Kent-Moore J-39916-A User manual

J-39916-A
DELCO AUDIO SYSTEM
DIAGNOSTIC KIT
INSTRUCTIONS
Also, when using the combination tone, comparative AC voltage measurements can be
made on the speaker terminals, provided the fade and balance controls are in the detent
position. With these voltage measurements, a determination can be made in the diagno-
sis of speaker or amplifier. If the amplifier system of the vehicle is operating normal, the
AC voltages should be very close or the same in value.
SPEAKER/GRILL RATTLE TEST - (50 Hz to 2kHz swept sine)
This portion of the CD can be used to diagnose speaker and grill rattles. The first test
is two variable frequency tones played back to back which can help you find or verify
a speaker rattle or buzz. Tone two is also a sweep, but frequency change is at a much
slower rate. This can be used in the repair of a speaker rattle or buzz. If the problem has
already been isolated, the fade and balance controls can be set to the proper location and
the test tones can be played in the specific problem area.
NOISE DIAGNOSTICS - (Dead Space)
This portion can be used for noise diagnostics; such as alternator whine, switch pops, etc.
This portion of the diagnostic CD may be used in conjunction with the audio diagnostics
section in the service manual.
D. SERVICE PARTS LIST - Available from Kent-Moore 1-800-345-2233
J-39916 Delco Audio System Diagnostic Kit:
• J-39916-1 DiagnosticCassetteTape
• J-39916-2 CleaningCassette
• J-39916-3 CleaningFluid
• J-39916-4 CleaningRellPads
• J-39916-5 Wax Pencil
• J-39916-6A StorageCase
• J-39916-7B Instructions
• J-39916-8 DiagnosticCompactDisc
J 39916-A
DELCO AUDIO SYSTEM
DIAGNOSTIC KIT
INSTRUCTIONS
FORM-7B

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2
J-39916 Delco Audio System Diagnostic Kit
The Delco Audio System Diagnostic Kit was developed to diagnose the Delco Active
Audio System and Delco Audio Systems with a pre-recorded diagnostic cassette tape or
compactdisc(CD).RefertotheappropriateGMservicemanualforspecificinstructions.
Instruction Book Contents:
A. CassettePlayerPreparation
B. CassetteTapeDiagnostics
C. Compact Disc Diagnostics
D. ServicePartsList
A. CASSETTE PLAYER PREPARATION
(This preparation will ensure proper diagnosis)
Inspection of the player must take place before using the cleaning and diagnostic
cassettes. Using a light source, carry out a visual check through the cassette entry flap
and ensure that there is not debris inside the player and that tape is not wrapped around
the capstan.
Beforeproceedingwiththediagnosticcassette,thetonehead,pinchwheel(s)and
capstan(s) must be cleaned. To do this, use the head cleaning cassette as follows:
1. Puttwo(2)dropsofthecleaningsolutiononeachfeltpad.
2. Insert the cleaning cassette into the cassette deck and play for 20 seconds.
(Press“play”buttonifthedeckdoesnotstartautomatically.Forautoreverse
decks,engagethe“autoreverse”featureandcleanforanother20seconds.)
3. Removetheheadcleaningcassette.Nowallow2-3minutesofdryingtime
before proceeding.
NOTE:Itisrecommendedthattheheadcleaningcassetteisusedevery
10 to 15 hours of play time.
Replacecleaningcartridges
when the felt pads look dirty.
The diagnostic cassette can now be
played and will highlight problems
with audio reproduction.
Auto
reverse
tape drive
Tape head
Capstan
Pinchroller
7
Always compare the front speakers to front, and rear speakers to rear. Don’t compare the
front speaker to rear speaker because they could be different speakers or their mounting
environment could cause them to sound different.
Thethreebasictonesusedtotestandevaluatebaselevelspeakers,orothercomplex
speaker systems are a bass (50 Hz sine) tone, mid (500 Hz warble) tone,
a tweeter (9kHz spectral) tone. The combination tone is a blend of the above
three tones.
BASS SPEAKER TEST - (50 Hz sine)
The 50 Hz tone is used to evaluate the bass response of an audio system. This tone is
also helpful in evaluating audio systems which have separate subwoofer amplifiers and
speakers.
MID-RANGE SPEAKER TEST - (500 Hz warble tone)
The 500 Hz warble tone is used for the evaluation of mid range speaker response. This
tone is qualified as a warble tone because it has different audio characteristics than a sine
tone. This tone produces a warble sound. At these mid-range frequencies, it is better to
use a warble tone than a sine wave because the location of warble tone source, such as
a speaker, is easier to identify. A normal sine tone can set up a standing wave within a
vehicle which can make it difficult to determine its source location.
TWEETER TEST - (9kHz spectral tone)
The 9kHz spectral tone is used for tweeter or high frequency evaluation. This tone sounds
likeagroupofcricketschirping.Thistypeoftoneisusedfortworeasons.One,much
like the warble tone, it is easy to locate its source, and two, this type of tone is easier to
identify for those people with high end hearing loss problems.
ALL SPEAKER TEST - (Combination tone)
With the combination tone, you will be able to quickly diagnose overall audio performance
in a vehicle. This tone can be used for numerous audio problems, such as distorted or
nosoundfromspeakerorspeakers.Listeningtothecombinationtone,youshouldbe
able to hear three distinct sounds. A low pitch steady tone of 50 Hz, a medium frequency
warbling tone of 500 Hz, and a high frequency hiss or cricket type of sound about 9kHz.
Concentrateontheappropriateelementofthetestsignal;Low,Medium,orHighasyou
listen to the different speaker locations by means of the fade and balance controls. This
tonecanbeanexcellentsignaltouseinthediagnosisofcoaxialspeakers.For example,
ifacoaxialspeakerisnotfunctioningproperly,adirectcomparisonoftherighttoleft
speaker, or visa versa, can determine if the tweeter or woofer in the speaker assembly is
inoperative.

(Continued)
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B. CASSETTE TAPE DIAGNOSTICS
Cassette Tape Contents
Side 1 Active Audio System Diagnostics
GeneralInstruction/Introduction
FrontBassSpeakerTestInstructions
BassSpeakerTest(50HzTone)
FrontMid-rangeSpeakerTestInstructions
Mid-range Speaker Test (500 Hz Warble Tone)
FrontTweeterSpeakerTestInstructions
Tweeter Speaker Test (9kHz Spectral Tone)
RearBassSpeakerTestInstructions
BassSpeakerTest(50HzTone)
RearMid-rangeSpeakerTestInstructions
Mid-range Speaker Test (500 Hz Warble Tone)
RearTweeterSpeakerTestInstructions
Tweeter Speaker Test (9kHz Spectral Tone)
Combined Test Instructions
Combined Test (Combination Tone)
NOTE: DiagnosticChartisonBackofDiagnosticKitStorageCase
Side 2 Audio System Diagnostics
GeneralInstructions/Introduction
BassSpeakerTestInstructions
BassSpeakerTest(50HzTone)
Mid-range Speaker Test Instructions
Mid-range Speaker Test (500 Hz Warble Tone)
Tweeter Speaker Test Instructions
Tweeter Speaker Test ( 9kHz Spectral Tone)
Combined Test Instructions
Combined Test (Combination Tone)
SpeakerandGrillRattleTestInstructions
SpeakerandGrillRattleTest(FastSweep)
SpeakerandGrillRattleTest(SlowSweep)
Motor Speed Test Instructions
Motor Speed Test
TapeHeadCleaningProcedures
NoiseDiagnosticsTestInstructions
NoiseDiagnosticsTest(recordedquiet)
6
C. COMPACT DISC DIAGNOSTICS
Compact Disc Contents
Track 1 GeneralInstructions/Introduction
Track 2 BassSpeakerTest Instructions
Track 3 BassSpeakerTest (50Hztone)
Track 4 Mid-range Speaker Test Instructions
Track 5 Mid-range Speaker Test (500 Hz warble tone)
Track 6 Tweeter orHighFrequencySpeakerTest Instructions
Track 7 Tweeter orHighFrequencySpeakerTest
(9kHz Spectral Tone)
Track 8 Combined Test Instructions
Track 9 Combined Test (combination tone)
Track 10 SpeakerandGrillRattlesTest Instructions
Track 11 SpeakerandGrillRattlesTest (fastsweep)
Track 12 SpeakerandGrillRattlesTest (slowsweep)
Track 13 NoiseDiagnosticsTest Instructions
Track 14 NoiseDiagnosticsTest (recordedquiet)
DIAGNOSTIC TEST CD
TheDiagnosticTest CD(PNJ-39916-8)hasbeendevelopedtodiagnoseseveralaudio
complaints. The test CD will provide the technician with test tones for the following tests.
It will be helpful to view these tests before proceeding.
FUNCTION
• Bass/subwoofertest
• Midrangespeakertests
• Doortweetertest
• Allspeakertest
• Speakerbuzzandrattletest
• Noisediagnosis
- Itwillalsobeusefulinthediagnosisofcoaxialspeakers.
Warning: Improper use of this diagnostic CD can result in speaker or amplifier damage.
Always begin testing procedures using minimum volume, working up to an appropriate
level.
Eachsignalwillbeplayedforveminutes,startingwiththelowfrequency tone.Usethe
fadeandbalancecontrolstoevaluatethespeakers.For example,whenthetestsignal
begins, fade full front and check the speaker response of the right, and left speakers with
the balance control. Then, fade full rear and check the rear speakers in the same manner.
There should be enough time to check all speakers with each signal. If the signal ends,
and the test is not completed, simply replay the necessary signal.
3

(Continued)
(Continued)
DIAGNOSTIC TEST TAPE
TheDiagnosticTestTape(PNJ-39916-1)Side2hasbeendevelopedtodiagnoseseveral
audio complaints. The test tape will prompt the technician through the following tests. It
will be helpful to view these tests before proceeding.
FUNCTION
• Bass/Subwoofertest
• Midrangespeakertest
• Doortweetertest
• Allspeakertest
• Speakerbuzzandrattletest
• Motorspeedtest
• InstructionsonTapeHeadCleaningProcedures
• Noisediagnosis
Always compare the front speakers to front, and rear speakers to rear. Don’t compare
front speaker to rear speaker because they could be different speakers or their mounting
environment could cause them to sound different.
Thethreebasictonesusedtotestandevaluatecoaxialspeakers,orothercomplexspeaker
systems are a bass (50 Hz sine) tone, mid (500 Hz warble) tone, and
a tweeter (9kHz spectral) tone. The combination tone is a blend of the above
three tones.
BASS SPEAKER TEST - (50 Hz sine)
The 50 Hz tone is used to evaluate the bass response of an audio system. This tone is also
helpful in evaluating audio systems which have separate subwoofer amplifiers and speak-
ers.
MID-RANGE SPEAKER TEST - (500 Hz warble tone)
The 500 Hz warble tone is used for the evaluating of mid-range speaker response. This
tone is qualified as a warble tone because it has different audio characteristics than a sine
tone. This tone produces a warble sound. At these mid-range frequencies, it is better to
use a warble tone than a sine wave because the location of warble tone source, such as
a speaker, is easier to identify. A normal sine tone can set up a standing wave within a
vehicle which can make it difficult to determine its source location.
TWEETER SPEAKER TEST - (9kHz spectral zone)
The 9kHz spectral tone is used for tweeter or high frequency evaluation. This tone sounds
likeagroupofcricketschirping.Thistypeoftoneisusedfortworeasons.One,muchlike
the warble tone, it is easy to locate its source, and two, this type of tone is easier to identify
for those people with high end hearing loss problems.
ALL SPEAKER TEST - (Combination tone)
The combination tone can be used for numerous audio problems such as distorted or no
sound from a speaker or speakers. When using the combination tone, comparative AC
voltage measurements can be made on the speaker terminals, provided the fade and bal-
ance controls are in the detent position. With these voltage measurements, a determina-
tion can be made in the diagnosis of speaker or amplifier.
SPEAKER/GRILL RATTLE TEST - (50 Hz to 8kHz swept sine)
Thenextportionofthetapecanbeusedtodiagnosespeakerandgrillrattles.Therst
test is two variable frequency tones played back to back. The second test is a variable
frequency tone,butfrequency changeisatamuchslowerrate.Bothtestscanbeused
to repair a speaker rattle or buzz. If the problem has already been isolated, the fade and
balance controls can be set to the proper location and the test tones can be played in the
specific problem area.
MOTOR SPEED - (Timed section in tape)
There is a two minute time period marked in this section of tape for the purpose of check-
ing the cassette tape motor speed. This portion of the diagnostic tape can be used to
verify or resolve problems when a customer complains that the audio from the cassette
tape sounds abnormal. In some cases, improper tape motor speed can cause audio
abnormalities.Ifthetimetakenforthistestisbetweenoneminuteandfty-sixseconds
to two minutes and one second, the tape motor speed is within tolerance.
TAPE HEAD CLEANING PROCEDURES
The recommended time interval for cleaning is fifteen hours for best performance, and
every fifty hours to prevent damage to the tape head. The preferred tape head cleaner is
availableaspartoftheAudioSystemDiagnosticKit,Part Number
J-39916-2.
NOISE DIAGNOSTICS - (Dead Space)
This portion can be used for noise diagnostics, such as alternator whine, switch pops, etc.
This portion of the diagnostic tape may be used in conjunction with the audio diagnostics
section of the service manual.
5
4

(Continued)
(Continued)
DIAGNOSTIC TEST TAPE
TheDiagnosticTest Tape(PNJ-39916-1)Side2hasbeendevelopedtodiagnoseseveral
audio complaints. The test tape will prompt the technician through the following tests. It
will be helpful to view these tests before proceeding.
FUNCTION
• Bass/Subwoofertest
• Midrangespeakertest
• Doortweetertest
• Allspeakertest
• Speakerbuzzandrattletest
• Motorspeedtest
• InstructionsonTapeHeadCleaningProcedures
• Noisediagnosis
Always compare the front speakers to front, and rear speakers to rear. Don’t compare
front speaker to rear speaker because they could be different speakers or their mounting
environment could cause them to sound different.
Thethreebasictonesusedtotestandevaluatecoaxialspeakers,orothercomplexspeaker
systems are a bass (50 Hz sine) tone, mid (500 Hz warble) tone, and
a tweeter (9kHz spectral) tone. The combination tone is a blend of the above
three tones.
BASS SPEAKER TEST - (50 Hz sine)
The 50 Hz tone is used to evaluate the bass response of an audio system. This tone is also
helpful in evaluating audio systems which have separate subwoofer amplifiers and speak-
ers.
MID-RANGE SPEAKER TEST - (500 Hz warble tone)
The 500 Hz warble tone is used for the evaluating of mid-range speaker response. This
tone is qualified as a warble tone because it has different audio characteristics than a sine
tone. This tone produces a warble sound. At these mid-range frequencies, it is better to
use a warble tone than a sine wave because the location of warble tone source, such as
a speaker, is easier to identify. A normal sine tone can set up a standing wave within a
vehicle which can make it difficult to determine its source location.
TWEETER SPEAKER TEST - (9kHz spectral zone)
The 9kHz spectral tone is used for tweeter or high frequency evaluation. This tone sounds
likeagroupofcricketschirping.Thistypeoftoneisusedfortworeasons.One,muchlike
the warble tone, it is easy to locate its source, and two, this type of tone is easier to identify
for those people with high end hearing loss problems.
ALL SPEAKER TEST - (Combination tone)
The combination tone can be used for numerous audio problems such as distorted or no
sound from a speaker or speakers. When using the combination tone, comparative AC
voltage measurements can be made on the speaker terminals, provided the fade and bal-
ance controls are in the detent position. With these voltage measurements, a determina-
tion can be made in the diagnosis of speaker or amplifier.
SPEAKER/GRILL RATTLE TEST - (50 Hz to 8kHz swept sine)
Thenextportionofthetapecanbeusedtodiagnosespeakerandgrillrattles.Therst
test is two variable frequency tones played back to back. The second test is a variable
frequencytone,butfrequencychangeisatamuchslowerrate.Bothtestscanbeused
to repair a speaker rattle or buzz. If the problem has already been isolated, the fade and
balance controls can be set to the proper location and the test tones can be played in the
specific problem area.
MOTOR SPEED - (Timed section in tape)
There is a two minute time period marked in this section of tape for the purpose of check-
ing the cassette tape motor speed. This portion of the diagnostic tape can be used to
verify or resolve problems when a customer complains that the audio from the cassette
tape sounds abnormal. In some cases, improper tape motor speed can cause audio
abnormalities.Ifthetimetakenforthistestisbetweenoneminuteandfty-sixseconds
to two minutes and one second, the tape motor speed is within tolerance.
TAPE HEAD CLEANING PROCEDURES
The recommended time interval for cleaning is fifteen hours for best performance, and
every fifty hours to prevent damage to the tape head. The preferred tape head cleaner is
availableaspartoftheAudioSystemDiagnosticKit,PartNumber
J-39916-2.
NOISE DIAGNOSTICS - (Dead Space)
This portion can be used for noise diagnostics, such as alternator whine, switch pops, etc.
This portion of the diagnostic tape may be used in conjunction with the audio diagnostics
section of the service manual.
5
4

(Continued)
(Continued)
B. CASSETTE TAPE DIAGNOSTICS
Cassette Tape Contents
Side 1 Active Audio System Diagnostics
GeneralInstruction/Introduction
Front BassSpeakerTest Instructions
BassSpeakerTest (50HzTone)
Front Mid-rangeSpeakerTest Instructions
Mid-range Speaker Test (500 Hz Warble Tone)
Front Tweeter SpeakerTest Instructions
Tweeter Speaker Test (9kHz Spectral Tone)
RearBassSpeakerTest Instructions
BassSpeakerTest (50HzTone)
RearMid-rangeSpeakerTest Instructions
Mid-range Speaker Test (500 Hz Warble Tone)
RearTweeter SpeakerTest Instructions
Tweeter Speaker Test (9kHz Spectral Tone)
Combined Test Instructions
Combined Test (Combination Tone)
NOTE: DiagnosticChartisonBackofDiagnosticKitStorageCase
Side 2 Audio System Diagnostics
GeneralInstructions/Introduction
BassSpeakerTest Instructions
BassSpeakerTest (50HzTone)
Mid-range Speaker Test Instructions
Mid-range Speaker Test (500 Hz Warble Tone)
Tweeter Speaker Test Instructions
Tweeter Speaker Test ( 9kHz Spectral Tone)
Combined Test Instructions
Combined Test (Combination Tone)
SpeakerandGrillRattleTest Instructions
SpeakerandGrillRattleTest (Fast Sweep)
SpeakerandGrillRattleTest (SlowSweep)
Motor Speed Test Instructions
Motor Speed Test
TapeHeadCleaningProcedures
NoiseDiagnosticsTest Instructions
NoiseDiagnosticsTest (recordedquiet)
6
C. COMPACT DISC DIAGNOSTICS
Compact Disc Contents
Track1 GeneralInstructions/Introduction
Track2 BassSpeakerTestInstructions
Track3 BassSpeakerTest(50Hztone)
Track 4 Mid-range Speaker Test Instructions
Track 5 Mid-range Speaker Test (500 Hz warble tone)
Track6 TweeterorHighFrequencySpeakerTestInstructions
Track7 TweeterorHighFrequencySpeakerTest
(9kHz Spectral Tone)
Track 8 Combined Test Instructions
Track 9 Combined Test (combination tone)
Track10 SpeakerandGrillRattlesTestInstructions
Track11 SpeakerandGrillRattlesTest(fastsweep)
Track12 SpeakerandGrillRattlesTest(slowsweep)
Track13 NoiseDiagnosticsTestInstructions
Track14 NoiseDiagnosticsTest(recordedquiet)
DIAGNOSTIC TEST CD
TheDiagnosticTestCD(PNJ-39916-8)hasbeendevelopedtodiagnoseseveralaudio
complaints. The test CD will provide the technician with test tones for the following tests.
It will be helpful to view these tests before proceeding.
FUNCTION
• Bass/subwoofertest
• Midrangespeakertests
• Doortweetertest
• Allspeakertest
• Speakerbuzzandrattletest
• Noisediagnosis
- Itwillalsobeusefulinthediagnosisofcoaxialspeakers.
Warning: Improper use of this diagnostic CD can result in speaker or amplifier damage.
Always begin testing procedures using minimum volume, working up to an appropriate
level.
Eachsignalwillbeplayedforveminutes,startingwiththelowfrequencytone.Usethe
fadeandbalancecontrolstoevaluatethespeakers.Forexample,whenthetestsignal
begins, fade full front and check the speaker response of the right, and left speakers with
the balance control. Then, fade full rear and check the rear speakers in the same manner.
There should be enough time to check all speakers with each signal. If the signal ends,
and the test is not completed, simply replay the necessary signal.
3

(Continued)
2
J-39916 Delco Audio System Diagnostic Kit
The Delco Audio System Diagnostic Kit was developed to diagnose the Delco Active
Audio System and Delco Audio Systems with a pre-recorded diagnostic cassette tape or
compactdisc(CD).RefertotheappropriateGMservicemanualforspecificinstructions.
Instruction Book Contents:
A. CassettePlayerPreparation
B. CassetteTapeDiagnostics
C. Compact Disc Diagnostics
D. ServiceParts List
A. CASSETTE PLAYER PREPARATION
(This preparation will ensure proper diagnosis)
Inspection of the player must take place before using the cleaning and dia
cassettes. Using a light source, carry out a visual check through the cassette entr
and ensure that there is not debris inside the player and tha
the capstan.
Beforeproceedingwiththediagnosticcassette,the
capstan(s) must be cleaned. To do this, use the head cleaning cassette as follo
1. Puttwo(2)dropsofthecleaning solutiononeach
2. Insert the cleaning cassette into the cassette deck and play for 20 seconds.
(Press“play”buttonifthedeckdoesnotstart
decks,engagethe“autoreverse”featureand
3. Removetheheadcleaning cassette.Nowallo
before proceeding.
NOTE:Itisrecommendedthattheheadcleaning
10 to 15 hours of play time.
Replacecleaning cartridges
when the felt pads look dirty.
The diagnostic cassette can now be
played and will highlight problems
with audio reproduction.
reverse
tape drive
Tape head
Capstan
Pinch
7
Always compare the front speakers to front, and rear speakers to rear. Don’t compare the
front speaker to rear speaker because they could be different speakers or their mounting
environment could cause them to sound different.
Thethreebasictonesusedtotestandevaluatebaselevelspeakers,orothercomplex
speaker systems are a bass (50 Hz sine) tone, mid (500 Hz warble) tone,
a tweeter (9kHz spectral) tone. The combination tone is a blend of the above
three tones.
BASS SPEAKER TEST - (50 Hz sine)
The 50 Hz tone is used to evaluate the bass response of an audio system. This tone is
also helpful in evaluating audio systems which have separate subwoofer amplifiers and
speakers.
MID-RANGE SPEAKER TEST - (500 Hz warble tone)
The 500 Hz warble tone is used for the evaluation of mid range speaker response. This
tone is qualified as a warble tone because it has different audio characteristics than a sine
tone. This tone produces a warble sound. At these mid-range frequencies, it is better to
use a warble tone than a sine wave because the location of warble tone source, such as
a speaker, is easier to identify. A normal sine tone can set up a standing wave within a
vehicle which can make it difficult to determine its source location.
TWEETER TEST - (9kHz spectral tone)
The 9kHz spectral tone is used for tweeter or high frequency evaluation. This tone sounds
likeagroupofcricketschirping.Thistypeoftoneisusedfortworeasons.One,much
like the warble tone, it is easy to locate its source, and two, this type of tone is easier to
identify for those people with high end hearing loss problems.
ALL SPEAKER TEST - (Combination tone)
With the combination tone, you will be able to quickly diagnose overall audio performance
in a vehicle. This tone can be used for numerous audio problems, such as distorted or
nosoundfromspeakerorspeakers.Listeningtothecombinationtone,youshouldbe
able to hear three distinct sounds. A low pitch steady tone of 50 Hz, a medium frequency
warbling tone of 500 Hz, and a high frequency hiss or cricket type of sound about 9kHz.
Concentrateontheappropriateelementofthetestsignal;Low,Medium,orHighasyou
listen to the different speaker locations by means of the fade and balance controls. This
tonecanbeanexcellentsignaltouseinthediagnosisofcoaxialspeakers.Forexample,
ifacoaxialspeakerisnotfunctioningproperly,adirectcomparisonoftherighttoleft
speaker, or visa versa, can determine if the tweeter or woofer in the speaker assembly is
inoperative.

Also, when using the combination tone, comparative AC voltage measurements can be
made on the speaker terminals, provided the fade and balance controls are in the detent
position. With these voltage measurements, a determination can be made in the diagno-
sis of speaker or amplifier. If the amplifier system of the vehicle is operating normal, the
AC voltages should be very close or the same in value.
SPEAKER/GRILL RATTLE TEST - (50 Hz to 2kHz swept sine)
This portion of the CD can be used to diagnose speaker and grill rattles. The first test
is two variable frequency tones played back to back which can help you find or verify
a speaker rattle or buzz. Tone two is also a sweep, but frequency change is at a much
slower rate. This can be used in the repair of a speaker rattle or buzz. If the problem has
already been isolated, the fade and balance controls can be set to the proper location and
the test tones can be played in the specific problem area.
NOISE DIAGNOSTICS - (Dead Space)
This portion can be used for noise diagnostics; such as alternator whine, switch pops, etc.
This portion of the diagnostic CD may be used in conjunction with the audio diagnostics
section in the service manual.
D. SERVICE PARTS LIST - Available from Kent-Moore 1-800-345-2233
J-39916 Delco Audio System Diagnostic Kit:
• J-39916-1 DiagnosticCassetteTape
• J-39916-2 CleaningCassette
• J-39916-3 CleaningFluid
• J-39916-4 CleaningRellPads
• J-39916-5 WaxPencil
• J-39916-6A StorageCase
• J-39916-7B Instructions
• J-39916-8 DiagnosticCompactDisc
J 39916-A
DELCO AUDIO SYSTEM
DIAGNOSTIC KIT
INSTRUCTIONS
J-39916-7B