OK?..manual is complet and helpfull... for repairing such a old and rare boombox like JVC PCM it is necessary...
Text excerpt from page 48 (click to view)
CDX-R30M/R3310/R3410/R3410S
REVISION HISTORY
Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper on the revised page allows you to jump to the next revised page. Ver. 1.0 1.1 Date 2005. 01 2005. 07 Description of Revision New AEP and UK model addition in CDX-R30M.