HP 37028 lF/BB RECEIVER HP 3777A CHANNEL SELECTOR
1631A/D-3. 1631A serials 2509A and below; 1631D 37026-52. All serials. Preferred replacement for tran- 3777A-0. Service note index.
serials 2510A and below. PROM replacement to sistor A4Q7.
correct firmware. HP 3779A PRIMARY MULTIPLEX
1631A-4. Serials 2525A and below. PROM replacement HP 3705A DIFFERENTIAL PHASE ANALYZER
to correct firmware. Supersedes 1631A/D-2. DETECTOR 3779A-37. All serials. Preferred replacement for
1631A/D-5. 1631A and 1631D all serials. Clarification 3705A-8. All serials. Calibration frequency on Option assemblies A23. A24, A25 and A26.
on using probe compensation with the 1631A/D. 015 instruments. 3779A-38. All serials. Instructions for retrofitting the
1631A/D-6. 1631A serials 2525A and below; 1631D HP 3779CiD A1 assembly to the HP 3779A.
serials 2518A and below. Lost timing display in HP 3708A NOISE AND INTERFERENCE 3779A-40. All serials. Instructions for retrofitting the
mixed mode. TEST SET HP 3779C/D A9 assembly to the HP 3779A.
1631A/D-7. 1631A serials 2540A and below; 1631D 3779A-41. All serials. Instructions for retrofitting the
3708A-0. Service note index.
serials 2518A and below. Modification to protect HP 3779C/D A16 assembly to the HP 3779A.
3708A-5. All serials. Clarification of power meter linearity
trace on power supply board. 3779A-44. All serials. Instructions for retrofitting the
specification.
1631A/D-8. 1631A serials 2428A and below; 1631D HP 3779C/D A21 assembly to the HP 3779A.
serials 2424A and below. Modification to the power 3779A-46. All serials. Instructions for retrofitting the
supply primary current limit circuit to improve HP 3711A lF/BB TRANSMITTER HP 3779C/D A35 assembly to the HP 3779A.
performance. 371 1A-5. Serials 2450U00583 and below. Improving 3779A-48. Serials 00225 and below. Preferred re-
the ALC performancelswept level flatness. placement for IC U65 on the A16 assembly.
HP 30MA DATA ACQUISITION AND 3779A-49. All serials. Procedures to add complex
CONTROL UNIT impedance termination on analog ports.
HP 3712A lF/BB RECEIVER 3779A-50. Serials 2003U and below. Modification to
3054A-3. Serial numbers: All revision A units. Modifi- 3712A-12. All serials. Preferred replacement for tran-
cation to the HP 3054A LOGGER program. improve repeatability on A-A/D-A measurements.
sistor A4Q1. 3779A-51. Serials 00225 and below. Modification to
3712A-13. Serials between 24441100594 and improve adjustment range of the synthesizer clock
HP 30558 PC BASED DATA ACQUISITION 2444U00694. Modification to improve mounting of
SYSTEM frequency.
decoupling capacitor. 3779A-52. Serials 00225 and below. Modification to
305551. All serials. Modification to the 3055s UTILITY
improve adjustment range of digital transmitter clock
program.
HP 3717A 70MHz MODULATOR- frequency.
HP 3065 BOARD TEST SYSTEM DEMODULATOR 3779A-53. Serials 00205 and below. Modification to
3717A-5. Serials 25121100665 and below. Modification prevent operator failure code R27 on A-D type
3065-39. 3065H serials 2310A00518 and below. Mod- measurements.
ification to correct mis-wiring in test station terminal to protect transformer T1 secondary terminals.
3779A-55. All serials. Recommended replacement for
power cable for systems with power options 220 or IC U11 on the A13 assembly.
240. HP 3762A DATA GENERATOR 3779A-56. All serials. Modification to prevent possible
3762A-9. Serials 25431101221 and below. Modification HP-I8 problems when using the HP 2225A ThinkJet
HP 3312A FUNCTION GENERATOR to overvoltage protection circuit to improve printer.
3312A-5. Serials 1432A13975 and below. New gold performance.
plated connectors for the A1 and A2 boards. HP 37798 PRIMARY MULTIPLEX
HP 3763A ERROR DETECTOR ANALYZER
HP 3325A SYNTHESIZER/FUNCTION 37796-40. All serials. Preferred replacement for as-
3763A-7C. Serials 2150U00800 and below. Preferred
GENERATOR
3325A-20. Serials 2512A20063 and below. List of new
PC board connectors and cables.
replacement for A141C27 (1820-1755), A141C26
(1820-2040) and 03763-601 14 (timer assembly).
semblies A23, A24, A25 and A26.
37798-41. All serials. Instructions for retrofitting
HP 3779C/D A1 assembly to the HP 37798.
the f
3763A-13. Serials 2545U01186 and below. Modification
to overvoltage protection circuit to improve 37798-43. All serials. Instructions for retrofitting the
HP 3326A TWO-CHANNEL SYNTHESIZER HP 3779C/D A9 assembly to the HP 37798.
performance.
3326A-4. Serials 2437A00460 and below. Power supply 37796-44. All serials. Instructions for retrofitting the
modifications to improve performance. HP 3779CiD A16 assembly to the HP 37798.
6 BENCH BRIEFS MARCH/APRIL 1986
WWW.HPARCHIVE.COM
37796-47. All serials. Instruction for retrofitting the HP HP 37938 DIFFERENTIAL PHASE HP 5351A MICROWAVE FREQUENCY
3779C/D A21 assembly to the HP 37796. DETECTOR COUNTER
37796-51, Serials 00300 and below. Preferred re- 37936-0. All serials. Service note index. 5351A-1. Serials 2444A00125 and below. Modification
/7 placement for IC U66 on the A16 assembly.
37796-52. All serials. Procedures to add complex
impedance termination on analog ports.
37936-3A. All serials. Factory retrofit procedure for
Options 201, 211, 212 and 221.
37936-6. All serials. Modificationto improve calibration
to A6 IF amp/detector board for overload indicator.
HP 8513A TEST SET
37796-53. Serials 2015U and below. Modification to frequency on Option 015 instruments. 8513A-2A. All serials. Port 1 and 2 center conductor
improve repeatability on A-A/D-A measurements. and outer nut replacement.
37796-54. Serials 00300 and below. Modification to HP 4935A TRANSMISSION IMPAIRMENT
improve adjustment range of the synthesizer clock MEASURING SET HP 8515A TEST SET
frequency. 4935A-14. Recommended replacement parts to improve 8515A-2A. All serials. Port 1 and 2 center conductor
37796-55. Serials 00300 and below. Modification to performance. and outer nut replacement.
improve adjustment range of digital transmitter clock
frequency. HP 4936A TRANSMISSION IMPAIRMENT HP 85528 SPECTRUM ANALYZER IF
37796-56. Serials 2015U and below. Modification to TEST SET SECTION
prevent failure codes S163 or S242 on digital self-
4936A-3. Serials 23261101320 and below. Modification 85526-14A. All serials. Modification to improve 10 Hz
test 4.
to improve performance and prevent fuse blowing operation.
37796-57. Serials 00255 and below. Modification to
on the power supply.
prevent operator failure code R27 on A-D type
HP 10342BlC BUS PREPROCESSOR
measurements.
37796-58. Serials 00275 and below. Modification to
HP 4937A TRANSMISSION IMPAIRMENT 103426/C-l. All serials. Service policy clarifications.
improve power supply reliability.
TEST SET
37796-59. All serials. Recommended replacement for 4937A-2A. Serials 2523A and below. Modifications to HP 10780A MEASUREMENT RECEIVER
IC U11 on the A13 assembly. the loop-start and noise-to-ground circuits. 10780A-3. Serials 2204A13322 and below. Modification
37796-60. All serials. Modification to prevent possible to prevent J1 connector rotation.
HP-I6 problems when using the HP 2225A ThinkJet HP 4945A TRANSMISSION IMPAIRMENT
printer. SET HP 37201A HP-IB EXTENDER
4945A-6. Serials between 2435A00500 and 37201A-0. All serials. Service note index.
HP 3779C PRIMARY MULTIPLEX 2521A00800. Recommended replacement parts to 37201A-6A. Option 050. Modification to improve relia-
ANALYZER improve performance. bility of U329 voltage supply.
3779C-0. Service note index.
37790-23. Serials 00459 to 00508. Modification to the HP 5180A WAVEFORM RECORDER HP 37203A HP-IB EXTENDER
A26 assembly to prevent possible corruption of 5180A-22. All serials. Procedure to improve tracking 37203A-0. All serials. Service note index.
NVM data. loop adjustment results. 37203A-10. All serials. Notification of take control
37790-26. All serial numbers. Procedures to add asynchronous problem.
complex impedance termination on analog ports. HP 5340A FREQUENCY COUNTER
3779C-27. Serials 00404 and below. Modification to 5340A-17A. All serials. Instructions to perform Quad HP 37212A MODEM
the A29 assembly for heat protection from R10 Detector adjustment when replacing A1 Preamplifier 37212A-0. All serials. Service note index.
resistor. Assemblies.
37790-28. All serials. Modification to prevent possible 5340A-18A. All serials. Adjustment procedures to per- HP 37214A SYSTEMS MODEM CARD CAGE
HP-I6 problems when using the HP 2225A ThinkJet form when replacingthe A2 Preamplifier Assemblies. 37214A-0. All serials. Service note index.
printer. 5340A-216. All serials. Option 006 microwave limiter
retrofit instructions. HP 54100A/D DIGITIZING OSCILLOSCOPES
HP 37790 PRIMARY MULTIPLEX 54100A/D-1. 54100A all serials; 54100D all serials.
ANALYZER HP 5342A MICROWAVE FREQUENCY
Timebase board incompatibility with CPU board.
3779D-0. Service note index. COUNTER
37790-30. All serials. Procedures to add complex 5342A-35A. All serials. HP 5342A front panel replace- HP 54200A/D DIGITIZING OSCILLOSCOPES
impedance termination on analog ports. ment kit HP PIN 05342-60204.
54200A/D-2. 54200A serials 2511A and below; 54200D
3779D-32. Serials 00334 and below. Modification to 5342A-44. Serials 2508A and above. Correcting am-
serials 2513A and below. Power supply change
the A29 assembly for heat protection from R10 plitude Option 002 display jitter by modifying the
requires new cooling fan.
resistor. A27 assembly.
3779D-33. All serials. Modification to prevent possible 5342A-45. All serials. Improving the phase noise output
when a 5344s is connected to an HP 8350A Sweep
HP 59309A HP-IB DIGITAL CLOCK
HP-I6 problems when using the HP 2225A ThinkJet 59309A-8. Serials 2510A03976 to 2510A04075. Mod-
printer. Oscillator.
5342A-46. All serials. Precautions in using IC part ification to prevent reset of time display when
number 1DD8-0502 in the A3 assembly. switching to dc power.
HP 3780A PAlTERN GENERATORIERROR
DETECTOR
~
HP 64110A DEVELOPMENT STATION
3780A-0. Service note index. HP 5343A MICROWAVE FREQUENCY
COUNTER 641 1OA-10. Serials 2450A01280 through 2519A01406.
Incorrect resistor network value on CPU/IO board.
HP 3781AlB PAlTERN GENERATOR 5343A-22. All serials. Improving the phase noise output
3781A-0. Service note index. when a 53445 is connected to an HP 8350A Sweep
Oscillator.
HP 642068 6301V/6303R EMULATOR POD
37816-0. Service note index. 64206A-1. Serials 2519JOOl01 through 2519J00155
5343A-23. All serials. Improved troubleshooting pro-
cedure for A17 PRS generator assembly. (inclusive). Modification to output port signals in
HP 3782A/B ERROR DETECTOR background operation.
3782A-0. Service note index. 5343A-24. All serials. Precautions in using IC part
number 1DD8-0502 in the A3 assembly. 64206A-2. Serials 2519JOO156 through 2519JOO199
37826-0. Service note index. (inclusive). Modification to output port signals in
HP 5344s SOURCE SYNCHRONIZER background operation.
HP 3785AlB JITTER GENERATOR &
RECEIVER 53443-2. All serials. Improving the phase noise output
when a 53445 is connected to an HP 8350A Sweep
HP 64253A 280 EMULATOR SUBSYSTEM
3785A-0. Service note index. 64253A-1. Serials 2507A, CPU board 64253-66502 or
3785A-17. All serials. Preferred replacement for A39 Oscillator.
69502. Firmware change to OPCODE tracker circuit.
assembly.
37856-0. Service note index. HP 5350A MICROWAVE FREQUENCY
COUNTER HP 64671A 680916809E INTERFACE
37856-15. All serials. Preferred replacement for A39 MODULE
assembly. 535OA-1. Serials 2444A00158 and below. Modification
to A6 IF ampldetector board for overload indicator. 64671A-1. Serials 2350A and below. Modification to
eliminate invalid status and erratic J clocking.
HP 3791B BB TRANSMITTER PLUG-IN
37916-0. All serials. Service note index.
MARCHIAPRIL 1986 BENCH BRIEFS 7
WWW.HPARCHIVE.COM
Service Note Order Form
If you want service notes, please
check the appropriate boxes below
and return this form separately to
one of the following addresses.
For European customers (ONLY)
Hewlett-Packard
Nederland BV
Name
Firm
Address
r
Central Mailing Dept.
Hewlett-Packard P.O.Box 529 City
1820 Embarcadero Road 1180 AM Amstelveen
The Netherlands State zip
Palo Alto, California 94303
0 1332A-17 0 3466A-15 0 3776A-25 0 37798-47 0 3785A-0 0 5351A-1
0 133349-10 0 3497A-24 0 37768-0 0 37798-51 0 3785A-17 0 8513A-2A
0 1335A-17A 0 3577A-4A 0 37768-22A 0 37798-52 0 37858-0 0 8515A-2A
0 1335A-18 0 3577A-5A 0 37768-240 0 37798-53 0 37858-15 0 85528-14A
0 1336A-2A 0 3577A-8 0 37768-26 37798-54 0 37918-0 0 10342BlGl
0 1336A-3A 0 3586A/B/Gll 0 37768-27 0 37798-55 0 37938-0 0 10780A-3
0 1349AlD-1 0 37028-52 0 3777A-0 0 37798-56 0 37938-3A 0 37201A-0
0 1630AlDlG-7 0 3705A-8 0 3779A-37 0 37798-57 0 37938-6 0 37201A-6A
0 1630AID-8 0 3708A-0 0 3779A-30 0 37798-58 0 4935A-14 0 37203A-0
0 1631AlD-3 0 3708A-5 0 3779A-40 0 37798-59 0 4936A-3 0 37203A-10
0 1631A-4 0 3711A-5 0 3779A-41 0 37798-60 0 4937A-2A 0 37212A-0
0 1631AlD-5 0 3712A-12 0 3779A-44 0 3779GO 0 4945A-6 0 37214A-0
0 1631AlD-6 0 3712A-13 0 3779A-46 0 3779G23 0 5180A-22 0 54100AlPl
0 1631AlD-7 0 3717A-5 0 3779A-48 0 3779G26 0 5340A-17A 0 54200AlD-2
0 1631A/D-8 0 3762A-9 0 3779A-49 0 3779027 0 5340A-18A 0 59309A-8
0 3054A-3 0 3763A-7C 0 3779A-50 0 3779028 0 534OA-218 0 6411OA-10
0 3055s-1 0 3763A-13 0 3779A-51 0 3779D-0 0 5342A-35A 0 64206A-1
0 3065-39 0 3764A-0 0 3779A-52 0 3779D-30 0 5342A-44 0 64206A-2
0 3312A-5 0 3764A-14 0 3779A-53 0 3779D-32 0 5342A-45 0 64253A-1
0 3325A-20 0 3764A-15 0 3779A-55 0 3779D-33 0 5342A-46 0 64671A-1
0 3326A-4 0 37708-0 0 3779A-56 0 378OA-0 0 5343A-22
0 3336G17 0 377lAl8-0 0 37798-40 0 3781A-0 0 5343A-23
0 3421A-13 0 3776A-0 0 37798-41 0 37818-0 0 5343A-24
0 3457A-2 0 3776A-188 0 37798-43 0 3782A-0 0 5344s-2
0 3457A-3 0 3776A-23A 0 37798-44 0 37828-0 0 5350A-1
Please photocopy this order form if you do not
want to cut off the page
third troisibne
REXDALE
Volume 26 Number 2
Service information fro
Hewlett-Packard Compa
obtain a qualification form
ubscription, send your reque
above address.
eader comments or techn
contributions are welcomed.
Please send them to the
Bench Briefs Editor.
r
Editor: Jim Bechtold
Hewlett-Packard
All rights reserved Permission to reprint Bench Briefs granted upon written request lo the Editor Printed in U S A .
B BENCH BRIEFS MARCHlAPRlL 1986
WWW.HPARCHIVE.COM