TroubleShooting & Some Information: On CD Radio & CD Changer, Bose Speaker Amplifier

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Many audio systems are equipped with an integral compact disc player. Partially insert a disc into the slot with the label side up. the  palyer will pull it in . if your radio is on and  the disc will not begin playing, if  a "ERR" appears on the display and the Disk comes back out, it could be a bad CD tray motor, Mechanism or bad Opt Sensor.          

Some Delco CD Changer & tape Player Errors:

  • E10 Tight tape Cause: A restricted cassette tape transport or broken cassette drive belt correction: Substitute a different cassette tape. If there still is an error code, send unit for repair at CorvetteRadios.Com.
  • E11 Broken tape Error Cause: Substitute a different cassette tape.
  • E12 Communication Error Cause: A vehicle/radio communication problem or an internal radio communication problem Correction, Disconnect the battery voltage to the radio,then reconnect after a few minutes.
  • E13  Tape communication Error Cause: The micro-processor is reading the speed pulses from the tape deck either too fast or too slow,Correction: Itthe tape player is still playing a cassette, try a new cassette, if there is still an error, send to service shop.
  • E14 Wrapped Tape Cause: The tape is wrapped around the capstan. This means a tape is wound up in the tape player. This error message, Other cause could be old or damaged when a CD adapter is being used. 

Some CD Errors

  • E20 Focus Error Cause: The CD player cannot focus on the disc or there is an internal focus problem, Correction: Try cleanig the disc or using a newer disc, Make sure the disc is loaded correcty. The road could be too rough or there is too much humidity. If the problem is not corrected, send unit to service at CorvetteRadios.Com.
  • E21 Tracking Error Cause: Correction try cleaning the disc or using a newer disc. Make sure the disc is loaded correcty. The road could be too rough or there is too much humidity, send for repair service (Tracking error can also be caused by blemishes on the disc)
  • E22 Motor Error:  The CD motor is not handling the compact disc properly, needs service.
  • E23 Communication Error: There is a vehicle/radio communication problem or an inter radio communication problem, Correction: Disconnect battery voltage to the radio and then reconnect  after a few minutes, If there still a problem, send to CorvetteRadios.Con repair center.

Some CD Changer Errors

  • E30 Focus Error: (Optics focus error may be due to moisture, upside down discm or empty cart)
  • E31 Tracking Error: Try cleaning the disc or using a newer disc. Make sure the disc is loaded correcty. ( Tracking error can be cause by blemishes on the dics)
  • E32 Load & Unload motor Problem: The CD motor is not handling the compact disc properly or defective magazine mounting screws are interfering with the mechanism. Correstion: Reload the magazine. If the problem continues, back out mounting screws, If the condition is corrected, replace the screws with shorter screws or add washers to the existing screws, problem still exists send to service center.
  • E33 CD Changer Communication Error: Ther is a vehicle/ radio communication problem or internal radio communication problem. Correction: Disconnect battery voltage to the radioand reconnect after a few minutes. If ther still a an error, determine if the problem is with the radio, the harness or the changer. Inspect for correct voltage at all connectors, still a problem, send to service center.
  • E34 CD Changer Door Open 
  • E35 Changer Cartridge Empty.

FM 10-Disc Changer Error

  • E01 Cause: This indicates a malfunction of the disc changer functions.
  • A: Press  the reset button on both the changer and the remote. The reset button on the changer is located on the front panel of the unit, It can beactivated with the tip of a pin.
  • B: If the unit does not operate after resetting it, remove the magazine by inserting a business card between the magazine and the mechanism. The lock lever will disengage to allow the magazine to eject. 
  • C: Make sure all CDs are in the magazine, a CD is found lodged in the carriage, remove all CDs from the magazine and reinsert the magazine into the changer.
  • D: Press the eject button. This should cause the loged CD to move from the carriage into the empty magazine. The magazine should automatically eject and normal operation will return.
  • E: If the changer fails to resume normal operation, send unit for repair.

Q&A from the customer

Q: My CD changer won't play and will not eject the CD carrier, then it show errors. What should I do now?
A: The most commom defective parts are Motors, Switches, Sensors, Capacitors, Springs, C.P.U.  I.C.  will cause that kind of error message. Please send it in for repair service.

Q: Had a factory CD player installed. My local auto electronics service says it is an Delco CD player. They said that it will play, but will not eject the discs. They couldn't fix it. Can you?
A: Besides the manufacturer, we're the one that can repair all Bose Delco CD Radio. We do have  technicians  with over 29 years of auto stereo repair experience and will solve your stereo problems.

Q: The CD stopped working, the tray won't open or close, and the cassette sounds bad. Can you fix it? What is the labor charge for it, and how much will it cost me?
A: Yes! We do repair Delco Cassette CD stereos, In fact we are very good with them! we can turn it out in 24 hours, the cost depends on the type of cd radio or player you have.

Q: I have a Bose stereo. The CD and display won't work right and is sometimes completely inoperable, The FM statics more then AM. How much does it cost to fix it?
A: The unit looks like it might have a bad or leakng capacitors in the power supply, The unit needs to be completely checked out,  to find all the problems and determine the cost of repair, The estimate is FREE! all you pay is the S&H

 Information on Bad Bose Speaker Amplifier

(Squealing & popping) This is a common problem on Bose amplifiers produced by from a date 1985-1996 in Corvette, Camaro, Buick, and Cadillac, also any other car manufacturers that used the Bose system.


All of the green capacitors on the amplifier board  were very low quality, and heat causes them to leak and go out faster. It is extremely hard to change the green capacitors if you don't have a electronic background or the equipment to replace these capactors,  you need to have a experience electronics shops to replace the small green capactors, they are temperature values rating changes, the values are 1uf, 4.7uf, 10uf, 47uf  Some cars with 2.2uf, 22uf this may change, depend on the type of  board you have.



CDM box or Bose amplifiers/ Speakers?


If you have snapping and popping from some of the speakers, the CDM box can be Bad also if  item was wet or water damage, to check for bad speakers. you can switch the right to left & left to right, if the problem changes, you have a bad speaker,  do the same with the speaker amplifier, only do this if you have bad sound on one side (front are rear)




The CDM Amplifier

When the head unit is turned on and off,  you should hear a click from the relay inside the CDM box can be found under the dash board and for Conv, in back of  the passenger seat,  water and corrosion can damage these unit CDM amplifier, check your windows

weather-stripping for leaks.



Did you know


1# If you hear a pop or static when you turn the stereo off, you may have a bad speaker relay.


2# If you have one bad speaker amplifier, you should have the two replace or repaired at the same time, the output from the amplifier decreases with the age of the amplifier.


3# When a  speaker amplifier goes bad,  it can blow your speakers or cause a fire in the car,  because a high dc voltage goes out to the speaker, that will cause the coil in the speaker to get hot and then it will do a burn out.


Hope this helps, Thank You









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