Baker AWA Series User manual

AWA Troubleshooting
Troubleshooting
Please review this section before you call Baker Instrument Company or
return the unit.
Self Help and Diagnostics
Problems in testing often crop up. If you are experiencing a problem and believe the
problem might be with the Baker Instrument Company Advanced Winding Analyzer,
please take the following steps before calling or returning the unit.
By performing these procedures and having the requested information available, Baker
Instrument Company’s Service or Applications Departments will be able to better
analyze your situation and provide the appropriate response. Either department may be
reached toll-free at 800-752-8272 or 970-282-1200 for assistance.
Step #1: Basic Information
Take down all basic instrument information, including the following:
Model # example: AWAIII
Serial # example: 121
Product # example: 99-A312-00E
Note: All information above is located on the rear panel product label. If the tester has
special options installed that you are aware of, please note these. Any and all information
you know or can derive would be of help! A great tool would be a printout or sketch of
the waveforms displayed on the tester.
Step #2: Applications or Service Problem?
Generally, if a problem is noted Only when testing a specific motor/generator or other
coil type, then Applications would be involved. See Applications:What to do First!
Please call Baker Instrument Company, Sales Department for Applications assistance.

AWA Troubleshooting
If you can Not say the problem is associated with any One type of motor/generator, or
other coil type, then Service would be involved. See Service: What to do First!
Applications: What to do First!
Review the section below on Common Application Problems. Please have Basic
Information about your tester and specific information about the motor you are testing
available when calling or faxing to assist Baker Instrument Company personnel in
determining a solution to your problem.
Examples: Hp rating
kW rating
RPM rating
Operating voltage & current
How the item being tested is wound and/or number
and type of coils
Application of motor/generator
In short, any and all information you know or can derive from the motor
nameplate would be of help. A great tool is a printout or sketch of the waveforms
displayed on the tester. If you have a FAX available, send a draft to 970-282-
1010, attn: Applications.
Common Application Problems
There are a few common application-related problems which many users encounter.
Please review the following cases.
•The surge tester will not give the desired output test voltage for the apparatus
being tested.
This may happen when the test motor is too large for the instrument being used, or if the
impedance of the windings is too low. Refer to Surge Testing in the users manual for
specific test procedures and results. There may also be a problem with the tester in this
case. DO NOT continue testing until you have contacted Baker Instrument Company
Applications Department.
•Separation of compared wave patterns is seen when surge testing on coils that
are assumed to be good, even on brand new motors or windings. Often
separation is seen in all three possible comparisons but to varying degrees.
There may not be separation throughout the whole wave pattern.

AWA Troubleshooting
This situation can be seen in DC field or rotating poles. Be sure the coils being compared
are being tested in identical configurations; i.e. both coils are wound clockwise beginning
to end.
On very large equipment, slight differences in capacitance to ground may be the cause.
At low voltage levels, begin the test again with the black ground lead removed from the
motor frame. If the separation is now gone, capacitance to ground was affecting the test.
If the above situation does not apply there is probably an imbalance of the impedance
windings that is inherent to the design. The most common case is found in basket or
concentric wound motors. The phases are not magnetically balanced due to different coil
lengths.
•There is no damped sinusoidal wave pattern on the display when testing a coil.
The wave pattern rises on the left and then slowly drops as it trails off to the
right. It may or may not cross the zero/base line. The pattern looks like that in
the figure on the next page.
The test coil probably has too high an impedance to get a good working pattern. The coil
may be very high in resistance and turns count. The inability to surge test this coil, or
group of coils in series, will remain unless they can be broken down to smaller units of
lower impedance.
You may also have a broken test lead or lead to the test winding. With heavy use, test
leads should be checked weekly to ensure there is no breakage. Test leads are easily
checked for breakage by firmly grasping the boot and clip in one hand while pulling on
the lead with the other. A broken lead will stretch. A good lead will not.
Service: What to do First!
STOP! Do not aggravate any possible problem by INCREASING OUTPUT
TO MAXIMUM looking for a screen display!
Because history has shown that several simple solutions which do not require return of a
unit may arise, please perform the following checks.
Printer Check
•The printer does not work when “Print” is selected.
The digital tester will only output to an “Epson FX” compatible dot matrix printer
connected to a tester. Refer to the manual that came with your printer for the DIP switch
settings that make the printer “Epson FX” compatible.

AWA Troubleshooting
Open Condition Display
Note the figure below. Is the display you are
seeing like this?
If yes, the unit may have at least one broken test
lead causing the Open condition. The test lead
that corresponds to the TLS position that produces
this type of wave pattern is the lead, which is
broken. Verify this by pulling on the boot/clip
assembly of the lead. A broken test lead will
stretch. If it doesn’t repeat this procedure at one-foot intervals for the length of the lead.
If the leads of the tester are good, check the continuity of the winding under test.
Hipot Display Checks
The Hipot display shows only the VOLTAGE or CURRENT bar. One of three
problems might exist.
•The item being tested is in fact faulty and has either low insulation resistance or open
connections.
•The tester has an internal problem.
•The tester has a test lead problem as shown above for an Open Condition.
Disconnect the test leads from the motor and isolate the tester from any grounded surface.
Reduce the Output to minimum and attempt a Hipot test with an open lead condition.
Your display should indicate a rising voltage bar. The current bar may rise slightly but
fall back to zero when the output increase is stopped. Do not exceed 10% rotation of
the Output control! There is no need to perform this test at high voltage.
If the display still shows NO voltage bar call Baker Instrument Company Service
Department. Use a meter to confirm the insulation resistance of the device being tested.
Current bar operation can be tested by shorting test lead #1 and the ground lead together.
Under this condition, the voltage bar will NOT move off the zero line and the current bar
should rise very rapidlyand activate the Hipot Overcurrent Trip warning light (Hipot
Trip). If the Hipot Trip light does not light, check for open test leads at either test lead
#1 or the ground lead (see Open Condition Display). If the problem persists, contact
Baker Instrument Company Service Department.
Hipot Trip Check

AWA Troubleshooting
The Hipot Trip lamp either does not activate (under known-shorted conditions) or it
will not go out when test is discontinued.
Call the Service Department immediately for assistance. Please record information off
the unit and the specific problem prior to calling.
Open Ground Check
The Open Gnd Lamp is on and you are not able to test.
Answer these questions:
•Have you recently moved the unit to a new location with possibly an ungrounded
outlet?
•Is the unit being operated in a field where the AC power source is unknown?
•Is the unit being operated on a scope cart that has its own outlet or power source?
•Is the unit being operated using a two-wire extension cord?
•Are you testing from a generator?
•Is the unit being operated on a transformer-isolated circuit?
If you answer is yes to any of these questions, the unit is probably operational and
indicating you have an open AC line ground connection.
In the case of numbers 1 through 3 above, use an outlet tester to assure proper wiring
connections to the outlet. For number 4, replace the two-wire extension cord with a two-
wire/with ground extension cord. For number 5, or any of the conditions noted above,
use a grounding strap to a good earth ground.
In the case of number 6, call Baker Instrument Company Service for assistance. There is
an override available but precautions should be taken.
Limited Output Surge Waveform
The display shows a limited output (amplitude) surge waveform. The display rises
normally but stops at some point. Alternatively, you must continually increase the
output control for successive tests to achieve the same output test amplitude.
Call the Service Department immediately for assistance on this or any other abnormal
condition noted. Please record basic information from the tester and the specific problem
prior to calling.

AWA Troubleshooting
Precautions for Proper Operation
•Never raise the output control to attain a display from a blank screen!
•Never attempt “simulated” problems by disconnecting the leads and positioning
them to arc against each other!
•Never come in contact with the item being tested and the test leads or with the
tester and the item being tested!
•Never attempt a two-party operation. Always know what test is being
performed and WHEN!
•Never attempt a “Burn-Out” of a detected fault with the tester!
Warranty Return
Please review the Warranty Notes and Shipment sections at the beginning of this manual
before sending your tester to Baker Instrument Company for Warranty repair.
The Warranty Return Form on the following page MUST BE FILLED OUT and
RETURNED with the tester to obtain warranty service. This form will help to ensure
that Baker Instrument Company will identify the problem, quickly repair our unit, and
return it to you.

AWA Troubleshooting
Warranty Return Form
Please fill out all the following information and return this form with your tester. Make a
copy for your records before sending this to Baker Instrument Company.
Note: Be sure to follow the guidelines for shipping when sending your tester to Baker
Instrument Company.
Company Name: _________________________________________________
Your Name: _____________________________________________________
Mailing Address: _________________________________________________
Shipping Address: ________________________________________________
Phone Number: ___________________ Fax: __________________________
From the Name Plate on the back of the Tester:
Baker Product Number: ___________________________________________
Model Number: _________________________________________________
Serial Number: _________________________________________________
Description of the Problem:
Please give as much information as possible (what is not working, when it happened,
what was being tested, any unusual noises, etc.) even if you already talked to someone at
Baker Instrument Company by phone. Use the back of this form if necessary.
Person Contacted at Baker: ____________________________________
Ship the Tester to: Baker Instrument Company, 4812 McMurry Avenue, Fort Collins,
CO 80525, Attn: Service Manager

AWA Troubleshooting
Analyzer Troubleshooting Procedures
&Fault Listing
1. Rittal case removal. (AWAII only).
2. Windows NT crashes after installing a new printer driver or other software.
3. Windows NT crashes after installing a new printer driver of other software, giving a
blue screen.
4. Windows NT reports device errors upon boot up.
5. Windows NT crashes/NICcard does not work after an ISA network card is installed.
6. Floppy Disk Drive failure.
7. Hard disk drive failure.
8. AWA has a black screen after being transported even though fans are working.
9. AWA has a black/gray screen with very faint text seen, and VGA output appears
normal when an external VGA monitor is plugged in.
10. AWA never properly concludes a PI test, always stops after 5 minutes.
11. AWA tester gives a HiPot rip at the activation of every meg-ohm/HiPot/PI test, after
transport to a new testing location.
12. AWA tester gives a flat line surge after transport to a new testing location.
13. AWA gives unbalanced resistance results, such as .188, .257, .189 Ohms on a known
good three phase motor.
14. AWA always reports 2001 ohms on the resistance balance test; HiPot and surge test
appears to work normally.
15. AWA resistance test works normally, HiPot and surge do not.
16. AWA reaches arbitrary test voltage for meg-ohm/DC HiPot/PI Test and then stops at
that voltage.
17. AWA reaches an arbitrary test voltage for the surge test, then stops.
18. AWA has a lot of "Spikes" seen on the surge waveform, especially in the 50 micro-
seconds/div setting.

AWA Troubleshooting
19. AWA seems to have a flat line display for the surge test, all other tests work
normally.
20. AWA will not properly apply a programmed 6000 volt surge test, gives a flat top on
the surge display that stops at approximately 5800 volts.
21. AWA always gives "RELEASE THE TEST SWITCH" and/or "TURN OUTPUT
CONTROL KNOW TO ZERO" messages when attempting to begin test sequence.
22. AWA trips when trying to perform a meg-ohm/PI/HiPot on a motor with a long cable
run, yet other manufacturers meggers and HiPot show the cable run/motor as being
good.
23. AWA always "hangs" up after concluding a resistance balance test sequence.
24. When replacing either the 80-100 ADD/IO board or the 80-123 FAST A/D board,
they will not properly function.
25. AWA no longer works after installing a newer version of Analyzer software.
26. AWA does not properly save results, reporting "Unable to update temp results table".
27. AWA "Enable test id edit" password has been lost.
28. AWA does not work properly with PP30D, even after PP30D operation has been
verified with another AWA or D series Tester.
29. AWA gives NESTED failure on surge test sequences.
30. AWA/PP30D combination loses the "SAVE RESULTS" key, after completing a
PP30D test sequence.
31. AWA temperature probe gives erratic readings.
32. AWA will not boot properly, giving messages such as "Drive is not ready", "Insert
boot diskette in drive A", etc.
33. AWA crashes after installing Micro-Solutions Backpack CD-RW.
34. AWA Screen has a bunch of horizontal lines.
35. AWA smokes after plugging in into PATRIOT U.P.S. or SOLA.HEVI-DUTY U.P.S.
power supply.

AWA Troubleshooting
1. Rittal Case Removal
The Rittal case has been used on the AWA Series II model. Removal of this case is as
follows.
a. Locate and pry open, with a small slotted screwdriver, six plastic covers that overlap
six M4 screws that hold the top cover to the case assembly.
b. Remove these six (6) M4 screws and remove the top cover.
c. Locate and remove four (4) M16 x 16mm screws that secure the front panel to the
case assembly. Two screws are located to the left of the CRT bezel and two are
located to the right of the test lead set as they exit from the front panel.
d. Locate and remove five (5) M5 x 12mm black hex head screws that secure the bottom
chassis to the left and right side case L brackets. Two are located to the left of the
CRT shield, two are located to the right of the high voltage transformer, and one is
located underneath the test select switch.
e. Locate and unplug the two-(2) pin molex connector from the 12-volt fan to the
wiring harness. This fan is located directly behind the CRT tube. It may be
necessary to remove a tie wrap that secures the molex connector to the side case
frame.
f. Slide the front panel and bottom assembly forward to remove from the case assembly.
Access will now be gained to all internal components and assemblies except the I/O
board, A/D board and the Controller Board. See the following instructions for access to
these assemblies.
Handle Assembly for Rittal Case

AWA Troubleshooting
2. Windows NT crashes after installing a
new printer driver or other software.
a. Windows NT has specific requirements for drivers. Do not attempt to install any
software to the AWA tester unless it is known to be Windows NT Workstation 4.0
compliant. If software is going to be installed, be sure to log onto the system as User:
"Administrator" (case sensitive) Password: baker.
3. Windows NT crashes after installing a
new printer driver or other software, giving
a blue screen.
a. Window NT does keep a "LAST KNOWN GOOD HARDWARE
CONFIGURATION" available at system boot by pressing the spacebar on the
keyboard. It will then offer a change to restore the original configuration. Note: If a
boot up is successful, it will take over the last know good configuration and replace it.
It is not a tool designed to remove software, just a tool designed to help bail out an
improper installation.
b. Do not install software unless logged in as Administrator.
4. Windows NT reports device errors upon
boot up.
a. Windows NT gives the user a chance to go and look at what device has failed. To do
this, log in as Administrator. Click START, PROGRAMS, ADMINISTRATIVE
TOOLS (Common), EVENT VIEWER. You will see a listing of errors seen by the
system. Blue is good, Yellow is a warning, Red is bad. The messages may be
cryptic, but in many cases they can tell you what is wrong. It is beyond the scope of
this document to explain all possible Windows NT problems, but a few common ones
can be explained.
b. A common error message seen in the EVENT VIEWER is the "BP32DRV " device
driver. This is the device driver for the MICROSOLUTIONS BACKPACK

AWA Troubleshooting
CDROM. If it is not connected to the parallel port when the AWA boots up, it will
report the error. This can be cleared by Administrator by going to the CONTROL
PANEL, DEVICES, BP32DRV, and setting it to "DISABLED" under STARTUP.
c. Another message related to the AWA sometimes seen is problems related to the hard
disk drive. ATDISK may be reported as having an error. This may indicate
corrupted files or disk surface errors on the hard drive. A method to clear them is
provided with Windows NT: Login as Administrator, go to PROGRAMS,
COMMAND PROMP, then from the C:\command line type CHKDSK /F /R. You
will be asked if you wish to perform a scan disk the next time the systems starts,
select Y for yes and reboot. The machine will run through a routine called
AUTOCHK next time it is rebooted.
5. Windows NT Crashes/NIC card does not
work after an ISA network card is
installed.
a. Windows NT is NOT a plug n’ play capable operating system, it may not properly
accept a new circuit card without a rebuild of the operating system. Check the
Microsoft website: http://support.microsoft.com/support/kb/articles/Q131/3/03.asp for
hardware compatibility.
b. Check the BIOS at boot time; press the DEL key as the system is booting. It will put
you into the setup utility. Look for references to “Plug and Play capable OS” set this
statement to “NO” it will, for some types of NIC cards, clear the problem.
c. NIC card may require a more recent Microsoft service pack to properly function.
Most Baker Instrument AWA testers have service pack 4 or later. Also: After
installation of new pieces of hardware-it is usually important the service pack be
reinstalled to ensure proper function.
6. Floppy Disk Drive failure
a. The AWA uses a commercial grade floppy disk drive to allow file transfer via 3.5”
diskette. Keep you diskettes in a clean place. It is quite possible to destroy the floppy
drive and the diskette by inserting a greasy, gritty diskette.

AWA Troubleshooting
b. The drive is replaceable with any standard 3.5” disk drive. These items are available
at numerous retail outlets such as: Best Buy, Circuit City or nearly all computer sales
outlets, as well as on the Internet. They are usually less than $20 items.
c. Ribbon cable/power cable knocked loose: The rear of the disk drive contains a 4 pin
DC power connector, and a ribbon cable connector. One or both of these connectors
may have been knocked off its mounting pins. While most AWA tester have these
items glued in place for security, rough handling can knock them off.
7. Hard Disk Drive Failure
a. The AWA has used commercially available hard disk drives since inception. Over the
years the drive capacity has increased form 80 MB to 30 GB (at the time of this
writing) AWA testers manufactured since 2000 have included vibration dampers on
the hard disk. These dampers can be retrofitted to ANY AWA manufactured since
1996.
b. The drive is replaceable with any IDE compatible hard drive, with the following
caveats: The motherboards of units manufactured before (approximately) serial # 160
may not accept hard disks larger than 8.4GB. If possible, locate and use a smaller
storage capacity drive.
c. If the AWA crashes/locks up/shut down unexpectedly, you should manually run the
CHKDSK utility, with the /f /r switches as explained in step 4c. This may help
scan/clear errors before they cause total system failure.
d. The computer port of the AWA testers is a single channel IDE port. It will control
two IDE devices properly. If the hard drive is failed, the entire ribbon cable assembly
should be replaced at that time as well. New drives come with new cables. Use them.

AWA Troubleshooting
8. AWA has a black screen after being
transported, even though fans, etc… are
working
a. All AWA testers manufactured since 1994 have had LCD (Liquid Crystal Display)
panels. Due to the constant changes seen in the portable computer market, the I/O
connectors used on these displays are small and relatively weak. To repair this
problem, remove the top cover of the AWA tester, and get access to the rear of the
LCD panel. Often times, it is possible to restore function by pressing home the Hirose
connector on the back of the LCD.
b. Plug a VGA compatible external monitor into the VGA port of the AWA tester. If the
display appears on the screen, the problem is related to the LCD display.
9. AWA has a black/gray screen with very
faint text seen, and VGA output appeasrs
normal when an external VGA monitor is
plugged in.
a. All AWA testers have what is called “Back-light Inverters”, these are small power
supplies that convert DC to high frequency/high voltage AC, used to excite the TFT
LCD displays. If these fail, the screen will display text, but without backlight
excitation, the text appears very dim. Replace the backlight inverter, usually held in
place with double-sided tape.
10. AWA never properly concludes a PI
test, always stops after 5 minutes
a. Check the display properties, if the user has turned on the screen saver function, the
AWA will interpret the function as user intervention and abort the test. If a screen
saver is desired, be sure to set it to 15 minutes or longer before activation.

AWA Troubleshooting
11. AWA tester gives a HiPot trip at the
activation of every meg-ohm/HiPot/PI test,
after transport to a new location.
a. Check for the presence of a true earth ground at the AC power cord. The AWA will
not allow high voltage operation without a true earth ground. It will however, perform
a resistance balance test, since it does not involve high voltages. 2 prong extension
cords will render the AWA inoperable-evidenced by the illumination of the “OPEN
GROUND” lamp.
12. AWA tester gives a flat line surge after
transport to a new testing location.
a. The same answer as given in 11a applies, the AWA will not apply high voltages
without a safety ground
13. AWA gives unbalanced resistance
results, such as .188, .257, .189 Ohms on a
known good three phase motor.
a. Occasionally it is possible for the auto-ranging algorithm of the AWA tester to be
caught between resolution ranges. If this happens, the best way to verify the
performance of the AWA tester is to repeat the resistance balance test manually, and
give the AWA more settling time between the three test leads. If balances are then
seen as accurate, the problem was in the stabilization algorithm. Versions of AWA
software after 3.0 have improvements in this area. If possible upgrade the AWA
program.
b. Clip the three red test leads together, and perform the resistance balance test: The
AWA should indicate values of less than approximately .005 ohm with all legs

AWA Troubleshooting
clipped together. If one or more of the leads indicates a much different value the
following conditions may exist:
Broken test lead, verify test lead integrity with an ohm-meter, check for loose or broken
test leads, clips.
Pitted high voltage relay contact on the indicated test lead, re-run the test several times. If
a value change is seen, the relay may need to be replaced.
Welded high voltage relay on the suspect test lead. If connected to live AC circuits, these
relays may be damaged or welded in the N.C. position.
14. AWA always reports 2001 ohms on the
resistance balance test; HiPot and surge
tests appear to work normally.
a. In AWA Series II tester, it was possible for the 80-125 board to be unseated after
rough handling. Remove the top lid, and verify the presence of the 80-125 board in
it’s mother board slot. Also verify the presence of the Neoprene foam stripping on the
top of the case that should hold the card in place.
b. Bad or damaged 80-125 winding resistance board.
c. Broken or damaged test leads
d. Faulty 80-100 AD/IO
15. AWA resistance test works normally,
HiPot and surge do not.
a. In this case, it is almost always a problem with the 80-124 HVDC board; it does not
influence the resistance tests very much. For example: on occasion the DC/DC
converter used on this card has been knocked out of it’s socket due to rough handling.
Replacement fixes the problem.
b. Damaged or welded Surge/Hi-Pot relay:

AWA Troubleshooting
c. 80-100 AD/IO board damaged or faulty.
16. AWA reaches an arbitrary test voltage
for meg-ohm/DC HiPot/PI test and then
stops at that voltage
Example: Test requires 5600VDC, the AWA will ramp normally to 1800 volts, then
stops. The test times keeps running and the test will never conclude.
a. Blown or damaged U10 IC on the 80-100 AD/IO board
b. Blown or damaged 80-124 HVDC board
17. AWA reaches an arbitrary test voltage
for the surge test then stops.
a. Blown or damaged U10 IC on the 80-100 AD/IO board.
b. Blown or damaged 80-124 HVDC board.
18. AWA has a lot of "Spikes" seen on the
surge waveform, especially in the 50 micro-
seconds/div setting.
a. The problem may be the A/D converter or the FIFO chip on the 80-123 Fast A/D
board; these are devices U3 and U5 respectively. Replace them one at a time to
verify.

AWA Troubleshooting
19. AWA seems to have a flat line display
for the surge test, all other tests work
normally.
Voltage is applied to the coil or motor, and the winding may even arc, yet still a flat line
on the screen.
a. This problem is most often associated with the K2 relay on the 80-123 Fast/AD
board. It may be stuck in the EXT Surge position; thus the surge wave of the AWA
itself does not make it to the A/D converter. Use an ohmmeter to verify integrity, and
replace if faulty. If the AWA is not to be used with the Baker Instrument PP30D, it
can be jumpered out with buss wires across C to N.O.
b. Shorted RG174 BNC coaxial readout cable at P2. Check this connector with an
ohmmeter, it should read approximately 1100 ohms across center to shield when
disconnected from the Fast A/D board.
c. AD/IO control line INT/EXT non-functional on the 80-100 AD/IO board.
d. Connector DB15 J5 knocked loose from the front of the 80-123 Fast A/D board.
e. Welded KC-18 high voltage relay matrix, due to inadvertent connection to “live” AC
mains.
20. AWA will not properly apply a
programmed 6000-volt surge test.
The AWA gives a flat top on the surge display that stops at approximately 5800 volts.
AWA may keep surge testing the motor, until it reaches maximum output, and stops.
Tests above and below.
a. This, in all cases, is due to improper calibration of the surge test. This is best
corrected by one or both of the following methods:
b. Set a target voltage for the programmed surge test of slightly higher or lower than
6000V, in this case 5800V or 6100V. The AWA will use the lower/higher range
settings, which will result in the AWA properly performing the test.

AWA Troubleshooting
c. Reference the AWA calibration procedure, it gives detailed steps to follow that will
allow the user to correct the setting of the attenuator that is used when a 6000 V test is
programmed. The idea is to verify the AWA will not flat top the attenuator in that
range. Set it so the AWA will apply 6100 Volts in that range before switching the
screen scaling to the higher range used for tests to 12000V.
21. AWA always give "Release THE TEST
SWITCH" and/or "TURN OUTPUT
CONTROL KNOB TO ZERO" message
when attempting to begin test sequence.
a. This message is almost always related to the 80-100 AD/IO board, and the circuitry
responsible for initiating a test. Replace the entire assembly, or the following I.C.’s
b. U31,32 Mux08 multi-plexers
c. U10 DAC
d. U22 AMP01
e. U11 SMP11GY
f. U6 ADC912
g. The ADC clock (crystal) may be damaged or broken. A 1MHZ signal should be seen
at U6 pin 17 and 18. It should be approximately 4.5VDC in amplitude.
h. If the front panel of the AWA has been loosened or removed to service the unit, the
AUX DB25 connector may have been damaged. Look at the rear of it. You will see a
bunch of .01 microfarad capacitors soldered across the AUX pins. If these have
shorted out to each other by being set on something, they will give unknown signals
to the AD/IO and confuse it. Use needle nose pliers to separate the capacitors.
22. AWA trips when trying to perform a
meg-ohm/PI/HiPot on a motor with a long
cable run.

AWA Troubleshooting
This happens even when other manufacturers meggers and hi-pots show the cable
run/motor as being good. AWA seems to perform properly on all other motors and
conditions.
a. In certain cases it is possible for the AWA to be programmed to coincide with the
natural resonance of the cable run and the motor. It is almost always cleared by
changing the “STEP VOLTAGE” field in the DC TESTS screen. For example: STEP
VOLTAGE is set to ‘”50” and the AWA will trip itself. By changing this setting to
“25” or “15” the test sequence can be concluded successfully.
23. AWA always "hangs" up after
concluding a resistance balance test
sequence.
a. Use CTRL –ALT –Del to bring up the task manager and end the Analyzer
application. Don’t just hit the circuit breaker. You may damage or destroy Windows
NT the AWA operating system.
b. This message is almost always related to the 80-100 AD/IO board, and the circuitry
responsible for initiating a test. Replace the entire assembly, or the following I.C.’s
c. U31,32 Mux08 multi-plexers
d. U10 DAC
e. U22 AMP01
f. U11 SMP11GY
g. U6 ADC912
h. The ADC clock (crystal) may be damaged or broken. A 1MHZ signal should be seen
at U6 pin 17 and 18. It should be approximately 4.5VDC in amplitude.
i. If the front panel of the AWA has been loosened or removed to service the unit, the
AUX DB25 connector may have been damaged. Look at the rear of it. You will see a
bunch of .01 microfarad capacitors soldered across the AUX pins. If these have
shorted out to each other by being set on something, they will give unknown signals
to the AD/IO and confuse it. Use needle nose pliers to separate the capacitors.