Service Manuals, User Guides, Schematic Diagrams or docs for : HP Publikacje HP-Bench-Briefs-1995-01-03
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HEWLETT
PACKARD
SERVICE INFORMATION FROM HEWLETT-PACKARD
1st Quarter 1995
I
t
t
I
he Metrological and Financial
Implications of a Clogge Fan-Filter!
Martin Aust / Hewlett-Packard
Greg Burnett / Hewlett-Packard
Mike Hutchins / Hewlett-Packard
When you've peeked around the back
of an ATE system, have you ever dis-
covered one or more dirty or clogged
fan filters?
If not, then congratulations!
Maybe your work environment ap-
r proaches `clean room' quality - or
maybe your preventive maintenance
program is effective enough to keep the
filters clean.
However, it's reasonable to consider
that the majority of systems are oper-
ating in environments and processes
that:
= Degrade metrological integrity; and,
rn Increase equipment maintenance
cost and downtime.
How serious are these effects? It may
help to consider the following scenario,
drawn from anumber of real situations.
burning. Almost simultaneously, the Furthermore, your system is now in-
The Scenario instrument goes into hard failure. Now operative due to the failure. This down-
f Over a period of months, the air filter for the first time, you become suspi- time translates to lost income, and al-
for an instrument in your ATE system cious, to say the least. You search, in- most certainly, to customer dissatisfac-
i gradually becomes clogged. The inter- spect and ponder. . . . . tion. And, due to the nature of heat
t nal operating temperature gradually . . . . . and it doesn't take long for you to damage and the associated repair pro-
rises and some metrological param- spot the clogged air filter. cess, the instrument is likely to be out
eters gradually drift. At some point, of service for weeks. When you have
due to circuit temperature coefficients, Although the cause of this dilemma is the instrument repaired and recalibrated,
the instrument goes out of specifica- now obvious, perhaps you don't even it will more than likely be at great ex-
tion. Unaware of ti problem, you con-
hs want to think about the metrological pense because there are multiple failures.
f tinue to use the instrument! and financial effects. The truth is that,
for some unknown period of time, you Eventually, you get the instrument back
Of course, the air filter continues to have been using an out-of-tolerance and begin using it again. Unfortunately,
collect debris. Eventually - maybe instrument in your production process. due to the original heat-damage inci-
weeks later - you smell something This is the metrological impact! (See "Fan Filter,"page 4)
Pub. NO.5952-3467 0 Hewlett-Packard1995
WWW.HPARCHIVE.COM
Table 1. HP 8711A Test Equipment
HP 8711A Network
Analyzer Spare
436A will not work
Parts Kit Is Mow 438A or 4378 Power Meter
8482A Sensor Required for both 50 and 75 ohm units
84815 Sensor Required for all attenuator units (Opt !El)
Avai Iable 08711-60017 Service Cable Part of 08711-60010 service kit
118528 Minimum Loss Pad Required only for 75 ohm units (Opt 1EC)
John Vallelunga / Hewlett-Packard Cal Kit (85032B/E 50 ohm) ~ ~ 5 ~ 3 6for/ 75 ohm units)
5 E
8116A Function Generator
8496NG lOdB Step Atten With Cal data
Computer: HP Series 200/300
vidual assembly prices. Each kit con- front panel, the A7 CRT, or the A8 At-
tains the following assemblies: tenuator. These all have very low fail
rates and are available separately.
Hewlett-Packard has just introduced A2CPU
two new spare parts kits for the 8711A rn A3Frac-N In order to make the required adjust-
RF Network Analyzer. These kits will ments once an assembly has been re-
w A4Source
allow any user to quickly repair more placed, some or a l of the test equipment
l
w A5Receiver shown in Table 1may be required de-
than 80 percent of any failures. The in-
tended customers are those users who rn A6 Power Supply pending upon which assembly failed.
have a medium-to-large installed base w A8 Disk Drive This list assumes the latest 8711A firm-
and require a minimal downtime. ware is used (A.02.10)as well as the lat-
These assemblies will allow most all est performance test software (P/N
The standard kit is HP P / N 08711- failures to be quickly repaired. Once 08711-10011). This list does not include
60133 for the 50 ohm 8711A. HP P/N repaired, the defective unit can be re- common equipment such as cables,
08711-60134 is available for 75 ohm turned and a restored exchange assem- adapters, voltmeters, and power sup-
units (Option 1EC).Both are provided bly can then be purchased to restock plies. For complete instructions, refer to
at a substantial discount over the indi- the kit. This kit does not contain the A1 the HP 8711A Service Manual. 0
Timebase Ground-Loops
Greg Burnett /Hewlett-Packard dio gain of a device-under-test (DUT). isolate most (or all) of your external
I locked the 3325B and 3585B timebase connections. (The problem
Break the ground loop with a timebase timebases to the "house frequency tends to be worse when an instrument's
isolation transformer! standard" via a distribution amplifier. external timebase input and main sig-
I then connected a very low-level au- nal output are both "floating" relative
The practice of locking the timebase of dio signal from the 3325B to the DUT's to the chassis, but not relative to each
an instrument to a "house frequency input port. The DUT amplifies the other; however, many ground-loop sce-
standard" is a good way to improve the small signal (80 dB gain), which I at- narios are possible.)
frequency accuracy and traceability of tempted to measure by connecting the
your measurements. However, an un- DUT's output port to the 35858 1M
ohm input port. However, I discov-
The Solution
desired side-effect may be a ground-
loop induced measurement error for ered the DUT was self-oscillating Break the timebase ground-loop by in-
certain measurands - especially for (which it isn't supposed to do). When serting isolation transformers between
low-level audio measurements. (In I disconnected the 3325B external the frequency distribution amplifier
such instances, the external timebase timebase connection, I broke the and the external timebase input of each
connection may complete i i unwanted gound-loop and the problem "went instrument. (Placeeach isolation trans-
ground-loop path.) away." former as near the external timebase
input as possible.)
The Problem Many times external timebase ground-
loop effects are more subtle than the The isolation transformer should pref-
For example, consider the following above scenario.This can be even worse erably:
scenario: I was using an HP 3325B Syn- because moderate measurement errors
thesized Generator and an HP 3585B may go undetected for some time. 1.Have 1:l ohms ratio, with bandwidth
Spectrum Analyzer to measure the au- Therefore, to be safe, you may wish to to at least 20 MHz.
2 BENCH BRIEFS 1ST QUARTER 1995
2. Be mounted in a small, shielded case
with BNC connectors.
3. Break the ground-loop, but not alter
the timebase signal.
The transformer may be "home-built"
from suitable parts. However, as of this
writing, I have used a low-cost, com-
mercially available isolation trans-
* former to successfully break timebase
ground-loops. It is:
r Mini-Circuits, P/N FTB-1-1-75 '(215
$36.95 (US.Dollars)
I
I
Contact:
Mini-Circuits
P.O. Box 350166
Brooklyn, NY 11235-0003
Phone: 718-934-4500
Figure 1. Block diagram showing simplified ground-loop problem FAX 718-332-4661
pendix C that has been there unknownfor
at least 20 years. Starting on page 2-4, a
sample problem is worked out that hap-
pens to be the same example used in the
r appendix. A t the end of the formulae on
page 2-6 the correct answer of 75 days is
given. However, somehow this was trans-
posed to 101 days in the example in Ap-
pendix C, which was passed on in the
Bench Briefs article.
A s for a nmpequency standard, John, look
at Hewlett-PackardS new HP 58503 GPS
Receiver, which will be describe in a later
Dear Editor A follow-up article on calibration
issue of Bench Briefs. For more informa-
sources for high-end frequency stan-
dards would be nice to see in the next tion contact your local HP sales ofice.
Nice article on "Calibration of Time Bench Briefs. Another reader wrote in that he preferred
Base Oscillators," however, I believe to see the Allowable Offset column in
there is a mistake in the Example 2 John Chapman/Measurement Table 1 to be shown in unitlessfractional
paragraph where it references Figure Standards & Services form to avoid confusion. Therefore, Table 1
3b, the Recalibration Chart for Ru- Hewlett-Packard Colorado Springs would read as follows:
bidium Standards. If the chart is cor-
John - Thanksfor catching a typographi-
rect, then the recalibration time should
cal error in our Application Note 52-2 Ap- Editor
be approximately 80 days and not 101
t as the text states. Table 1. Typical specifications of the five types of oscillators.
iypicai snin aiiowaw
Also a note on frequency standards.The
for 5 C" Offset Q (T=l sec.)
: HI' 5065A Rubidium Frequency Stan-
dard has been our "house frequency 3x107 5x1OS 30 minutes 1 x lo9
standard" at our manufacturing divi- per month
sion for the last 20 years. A three month 1x10-7 ix i 0 4 3 hours 1x
calibration cycle was established many per month
years ago and I only have to "steer" it mHr (1.5 x 3 days 5 x 10-'2
back to nominal approximately once a
year. We still use WWVB as a calibra- 400 FHZ (4 x lo-") 4 hour
tion source due to its geographicalclose- per month
ness to our site. I do a 48 hour drift test Cesium None 3x lot2 50 pHr (5 x 10l2) 45 minutes 1 x 10"
(Primary Std.) (21.5 nseclhourl
for maximum accuracy.
1ST QUARTER 1995 BENCH BRIEFS 3
WWW.HPARCHIVE.COM
("Fan Filter," continued from page 1 )
calibrated more often. To help preserve metrological trace-
dent, many parts (that were not re-
ability of your processes,
placed) are functional - but wounded.
During the following months and The cost of ownership - and the incon- rn TO improve your customer's satisfac-
years, you notice the instrument has venience of downtime - are disappoint- tion, and
poorer reliability than before and it is ing, compared to what could have rn To reduce operating costs,
not as stable between calibrations. been.
all you need to do is follow a simple
You might need to reduce the It is without doubt that variations of preventive maintenance program to
instrument's calibration interval ac- this scenario do occur in normal work- inspect and clean the air filters at regu-
cording to your company's periodicity ing environments. lar intervals.
management process - a pity since the
instrument previously had an extended The Solution For further information on this or ad-
interval based on its excellent histori- vice on any other Test & Measurement I
cal performance. So, to meet metrologi- The solution to this problem is very Support matter, call your local Hewlett-
cal reliability targets, the instrument is simple. . . . Packard Customer Support Center. 0
Order Safety Service Note E1550A-01-S Note: This wiring error only creates a
Safety-Related (document ID number 5758 on the HP problem in North America (US and
Service Notes FIRST system) for more information. Canada) and other countries that use
polarized mains. For countries that do
not have polarized mains and that rely
Service Notes from Hewlett-Packard
E3951A IPATS Primary Access on the branch circuit over-current de-
relating to personal safety and possible
equipment damage are of vital impor- Test System; Front end vices for protection, the reverse wiring 9
is not a particular issue.
tance to our customers. To make you adapter
more aware of these important notes,
they are printed on paper with a red Serial Numbers Affected For more information, order Safety Ser-
border, and the service note number 0000U00000/9999U99999 vice Note E1421A-01-S (document ID
has a n "-S"suffix. In order to make you number 6251 on the HP FIRST system).
immediately aware of any potential Note: This Safety Service Note is for
safety problems, we are highlighting informationonly. All systems have been
safety-related service notes here with repaired and no further action is nec-
a brief description of each problem. essary. J2522A & J2523A Internet
Also, in order to draw your attention LAN Advisor
to safety-related service notes in the For more information, order Priority
service note index, each safety-related Safety Service Note E3951A-01-S Serial Numbers Affected
service note is highlighted with a con- (document ID number 6166 on the HP J2522A - 3440A00116/3440A00158
trasting color. FIRST system). J2523A - 3439A00165/3440A00238
HP E1550A C-Size DS1
32-Channel Daisy E1421A C-Size Due to a redesign of the chassis to meet
ChaidMultiplexer Switch Portable Mainframe RFI standards, there exist components
Serial Numbers Affected Serial Numbers Affected
that do not have the appropriate clear-
ance to a ground point. If the power
i
3315A00100/3315A00141 US34000101/US34000216 cord ground is defeated and the com- 4
ponent arcs to ground, a shock hazard
The maximum input voltage for the A potential electrical shock hazard may occur.
E1550A is 42 Vpk. Some units were and/or fire hazard could result if cer-
shipped with sheet metal (top covers) tain fault conditions were to occur in Return your instrument to the nearest
marked with an input voltage of 200 the instrument. HP Service Center and it will be re-
Vdc/170 Vrms. The manual does indi- paired at no charge. For more informa- -3
cate the correct specification. Electric A possible assembly error connects the tion, order Priority Safety Service Notes
shock and/or equipment damage is AC neutral wire in series with the fuse J2522A-01-S or J2523A-01-S as docu-
possible if input voltage greater than instead of the line wire. This error oc- ment ID numbers 6262 or 6264 from the
42 Vpk is applied. curs on the power entry module. HP FIRST system. 0
4 BENCH BRIEFS 1ST QUARTER 1995
WWW.HPARCHIVE.COM
1995 Bench Briefs' Instrument Service Note Index
HP FIRST (208)344-4809
T & M Instrument Section - Press 4
T & M Selvice Notes - Press 2
Enter the Password - 76683
SN SN Abstract HP FIRST
Type No. Document ID No.
MR 10887B-01 New IC sockets prevent FPGAs from falling out 6125
MR 10887P-01 New IC sockets prevent FPGAs from falling out 6126
IO 11848A-03 Clarification of test failures due to PC board modification 6129
10 160088-01A New thread sealant for top cover micro-switch so that adjustment is maintained 6096
MR 16008B-02 Recommended replacement of main electrode if conductive elastomer sheet is loose 6060
IO 16047C-01 Instructions on replacing the BNC connector and electrode 6061
IO 16117B-01 Rec replacement parts for black cover/gold contact plug 6148
IO 16117B-02 Design of interlock cable has been changed 6168
MR 16441A-01 Mod corrects abnormal measurement results using R-Box & Kelvin-Triaxial cables 6095
10 16555A-01 Change in calibration procedures for multicard modules 6059
MR 1660A-01 Instructions on reloading S/W to correct Flash ROM failure 6131
MR 1660AS-01 Instructions on reloading S M r to correct Flash ROM failure 6132
MR 1661A-01 Instructions on reloading SiW to correct Flash ROM failure 6133
MR 1661AS-01 Instructions on reloading S i W to correct Flash ROM failure 6134
MR 1662A-01 Instructions on reloading S i W to correct Flash ROM failure 6135
MR 1662AS-01 Instructions on reloading S/W to correct Flash ROM failure 6136
MR 1663A-01 Instructions on reloading S/W to correct Flash ROM failure 6137
MR 1663AS-01 Instructions on reloading SiW to correct Flash ROM failure 6138
IO 3048A-02 Clarification of test failures due to PC board modification 6127
IO 3048MS-02 Clarification of test failures due to PC board modification 6128
MR 33120A-01 Higher value of output fuse makes it less likely to open 6169
MR 34401A-05A Excessive time drift of ohms function calibration 6163
MR 3560A-02 Power off failure discharges battery 6170
MA 3562A-05C New firmware improves performance 5273
MR 35660A-05A New power switch improves reliability 5882
MR 35665A-01A New power switch improves reliability 5883
MA 35670A-03 Firmware upgrade provides new features and fixes defects 6150
MR 3569A-01A HP 3569A firmware revision history 5878
MR 3569A-03 Power off failure discharges battery 6171
IO 3577A-18 Magnitude dynamic accuracy spec changed at frequencies below 100 kHz 6065
MR 3577B-08 Modification to AI 8 improves source distortion at 1.O kHz 6066
10 3577B-09 Magnitude dynamic accuracy spec changed at frequencies below 100 kHz 6067
MR 3588A-06A New power switch improves reliability 5880
MR 3589A-02A New power switch improves reliability 5881
IO 37161A-01 Recommended IC replacement 6100
IO 37161C-01 Recommended IC replacement 6101
IO 37161D-01 Recommended IC replacement 6102
MR 37701A-07 Incorrect TERM level measurement on AI Measurement Assembly 6103
MR 377018-01 Required FiW upgrade corrects error in FULL-TI mode and Fractional-TI mode 6104
MR 37702A-01 Incorrect TERM level measurement on A1 Measurement Assembly 6105
MR 37702A-02 Required FiW upgrade corrects error in FULL-T1 mode and Fractional-T1 mode 6106
MR 37711A-07 Incorrect TERM level measurement on A1 Measurement Assembly 6107
MR 37724A-02 Path overhead byte programming problem fix 6108
MR 37724A-03 Modification corrects 155 Mb/x clock wander 6109
IO 3779C46 Front panel connector panel replacement 6097
IO 3779D-50 Front panel connector panel replacement 6098
IO 3787B-13 Preferred replacement for A5 Motherboard assembly 6165
MA 3789B-04B Modification eliminates noise from HP 37898 input port 6099
MR 4142B-12 HCU's current compliance may occur unexpectedly 6172
MR 41501A-01 New power supply prevents shut-down failures 61 15
MR 4155A-02 New power supply prevents shut-down failures 61 I3
MR 4155A-03 Motherboard replment for SMU selftest/selfcalib error 10x24 6139
MR 4155A-04 New front panel prevents rotary knob from rubbing front panel 6140
MR 4155A-05 New front panel prevents push button keys from sticking 6141
MR 4155A-06 Replacing CPU board ROMs fixes firmware defects 6173
MR 4156A-02 New power supply prevents shut-down failures 6114
MR 4156A-03 Repair for SMU selftest/selfcalibration error 10x24 6142
MR 4156A-04 New front panel prevents rotary knob from rubbing front panel 6143
MR 4156A-05 New front panel prevents push button keys from sticking 6144
MR 4156A-06 Incorrect power-on test error codes 6174
MR 4156A-07 Replacing CPU board ROMs fixes firmware defects 6175
MR 41800A-03 Recommended replacement nose assembly for probe pin 6149
1ST QUARTER 1995 BENCH BRIEFS 5
WWW.HPARCHIVE.COM
~~ ~ ~
SN SN Abstract HP FIRST
Type No. Document ID No.
MR
MR
10
4194A-14
4195A-18
4276A-06A
Hang-up at power-on in the low temperature
Hang-up at power-on in the low temperature
Repair method for the A I logic board
6176
6177
6178
r
MR 4276A-08 Repair information for resistance accuracy test failures 6179
MR 42841A-04B Mod prevents bias current source fuses from blowing 5405
MR 4284A-llA Modification prevents bias current source fuse from blowing 5402
MR 4285A-09A Mod prevents bias current source fuse from blowing 5403
MR 4291A-02 New firmware corrects some bugs in F/W revision 3.00 and 3.01 6145
MR 4291A-03 New firmware corrects some bugs on firmware revision 3.00 through 3.02 6180
IO 4396A-01C Firmware Update and A I CPU repair information 5642
MR 4396A-13 New firmware corrects some bugs in firmware revision 3.00 6146
MR 4396A-14A New firmware corrects incorrect HP-IB return value of "*TST?" query 6147
10 4985A-01 Procedure to dnload main sys brd MAC addr when replacing board 6158
MR 4995A-02 Jumper wires in serial controller chip improve performance 6122
IO 4995A-03 Procedure to dnload main sys brd M A C addr when replacing board 6159
MR 4996A-02 Jumper wires in serial controller chip improve performance 6123
IO 4996A-03 Procedure to dnload main sys brd MAC addr when replacing board 6160
IO 5334A-07 AlU22 input Schmitt amplifier part change 6181
10 5334B-08 AlU22 input Schmitt amplifier part change 6182
MA 5335A-17C Replacement of the 5335A Front End Schmitt Amplifers 5597
IO 5372A-07 Performance test procedure for using 1 meg pods 6164
MR 66000A-03 A I - U I may short due to overshoots in the bias supply 6183
MR 66000A-04 New FMr prevents unit from briefly reasserting SRQ after a serial poll 6184
MR 66101A-02 Power supply may OV when load is removed at high output voltages 6185
MR 66105A-02 Supply may oscillate below .l5 volts 6186
10 6621A-07 If newly designed ac input module is replaced, associated cables need replacing 6072
IO 6621A-08 If newly designed pwr modules U338/339 are replaced, heatsink must be isolated 6073
IO 6622A-05 If newly designed ac input module is replaced, associated cables need replacing 6074
IO 6622A-06 If newly designed pwr modules U338/339 are replaced, heatsink must be isolated 6075
IO 6623A-09 If newly designed ac input module is replaced, associated cables need replacing 6076
10 6623A-10 If newly designed pwr modules U338/339 are replaced, heatsink must be isolated 6077
r
IO 6624A-07 If newly designed ac input module is replaced, associated cables need replacing 6078
IO 6624A-08 If newly designed pwr modules U338/339 are replaced, heatsink must be isolated 6079
IO 6625A-03 If newly designed ac input module is replaced, associated cables need replacing 6080
IO 6625A-04 Replacement power module must be isolated from ground 6187
MR 6625A-05 Replacement of failed diode corrects out of spec programming accuracy 6188
IO 6626A-03 If newly designed ac input module is replaced, associated cables need replacing 608 1
IO 6626A-04 Replacement power module must be isolated from ground 6189
MR 6626A-05 Replacement of failed diode corrects out of spec programming accuracy 6190
IO 6627A-01 If newly designed ac input module is replaced, associated cables need replacing 6082
10 6627A-02 If newly designed pwr modules U338B39 are replaced, heatsink must be isolated 6083
IO 6628A-03 If newly designed ac input module is replaced, associated cables need replacing 6084
IO 6628A-04 Replacement power module must be isolated from ground 6191
MR 6628A-05 Replacement of failed diode corrects out of spec programming accuracy 6192
IO 6629A-03 If newly designed ac input module is replaced, associated cables need replacing 6085
IO 6629A-04 Replacement power module must be isolated from ground 6193
MR 6629A-05 Replacement of failed diode corrects out of spec programming accuracy 6194
MR 6671A-02 Mod prevents Error -240 from occur when cond to HP 59510All I A Relay Box 6086
MR 6672A-02 Mod prevents Error -240 from occur when conn to HP 59510A/I 1A Relay Box 6087
MR 6673A-02 Mod prevents Error -240 from occur when conn to HP 5951OA/l I A Relay Box 6088
MR 6674A-02 Mod prevents Error -240 from occur when conn to HP 59510A/I I A Relay Box 6089
MR 6675A-03 Mod prevents Error -240 from occur when conn to HP 59510A/1 I A Relay Box 6090
MR 6812A-01 Mod prevents intermittent voltage or current readback e m r 6195
MR 6812A-02 Mod corrects unbalanced voltage distribution in 15V bias circuits 6196
MR 6812A-03 Mod corrects unequal voltage distribution on output board 6197
MR 6812A-04 Mod prevents excess ripple current in output capacitors 6198
MR 6813A-01 Mod prevents intermittent voltage or current readback error 6199
MR 6813A-02 Mod corrects unbalanced voltage distribution in 15V bias circuits 6200
MR 6813A-03 Mod corrects unequal voltage distribution on output board 6201
MR 6813A-04 Mod prevents excess ripple current in output capacitors 6202
MR 6814A-01 Mod corrects intermittent voltage or current readback error 6203
MR 6834A-01 New ROMs prevent power-on failure when in RS-232 interface mode 6121
MR 6834A-02 Mod corrects intermittent voltage or current readback e m r 6204
IO 70820A-03 Fractional N and local oscillator board repair strategy 6205
10
IO
70900A-14L
70900B-01G
List of firmware compatibility and history
List of firmware compatibility and history
5618
5619 f-
MR 81000FI-01 Loose retaining ring may cause higher insertion loss 6206
MR 81000N-02 Cracked ceramic bushing may result in high insertion loss 6207
IO 81533A/B-01 New power sensor module extends power range to +30 dBm 6058
IO 83630A-01 Recalibration of service software improves calibration 6208
6 BENCH BRIEFS 1ST QUARTER 1995
WWW.HPARCHIVE.COM
SN SN Abstract HP FIRST
Type No. Document ID No.
rl IO
IO
83650A-01
8483A-04
Recalibration of service software improves calibration
Shims may be needed to stabilize the RF center conductor
6209
6210
MR 85420E-01 EEROM Firmware Upgrade 621 1
MR 85422E-01 EEROM Firmware Upgrade 6212
MR 85460A-01 EEROM Firmware Upgrade 6213
MR 85462A-01 EEROM Firmware UpgradE 6214
MA 8560E-04D Firmware upgrade kit improves performance 5797
MA 8561E-03D Firmware upgrade kit improves performance 5798
MA 85620A-02A Firmware upgrade kit improves performance 6120
MA 8563E-04D Firmware upgrade kit improves performance 5799
MR 85638.30 Replacement A IO corrects frequency response 6215
MA 8564E-01C Firmware upgrade kit improves performance 6004
MR 85648.03 Modification prevents 5v power supply from limiting at turn-on 6152
MR 8564E-04 Replacement A IO corrects frequency response 6216
MA 8565E-01C Firmware upgrade kit improves performance 6005
MR 8565E-03 Modification prevents 5v power supply from limiting at turn-on 6153
MR 8565E-04 Replacement A10 corrects frequency response 6217
IO 8566A-43 Recommended replacement for AlOA6U2 OP AMP 6154
IO 8566B-41 Recommended replacement for AlOA6U2 OP AMP 6155
IO 8590D-01 Increasing flatness data values improves performance 6218
10 8590D-05 Defective EEPROM's can cause blank or partially blank display 6219
10 8590D-06 How to input ID codes to identify proper analyzer 6220
10 8590L-01 Defective EEPROM's can cause blank or partially blank display 622 1
IO 859OL-02 How to input ID codes to identify proper analyzer 6222
IO 8591C-02 Defective EEPROM's can cause blank or partially blank display 6223
10 8591C-03 How to input ID codes to identify proper analyzer 6224
10 8591E-01 Increasing flatness data values improves performance 6225
10 8591E-05 Defective EEPROM's can cause blank or partially blank display 6226
IO 8591E-06 How to input ID codes to identify proper analyzer 6227
IO 8592D-03 Defective EEPROM's can cause blank or partially blank display 6228
IO 8592D-04 How to input ID codes to identify proper analyzer 6229
IO 8592L-01 Defective EEPROM's can cause blank or partially blank display 6230
IO 8592L-02 How to input ID codes to identify proper analyzer 623 1
IO 8593E-06 Defective EEPROM's can cause blank or partially blank display 6232
IO 85938-07 How to input ID codes to identify proper analyzer 6233
MR 8593E-08 Mod prevents link analyzer self verification test failure 6234
IO 8594E-06 Defective EEPROM's can cause blank or partially blank display 6235
IO 85948-07 How to input ID codes to identify proper analyzer 6236
MR 85948.08 Mod prevents link analyzer self verification test failure 6237
IO 85958-06 Defective EEPROM's can cause blank or partially blank display 6238
IO 8595E-07 How to input ID codes to identify proper analyzer 6239
MR 8595E-08 Mod prevents link analyzer self verification test failure 6240
IO 8596E-06 Defective EEPROM's can cause blank or partially blank display 6241
10 85968.07 How to input ID codes to identify proper analyzer 6242
MR 8596E-08 Mod prevents link analyzer self verification test failure 6243
IO 8711A-05 Change in adjustment procedure forunits with firmware Rev A.02.10 61 19
MR 87510A-09 Mod to increase moisture and dust resistance of power supply circuit 6062
MR 87510A-10 Mod prevents unit from hanging up or generating an unexpected reset 6063
MR 87510A-11 Mod prevents CRT failure that causes loss of picture on the display 6064
MR 87510A-12 Modification to fix the power-on test failure in internal test No.18 6244
MR 8751A-22A Mod prevents unit from hanging up or generating an unexpected reset 5737
MR 8752A-02 Replacing capacitor eliminates blowing of fuse A8F10 6156
MR 8753C-04 Replacing capacitor eliminates blowing of fuse A8F10 6157
MR 89OOC-IO New PC board in 08900-60218 assembly improves reliability 6124
MR 892OA-11 Firmware replacement corrects various defects 6245
MR 8920B-01 Firmware replacement corrects various defects 6246
MR 8921A-04 Firmware replacement corrects various defects 6247
MR 8922A-01 Removal of unneeded hardware prevents internal shorts 609 1
MR 8922B-01 Removal of unneeded hardware prevents internal shorts 6092
MR 8922E-01 Removal of unneeded hardware prevents internal shorts 6093
MR 8922G-01 Removal of unneeded hardware prevents internal shorts 6094
MR 89410A-01E New FW fixes problems and improves performance (includes history 5710
MR 89410A-06 Installation of missing rope gaskets reduces radiated RF emissions 6068
IO 89410A-07 Source harmonic and other spurious products specification change 6069
1 MA
MA
89430A-03
89431A-01A
Incorrect SMA cable wrench may damage source modules
Firmware revision history
6248
6151
IO 89440A-06A 894 10A/89430A repair strategy 6049
IO 89440A-07 Source harmonic and other spurious products specification change 6070
IO 8944 1A-0 1A 894 10AB9431A repair strategy 6050
MR E1401A-05 Pwr supply reliability improvement when operated from 230VAC 6249
1ST QUARTER 1995 BENCH BRIEFS 7
WWW.HPARCHIVE.COM
SN SN Abstract HP FIRST
Type No. Document ID No.
MR
SA
IO
E1401T-01
E1421A-01-S
E1431A-01
Pwr supply reliability improvement when operated from 230VAC
Miswired AC line/fuse may cause shock hazard
High temperature failure may not be reported by diagnostics
6250
625 1
6118
c
MR E1472A-01 Mod prevents erratic operation at elevated temperatures 61 10
MR E1474A-01 Mod prevents erratic operation at elevated temperatures 6111
SA E1550A-01-S Possible shock hazard due to mismarked input voltage rating 6130
MR E1662A-01 Mod prevents breakage of 81000FI Optical Connector on front panel 6252
MR E1674A-01 New resistor improves TTL specs of trigger output when loaded at 50I ohms 61 12
MR E1696A-01 Mod prevents breakage of 81000FI Optical Connector on front panel 6253
MR E1697A-01 Mod prevents breakage of 81000FI Optical Connector on front panel 6254
MA E2550A-02A New firmware improves performance 5984
MA E2555A-01 Potential problems with record or errors on power-up 6167
MR E3610A-03 New voltage control eliminates sporadic output voltage overshoot 6116
MR E3611A-04 New voltage control eliminates sporadic output voltage overshoot 6117
MR E3630A-01 Reliability improvement for supplies that fail in the field 6255
PS E3951A-01-S For Info Only. Repair pmcedure/policy dims shock hazard 6166
MR J2301A-01 New assy allows full speed oper when used whigh spd adapters 6161
MR J2301A-02 Modification prevents Trap Machine failures 6256
MR J2301A-03 Modification prevents damage to power supply during power on 6257
MR J2302A-01 New assy allows full speed oper when used whigh spd adapters 6162
MR J2302A-02 Modification prevents Trap Machine failures 6258
MR J2302A-03 Modification prevents damage to power supply during power on 6259
MA J2306A-01 Optional modification upgrades the capture buffer to 16 MB 6260
MA J2309A-01 Optional modification upgrades the capture buffer to 16 MB 626 1
PS J2522A-01-S Possible shock hazard if earth ground of the power cord is defeated 6262
MR J2522A-02 Modification prevents damage to power supply during power on 6263
PS J2523A-01-S Possible shock hazard if earth ground of the power cord is defeated 6264
MR J2523A-02 Modification prevents damage to power supply during power on 6265
r
Service Note Types
IO Information Only SA Safety
MA Modification Available PS priority Safety
MR Modification Recommended
HEWLETT-PACKARD COMPANY
100 Mayfield Avenue Bulk Rate
Mountain View, California 94043 US. Postage
PAID
Santa Clara, CA
BENCH BRIEFS
Permit No.
1st Quarter 1995
90
Volume 35 No. 1
Service information from
Hewlett-Packard Company
To obtain a qualification form for a free
subscription, send your request to the
above address.
Reader comments or technical article
contributions are welcomed.
Please send them to the
Bench Briefs Editor at the above address. f
Editor: Jim Bechtold
Hewlett-Packard
All righls reserved Permission lo reprinl Bench Briefs granted upon written requesl to the Editor Printed in U.S A
I BENCH BRIEFS 1ST QUARTER 1995
WWW.HPARCHIVE.COM
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