Sony CDX-C4900R - Change of Main, Sub (CD) and Key Boards; Discrimination

2
1. Change of Main, Sub (CD) and Key Boards
When performing service and inspection, check the part number of
the main, sub (CD) and key boards.
1-1. Discrimination
-MAIN BOARD (COMPONENT SIDE)-
Main board part No.
Former:1-677-055-11
New :1-677-055-12
-SUB(CD) BOARD (COMPONENT SIDE)-
Sub(CD) board part No.
Former:1-677-056-11
New :1-677-056-12
-KEY BOARD (COMPONENT SIDE)-
Key board part No.
Former:1-676-602-12
New :1-676-602-13