HT-CT180 - Sony Audio Service Manual (repair manual). Page 5

ABOUT  PARTS  REPAIR  OF  EACH  BOARDS
When each boards installed in this unit are defective, individual 
electrical parts that the mount is done cannot be replaced. When 
each boards are defective, replace the mounted board or the whole 
parts including an applicable board.
Printed wiring board and schematic diagram that have been de-
scribed on this service manual are for reference.
(Printed wiring board and schematic diagram of WIERLESS board 
have not described)

NOTE  OF  REPLACING  THE  BT  NFC  BOARD  OR  THE  
NFC  MODULE
When replacing the BT NFC board or the NFC module, be sure to 
replace both at the same time.
The BT NFC board or the NFC module cannot replace with single.

WHAT  TO  DO  IF  PROTECT
If all of the LEDs are lit, it is state in the protect. This state shows 
an abnormality of the AMP circuit.
In this case, there is a possibility that the MAIN board is defective. 
Please replace the MAIN board.

NOTE  OF  REPLACING  THE  WIRELESS  BOARD
When replaced the WIRELESS board, link of SA-CT180 and SA-
WCT180 will be disconnected.
Before you return repaired unit to customers, please link the SA-
CT180 and SA-WCT180 by the following procedure.
If, in a state in which only one of SA-CT180 or SA-WCT180 is 
brought into service fi eld, and replaced the WIRELESS board of 
SA-CT180 or SA-WCT180, when returning the repaired unit, be 
sure to inform the customers that it is necessary to link the follow-
ing procedure.

You can specify the wireless connection 
to link the Bar Speaker to the subwoofer 
using the Secure Link function. This 
function can help prevent interference if 
you use multiple wireless products or 
your neighbors use wireless products.

Press LINK on the rear of the 
subwoofer.
You will hear beeps from the 
subwoofer.

 

Speaker for 5 seconds, then VOL – 
for 5 seconds.
The OPTICAL and ANALOG 
indicators flash alternately.
When the Bar Speaker is linked to 
the subwoofer, the indicators stop 
flashing.
If it failed, the indicators light up for 
5 seconds. Try again the above 
operation.

If the system still does not operate 
properly, reset the system as follows:

While holding down the @/1 (on/ 
standby) button on the system, 
hold down the INPUT and VOL – 
buttons simultaneously for 5 
seconds.
All 5 indicators on the Bar Speaker 
flash 3 times, and the settings 
return to their initial status.