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PBHEWLETT
PACKARD

SERVICE INFORMATION FROM HEWLETT-PAC..,. .-
JANUARY/FEBRUARY 1984

Preregulation to Reduce Power Dissipation

dc power supplies

Don Fielder, Hewlett-Packard

One of the major considerations
given a linear supply is the internal
power dissipated by the series reg-
ulator. Figure 1 shows a simple
diagram of a fixed input power sup-
ply. If this were a 50-amp supply
such as the HP 6269B DC Power
Supply operated at full current and
minimum voltage (RL shorted), the
c power dissipated in the series reg-
ulator would be about 2.5 KW Figure 1. Sample fixed input power supply.
(Vin-Vout X 50A).

Since the practical power limit for a
TO3 transistor is about 50 watts, this
would mean using 50 transistors for
the regulator-a prohibitive solu-
tion both from an initial cost and the
reduced operating efficiency that
would result.

Figure 2 shows one approach to solve
this problem. By monitoring the
voltage across the series regulator
and adjusting Vin to maintain the
regulator voltage at about 3 volts,
the power is reduced from 2 5 KW to
.
150 watts. This 3-volt regulator
voltage is held relatively constant
regardless of input o r output
conditions.

Keep this i n mind when trou-
Figure 2. Sample regulator solution.
bleshooting a unit that has no con-
trol (either locked up or down). In
(- almost every case, if you have any
output, the preregulator is probably the preregulator. ONLY when you
operating properly. If you have no have BOTH no output AND no reg-
output but do have regulator voltage ulator voltage (<1 volt) should you
(3 to 6 volts), again no problem with suspect the preregulator.

Pub. NO. 5952-01 16 @ Hewlett-Packard 1984
WWW.HPARCHIVE.COM
_I - -.- _c--
Got a Scratch That Needs Repairing?
Use HP Touch-up Paint our older and some newer instru- also identify System I cabinets by
ments. It is very close in shading their handles. The handles are an
Hewlett-packad stocks touch-up to Cocoa black, except the olive has integral extension of t h e
paint in air-drying aerosol spray a little more aluminum side frame.
cans. The available colors match (Early Design)
nearly all standard HP instrument Jade Gray (6010-0542)
Blue Gray (6010-0805)
cabinets and front panels. Use the Jade gray is sometimes used as an Really old instrument enclosures
following guidelines for ordering the accent around groups Of are a distinctive blue gray and are
appropriate colors. It is also the color of most of the
knobs. Jade gray is considerably usually wrinkled like vinyl.
Front Panels darker than mint gray.
Application
Mint Gray (6010-0813) Surface preparation and the actual
Most front panels on our newer Cabinets
Cabinets are the enclosures for the application of spray paint is an en-
instruments are mint gray. You tire subject in itself. Therefore, it is
can identify it as a light creamy instruments. Discounting the obso-
lete H P instruments t h a t a r e beyond the scope of this article to
color. describe detailed surface prepara-
redish/brown in color, there are
three basic cabinet colors: tion and painting procedures. How-
Light Gray (6010-0035) ever, for minor scratches, we can
Front panels on our older instru- System I1 design - Moss Gray
recommend that you clean the area
ments are a light bluegray. In- System I design - Olive Gray with a solution of water and alcohol
struments with this color of front Early design - Blue Gray and apply the paint with a small
panel sometimes have matching stick or &-tip. Beyond this, proceed
cabinets in a darker blue gray. (System I1 Cabinets) at your own risk.
Moss Gray (6010-0801)
Cocoa Black (6010-0927) Molded cabinets and newer in- Ordering
Cocoa black is sometimes used as strument cabinets are moss gray. You can order these paints through 0 1 " 7

a n accent color on the front panels You can identify System I1 the Mail Order Department at the
of our newer instruments. It has a cabinets by their handles. The Hewlett-Packard Corporate Parts
little less blue in it than the olive handles are separate pieces, flared Center, or through your local
black. As a general guideline, use outward and attached to the edges HP saledservice office.
cocoa black touchup when the of the front panel.
front panel is mint gray. For direct mail ordering write to:
(System I Cabinets) Hewlett-Packard
= Olive Black (6010-0812) Olive Gray (6010-0814) Mail Order Department
Olive black is sometimes used as Older instrument enclosures are P.O. Box 7220
a n accent on the front panels of painted with olive gray. You can Mountain View, CA 94043

Safety-Related Service Notes
Service Notes from HP relating to notes on the service note order form the voltmeter is electrically isolated
personal safety and possible equip- at the back of Bench Briefs, each from both the "high" and the "low"
ment damage are of vital importance appropriate number is highlighted input terminals. When the volt-
to our customers. To make you more by being printed in color. meter contains an internal battery
aware of these important notes, they and the battery mode is used, this
are printed on paper with a red bor- 419A DC Null Voltmeter outer enclosure is not grounded.
der, and the service note number has
a "-S" suffix. In order to make you Several of the voltmeters produced One example is the HP419ADC
immediately aware of any potential by Hewlett-Packard have the capa- Null Voltmeter. I t was designed
safety problems, we are highlighting bility t o make a floating voltage with a metal case that necessitated
safety-related service notes here measurement (i.e. measure a voltage special precautions to maintain the
with a brief description of each prob- t h a t is not referenced to e a r t h DC isolation. Short screws are used
lem. Also, in order to draw your at- ground.) To accomplish this mea- to attach the side covers to the outer
tention to safety-related service surement, the grounded enclosure of framework. If, by any chance, the

2 BENCH BRIEFS JANUARY-FEBRUARY 1984
WWW.HPARCHIVE.COM
side covers have been removed and

r 3)
then replaced with the wrong length
screws, it is possible for the longer
screws to short the LOW input ter-
minal to the outer chassis in the bat-
tery mode. This would allow the low
terminal's voltage t o be conntected
to the outer chassis resulting in a
possible shock hazard to the
operator.

The correct length screws are 0.188
inch, 6-32, flat head screws. For
more information, order Safety Serv-
ice Note 419A-13-S.

8080A Data Generator

8160A Programmable Pulse
Generator
Model 419A DC Null Voltmeter
8161A Programmable Pulse

'
Generator
There is a possibility that the line 2. Using an ohmmeter, check that If your instrument is not wired cor-
) fuse may be wired into the neutral there is 0 ohms between the line rectly, order Safety Service Notes
(return) side of the line supply on terminal (L) of the line connector 8080A-l-S, 8160A-743, and/or
some of the above instruments. To (Jl)and the tip of the fuse. 8161A-3-S f o r t h e rewiring
check your instrument, perform the procedure.
3. If this is correct the instrument is
following test.
wired correctly and no further ac-
1. Remove the power cord and fuse tion is required.
cover.

8160A Programmable Pulse Generator

JANUARY-FEBRUARY 1984 BENCH BRIEFS 3
WWW.HPARCHIVE.COM
f7
HEWLETT 1984
PACKARD Customer Service Training Calendar

January, 1984

Learn Service Skills Through In-Depth Technical Instruction
Hewlett-Packard service training courses are designed to Ordering Instrument Service Training is easy. Simply
provide in-depth technical instruction for maintenance contact your local HP Field Representative and tell him
personnel seeking the skills needed to troubleshoot, repair, or her which courses you wish to attend. If you require
and maintain HP instruments and instrument systems. a course on an instrument or instrument system not listed
Course concepts are taught through a balance of theory on the calendar below, ask your Field Representative if
and practical, hands-on exercises. a special arrangement can be made.

Customer Service Training Calendar

Tuition

Content Dates Location
Per
Student
'7
Logic Systems
HP 64000 Logic May 7-11 Logic Systems Division
Development System Oct 22-26 Colorado Springs, CO

Scopes & Displays
HP 1630A/D Logic Mar 7-9 Colorado Springs Division
Analyzer Colorado Springs, CO $900
Apr 3-5 Beoblingen, Germany $900
Jun 26-28 Colorado Springs Division $900
Sep 11-13
HP 1600 Series Mar 21-25 Winnersh, United Kingdom $1200
Logic Analyzers
HP 1980 Oscilloscope May 21-25 Geneva, Switzerland $1200
Measurement System Oct 29-Nov 2 Colorado Springs Division $1200
HP 1700 Series Nov 5-9 Colorado Springs Division $1100
Oscilloscope
HP 1300 Series Nov 12-14 Colorado Springs Division $ 650
Displays
HP 1351A, 52104A, Nov 15-16 Colorado Springs Division $ 450
52105A, 52106A
Graphics Generator

4 BENCH BRIEFS JANUARY-FEBRUARY 1984
WWW.HPARCHIVE.COM
Automatic Test
Feb 6-17 Manufacturing Test Division $2100
/ HI' 3060A/61A/62A
1 Board Test Systems Apr 23-May 4
Jul 9-20
Loveland, CO

Sep 24-0ct 5
Dec 3-14
HI' 3065C Board Jan 30-Feb 10 Cupertino, CA $3400
Test System Mar 12-23
Apr 23-May 4
Jun 11-22
Jul 23-Aug 3
Aug 20-31
* HI' 3065H Board Jan 9-20 Manufacturing Test Division $3400
Test System Mar 5-16
Apr 30-May 11
Jul 9-20
Sep 10-21
NOV 5-16
HI' DTS-70 Board Feb 27-Mar 2 Kirkland, WA $1200
Test System Apr 30-May 4
Jul 23-27
OCt 1-5

RF & Microwave
HP 435A/436A Sep 10 Stanford Park Division, Palo Alto, CA $ 225
HI' 3047S/R/M Oct 19 Spokane Division, Spokane, WA $ 225
HI' 8640A/8640B Oct 8-10 Spokane Division $ 675
(Opt. 004)
HI' 8656A Oct 11-12 Spokane Division $ 450
HI' 8660A/B/C Oct 1-2 Spokane Division $ 450
HI' 8662A/8663A Oct 3-5 Spokane Division $ 450
HI' 8672A Sep 11-12 Stanford Park Division $ 450
HI' 8901A/B/8902A O C t 15-17 Spokane Division $ 675
H '8903A
I Oct 18 Spokane Division $ 225
H '8970A
I Sep 13-14 Stanford Park Division $ 450

Communications Test
Datacom Concepts Mar 12-14 Colorado Telecommunications Division $ 675
Apr 30-May 2 Geneva, Switzerland $ 675
Datacom Concepts Sep 17-18 Colorado Telecommunications Division $ 450
(Short Version) NOV 5-6 Amsterdam, The Netherlands $ 450
HI' 4955A Protocol Mar 19-23 Colorado Telecommunications Division $1125
Analyzer May 7-11 Geneva, Switzerland $1125
HI' 4945A TIMS Jan 16-18 Mountain View, CA $ 675
Mar 12-14 Colorado Telecommunications Division $ 675

For more information, call your local HP Sales Office or nearest Regional Office: Eastern (201) 265-5000; Midwestern (312) 255-9800; Southern (404) 955-1500; Western (213) 970-7500;
Canadian (416) 676-9430 Ask the operator for instrument sales Or write Hewlett-Packard, 1620 Embarcadero Road, Palo Alto. CA 94303. In Europe: Hewlett-Packard S.A., 7, rue du
Bois-du-Lan. PO. Box, CH 1217 Meyrin 2, Geneva, Switzerland. In Japan: Yokogawa.Hewlett-Packard Ltd., 29.21, TakaidoHigashi 3-chome, Suginam1.k". Tokyo 168.
Printed in U . S . A . 1/84
Specifications subject to change without notice. 5953-9606

JANUARY-FEBRUARY 1984 BENCH BRIEFS 5
WWW.HPARCHIVE.COM
410C ELECTRONIC VOLTMETER 3421A DATA AQUlSlTlON/CONTROL UNIT
I
.;loy:lement to 41OC-24. Serials from 098A22439 to 098A23564.

419A DC NULL VOLTMETER
3421A-16. All serials. Semi-automated performance
verification and calibration procedures.
3421A-2A. All serials. 44462A actuator/multiplexer
jumper configuration. C'
41 9A-12. Replacement neon subassembly for photo-
chopper assembly. 3421A-3A. All serials. Transfer of boards from the
419A-134. All serials. Possible shock hazard when United States and Canada.
making a floating voltage measurement in battery 3455A DIGITAL VOLTMETER
mode. 3455A-22A. Serials 1622A12900 and below. Recom-
mended replacement of terminal assemblies.
436A POWER METER
436A-8. Serials 1938A04951 through 2101A12441. 3456A DIGITAL VOLTMETER
Need Any Service Modificationto eliminate ground loop problem. 3456A-18. Serials 2201A08690 and below. Recom-
mended replacement washers on A20 assembly.

Notes? 853A SPECTRUM ANALYZER DISPLAY
853A-4. All serials. Front panel replacement kits.
3495A SCANNER
3495A-88. Notification to obsolete service note
853A-5. Serials 2244A and below. Firmware revision
3495A-8.
to make 853A compatible with HP 7475A plotter.
They're free! 3495A-9A. All serials. 20 channel test connector
853A-6. Serials 2244A00685 and below. Circuit board
operation.
modification when replacing transistor A8Q4.
853A-7. All serials. Suppression of power supply os-
Here's the latest listing of Service cillations.
3497A DATA ACQUlSlTlONlCONTROL UNIT
3497A-88. All serials. Customer spare parts recom-
Notes. They recommend modifica- mendations.
tions t o Hewlett-Packard instru- 1220A OSCILLOSCOPE 3497A-13. Modifications to prevent intermittent
1220A-26A. Serials 1341A through 1709A. Recom- turn-on failures and/or front paneliinterface lock-
ments t o increase reliability, mended replacement for coupler shafts MP25 and ups.
improve performance, o r extend intensity and focus potentiometers, A3R9 and R14. 3497A-14. Recommended fuse replacement for 50 Hz
operation.
their usefulness. 1222A OSCILLOSCOPE 3497A-15. Recommended input relay replacements
1222A-6. Serials 1341A through 1718A. Recom- for voltmeter option.
Use the order form at the rear of mended replacement for coupler shafts MP25 and
intensity and focus potentiometers, A3R9 and R14. 3581AlC WAVE ANALYZER
Bench Briefs to order, free of charge, 3581AiC-10. 3581A serials 1351A02699 and below:
3581C serials 21 14A01834 and below. Modifica-
individual Service Notes document- 1345 DIGITAL DISPLAY tion to prevent digital display failures.
ing several instruments. 1345A-3. Serials 2331A and below. Model changes
and compatibility between vintages of 1345A's. 3710A lF/BB TRANSMITTER
3710A-23A. Serials 184911-02471 and below. Im-
If you would like to purchase large 16408 SERIAL DATA ANALYZER proved cooling by retrofitting larger fan.
quantities of Service Notes covering
a wide range of instruments, or if
16406-4. Serials 2231A and below. Recommended
replacement matrix board assembly. 3712A IF/BB RECEIVER
3712A-9. All serials. EHT derived baseband ripple on
1TC
1645A DATA ERROR ANALYZER 55kHz options (210, 211, 212 and 221).
you desire a complete history of all 1645A-9. All serials. Modification to adapt 10388A 3712A-10. Serials 2243U-00492 and below. Recom-
Service Notes documenting all interface to V.35 modems other than Bell type 306. mended insulator to prevent possible shorting be-
changes to your instruments, Hew- tween A30 assembly and CRT shield.
1803A DIFFERENTIAL/DC OFFSET
lett-Packard offers a microfiche li- AMPLIFIER 3717A 70MHZ
brary for a modest, one time charge. 1803A-1, All serials. Recommended replacement S3 MODULATOR/DEMODULATOR
thumbwheel switch assembly. 3717A-3. All serials. Preferred replacement for A6U1.
There is also a microfiche subscrip- 371 7A-4. All serials. Preferred replacement for
tion service available that automat- 1965A GATED UNIVERSAL COUNTER A14 U5.
ically updates the library on a 1965A-1, Serials 2310A-00229 and below. Modifica- 3746A SELECTIVE LEVEL MEASURING SET
tion to eliminate hard key pressure. 3746A-7. All serials. Preferred replacement for A68
quarterly schedule. bus transceiver HP part number 1820-1689.
3060A BOARD TEST SYSTEM 3746A-8. Serials 232011-00371 and below. Preferred
3060A-238. All serials. System support package for replacement for capacitor C3 to prevent irregular
The part numbers for the microfiche 3060A Board Test System. resets to the 3746A processor.
library and subscription service are: 3746A-9. All serials. Preferred replacement for diode
3065 CIRCUIT TEST SYSTEM CR3.
3065-1. Serials 2310-001 13 and below. Modification 3746A-10. All option 013 instruments. Preferred re-
Library of to prevent power-up circuit oscillation. placement for A41 E l .
Service Notes- 5951-6511 3065-2. All serials. Recommended relay replacement
procedure. 3747A/B SELECTIVE LEVEL MEASURING
Subscription service- 5951-6517 3065-3. New ASRU AID Board Blue Stripe part SET
number. 3747AiB-25A. Serials 214311-00136 and below. A31 5
3065-4. All serials. 30656 fan speed sensor failures. broadband power detector-Thermopile Protection
Contact your local HP Sales Office 3065-5. Serials 21 10-00113 and below. Modification Retrofit Kit.
for ordering information. of 11352-66507 and 11353-66508 to allow fixture 3747AiB-28. All serials. Preferred replacement for
verification. A2031C1 or A202A21C2.

3253A ANALOG STIMULUS/RESPONSE 3763A ERROR DETECTOR
UNIT 3763A-7A. Serials 21 5OU-00800 and below. Preferred
400E/EL AC VOLTMETERS 3253A-8. Modificationto reduce intermittent and reoc- replacement for A141C27 (1820-1755) and 03763-
400E-14. Serials 1208A29188 and below. Preferred curring ASRU failures. 601 14 (timer assy.).
replacement of transistors A2Q14, A2Q15, and
A2Q16.
400EL-1. Serials 2214A29268
replacement of transistors
and below. Preferred
A2Q14, A201 5, and
3335A SYNTHESIZER
3335A-9. Serials 1640A01900 and below. Modification
to cure intermittant display blanking and random
3771B DATA LINE ANALYZER
3771AiB-27. 3771A serials 233211-00450 and below:
3771B serials 233211-00178 and below. Possible
f-
A2Q16. control. HP-IB intermittent type problems caused by in-
struments overheating.
4OOFIFL AC VOLTMETERS 3400A RMS VOLTMETER 37716-26. Serials 2227U-00168 and below. Modifica-
4OOFiFL-8. Serials 734-01526 and above. Preferred 3400A-14. Serials 2225 and below. Recommended tion to prevent possible frequency count error ai
replacement for transistor A2Q1, replacement for the chopper amplifier. -40dBm when set in the frea. measurement mode.

6 BENCH BRIEFS JANUARY-FEBRUARY 1984
WWW.HPARCHIVE.COM
3777A CHANNEL SELECTOR 5420AlB DIGITAL SIGNAL ANALYZERS 8970A NOISE FIGURE METER
3777A-1A. All serials. Recommended replacement 5420A-29. All serials. 5420A cartridge tape incom- 8970A-3. Serials 2222A and below. Preferred re-
relay to improve reliability. patibility. placement for driver board and battery.
3777A-2A. All serials. Preferred replacement for 54208-2. Serials 2304 and below. 54206 cartridge
assemblies A4, A5, A6. A7. A8. tape incompatibility. 91 11A GRAPHICS TABLET MAIN PCA
REVISION
5423A DIGITAL SIGNAL ANALYZER 9111A-2. Serials 2251A and below. Extended war-
3779AlB PRIMARY MULTIPLEX ANALYSER 5423A-3. Serials 2304 and below. 5423A cartridge ranty policy.
3779A-26A. All serials. Modification to prevent inter- tape incompatibility.
mittent incorrect operation of frame alignment 9571 DTS-70
measurement. 8080A DATA GENERATOR 9415A-2. All serials. 94151A programmable driver/
3779A-28. All serials. Preferred replacement of Hori-
8080A-1-S. All serials. Modification to prevent possi- comparator (PRGH) card. OP-AMP history and
zontal Sweep Sync Driver I.C. A32 U2.
ble shock hazard; L1 line filter wiring. warranty status of U1-U15.
37798-29. All serials. Preferred replacement of Hori-
zontal Sweep Sync Driver I.C. A32 U2.
8160A PROG. PULSE GENERATOR 37201A HP-IB EXTENDER
8160A-3. serials 1804G00181 and below, and serials 37201A-5. Serials 2232U-01891 and below. Modifica-
3779ClD PRIMARY MULTIPLEX ANALYZER 1903G00211 and below. Power supply modifica- tion to eliminate oscillator start-up problem.
3779C-5. All serials. Service accessories for perfor- tion to improve performance.
mance tests. 8160A-4. All serials. Section troubleshooting. 37214A SYSTEMS MODEM CARD CAGE
3779C-12. Serials 2235U-00308 and below. Preferred 8160A-6. Serials 2047G00596 and above. New driver 37214A-1. Firmware update
replacements-Al/A9/Al5/A16/A18/A31/A37. transformer for power supply regulator board A1 1
3779D-12. Serials 2235U-00243 and below. Preferred T l O l HP P/N 08160-61103. 64000 LOGIC DEVELOPMENT SYSTEM
replacements-Al/A9/A15/A16/A18/A31/A37. 8160A-7-S. All serials. Modification to prevent possi- 64000-OE. Service note index.
ble shock hazard; L1 line filter wiring.
37828 ERROR DETECTOR 64242A 68000 EMULATOR SUBSYSTEM
37826-2-A. Serials 2218U-00266 and below. Pre- 8161A PROG. PULSE GENERATOR 64242A-5. Serials 2124A and below. 68000 emulator
ferred replacement for A32 assembly. 8161A-2. Serials 2202G00256 and above. New driver enhancement for 10 MHz operation.
transformer for power supply regulator board A1 1
T l O l HP P/N 08160-61103. 64251A 280 EMULATOR CONTROL BOARD
37938 DIFFERENTIAL PHASE DETECTOR 8161A-3-S. All serials. Modification to prevent possi- 64251A-6. 280 Emulation control board repair number
37938-5. Serials 23091100456 and below. Modifica- ble shock hazard; L1 line filter wiring. 2120A1558 and below. Modification to prevent op-
tion to reduce ripple on differential phase displays
code omission upon exit from background.
at low signal levels.
8165A PROGRAMMABLE SIGNAL
G ENERATOR 645008 POSITIVE PROM PROGRAMMER
4955A PROTOCOL ANALYZER 8165A-9. All instruments. Possibility of damaged re- 645008-3. All 64501A's shipped prior to 1 Nov. 1983.
4955A-1A. Firmware upgrade to revision 1.2 Operat- lays in the event of excessive external voltage. READ errors corrected with improved interface
ing S y d l . 0 Basic from revision 1.0 and 1.1 cable.
Operating Systems. 8444A TRACKING GENERATOR
8444A-5. Serials 2126A and below. Reduction of re- 64602A TIMING ANALYZER CONTROL
5061A CESIUM BEAM sidual FM. BOARD
5061A-14. Serials 2132A01870 to 2216A02078. En- 64602A-1, Serials 2148A00580 and below. Preferred
hancing the reliability of A1 5 power regulator as- 8557A SPECTRUM ANALYZER replacement of glitch detector-1 NB4-5007.
sembly. 8557A-8. Serials 2106A and below. Front panel re-
trofit kit. 64622A 40 CHANNEL STATE ACQUISITION
BOARD
5150A THERMAL PRINTER 85588 SPECTRUM ANALYZER 64622A-1. Board number 64622-66501 only. Modifi-
SPECIAL OPTION H01 85586-30 Serials 2245A09060 and below Preferred cation to make threshold voltage independent of
51 50A-6. All serials. Improvement of circuit triggering replacement of A1 5Q17 and improved adjustment data inputs.
midnight print-out. range of A14 LIN Gain pot
85588-31 Serials 2245A and below Modification to 64623A 20 CHANNEL STATE ACQUISITION
5180A WAVEFORM RECORDER prevent frequency shift due to resolution bandwidth BOARD
5180A-6B. Serials 2220A00300 and below. Input switching 64623A-1. Board numbers 64623-66501 and 64623-
amplifier static protection and frequency bandwidth 66502 only. Modification to make threshold voltage
modifications. 8559A SPECTRUM ANALYZER independent of data inputs.
5180A-EA. Serials 2224A00350 and below. Addition 8559A-21 Serials 2340A02565 and below Prevention
of wires to the -5.2V motherboard supply lines to of short circuits in ribbon cable A2W1
improve reliability. 8559A-22 Serials 2320A03015 and below Preferred
64650A GENERAL PURPOSE
5180A-10A. Serial numbers: see table'in body of the replacements for A5C1, A5C2, A5C5, and A5C6 PREPROCESSOR
note. Firmware (ROM) revision 1.4 procedures. 64650A-1. Serials 2315, 2224, 2218 , 2207. Modifica-
5180A-17. All serials. Modification to prevent multiple tion to eliminate noise on the ground sense lines.
8565A SPECTRUM ANALYZER
cursorldisplay glitches. 8565A-9A Serials 2220A and below Preferred re-
5180A-18. All serials. 05180-60100/60500 hybrid
placement of ROM A39U6
64653A 808618088 INTERFACE CARD
shield exchange policy. 64653A-1. Serial prefix 2310A. Modification to prevent
MIN MODE or MAX MODE decode errors.
8569A SPECTRUM ANALYZER
5245L ELECTRONIC COUNTER 8569A-3B Serials 2105A00141 and below A' series 64670A 68000 INTERFACE CARD
5245L-11. All serials. Replacement kit for 10544- firmware revision 64670A-1. Serial prefix 2222. Modification to operate
60536 oscillator part number 5061-6004. with the 1630D Logic Analyzer.
8656A SIGNAL GENERATOR
5314A UNIVERSAL COUNTER 8656A-1A All serials Addition of high stability time 69750A SCAN CONTROLIPACER CARD
base 69750A-1. Serials 2204A-00406 and below. 6942A
5314A-4. 05314-60004 assembly series 2016. Modifi-
cation to improve option 001 (TCXO) performance. multiprogrammer 10 card. Reprogrammed logic
1
8672A SYNTHESIZED SIGNAL GENERATOR sequencer to correct potential skips in channel
8672A-16 Serials 2311A03100 to 231 1A03200 Mis- selections.
5328A UNIVERSAL COUNTER loaded power supply filter capacitors 69750A-2. Serials 2204A-00605 and below. 6942A
5328A-36. List of obsolete service notes. multiprogrammer 10 card. Modification to correct a
1
5328A-37. All serials. Modification to correct intermit- shortened first pulse out of the card's pacer.
8691 THROUGH 8699 RF UNITS
tent miscounting in standard 5328A universal H89-8693AiB-2, H89-8694AiB-1 H89-8695AiB-1 For
counters using HP PIN 1820-2317. 86602B RF SECTION
H89-8693A/B, H89-8694AiB and H89-8695A/B RF 866026-3. Serials 1920A01980 and below. A7 mixer
units Special replacement BWO assembly change.
5335A UNIVERSAL COUNTER
5335A-16. List of obsolete service notes. 8956A SYSTEM INTERFACE 86603A RF SECTION
5335A-17. All serials. Replacing front end Schmitt 8956A-2 Serials 2322A and below Preferred re- 86603A-5. Serials 2119A02640 and below. A7 mixer
amplifiers. placement of relay A5K16 assembly change.

JANUARY-FEBRUARY 1984 BENCH BRIEFS 7
WWW.HPARCHIVE.COM
Service Note Order Form
If you want service notes, please
check the appropriate boxes below
For European customers (ONLY) Name r"
and return this form separately to Hewlett-Packard Firm
one of the following addresses. Central Mailing Dept. Address
P. 0. Box 529
Hewlett-Packard Van Hueven Goedhartlaan 121 City
1820 Embarcadero Road AMSTELVEEN-1134
State Zip -
Palo Alto, California 94303 Netherlands

0 400E-14 0 3065-2 0 3712A-9 0 3779D-12 0 8080A-1-S 0 8956A-2 b

0 400EL-1 0 3065-3 0 3712A-10 0 3782B-2A 0 8160A-3 0 8970A-3
0 4OOFlFL-8 0 3065-4 0 3717A-3 0 3793B-5 8160A-4 0 9111A-2
0 41OC-24 0 3065-5 0 3717A-4 0 4955A-1A 0 8160A-6 0 37201A-5
;
0 419A-12 0 3253A-8 0 3746A-7 0 5061A-14 0 8160A-7-S 0 37214A-1

0 419A-13-S 0 3335A-9 0 3746A-8 0 5150A-6 0 8161A-2 0 64000-OE
0 436A-8 0 3400A-14 0 3746A-9 0 5180A-6B 0 8161A-3-S 0 64242A-5
0 853A-4 0 3421A-lB 0 374649-10 0 5180A-8A 0 8165A-9 0 64251A-6
0 853A-5 0 3421A-2A 0 3747AIB-25A 0 5180A-10A 0 8444A-5 0 6450053
0 853A-6 0 3421A-3A 0 3747AlB-28 0 5180A-17 0 8557A-8 0 64602A-1

0 853A-7 0 3455A-22A 0 3763A-7A 0 5180A-18 0 85588-30 64622A-1
0 1220A-26A 0 3456A-18 0 3771AlB-27 0 5245L-11 0 85588-31 0 64623A-1
0 1222A-6 0 3495A-8B 0 37718-26 0 5314A-4 0 8559A-21 0 6465OA-1
0 1345A-3 0 3495A-9A 0 3777A-1A 0 5328A-36 0 8559A-22 0 64653A-1
0 16408-4 0 3497A-88 0 3777A-2A 0 5328A-37 0 8565A-9A 0 6467OA-1

0 1645A-9
0 1803A-1
0 1965A-1
0
0
0
3497A-13
3497A-14
3497A-15
0 3779A-26A
0 3779A-28
0 3779B-29
0 5335A-16
0 5335A-17
0 542OA-29
0
0
0
8569A-38
8656A-1A
8672A-16
0
0
6975OA-1
69750A-2
866028-3
r
0 3060A-23B 0 3581AIC-10 3779C-12 0 54208-2 0 H89-8693AlB-21 0 86603A-5
0 3065-1 0 3710A-23A 0 3779c-5 0 5423A-3 H89-8694AlB-11 0 94151A-2
H89-8695AIB-1

Please photocopy this order form if you do not
want to cut off the page

Bulk Rate
U S Postage

Sunnyvale, CA
Permit No
I

8 BENCH BRIEFS JANUARY-FEBRUARY 1984
WWW.HPARCHIVE.COM

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