QuestionHi Tom,
Guess you are very busy, kindly keep me in mind on the Nissan Maxima Bose stereo system.
You said you are going to check the system diagrams. If there is anything to purchase to fix the problem, kindly let me know where to get them.
Regards
Lekan
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Followup To
Question -
Hi Tom,
Here is the part no and Model number for the Bose Car Stereo system.
CN503
PN-2083D
Thanks for your kind help.
Lekan
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Followup To
Question -
Hi Tom,
Thanks a lot for the tip, i did all the checks you mentioned, the 12Volts is present at the rear speakers terminals.
I checked inside the amps in the speaker units and the FETs look a bit suspicious, i replaced them without any success, kindly let me know which processor chip may need to be replaced.
Best regards
Lekan
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Followup To
Question -
Hi Tom,
I have a 96 Nissan Maxima Bose car Stereo System with small power button.
The system switches on fine but no output on all the speakers, i checked the fuses in the car system and found them intact, kindly advice on what else to check and likely fault. The rear speakers have inbuilt amps.
Also let me know where the stereo amplifier is located pls.
Please HELP.
Answer -
Lekan,
With the Bose stereo systems the amps in most vehicles are mounted with the speakers, however on some you will find the main audio power amp behind the stereo within the dash. If your stereo has NO sound a syou mentioned you may want to first check bu using a volt meter and measuring the connector the goes into the rear speakers. The powered speakers require 12 volts to function. If you have 12 volts at the speaker, the audio process chip inside the head unit may be defective.
TOM,
T&D ELECTRONICS
tdeser@zoominternet.net
Answer -
Lekan,
The low level audio output to the speaker amps may be muted out due to a faulty part inside the head unit. Please give me the complete model number of your Bose stereo unit. I can look over the service data and give you some ideas on what to look for.
TOM,
T&D ELECTRONICS
tdeser@zoominternet.net
Answer -
Lekan,
I'll check out the schematic/s and try to point you in the right direction to locate the problem. Please give me a couple of days to get back to you with the info.
TOM,
T&D ELECTRONICS
tdeser@zoominternet.net
AnswerLekan,
I have been very busy over the last few weeks, however I did look over the service data and the most likely cause of the no sound problem would be a shorted or activated mute line. Each of the four or six outputs are preamped by an op amp for each channel. Each preamp has a mute input line that is feed by a commom connection from the mute circuit. I forgot to write down the location and part number for the mute capacitor. I can have the location Tuesday for you.
TOM,
T&D
