Sony SA-WNT3 Service Manual ▷ View online
SA-WNT3
9
2-5. FRONT PANEL SECTION
1
Insert a flat-head screwdriver in
two slits at bottom of the unit, and lift the
front panel section a little.
3
All bosses are removed while moving
jig in the direction of the arrow, and
front panel section is removed.
front panel section is removed.
3
All bosses are removed while moving
jig in the direction of the arrow, and
front panel section is removed.
front panel section is removed.
5
front panel section
Note 2: When installing the front panel section,
remove the used glue and use a new
glue to fix the front panel section.
4
CN7000 (3P)
– Bottom view –
2
Insert the jig into a space and raise
front panel section.
Note
1: When using a jig, please work so
as not to injure front panel section.
total eight bosses
2
Insert the jig into a space and raise
front panel section.
Note
1: When using a jig, please work so
as not to injure front panel section.
SA-WNT3
10
2-6. LOUDSPEAKER (16 cm)-081-11
– Front view –
2 Remove the loudspeaker
(16 cm)-081-11 in the
(16 cm)-081-11 in the
direction of the arrow.
1 six screws
((1) (4 x 20), +BV TAPPING)
3 terminal (black)
(narrow
(narrow
side)
3 terminal (red)
(wide
(wide
side)
4 loudspeaker (16 cm)-081-11
:ire VettinJ
top side
loudspeaker (16 cm)-081-11
red
(wide side)
(wide side)
black
(narrow side)
(narrow side)
top side
Note : When installing the loudspeaker (16 cm)-081-11,
make sure that there is a position of the speaker
terminal to the position shown in the figure below.
– Front view –
terminals position
SA-WNT3
SA-WNT3
11
11
SECTION 3
TROUBLESHOOTING
1. ON/STANDBY lamp LED fl ashes in red (PROTECT)
Note: When the volume level is “0”, power of amplifi er block is turned off, and amplifi er protect diagnosis is not performed.
Set the volume level than “1”.
2. ON/STANDBY lamp LED does not light up after AC in (Power is not turned on)
ON/STANDBY lamp LED flashes
in red.
(PROTECT)
in red.
(PROTECT)
ON/STANDBY lamp LED does not
flash in red, when removing the
speaker and turning the power on.
flash in red, when removing the
speaker and turning the power on.
Check if IC7203 pin 35, 39, 40 is
short to GND.
short to GND.
No
No
Yes
Check and replace the speaker.
Yes
Replace the IC7203 (6-721-742-01)
on the SUB MAIN board.
on the SUB MAIN board.
Yes
Replace SUB MAIN board.
ON/STANDBY lamp LED does not
light up.
(Power is not turned on)
light up.
(Power is not turned on)
The voltage of the following is 20 V
or 32 V.
SWITCHING REGULATOR
(3L405W): CN101 pin 8
or 32 V.
SWITCHING REGULATOR
(3L405W): CN101 pin 8
The voltage of the following is 3.3 V.
SUB MAIN board: IC7400 pin 1
SUB MAIN board: IC7400 pin 1
Yes
Vibrator (X7400) on the SUB MAIN
board is oscillated after AC input.
board is oscillated after AC input.
Yes
Yes
Replace SWITCHING
REGULATOR (3L405W).
REGULATOR (3L405W).
No
No
Replace the IC7100 on the SUB
MAIN board and confirm 3.3 V at
IC7400 pin 1.
MAIN board and confirm 3.3 V at
IC7400 pin 1.
No
Replace the vibrator (X7400) on the
SUB MAIN board and confirm
vibrator is oscillated.
SUB MAIN board and confirm
vibrator is oscillated.
Yes
Replace the IC7400 on the SUB
MAIN board.
MAIN board.
No
Replace SUB MAIN board.
No
Replace SUB MAIN board.
Ver. 1.2
SA-WNT3
SA-WNT3
12
12
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
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