JVC KW-XC888 Service Manual page 39

4.1.4 Information for using a car audio service jig
(1) We're advancing efforts to make our extension cords common for all car audio products.
Please use this type of extension cord as follows.
(2) As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly
after disassembly.
(3) Extension cord
: EXTSH002-22P ( 22 pin extension cord ) For connection between the mechanism assembly and main board.
: EXTXC004-20P ( 20 pin extension cord ) For connection between the front panel assembly and main board.
: EXTXC004-16P ( 16 pin extension cord ) For connection between the front panel assembly and main board.
: EXTXC004-16P ( 16 pin extension cord ) For connection between the front panel assembly and cassette mechanism assembly.
(4) Check for mechanism driving section such as motor ,etc.
4.1.5 Disassembly method
(1) Remove the front panel assembly.
(2) Remove the heat sink.
(3) Remove the rear bracket.
(4) Remove the bottom chassis assembly and middle chassis assembly.
(5) Remove the main board.
(6) Remove the CD mechanism assembly.
(7) Reattach the heat sink with two screws to the main board. (Refer to Disassembly method.)
(8) Connect the main board, front panel assembly, bottom chassis assembly and CD mechanism assembly with the extension cords
CAUTION:
Be sure to attach a heat sink on the power amplifier IC of a main board when supplying the power.
If voltage is applied without attaching the heat sink, the power amplifier IC will be destroyed by heat.
Front panel assembly
EXTXC004-16P
Bottom chassis assembly
EXTXC004-20P
EXTXC004-16P
*The box etc. is used as a stand.
Cassette mechanism assembly
CD mechanism assembly
EXTSH002-22P
Main board
Heat sink
(No.MA081)1-39