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SERVICE INFORMATION FROM HEWLETT-PACKARD
MARCH-APRIL 1975
HOW TO REMOVE ICs side and using a vacuum device on
the other. See Figure 4. Shown here
by Dick Gasperini, Editor is a smaller vacuum device called
Soldavac. Each pin of the IC is un-
soldered in this manner, taking care
Removing integrated circuits from not to overheat the board. Too much
printed circuit boards is a problem heat will cause spots on the p.c.
that sometimes is bewildering to board, referred to as "measling".
repair personnel when initially en-
countering ICs. Here are several
I
methods that may provide an
interesting solution to your IC
removal job. FIGURE 2
I find that soldering techniques are a
vary personal subject. A method one Then each hole must be cleared of
person likes well may be hated by a solder. The most effective way I have
*
co-worker. Therefore these are found is by using a hand operated
presented to acquaint you with the vacuum device such as the
various methods that I have found Soldapullt shown in Figure 3.
helpful. Some work well in most
situations, while others work best in
unique circumstances.
CLIP OUT
FIGURE 3 is pulled free. See Figure 5. After all
leads are free, the IC should easily
This is a spring-I come out o the board with an IC
f
can be cocked an puller. See Figure 6.
the solder into the Soldapullt.
Periodically solder is removed from
this desalder device.
Some service personnel regard the IN THIS ISSUE
Fluune 1 clip out method as crude, but it is
very effective. While other methods SERVICE TIPS
One of the easiest methods to may be faster, the clip out method is
master is the "dip out"' - where easy to learn and there is minimal
each pin is cut off the IC as close as chance of overheating and damag- NEW SERVICE NOTES
possible to the body of the IC. See ing the p.c. board. Many people
Figure 1. The IC body is then ltilayer boards or
m=
removed, leaving all the pins still READERS CORNER
ldered in the board. The pi
then be removed one at a time by VACUUM DEVICE QUIZ
heating with a solder iron and pull-
ing out with needle nose pliers. See A faster method is to unsolder each
Figure 2. lead of the IC by heating it on one
*HwWt-Packard Company 1975
WWW. HPARCHIVE.COM
REMOVING ICs
Another method of unsoldering is to COMBINATION IRON
heat and pull solder from the same
side of the board, as in Figure 7. The Another iron that I like is Uniline
procedure is to heat the pin, remove Mark VII, shown in Figure 9. This is a
the solder iron, and very quickly solder iron with a hollow tip and a
move the vacuum device perpen- squeeze bulb. To use it, squeeze the
dicular to the board while pressing bulb, apply the iron to the IC lead,
the trigger. While this method is and watch for evidence of melting
satisfactory, generally more heat solder on the component side of the
must be applied than with the board. When the bulb is released,
technique in Figure 4. the solder is sucked into the iron.
FIGURE 5 After each joint the solder is ejected
The solder iron I use for these from the iron by squeezing the bulb.
Use of excessive force would All the other leads are similarly
damage the p.c. board if traces are situations in an Ungar #776 body
with a 42 watt element and chisel- done. The IC leads are then wiggled
lifted or plated-through-holes are free of the plated-through-hole and
cracked. Either of these would cause shaped point. I prefer a chisel-
shaped tip because I can heat two the IC is removed.
long-term problems with reliability
and serviceability. Philosophically pins at once on an IC. The vacuum
speaking, it is important to leave the devices can also accommodate two
electronic gear in no worse con- at a time. If operated at full line
dition afterthe repair than before the voltage, a 42 watt element would get
failure occurred. Therefore master- too hot for most p.c. boards. My
ing an effective IC removal work-bench has a variable voltage
procedure is essential. transformer with which I control the
tip temperature.
Running this element at about 80
volts seems to work well for p.c.
boards, and yet I still have enough
power (at full line voltage or above)
for fast warm-up and for ground This iron gives me the fastest results
planes on p.c. boards or wires on a of any method I've tried, although
terminal tiepoint. A simple heat con- some people prefer other techni-
trol can be constructed with a diode ques. This iron also has a 3-wire
and a switch where the diode is cord so the tip is connected to
placed in series with the iron for low ground (earth). You may be shocked
heat or by-passed for high heat (see (no pun intended) to measure the
the Nov-Dec 1973 BENCHBRIEFS). AC voltage on your solder iron tip. A
small amount of leakage can result
Any lead that cannot be wiggled is in sufficient potential to destroy sen-
still soldered to the plated-through- sitive devices such as MOSFETS.
hole and it must be unsoldered. An
easy way to do this is to solder that
lead and then again apply the
desoldering vacuum tool. Attempt-
ing to pull solder out of a half-un-
soldered hole is difficult.
FIGURE 8
More sophisticated solder irons
have built-in temperature control.
Some have a temperature sensor in
the holder so the temperature gets
monitored when the solder iron is at
rest. Others have continuous
temperature monitoring, such asthe
FIGURE 7 one shown in Figure 8. FIGURE 10
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LI
REMOVING ICs
Other manufacturers also make of its portability and small size. In INSTALLATION AND
similar irons, such as the Weller addition, the built-in light is handy CLEANING
DS40-3 shown in Figure 10. This for improved visibility.
particular model is available with More elaborate desoldering fixtures After thedefective tC is removed and
either two-or three-wire cord. are available that combine a the holes in the p.c. board are all
temperature controlled heating clean, install the new IC and solder
element with an electric vacuum into place. (Double check the orien-
LEAKAGE AND pump. While these may be the tation of the IC beforesoldering. It is
ISOLATION solution for a number of installations very embarassing to complete a
such as a manufacturing plant or a soldering operation and then realize
When repairing a piece of electronic high-volume p.c. board repair area, that the IC is in backwards.) See
gear, the chassis is almost always their lack of portability may be a Figure 13.Be certain to get each pin
connected to ground (earth), even deterent for service personnel who
with the power cord disconnected. must repair electronic gear on site.
There may be a signal generator giv- The initial investment is also rather
ing a test signal, an oscilloscope substantial.
making a measurement or a power Some solder iron manufacturers
supply providing a bias, and each offer attachments that heat all pins
instrument will be completing apath of an IC simultaneously. While
to ground. some people are happy with the
If a leaky solder iron is used, strong results, most people seem to have
currents may flow in adjacent ,trouble and end up overheating (and
circuits, causing extensive and damaging) the p.c. board.
mysterious failures.
The use of solder guns is generally DESOLDERING WICK FIGURE 13
not recommended because of the
huge transients that may be induced hot enough so solder flows up into
in sensitive circuits. the plated-through-hole. Some
And needless to say, anyone not dis- service peoplesuggest soldering the
connecting power before attempt- lead from both sides of the board.
ing a soldering operation is merely Next, clean the board with a flux
creating problems since the solder remover such as Freon TF
iron tip will be shorting the circuit to Degreaser. A small brush with short
ground. bristles can be a helpful tool. See
One way around all of this is to use Figure 14.
an isolated solder iron such as the
Wahl Cordless Solder Iron in Figure
11. This iron, which has a One other method that has some
rechargeable nicad battery sup- merit is desoldering wick, which is
plying the power, is equivalent to braided wire treated such that solder
about a 35 watt element. A com- easily flows to it. Use is simple;
bination holder and charging unit is merely place it between the solder
supplied so the iron is charged while iron and the point to be unsoldered.
not in immediate use. This iron Solder flows onto the braid. See
works very well for field use because Figure 12.
Its useon printed circuit boards with
plated-through-holes is nowhere FIGURE 14
near as effective as the vacuum
devices. However, desoldering braid A clean board is advantageous for
can be very useful in high density several reasons, one of which is a
point-to-point wiring (such as an os- reduced susceptibility to dust stick-
cilloscope) where a vacuum device ing and the resulting high humidity
won't fit. It may be helpful to keep a leakage path that would result.
small roll in your toolbox for use in Another is esthetics. It just plain
the appropriate circumstances. Best looks unprofessional to see flux
results are obtained by dipping the remaining on a board. A neat look-
wick in liquid flux immediately ing repair job is a sign of a true
FIGURE 11 before use. professional.
SOURCES OF TOOLS 8690-0082 for Soldapulldt and 8690- Osborn Mfg. Company
0126 for Soldavac). 5401 Hamilton Avenue
This article is not intended as a lis- Cleveland, Ohio 44114
ting of all the tools available for un-
Augat IC extractor (Fig. 6) (HP p/n Machinist's vice used to hold the p.c.
soldering, since there is a myriad of
8710-0585) manufactured by boards is HP p/n 8770-0004,
equipment sold. Your local elec-
tronics supply may stock the tools Augat, Inc. manuf actured by
and supplies mentioned in this 33 Perry Avenue
article. He also may be able to Attleboro, Massachusetts 02703 Steel Products
recommend o t h e r p r o d u c t s 8355 S. Chicago Avenue
available locally. Chicago, Illinois 60617
Uniline Mark VI1 (Fig. 9) (iron plus
The manufacturer's model number deluxe accessory kit, HP p/n 8690- This article copyrighted 1975 by
and address are included for the 0089) manufactured by Richard E. Gasperini for publication
tools mentioned in case your local in a book on Digital Trouble-
hardware house does not stock a Uniline, Inc. shooting.
desired tool and you want to write 200 East 4th Street
directly to the manufacturer to Newton, Kansas 67114
determine who handles the product
in your area. The tools are listed in Weller DS40-3 Desoldering Tool
the same order as in the pictures.
(Fig. 10) and Weller WRCP Solder-
8660A/B SYSTEM
Many of these tools are used within ing Station (Fig. 8) manufactured by MANUAL
the HPserviceorganization and thus Weller
HP part numbers have been as- A new system level manual has just
100 Wellco Road
signed to facilitate handling within Easton, Pennsylvania 18042 been added to the documentation
HP facilities. While purchasing tools set for the 8660 system. This new
locally is encouraged, some readers Synthesized Signal Generator
may find it convenient to orderfrom Wahl Cordless Solder iron (Fig. 11) System Service Manual, HP part
HP if other alternatives are not manuf actured by number 08660-90053, is designed to
available. Thus the HP part number be used with any 8660A or 8660B
is included if one exists. For prices Wahl Clipper Corp. system as an aid to effective
and delivery information in your Sterling, Illinois 61081 troubleshooting by a repair
area, please contact your local HP (No HP part number). Wahl eviden- technician. The troubleshooting
office. tly is also distributing these through procedure helps i s o l a t e a
several large retailers, such as malfunction quickly to a specific
Klein diagonal cutters D219-4C (HP Sears. section of the system. The
p / n 8710-0012) a n d K l e i n information in the Operating and
needlenose pliers D310-6C (HP p/n Desoldering braid (Fig. 12) many Service Manual for that section is
8710-0003) manufactured by brands and sizes from which to then used to further isolate the
Klein Mathias and Son choose. One manufacturer is malfunction to aspecific component
7200 McCormick Road or replaceable module.
Wik-It Electronics Corp.
Chicago, Illinois 60645 This manual is recommended f o r .
140 Commercial Avenue
Sunnyvale, California every technician repairing 8660
Ungar #775 solder body (HP p/n systems. It can be purchased by
8690-0009), #237 42 watt element (5 foot spool 0.025 inch wide HP p/n contacting your local HP office.
(HP p/n 8690-0044), #PL113 tip (HP 8690-0124); 5 foot spool 0.050 inch
p/n 8690-0007) manufactured by wide HP p/n 8690-0125)
Ungar
Division of Eldon Industries Freon TF Degreaser MS180 (Fig. 14)
Compton, California 90220 (HP p/n 8500-0232) manufactured
by
Soldapulldt (Fig. 3) (HP p/n 8690- MiIler-Stephenson Chemical
0060) and Soldavac (Fig. 4) (HP p/n Company
8690-0143) manufactured by 7614 N. Paulina Street
Edsyn, Inc. Chicago, Illinois
15954 Arminta Street Brush (Fig. 14) many manufacturers
Van Nuys, California 91406 from which to choose. One is Os-
Replacement tips are also available born #9501 (HP p/n 8520-0015)
for these vacuum devices (HP p/n manufactured by
WWW.HPARCHIVE.COM
I
0, 1
- ,
r
Y
=J .5 v o l t
pulses
figure 2
Due to very high impurity levels, the diodes
quiescent forward voltage drop is very low
and its reverseleakage current very high. This
Here's your chance to share your Ideas and views with other Bench Briefs recipients. in would lead your ohm meter to conclude that
Reader`s Corner, we will print letters to the Editor, troubleshooting tips, modification infor- the darn thing is dead shorted in both direc-
mation, and new tools and products that have made your job easier. In short, Reader's Corner tions. A first glance with your curvetracerwill
will feature anything from readers that is of general interest to electronic service personnel. give the same appearance, but alittleextra ef-
fort and a closer look may reveal that at or
near its rated current the thing does, in fact,
If there is something you have to share with other Bench Briefs readers, let us hear from you. switch states. If your curve tracer has a 100
ohm sampling resistor, then 1 volt vertical
deflection will correspond to 10 mA of
junction current. Any reasonable facsimile
Editor: will be exposed and may be a threat to an will work so long as you can display about 0 to
operator. 30 mA vertically. The curve on a good diode
We have been using 970A Probe Digital will be similar to Figure 3,and not likethe ren-
Multimeters both in the shop and in the field. An accessory probe is available that may
provide added flexibility in using the 970. This dition in the Nov./Dec. issue. You should be
They are very handy, and useful, especially able to discern the switch points and get afair
when checking floating circuits. Their one can also be used with other voltmeters; it has
HP pln 00970-69500. Contact your local HP idea of the current magnitude.
drawback is that the probes are too fat to use
on the component side of our high-density office to place an order.
P.C. boards. When they are used on the 7830s
or 78200 series analog boards, for example,
the prospect of shorting two adjacent points
is a real hazard.
I have devised a simple, but effective
modification for the 970% which reatly in-
creases its usefulness and reluces the
TESTING TUNNEL DIODES
Reference Bench Briefs of September / Oc-
Editor
I
/O m/Aiv .... , j!. ., . r
tober and November/December on the
hazard. Take the hollow tip probe, o r a n extra measurement of tunnel diodes.
one, and strip back the plastic around the tip.
Solder a common hat pin, or sewing pin onto The working bench tech is likelyto encounter
the metal tip. Cover all exposed metal with tunnel diodes in the trigger circuits of scopes Fr 3
p
le
shrink tubing (1/16 inch i.d. on pin, 3/16inch (HP Model 180 plug-ins), frequency counter
i.d. on probe), strip off 1/16inch off pin point. front ends (HP Models 5248 and 5360).and
This gives a fine point with at least 3/4 inch elsewhere. Since most curve tracers (home-made, and
reach. store bought) use a 60 Hz sweep voltage,
another neat trick is to switch your scope to
Isuspect that people using 970s all around the internal sweep and line sync, then look at the
world are having the same problem. This may voltage across the diode. The resulting semi-
be a solution. square wave might tell you more than the
rather screwy curve of Figure 3.
Dave Foss
HP Sales-Service Office The above comments are obviously not all in-
Skokie, Illinois clusiveand thetesttechniqueis notfoolproof,
but it may prevent unnecessary replacement
of a good part or detect a dud before it gets
installed.
Bill Hubbard
HP Sales-Service Office
Richmond, Virginia
In theory, these diodes have a negative resis-
tance slope in one portion of their
characteristic curve, making them capable of Author Stanley replies that the two figures will
amplification and oscillation. See Figure 1. In agree when the timebase and amplitude
actual practice, however, we have aproblem if scope settings are changed, although the
we try t o look at this slope. Any simple circuit drawing in the article is not the most accurate
that we can devise to gradually increase the representation.
current through the diode will have some
internal resistance, therefore, there "ain't no The main point is to get a diode curve with a
way" to arrive at point B, becauseit will abrup- -
break ini t then you know i t is not shorted.
a When constructing the tip, b e certain to in-
sulate it adequately. ALSO take care to store
the tip properly after each use to reduce the
chance of injury. Since this new tip will not
tly switch from A to C, and vice versa on the
decreasing swing. This switch action results
in about 0.5 volt change across the diode and
occurs at nominally 5 to 15 mA current. The
voltage change occurs very .rapidly. Circuits
like Figure 2 can produce discrete pulses at
Readers interested in viewing the tunnel
diode curve on an oscilloscope may be
interested in viewing the videotape
"Troubleshooting Transistorized Circuits
Faster", HP Videotape No. 90030-693.
collapse into the tip recess, the sharp point several hundreds of MHz. Editor
NEW SERVICE NOTES
II
13lW11/17BlA LARQE-SCREEN DISPLAYS
1310/11A-13, 1317/21A-1. All serials. Recommen-
o
,upplement t ded replacement and/or space printed circuit
board awmblles.
11
8- TOR SAMPLER
1815NB-18. Serial prefix 1241A and below. Re-
quired modification. Supersedes 1815A/&lA.
3350UB AUTOMATIC SYNTHESIZER
333OAIB-5. All serials. Replacement part numbers 8@WA 81QNAL QENERATOR
for LED displays. 8854A-4. Serial prefix 1 W A and below. Meter
333ON8-6. All serials. Posslble cause of frequen- support bracket.
cy onsets.
86SOAlB SYNTHESIZED
34OWC TRUE RMS VOLTMETER S I W L QENERATOR
3403C-3. HP part numbers 5060-9131/32/33. Re- 866OA-58. Serial number 1445AOO690 and below.
placement part numbers for LED displays. Reference level output levels Increased. Super-
34WA DlQffAL VOLTMETER sedes 8BBoA-5A.
343OA-7. Elimination of potential shock hazard. 86606-24. All serials. Summary of DCU assembly
chan
916pAIB MULTIMETER 6 B Serial prefix 1448A and below. Im-
80r6-
NEED ANY SERVICE 34698-3. HP part numbers 5060-9131/32/33. Re-
placement part numbers for LED displays.
proved accessability for AlA13 DCU annuncia-
tor board.
NOTES? 34696-4. Serial numbers 1233A03800 and below.
tmproved Input attenuator.
86808-28. Seriabnumber 1439AOlOOOand below.
Reference section output levels increased.
99(wA IWTRUMENTATION WSBB SOLI0 STATE RF UNIT
TAPE RECORDER FOR wsom
Here's the latest listing of Service 398OA-24. Serial prefix 1422A only. Option 050 868984. Serial number 1406AO2325 and below.
Notes available for Hewlett- (Remote Control) wiring error. Replacement for E4 Power Amplifier.
Packard products. To obtain infor- W A / B MULTI-FUNCTION DlQlTAL HP-IB CABLE
VOLTMETER 10831A/B/G1. HP-I8 Cable repdaceable parts.
mation for instruments you own, 3480NB-7A. All serials. Supersedes 348ONB-7.
remove the order form and mail it Bottom cover shorted'to guard. 11681B FREWENCY EXTeNaION
to the HP distribution center nearest 34OOC/D DIGITAL VOLTMETER MODULE
you. .
3480CID-1. AH serials. Replacement part num-
bers for LED display.
11661B-1. All serials. Installation checks and
adjustments.
94wA DC RANaE UNIT S 4 7 W DCV/DCNOHM MLTeR
3482A-4. Serial numbers before 1133A00751. 34703A-4. Serial numbers before 1251A01500.
Proper use of the print command (flag) signal. ement o reliability when measuring high
f
214A PULSE QENERATOR M A MULllFUNCTlON UNIT
$= inputs.
34703A-5. Serial numbers before 1251A01500.
214A-9. All serials. Improved 100 volt operation. 3484A-3. Serial numbers before 1124A01576. Elimination of potential intermittent logic
400E/EL AC VOLTMETER Proper use o the print command (flag) signal.
f problems.
400VEL-10. W E serial number 1208A18153 and 967SA QAIN PHASE-METER
below; W E L serial number 1208A18053 and 86200 SERIES
below. Improved input attenuator. 3575A-2. HP pari numbers 5Oeo-e131/32/33. Re- SWEEPER PLUG-INS FOR oo2oA
placement part numbers for LED displays. 86210120A-1. 88210A serial number 1215AOO210
4098 AC VOLTMETER 427lA 1 MHZ DIGITAL LCR METER and below; 8822OA serial number 142WOOS30
4038-8. Serial numbers below 0988A07651. Re- 4271A-2. Serial number 1412Joo3Jo and below. and below. Modificatlon required for 84108
sistor replacement. Improved Xtal OscillatorCircuit on A4 board. com tibility.
86230h/88241A-l. 86230A all serials; 862308
W A R DC MICROVOLT-AMMETER 534SA ELECTRONIC COUNTER serial number 1407A00320 and below; 86241A
425A-7. Elimination of potential shock hazard. 5345A-1. Serial prefix 1428- and below. Input am- serial number 1409Ao0305 end below. Modifica-
W@/F SIGNAL QENERATOR plifier failures. tion required for 84108 compatibility.
WVF-18. W E serial number 637-00321 thru 7 W X-Y RECORDERS 8824W50NB-2. 66242A serial number 1411AOO-
refix 1201A; 808F serial prefix 610- thru 122lA. 345 and below; 86250A all serials; 882506 serial
7WA-2. Serial prefix 1503 and below. Eliminat-
Eiiament rewiring to reduce excessive residual
AM and FM.
ing oscillatians in Model 7 W A Power Amplifier
number 1411A00480 and below. Modification
required for 84108 compatibili
stage. 8626OA-1. Serial number 1339Ab90 and below.
W A PROBE MULTIMETER
O 7123NB. OPTIONS 045 AND 048 ONLY Modificationrequiredfor 84108 compatibility.
97OA-2. All serials. Improved display. 7123A/&8. Serial prefixes before 1502. Stepper
drive incorrect chart speeds. 86300 SERIES
1000 SERIES TESTMOBILES
1000A-1. Modeis lOOOA thru 1004A. Improved SWEEPER MODULES FOR w20A
720Sr. 721OA, S8 PLOTTERS
8U 88330/31B-1. 863308 serial number 1430A00321
structural rigidity. 7203A-13/721OA-l3/9882A-15. All serial prefixes and below; 883318 serial number 1430AOO207
11O(LA/B-l108A TUNNEL DIODE MOUNTS before 1504A. Improved pen lift solenoid. Super- and below. Modiflcation required for 84108
1180NB-lA/1108A-l. All serials. Repair policy. sedes 7203A-3, 721OA-2, 7210A-5,9862A-8. corn tlbility.
Supersedes 1108A-1. 8634lEA-2. 88341A all serials: 86342A serial
8407A NETWORK ANALYZER MAINFRAME number 1411A00658 and below. Modification
1
- OPTION H l l PERSISTENCE W7A-7. Serial prefix 1144A and below. Power re ulred for 84108 corn atibili .
OSCILLOSCOPE suppl improvements. Supersedes W7A-5. 8834iA-3,W35OA-4, 8838/52A% 86342A serial
Hll-1208A-10. Serial prefix 1330A and below. W7A-8: All serials. Phase locked oscillator number 1410A00547 and below; 8835OA serial
Preferred replacement for A3CRl and A3CR2. repairs. number 1410A00570 and below; 86351A and
W 2 A all serials. Modification required for
1220N1221A OSCILLOSCOPES 6SSW SPECTRUM ANALYZER 84108 Compatibility.
1220A-19/1221A-8. All serials. Improved heat 85588-2A. All serials. Tune ootentiometer re-
sink insulation. placement/operationTEST. ' 86802A RF SECTION
1220A-20. Serial numbers below 1416A-03907. 85588-6. Serial prefix 1420A and below. Moditi-
Sweep problems. cation kit to install 7-segment LED digital Panel 866O2A-7. Serial number 1335Ao0990and below.
Meter. Improvedstability of A4 Detector-Amplifler.
1900A X-Y DISPLAY,
1908AH3OoA MONITOR 8820/21A SWEEP OSCILLATORS -A RF SECTION, OPT 009
1300A/1308N1309A-10. 1300A serial refix1350A 8620A-2C. Serial preflx 1218A and below. A9/AlO 8BBo3A-1. All serials. 88808 Mainframe serial pre-
and below; 1308A serial prefix 1444land below: switch/interconnect board assembly replace- fix 14MA and below; 866OA Mainframe serial
1309A serial prefix 1441A and below. Preferred ment. Su 862oA-2/2&28. prefix 1 T A and below. Mainframe compatlbflity
replacements for high voltage regulator assem- 8620A-7. g n a l number 1332A01875 and below. modifications with 88603A opt 003.
bly and high voltage oscillator transistor; and Modification required for 84108 compatibility.
required modification if high voltage oscillator 8621A/8-1. 8621A all serials; 88216 serial number w(wu MODULATION SECTION
transistor is replaced. Supersedes 1300A-9/ 1408A00840 and Flow. Modification required 66632A-5. Serial number 1343AMMOand below.
1308A-8/1309A-8. for 84108 compatibility. FM calibrationcycllng.
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Please check below the numbers of any desired service notes:
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Hewlett-Packard 0 122OA-20 0 862OA-2C
13 1300N1308Nl309A-10 0 862OA-7
195 Page Mill Road 0 1310/11A-13,1317/21A-1 0 8621NB-1
Palo Alto, California 94306 0 1815NB-18 0 864OA-25
0 333ONB-5 0 86408-25
For European customers (ONLY),
0 333ON8-6 0 8640A-26186408-27
please send it to: 0 3403C-3 0 86408-26
0 343OA-7 0 8654A-4
0 34698-3 0 0660A-58
Hewlett-Packard 0 34698-4 0 86608-24
Central Mailing Dept.
P.O. Box 7550
Freeport Building
SCHIPHOL Centrum- 0
0
396OA-24
3480A'B-7A
0
0
86608-27
86608-28
The Netherlands 0 3480ClD-1 0 86998-4
0 3482A-4 0 10631NBfC-1
0 3484A-3 0 116618-1
0 214A-9
0 400EfEL-10
0 4038-8 0 3575A-2 0 34703A-4
0 425A-7 0 4271A-2 0 34703A-5
0 608ElF-18 0 5345A-1 0 8621Of2OA-1
0 7046A-2 0 86230NBl86241A-1
0 7123N8-8 0 86242N5ONB-2
0 8828oA-1
0 97OA-2
0 1OOOA-1
0 1160NB-1N1108A-1 0 7203A-13/721OA-l3/9862A-15
0 Hll-1208A-10 0 8407A-7 0 86330/318-1
0 1220A-1911221A-8 0 86341142A-2
0 8407A-8
0 85588-2A 0 86342A-3,86350A-4,
86351152A-2
0 855886
0 86602A-7
0 86603A-1
0 86632A-5
Please photocopy this order lorn if
you do not want to cut the page
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*'
*I
:I QUIZ
TEST YOUR LOGIC
Here's another challenging quiz to
test your logic. Since service work
requires a very logical procedure,
here's another exercise to test
your ability to bring order and
logic to a confusing situation.
This quiz is reprinted with permis-
sion from "Games for the Super-
intelligent" by James Fixx
(Doubleday, Popular Library).
Batter Up! infielders except Allen, Harry, fielder are bachelors. The
and Andy, are shorter than others are married.
Andy dislikes the catcher.
Ed's sister is engaged to the
second baseman.
Sam. .`
Paul, Andy and the shortstop
lost $50 each at the race-
CiP he shortstop, the third base-
man, and Bill each cleaned
up $100 betting on the fight.
I
I
GP he center fielder is taller
than the right fielder.
Harry and the third baseman
track.
Paul, Marry, Bill, and the
- catcher took a trouncing
from the second baseman at
One of the outfielders is
either Mike or Andy.
16) Jerry is taller than Bill. Mike
live in the same building. is shorter than Bill. Each of
pool. them is heavier than the
Paul and Allen each won $20 )Sam is involved in a divorce third basern?. .
from the pitcher at pinochle. Suit. Using these fac s, determine t)l
Ed and the outfielders play The catcher and the third names of the men playing the
poker du'ting their free time. baseman each have two various positions on the baseball
The pitcher's wife is the third children. team.
baseman's sister. 13) Ed, Paul, Jerry, the right Answer will appear in upcoming
8) The pitcher, catcher, and fielder, and the center BENCH BRIEFS.
t '
...
. HEWLETT-PACKARD COMPANY
.ne I, O^^*
Bulk Rate
U.S. Postage
PAID
Menlo Park, CA. *
Permit No. I
317
I Qr
"ti 4
Address Correction Requested Printed in U.S.A.
Allrightsan,~ed.NopartofBenchBrie~mayben,producedwittlouttheexpre~conaentoftheEditor.~heEditormaybetelephonedat
(415)483-3301. Extension 314.
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