HT-CT180 - Sony Audio Service Manual (repair manual). Page 3

 .............................................  

3

2-1. Disassembly 

Flow 

...........................................................   6

2-2.  Rear Cabinet Block .........................................................   7
2-3.  AC Cord (AC1) ...............................................................   8
2-4.  MAIN Board Block ........................................................   9
2-5. MAIN 

Board 

...................................................................  10

2-6. NFC 

Module 

...................................................................  11

2-7. LED 

Board 

......................................................................  11

2-8. Antenna 

(ANT1) 

.............................................................  12

2-9.  Loudspeaker (SP1, SP3) (L-ch) ......................................   13
2-10.  BT NFC Board ................................................................   14
2-11.  Loudspeaker (SP2, SP4) (R-ch) ......................................   15

 ............................................................   16

4-1. Block 

Diagram 

................................................................  17

4-2.  Printed Wiring Board - MAIN Board - ...........................   19
4-3.  Schematic Diagram - MAIN Board (1/6) - .....................   20
4-4.  Schematic Diagram - MAIN Board (2/6) - .....................   21
4-5.  Schematic Diagram - MAIN Board (3/6) - .....................   22
4-6.  Schematic Diagram - MAIN Board (4/6) - .....................   23
4-7.  Schematic Diagram - MAIN Board (5/6) - .....................   24
4-8.  Schematic Diagram - MAIN Board (6/6) - .....................   25
4-9.  Printed Wiring Board - KEY Board -..............................   25
4-10.  Schematic Diagram - KEY Board - ................................   25
4-11.  Schematic Diagram - BT NFC Board - ...........................   26
4-12.  Printed Wiring Board - BT NFC Board - ........................   27
4-13.  Printed Wiring Board - LED Board - ..............................   27
4-14.  Schematic Diagram - LED Board - .................................   27

5-1.  Rear Cabinet Section ......................................................   32
5-2.  Front Cabinet Section .....................................................   33

 .......................................................   34

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution:  Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if 

the heated tip is applied for too long, so be careful!

• Strong 

viscosity

 

Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

• 

Usable with ordinary solder

 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.

ADVANCE  PREPARATION  WHEN  CONFIRMING  OP-
ERATION
All of the units included in the HT-CT180 (SA-CT180/SA-
WCT180/Remote control) are required to confi rming operation of 
SA-CT180. Check in advance that you have all of the units.

DESTINATION  ABBREVIATIONS
The following abbreviations for model destinations are used in this 
service manual.

• Abbreviations
 AR  : 

Argentina 

model

 AUS : 

Australian 

model

  CH 

: Chinese model

  CND  : Canadian model
  E12 

: Indian model

  LA 

: Latin American model (Except Argentina)

  SP 

: Singapore model

 TH  : 

Thai 

model