AIR-SA15TI, AIR-SA20PK - Sony Audio Service Manual (repair manual)

Model
AIR-SA15TI AIR-SA20PK
Pages
34
Size
2.07 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
air-sa15ti-air-sa20pk.pdf
Date

View Sony AIR-SA15TI / AIR-SA20PK Service Manual online

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
AIR-SA15Ti
SPECIFICATIONS
WIRELESS AUDIO TRANSMITTER
9-889-249-02
2008K05-1
© 
2008.11
US Model
Canadian Model
AEP Model
UK Model
Ver. 1.1  2008.11
•  “S-AIR” and its logo are trademarks of Sony Corporation.
•  iPod is a trademark of Apple Inc., registered in the U.S. and othercountries.
•  The Bluetooth word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such marks by Sony Corporation 
is under license. Other trademarks and trade names are those of their respective owners.
•  All other trademarks and registered trademarks are of their respective holders. In this manual, ™ and 
®
 marks are not 
specifi ed.
Output
AUDIO OUT:
voltage 775 mV, impedance
47 kilohms
VIDEO OUT:
Max. output level 1 Vp-p, unbalanced,
Sync. negative, load impedance
75 ohms (Composite Video Out)
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section:
Tuning range:
87.5 − 108.0 MHz (100 kHz step)
US, Canadian models: 
87.5 − 108.0 MHz (50 kHz step)
AEP, UK models: 
Antenna:
FM lead antenna
Antenna terminals:
75 ohms unbalanced
Intermediate frequency:
10.7 MHz
AM tuner section:
Tuning range:
530 − 1,710 kHz (with 10 kHz tuning
US, Canadian models: 
531 − 1,602 kHz (9 kHz step)
AEP, UK models: 
interval)
531 − 1,710 kHz (with 9 kHz tuning
interval)
Antenna:
AM loop antenna, external antenna
terminal
Intermediate frequency:
450 kHz
General
Power requirements:
120 V AC, 60 Hz (US, Canadian)
230 V AC, 50/60 Hz (AEP, UK)
Power consumption:
15 watts
Dimensions (w/h/d) (excluding the AC
power supply unit):
Approx. 295 × 43 × 110 mm
Mass (including the AC power supply unit):
Approx. 1.1 kg
Design and specifications are subject to 
change without notice.
•  AIR-SA15Ti is the output and tuner section in AIR-SA20PK.
AIR-SA15Ti
2
1. 
SERVICING  NOTES
  .............................................   3
2. GENERAL
  ..................................................................   4
3. DISASSEMBLY
3-1.   Disassembly Flow ...........................................................   5
3-2.   Tuner (FM/AM), Panel Top Block..................................   5
3-3.   TX-IF Board, Holder (SAIR) ..........................................   6
3-3.   MAIN Board ...................................................................   6
4. 
TEST  MODE 
 ............................................................  
7
5. 
ELECTRICAL  CHECK 
 .........................................  
9
6. DIAGRAMS
6-1.  Block Diagram  ...............................................................   11
6-2.  Schematic Diagram - MAIN Board (1/3) - .....................   13
6-3.  Schematic Diagram - MAIN Board (2/3) - .....................   14
6-4.  Schematic Diagram - MAIN Board (3/3) - .....................   15
6-5.  Printed Wiring Boards - MAIN/
 
WIRELESS TRANSCEIVER Section (Suffi x-11) - ......   16
6-6.  Printed Wiring Board - MAIN/
 
WIRELESS TRANSCEIVER Section (Suffi x-12) - ......   17
6-7.  Schematic Diagram - TX-IF Board - ..............................   18
6-8.  Schematic Diagram - LED Section - ..............................   19
6-9.  Schematic Diagram - POWER Board - ..........................   20
6-10. Printed Wiring Boards 
 
- LED/POWER SUPPLY Section (Suffi x-11) - ..............   21
6-11. Printed Wiring Boards 
 
- LED/POWER SUPPLY Section (Suffi x-12) - ..............   22
7. 
EXPLODED  VIEWS
7-1. Overall 
Section 
 
..............................................................  25
7-2.  Top Panel Section ...........................................................   26
7-3. Bottom 
Panel 
Section 
......................................................  27
8. 
ELECTRICAL  PARTS  LIST
  ..............................   28
Note: Refer to the printed wiring boards of suffi x-12 for AEP and 
UK models.
TABLE  OF  CONTENTS
NOTES  ON  CHIP  COMPONENT  REPLACEMENT
• 
Never reuse a disconnected chip component.
• 
Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, 
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and 
from all exposed metal parts to any exposed metal part having a 
return to chassis, must not exceed 0.5 mA (500 microamperes.). 
Leakage current can be measured by any one of three methods.
1.  A commercial leakage tester, such as the Simpson 229 or RCA 
WT-540A. Follow the manufacturers’ instructions to use these 
instruments.
2.  A battery-operated AC milliammeter. The Data Precision 245 
digital multimeter is suitable for this job.
3.  Measuring the voltage drop across a resistor by means of a 
VOM or battery-operated AC voltmeter. The “limit” indication 
is 0.75 V, so analog meters must have an accurate low-voltage 
scale. The Simpson 250 and Sanwa SH-63Trd are examples 
of a passive VOM that is suitable. Nearly all battery operated 
digital multimeters that have a 2 V AC range are suitable. (See 
Fig. A)
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
SAFETY-RELATED  COMPONET  WARNING!
COMPONENTS  IDENTIFIED  BY  MARK  
0  OR  DOTTED  LINE  
WITH  MARK  
0  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS 
 
WHOSE  PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  
MANUAL  OR  IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT  
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0  SUR  
LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE  DES  
PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ  DE  FONC-
TIONNEMENT.  NE  REMPLACER  CES  COMPOSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
Ver. 1.1
AIR-SA15Ti
3
SECTION  1
SERVICING  NOTES
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)
 : LEAD  FREE  MARK
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.
NOTE  THE  S-AIR  COMMUNICATION  CONFIRMING
EZW-RT10 of the attachment is necessary for the confi rmation of 
S-AIR communication.
Confi rm S-AIR after inserting EZW-RT10 in the set (AIR-SA15Ti).
DIRECTION  OF  EZW-RT10  INSTALLATION
When EZW-RT10 is install with theTX-IF board detached of the 
set, the label of EZW-RT10 is the under and install.
label
EZW-RT10
TX-IF board
Compatible iPod models
You can use the following iPod models on the main unit. Update your iPod with the
latest software before using it. 
iPod touch 2nd
generation
iPod nano 4th
generation (video)
iPod touch 1st
generation
iPod nano 3rd
generation (video)
iPod classic
iPod nano 2nd
generation
(aluminum)
iPod 5th generation
(video)
iPod nano 1st
generation
iPod 4th generation
(color display)
iPod 4th generation
iPod mini
(AEP and UK models)
Model
Part No.
Canadian model
4-116-230-0[]
US model
4-120-510-0[]
AEP and UK models
4-128-875-0[]
MODEL  IDENTIFICATION
–Bottom View –
PART No.
Ver. 1.1
DISCRIMINATION
In this set, the all boards have been changed in the midway of 
production. Repair after distinguishing each type set to doing the 
repair referring to the following.
US and Canadian models have suffi x-11/-12.
AEP and UK models have only suffi x-12.
– LED Board (Component Side) –
– POWER Board (Component Side) –
– MAIN Board (Component Side) –
– TX-IF Board
(Component Side) –
– LED-L Board
(Component Side) –
– LED-R Board
(Component Side) –
Former :  1-878-098-11
New : 
1-878-098-12
Former :  1-878-101-11
New : 
1-878-101-12
Former :  1-878-102-11
New   : 1-878-102-12
Former :  1-878-100-11
New : 
1-878-100-12
Former :  1-878-103-11
New : 
1-878-103-12
Former :  1-878-099-11
New : 
1-878-099-12
AIR-SA15Ti
4
SECTION  2
GENERAL
This section is extracted 
from instruction manual.
Guide to parts and controls
Main unit (AIR-SA15Ti/Wireless Audio Transmitter)
Front panel
Rear panel
Remote for the main unit 
(RM-ANU045)
ILLUMINATION
Press to change the illumination
brightness.
BAND
Press to select FM or AM reception
mode.
SYSTEM MENU
Press to enter the system menu.
POWER indicator
Lights up when the main unit is turned
on.
iPod connector
Place an iPod on the connector to listen
to audio contents stored in the iPod.
You need to connect the supplied iPod
For details on the supplied iPod Dock
Adapters, refer to the instructions
supplied with the iPod Dock Adapters.
S-AIR indicator
Lights up when the main unit is turned
on with the supplied wireless transceiver
inserted.
Unit: TUNING/SELECT +/–
Press to tune in the desired station.
Press to select a menu item.
Remote: TUNING +/–
Press to tune in the desired station.
ENTER
Press to enter the settings.
Illumination
You can change the brightness using
ILLUMINATION
.
R
Display
RB
Remote sensor
RT
ANTENNA jacks
Connect the supplied FM lead antenna
and AM loop antenna.
RE
POWER switch
Switch for turning the main unit on or
RG
iPod AUDIO OUT L/R jacks
iPod VIDEO OUT jack
Connect an optional AV system, such as
a TV, etc.
RH
S-AIR ID selector
Select the S-AIR ID to connect with the
sub units.
RI
PAIRING button
Press to perform pairing.
RK
EZW-RT10 slot
Insert the supplied wireless transceiver.
RL
Buttons for controlling an iPod
 (play/pause)
Press to start or pause playback.
/
Press to skip to the previous/next track.
MENU
Press to return to the previous menu.
Works much  like the Menu button on
the iPod.
/
Press to select a menu item or track for
playback.
ENTER
Press to execute the selected item or play
the selected track.
RM
PARTY CH
Press to select the sound source when the
S-AIR mode is set to “PARTY.”
X
S-AIR MODE
Press to select the S-AIR mode.
XB
Battery compartment lid
XT
PRESET +/–
Press to select a preset station.
XE
DISPLAY
Press to view the information on the
display.
Display
S-AIR mode indicator
PAIRING indicator
Text information
Tuner reception mode
Tuner reception
AIR-SA15Ti
5
SECTION  3
DISASSEMBLY
• 
This set can be disassembled in the order shown below.
3-1.  DISASSEMBLY  FLOW
Note: Follow the disassembly procedure in the numerical order given.
3-2.  TUNER (FM/AM),  PANEL  TOP  BLOCK
SET
3-4. MAIN BOARD
 (Page 
6)
3-3. TX-IF BOARD,
 HOLDER 
(SAIR)
 (Page 
6)
3-2. TUNER 
(FM/AM),
 
PANEL TOP BLOCK
 (Page 
5)
 four screws 
 (BVTP3 
×
 8)
 two screws 
 (B2.6)
 flexible flat cable (9 core)
 (CN002)
RB flexible flat cable (9 core) 
 (US, 
Canadian), 
 
flexible flat cable (11 core)
 (AEP, 
UK)
 unweaved cloth
R unweaved cloth
 five screws 
 (BVTP2.6 
(3CR))
 two screws 
 (BVTP3 
×
 8)
RT tuner 
 (FM/AM)
RE panel top block
 connector 
 (CN001)
Ver. 1.1
AIR-SA15Ti
6
3-3.  TX-IF  BOARD,  HOLDER (SAIR)
Note: This illustration sees the panel top block from TX-IF board side.
3-4.  MAIN  BOARD
Note: This illustration sees the panel top block from MAIN board side.
 connector 
 (CN603)
 holder (SAIR)
 TX-IF board
 cushion (remote PWB)
 two screws
 (BVTP2.6 
(3CR))
 two screws
 (BVTP2.6 
(3CR))
panel top block
 MAIN board
 flexible flat cable (9 core)
 (CN402)
 escutcheon
panel top block
 sheet (FL)
 sheet (HS)
 flexible flat cable (9 core)
 (W002)
 six screws
 (BVTP2.6 
(3CR))
 Remove the solders.
AIR-SA15Ti
7
SECTION  4
TEST  MODE
1.  PANEL  TEST 
Procedure:
1.  The [POWER] switch is set [ON] to turn the main power on.
2.  While pressing the [BAND] and [SYSTEM MENU] buttons, 
press the [PAIRING] button.
3.  Then all segments of fl uorescent indicator tube are turned on 
and all LEDs are lighted.
4.  Press the [SYSTEM MENU] button, the model name is dis-
played on the fl uorescent indicator tube.
5.  Each time [SYSTEM MENU] button is pressed, the display 
changes starting from model name, destination, MC, SYS, UI, 
ST and AR version this order, and returns to the model name 
display.
6.  Press the [ILLUMINATION] button, the version is displayed 
changes to last updated date displayed.
7.  Press the [BAND] button, the messages “K 0” is displayed on 
the fl uorescent indicator tube. All buttons are pressed, display 
becomes “K 5”. (Buttons other than [ENTER] and [PAIRING])
8.  To release from this mode, while pressing the [BAND] and 
[SYSTEM MENU] buttons, press the [PAIRING] button.
2.  FACTORY  PRESET
Procedure:
1.  The [POWER] switch is set [ON] to turn the main power on.
2.  While pressing the [BAND] and [TUNING/SELECT –] but-
tons, press the [PAIRING] button.
3.  The messages “FACTORY” appears and initialization is per-
formed, and the messages “FM 87.50” appears.
3.  S-AIR  TEST
3-1.  S-AIR test mode
Setting method:
1.  The [POWER] switch is set [ON] to turn the main power on.
2.  While pressing the [BAND] and [TUNING/SELECT +] but-
tons, press the [PAIRING] button.
3.  Entered the S-AIR test mode.
4.  It returns to the S-AIR test mode each item when [SYSTEM 
MENU] button is pressed after it enters each item.
5.  To release from this mode, while pressing the [BAND] and 
[TUNING/SELECT +] buttons, press the [PAIRING] button.
3-1-1.  I2C connection check
This mode is confi rm the I2C line between IC401 on the MAIN 
board and EZW-RT10.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “I2C”.
3.  Press the [ENTER] button, the messages “OK” or “NG” is dis-
played on the fl uorescent indicator tube. When the I2C line 
between IC401 on the MAIN board and EZW-RT10 is normal, 
“OK” is displayed. When abnormality is found, “NG” is dis-
played.
4.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-2. Quality check
This mode is radio wave sensitivity state confi rmation of EZW-
RT10.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “QUALITY”.
3.  Press the [ENTER] button, the messages “*** ###” is dis-
played on the fl uorescent indicator tube.
 
***: Minimum value (%)
 
###: Mean value (%)
4.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-3. Power setting
This mode is setting of radio wave output of EZW-RT10.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “POWER”.
3.  Press the [ENTER] button the messages “039 SET” is dis-
played on the fl uorescent indicator tube.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the radio wave output. (OFF or 000 to 063)
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-4.  RF CH check
This mode is RF CH used is confi rmed.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “CHK RFCH”.
3.  Press the [ENTER] button the messages “*** CH#” is dis-
played on the fl uorescent indicator tube.
 
***: ON or OFF
 
#: CH number used
4.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-5.  ENC key change
This mode is setting of code key on/off change of EZW-RT10.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “ENC KEY”.
3.  Press the [ENTER] button the messages “ON” or “OFF” is 
displayed on the fl uorescent indicator tube.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the “ON” or “OFF”.
5.  Press the [ENTER] button, return to S-AIR test mode menu.
3-1-6. Version check
This mode is S-AIR version of the set connected with AIR-SA15Ti 
is confi rmed.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “VER CHECK”.
3.  Press the [ENTER] button, S-AIR version of the set connected 
with AIR-SA15Ti is displayed on the fl uorescent indicator.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons, change the version and date displayed.
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
AIR-SA15Ti
8
3-1-7.  DARR setting check
This mode is setting of EZW-RT10 is confi rmed.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “DARR”.
3.  Press the [ENTER] button, main unit connect code is displayed 
on the fl uorescent indicator.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons, change sub unit connection number, sub unit connect 
code and sub unit address this order, and returns to the main 
unit connect code display.
 
CO ****: main unit connect code
 
MUCNT **: sub unit connectoin number
 
MUCO****: sub unit connect code
 
MUADR **: sub unit address
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-8.  Channel mapping change (MODE)
This mode is channel of the main unit is change for the reception 
confi rmation of the sub unit.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “CH MODE”.
3.  Press the [ENTER] button, the messages “SURROUND” or 
“MULTI” is displayed on the fl uorescent indicator tube.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the “SURROUND” or “MULTI”.
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-9.  Channel mapping change (CH1 to CH4)
This mode is channel of the main unit is change for the reception 
confi rmation of the sub unit.  
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “CH 1” (or “CH 2”, “CH 3”, “CH 4”).
3.  Press the [ENTER] button, channel menu displayed.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select channel mapping.
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-10.  Channel pipe setting
This mode is channel pipe is setting.
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “CH 1 PIPE” (or “CH 2 PIPE”, “CH 3 PIPE”, 
“CH 4 PIPE”).
3.  Press the [ENTER] button, the messages “CH* - CH#” is dis-
played on the fl uorescent indicator tube.
 
*: channel number of selected step 2
 
#: number of channel pipe
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select channel pipe setting.
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
3-1-11.   NAMG  setting
This mode is change of NAMG setting. 
Procedure:
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “NAMG”.
3.  Press the [ENTER] button the messages “*** SET” is dis-
played on the fl uorescent indicator tube.
 
***: 107 to 117
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the NAMG setting value.
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
 
(This mode setting value is buck up even if it turns off power)
3-1-12. DEMO 
setting
This mode is radio wave does setting change to improve connec-
tion by batch processing in shop etc. when connection does not go 
well badly.
Procedure: 
1.  Enter the S-AIR test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “DEMO”.
3.  Press the [ENTER] button the messages “ON” or “OFF” is 
displayed on the fl uorescent indicator tube.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the “ON” or “OFF”.
 
ON: batch processing on
 
OFF: batch processing off (default)
5.  Press the [ENTER] button, return to S-AIR test mode each 
item.
4.  S-AIR  RADIO  REGULATION  LOW  TEST (ETSI/FCC)
4-1.  S-AIR radio regulation low test mode
Setting method:
1.  The [POWER] switch is set [ON] to turn the main power on.
2.  While pressing the [BAND] and [ENTER] buttons, press the 
[PAIRING] button.
3.  Entered the S-AIR radio legulation low test mode.
4.  It returns to the S-AIR radio legulation low test mode each 
item when [SYSTEM MENU] button is pressed after it enters 
each item.
5.  To release from this mode, while pressing the [BAND] and 
[ENTER] buttons, press the [PAIRING] button.
4-1-1.  RF channel setting
This mode is setting of RF channel.
Procedure:
1.  Enter the S-AIR radio legulation low test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “RF CH”.
3.  Press the [ENTER] button the messages “LOW” is displayed 
on the fl uorescent indicator tube.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the “LOW”, “MID” or “HIGH”.
5.  Press the [ENTER] button, return to S-AIR radio legulation 
low test mode each item.
AIR-SA15Ti
9
4-1-2. Tx/Rx setting
This mode is setting of transmitter/receiver. 
Procedure: 
1.  Enter the S-AIR radio legulation low test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “TX RX”.
3.  Press the [ENTER] button the messages “TX” is displayed on 
the fl uorescent indicator tube.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the “TX” or “RX”.
5.  Press the [ENTER] button, return to S-AIR radio legulation 
low test mode each item.
4-1-3. Antenna setting
This mode is setting of antenna.
Procedure:
1.  Enter the S-AIR radio legulation low test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “ANTENNA”.
3.  Press the [ENTER] button the messages “T-* R-*” is displayed 
on the fl uorescent indicator tube.
 
*: 1 or 2
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the antenna setting.
5.  Press the [ENTER] button, return to S-AIR radio legulation 
low test mode each item.
4-1-4. Power setting
This mode setting the output level of RF.
Procedure:
1.  Enter the S-AIR radio legulation low test mode.
2.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select “ANTENNA”.
3.  Press the [ENTER] button the messages “039 SET” is dis-
played on the fl uorescent indicator tube.
4.  Press the [TUNING/SELECT +]/[TUNING/SELECT –] but-
tons to select the output level. (OFF or 000 to 063)
5.  Press the [ENTER] button, return to S-AIR radio legulation 
low test mode each item.
SECTION  5
ELECTRICAL  CHECK
FM  TUNE  LEVEL  CHECK
signal
generator
set
Procedure:
1.  Turn on the set.
2.  Input the following signal from signal generator to FM antenna 
input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation 
: 75 kHz
Modulation 
: 1 kHz
ANT input 
: 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set. 
You cannot use video cable for checking.
 
Use signal generator whose output impedance is 75 ohm.
3.  Set to FM tuner function and tune A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C sig-
nals.
When the selected station signal is received in good condition, 
“TUNED” is displayed.
AIR-SA15Ti
10
MEMO

Download Sony AIR-SA15TI / AIR-SA20PK Service Manual (Repair Manual)

Here you can view online and download Sony AIR-SA15TI / AIR-SA20PK Service Manual in PDF. AIR-SA15TI / AIR-SA20PK service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony AIR-SA15TI / AIR-SA20PK Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.