Hi and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, what seems to be wrong with the Pioneer CT-W103? ...what symptoms are exhibited?
Only an electronic copy of the repair / Service Manual (not the User nor the Owner's Manual).
Would a LINK to where it can be downloaded from serve your need please ?
The described symptom would almost always point to a belt issue.
The Service Manual includes an exploded parts diagram detailing belt location and a parts list.
Please click HERE.
The manual is in a Portable Document Format (PDF) file and can be viewed in most web browser. Click on the link to open the file or right click then select “Save As…” to download the file. It would require Adobe Acrobat Reader or equivalent for this purpose.
Please see the page before the last of the Service Manual as it describes the front panel features and the functions of the buttons and controls.
Click HERE to find an authorized Pioneer Service Center.
Key in location/information and click on the FIND IT button.