CD Changer - Skips/Will Not Play/Err Is Displayed

AUDIO
AU92-002
DECEMBER 4, 1992
SC 300/400

The SC 300/400 CD CHANGER SKIPS (REVISED)

The SC 300/400 CD Changers have been modified to improve the following conditions:

1) CD skips
2) CD won't play and "Err" is displayed

PRODUCTION EFFECTIVE:





From VIN: P/D:
JT8UZ30C*P0024704 9/92
JT8JZ31C*P0010071

EXCHANGE UNIT INFORMATION:

Panasonic began shipping countermeasured exchange units starting 10/22/92.

[Important!] When exchanging Panasonic CD changer, send the CD magazine (with the customers compact discs removed) along with the CD changer. Note, only exchange CD changers for SC 300/400 will be sent with the CD magazine.





Countermeasured CD changers will have a Blue Mark next to the caution label inside the CD changer and next to the serial number on the ID label.





Countermeasured CD magazines obtained through the exchange program will have a Blue Mark on the CD magazine near the CD eject levers:

PRODUCTION CHANGE DESCRIPTION:

Panasonic has implemented the following countermeasures for CD skipping conditions:

12/91 Optical lens were changed to reduce deformation with temperature. Lens deformation reduces the CD changers ability to focus on the CD.

12/91 Spring tension of the loading guide pins was increased to reduce contact with a playing CD. Contact with the CD reduces the CD changer's ability to spin the CD at the required speed.





9/92 Changes to the coating of the CD magazine clips, insert/eject roller shape and an addition of a brush to clean the lower roller were made to reduce the occurrence of small, clear pieces of protective coating contaminating the playing surface (shinny side) of the CD. These pieces which scrape off the edge of the CD, can cause the CD Changer to skip or not play.

The small pieces of protective surface coating have the appearance of scratches and consist of small transparent flakes that adhere to the disc surface. When these flakes are present, the CD changer cannot properly track which results in skipping or won't play conditions. It is important to know that these flakes do not damage the disc. Proper cleaning of the disc will restore the disc to its original condition.

DIAGNOSTIC PROCEDURE:

1) Verify the customers complaint.
2) Verify that the problem is not caused by the following:
* Rough road surfaces causing the CD to skip.
* Objects in the trunk bumping the CD changer (usually on left turns).
* Damaged or dirty CD discs (scratches, oil, fingerprints).

CD CLEANING PROCEDURE:





1) Clean the CD playing surface (shinny side) the CD radially (from the center to the outer edge) with a soft clean cloth. Do not wipe in a circular motion. Make sure that all contaminates have been removed from the playing surface.
2) If there are shavings on the edge of the CD, rub the edge of the CD with the side of a pencil until the shavings are removed.