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  .............................................   3

  ..................................................................   4

3-1. Disassembly 

Flow 

...........................................................   5

3-2.  Top Panel Block ..............................................................   6
3-3.  HP Board, Front Panel Block ..........................................   7
3-4.  Speaker (6.5 cm) (SP101: L-CH/SP201: R-CH) ............   7
3-5.  S-AIR RX-IF Board, KEY Board, MAIN Board............   8
3-6.  REG Board, Power Transformer (PT901), 
 Power 

Cord 

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

9

3-7.  AMP Board, LCD Board ................................................   9

TEST  MODE 

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

ELECTRICAL  CHECK 

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

6-1. Printed 

Wiring 

Board 

 

- S-AIR RX-IF Board (Suffi x-11) -.................................   12

6-2. Printed 

Wiring 

Board 

 

- S-AIR RX-IF Board (Suffi x-12) - ................................   12

6-3.  Schematic Diagram - S-AIR RX-IF Board - ..................   13
6-4.  Printed Wiring Boards - AMP Section -..........................   14
6-5.  Schematic Diagram - AMP Section - ..............................   15
6-6.  Printed Wiring Boards - PANEL Section - .....................   16
6-7.  Schematic Diagram - PANEL Section - ..........................   17
6-8.  Printed Wiring Board - MAIN Board - ...........................   18
6-9.  Printed Wiring Boards - POWER SUPPLY Section - ....   19
6-10.  Schematic Diagram - MAIN Section - ...........................   20

7-1. Overall 

Section 

...............................................................  24

7-2.  Top Panel Section ...........................................................   25
7-3.  Front Panel Section .........................................................   26
7-4.  Rear Panel Section ..........................................................   27

  ..............................   28

0 OR  DOTTED  LINE  

0 ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  

0 SUR  

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)

Note: Refer to SUPPLEMENT-1 for the AMP, MAIN and POWER 

boards of printed wiring boards, schematic diagrams and 
electrical parts list of AEP, Russian and UK models. 

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.

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-SA10).

DIRECTION  OF  EZW-RT10  INSTALLATION
When EZW-RT10 is install with the S-AIR RX-IF board detached 
of the set, the label of EZW-RT10 is the under and install.

US and Canadian models

3-282-945-0[]

AEP and UK models

4-107-243-0[]

Russian model

4-107-244-0[]

S-AIR  RX-IF  BOARD  DISCRIMINATION
In this set, the S-AIR RX-IF board has been changed in the mid-
way of production. Repair after distinguishing each type set to do-
ing the repair referring to the following.

This section is extracted 
from instruction manual.

Turn on the unit.

Press .

Select the clock set mode.

Press CLOCK/TIMER MENU 

. If the current

mode appears on the display, press

/

repeatedly to select “CLOCK,” and then press

CLOCK/TIMER ENTER 

.

Set the time.

Press 

/

repeatedly to set the hour, and 

then press CLOCK/TIMER ENTER 

. Use the 

same procedure to set the minute.
The clock settings are lost when you disconnect the
power cord or if a power failure occurs.

You can use the S-AIR function to listen to the sound of
an S-AIR main unit in a remote location.

Perform the procedure described in “Preparing the 
unit” and check that the S-AIR indicator 

 is lit.

Press S-AIR CH 

 repeatedly to select the desired 

function of the S-AIR main unit.

Wireless strength

The functions that can be selected depend on the 
S-AIR main unit. For details, refer to the Operating
Instructions supplied with the S-AIR main unit.

Press VOLUME +/

 to adjust the volume.

You can perform the following operations using the 
buttons on the unit.

To
Start playback of a CD/DVD,
etc.
Stop playback of a CD/DVD,
etc.
Pause playback of a CD/DVD,
etc.

/

Select a track, file or chapter
of a CD/DVD, etc.

PRESET +/ 

Select a preset station when 
listening to the radio.

Depending on the connected S-AIR main unit,
the operation may differ. Refer to the Operating
Instructions of the S-AIR main unit.

Connect headphones (not supplied) to the 
(headphone) jack located on the rear of the unit.

The elapsed playing time or remaining playing time of the 
CD/DVD, etc. being played on the S-AIR main unit may not
be displayed on this unit. In this case, “

.

” appears.

Tip
You can listen to the sound even when the connected S-AIR 
main unit is in standby mode. For details, refer to the Operating
Instructions supplied with the S-AIR main unit.

Press DISPLAY

. Each time you press the button, the 

display changes as follows:

Information of the connected S-AIR main unit

1)

Model name of the connected S-AIR main unit

2)

Clock

2)3)

 ...

“S-AIR”

 “UNLINKED”

2)

 Clock

2)3)

 ...

You can turn off the clock display to minimize the 
amount of power consumed when the unit is off (Power
Saving Mode).
Press DISPLAY

. Each time you press the button, the 

display changes as follows:
No display (Power Saving Mode)

 Clock

3)

 ...

1)

The displayed information depends on the connected S-AIR main 
unit.

2)

Displayed for about 8 seconds.

3)

Displayed only when the clock is set.

Note
The STANDBY indicator

 lights up when the unit is off.

The unit offers two timer functions. If you use the 
Play Timer with the Sleep Timer, the Sleep Timer has
priority.

You can fall asleep to music. This function works even if 
the clock is not set.
Press SLEEP 

repeatedly.

Note
Even if you set the timer, no sound is output from the unit if 
playback on the connected S-AIR main unit ends within the set time
period or if communication with the S-AIR main unit is cut off.

You can wake up to the sound of the connected S-AIR 
main unit at a preset time.
Make sure you have set the clock.

Prepare the sound source on the S-AIR main unit.

For details, refer to the Operating Instructions
supplied with the S-AIR main unit.
Press VOLUME +/

 to adjust the volume.

Press CLOCK/TIMER MENU 

.

Press

/

 repeatedly to select “PLAY SET,” 

then press CLOCK/TIMER ENTER 

.

“ON TIME” appears, and the hour indication flashes.

Set the time to start playing.

Press 

/

repeatedly to set the hour, and 

then press CLOCK/TIMER ENTER 

.

The minute indication flashes. Use the procedure
above to set the minute.

Use the same procedure as in step 4 to set the time 
to stop playing.

Press

/

 repeatedly to select the desired 

option.

AUTO:
Sound from the connected S-AIR main unit is
output. However, an alarm sounds in the following
cases.

When communication with the S-AIR main unit
is cut off.
When no sound is output from the S-AIR main 
unit or the audio signal level is too low.
When the S-AIR main unit is not ready for
playback at the set start time. Note that the alarm 
continues to sound even if the S-AIR main unit
becomes ready after the start time has passed.

ALARM:
An alarm is output.
S-AIR:
Sound from the connected S-AIR main unit is
output. However, sound from the S-AIR main unit
is not output in the following cases. An alarm does 
not sound.

When communication with the S-AIR main unit
is cut off.
When no sound is output from the S-AIR main 
unit or the audio signal level is too low.
When the S-AIR main unit is not ready for
playback at the set start time. Note that sound
from the S-AIR main unit is output once the S-
AIR main unit is ready for playback even after the 
start time has passed.

Press CLOCK/TIMER ENTER 

.

The display shows the timer settings.

Press

 (on/standby) 

 to turn off the unit.

The unit turns on about 40 seconds before the preset
time.
If the unit is on at the preset time, the Play Timer will
not play.

Press any button.

Press CLOCK/TIMER MENU 

.

“SELECT” flashes in the display.

Press CLOCK/TIMER ENTER 

.

Press

/

 repeatedly to select “PLAY SEL.”

Press CLOCK/TIMER ENTER 

.

Press CLOCK/TIMER MENU 

.

“SELECT” flashes in the display.

Press CLOCK/TIMER ENTER 

.

Press

/

 repeatedly to select “OFF.”

Press CLOCK/TIMER ENTER 

.

Start over from step 1.

Tip
The Play Timer setting remains as long as the setting is not canceled
manually.

• 

This set can be disassembled in the order shown below.