Sony WH-XB900N Service Manual page 6

WH-XB900N
DISASSEMBLY PROHIBITION AND PARTS REPLACEMENT
THAT AFFECT THE NOISE CANCELING FUNCTION
The precise noise canceling function of this unit is adjusted in the
production process.
Therefore, it is not possible to disassemble the portion affecting the
adjustment of the noise canceling function or to replace the single
parts affecting it.
(It is not possible to adjust the noise canceling function)
Be sure to refer to the below before disassembling this unit.
• Disassembly Prohibition of Front Plate Portion
Do not disassemble the left and right front plate portion.
If disassembling the front plate portion, malfunction will occur in
adjustment of the noise canceling function.
Note: It is possible to remove the lead wire that sticking out from the front
plate portion from the L MAIN board or R SUB board, and to separate
the front plate portion and L MAIN board, or the front plate portion
and R SUB board.
– L-ch –
– Front view –
– R-ch –
– Front view –
6
– Rear view –
– Rear view –
• Parts Replacement
Since adjustment value of the noise canceling function is affected, it
is not possible for replacement of front plate portion, replacement of
L MAIN board only or replacement of electret cap microphone only.
When the left and right front plate portion, L MAIN board or electret
cap microphone is defective, replace with the SVX headphone assy
(EXPLODED VIEWS: Ref. No. HPN1) including them.
front plate portion (L-ch)
– Left housing inner view –
electret cap
L MAIN board
microphone
SVX headphone assy
(EXPLODED VIEWS: Ref. No. HPN1)
Sony CONFIDENTIAL
For Authorized Servicer
front plate portion (R-ch)
– Right housing inner view –
electret cap microphone
SYS SET