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Model
TA-SA300WR
Pages
29
Size
2.37 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
ta-sa300wr.pdf
Date
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TA-SA300WR
TA-SA300WR
9
9
SECTION  3
TEST  MODE
COLD  RESET
Note: The main unit corresponding to TA-SA300WR, wireless transceiv-
ers (EZW-RT50 (except Chinese model) or EZW-RT20 (Chinese 
model)) (2 units) and the remote commander corresponding to the 
main unit are necessary to execute this mode.
Procedure:
1.  Insert the wireless transceiver (EZW-RT50 (except Chinese 
model) or EZW-RT20 (Chinese model)) into the main unit.
 
EZW-RT50
Rear panel of the main unit
Wireless transceiver
(EZW-RT50 (except Chinese model) 
or EZW-RT20 (Chinese model))
2.  Insert the wireless transceiver (EZW-RT50 (except Chi-
nese model) or EZW-RT20 (Chinese model)) into the TA-
SA300WR.
 
Rear panel of the TA-SA300WR
EZW
-RT
50
Wireless transceiver
(EZW-RT50 (except Chinese model) 
or EZW-RT20 (Chinese model))
3.  Connect the AC power cord of the main unit.
4. Press 
[\/1] button on the main unit to turn the system on.
 
"/1
[      ] button
5.  Connect the AC power cord of the TA-SA300WR.
6.  When wireless transmission is activated, the [LINK/STAND-
BY] indicator turns green.
 
LINK/STANDBY
[LINK/STANDBY] indicator
7.  Press the button in order of the [DISPLAY] 
 [0]  [7] [2] 
 [SUBTITLE] on the remote commander corresponding to 
main unit aiming at the main unit.
8. Confi rm the [LINK/STANDBY] indicator of TA-SA300WR is 
orange lighting after step 7 is executed.
9.  The AC power cord of TA-SA300WR is pulled out to turn off 
the system.
Note: Please insert it after confi rming the [LINK/STANDBY] indicator of 
TA-SA300WR has been turned off when you insert the AC power 
cord again.
Ver. 1.4
TA-SA300WR
TA-SA300WR
10
10
SECTION  4
DIAGRAMS
4-1.  BLOCK  DIAGRAM
X101
49.152MHz
CLOCK
BUFFER
IC107
OVER LOAD
DETECT
Q107
L.P.F.
L.P.F.
POWER AMP
IC104
DC DETECT
Q105
PWM_B
6 PWM_A
8
PWM_D
16 PWM_C
18
: AUDIO
STREAM PROCESSOR
IC105
31 DATA
30 BCK
29 LRCK
21 SCDT
22 SCSHIFT
23 SCLATCH
27 INIT
FLAGL
19 SOFTMUTE
OUTL1 11
OUTL2 9
OUTR1 6
OUTR2 4
XFSOIN 48
24 FLAGR
25
OUT_D
OUT_C 31
28
OVER LOAD
DETECT
Q106
L.P.F.
L.P.F.
OUT_B
OUT_A 39
36
/SD
5
/RESET_AB
7
/RESET_CD
17
36 XFSIIN
14 XFSOOUT
D FLIP-FLOP
IC103
S500
I/1
POWER
DETECT
Q104
D111
P_CONT1 (3.3V) 13
SYSTEM CONTROLLER
IC100
CN101
SDIO_Z
28
I2CSDA
21
I2CCLK
22
INT
18
RESET
23
BCK_Z
29
LRCK_Z
30
+3.3V
14
+3.3V
+3.3V
13
256FS
17
S-AIR_DATA
2
S-AIR_CLK
64
S-AIR_GPIO2
48
S-AIR_RESET
50
DRIVE_RST(EN) 28
DRIVE_SD 45
DAMP_SCDT 27
DAMP_SHIFT 25
DAMP_LATCH 31
DAMP_INIT 29
DAMP_OVF 30
DAMP_S_MUTE 32
DC_DET 43
PVDD_SD_EN 42
P_CONT_PVDD 14
KEY_POWER
49
KEY_PAIRING
51
9
7
X100
20MHz
Xin
Xout
EZW-RT50
WIRELESS
TRANSCEIVER
EZW-RT50
(EXCEPT CH)
EZW-RT20
(CH)
22 LED_RED
21 LED_GREEN
D580
LINK/STANDBY
LED DRIVE
Q109, 111
S100
SECURE LINK
SHUNT
REGULATOR
IC950
(AC IN)
F900
TH900
D911
RECT
D900
LINE FILTER
LF900
(EXCEPT US, 
CND, MX, TW, PX)
LF901
(US, CND, MX,
 TW, PX)
POWER CONTROL
IC910
T901
SUB POWER
TRANSFORMER
DRAIN
8
DRAIN
7
ISOLATOR
PC901
ISOLATOR
PC902
VCC
2
FB
4
1
POWER CONTROL
IC920
D
T902
MAIN POWER
TRANSFORMER
D924
D928
D925, 926
OVER LOAD
PROTECT
Q921, 922
4 VCC
7 OCP/BD
5 OLP/SS
TH920
RECT
D940
D902
6 FB
REGULATOR
Q923
D950
POWER ON/OFF
CONTROL
Q960
ISOLATOR
PC903
POWER VOLTAGE
CONTROL
Q961, 962
+3.3V
REGULATOR
IC108
+3.3V
+3.3V_IC103, IC105
E4V
+1.8V
REGULATOR
IC106
+1.8V
RESET SWITCH
Q102
RESET 6
AC_CUT 36
E3.3V
VOLTAGE
DETECTOR
IC101
P_CONT2 12
+12V
REGULATOR
IC109
+12V
32V
D112
D901
D929 D930 D931
SHUNT
REGULATOR
IC940
RESERVED
1
DETECT
2
S-AIR FREQ DET
46
S-AIR DET
47
POWER
DETECT
Q108
SHUT DOWN
SWITCH
Q103
REGULATOR
Q920
B+ SWITCH
Q901
B+ SWITCH
Q110, 112
SIGNAL PATH
_
_
TB300
+
+
R
SPEAKERS
L
x
Abbreviation
CH  : Chinese model
CND  : Canadian model
MX  : Latin American model
TW : 
Taiwan 
model
EZW-RT20
(EXCEPT CH)
(CH)
Ver. 1.4
TA-SA300WR
TA-SA300WR
11
11
• Waveforms
– WLK4 MAIN Board –
For Schematic Diagrams.
Note:
•  All capacitors are in 
μF unless otherwise noted. (p: pF) 50 
WV or less are not indicated except for electrolytics and 
tantalums.
•  All resistors are in 
Ω and 1/4 W or less unless otherwise 
specifi ed.
•      f 
: internal component.
• 
2 : Nonfl ammable resistor.
• 
5 : Fusible resistor.
• 
C : panel designation.
THIS  NOTE  IS  COMMON  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• 
A : B+ Line.
•  Voltages and waveforms are dc with respect to ground 
under no-signal conditions.
  no mark : POWER ON
•  Voltages are taken with VOM (Input impedance 10 M
).
  Voltage variations may be noted due to normal production 
tolerances.
•  Waveforms are taken with a oscilloscope.
  Voltage variations may be noted due to normal production 
tolerances.
•  Circled numbers refer to waveforms.
• Signal path.
 
F : 
AUDIO
• Abbreviation
  CH 
: Chinese model
  CND  : Canadian model
  MX 
: Latin American model
 TW  : 
Taiwan 
model
For Printed Wiring Boards.
Note:
• 
X : Parts extracted from the component side.
• 
Y : Parts extracted from the conductor side.
•      f 
: Internal component.
• 
 : Pattern from the side which enables seeing.
  (The other layers' patterns are not indicated.)
Caution:
Pattern face side:
(Conductor Side)
Parts face side: 
(Component Side)
Parts on the pattern face side seen 
from the pattern face are indicated.
Parts on the parts face side seen from 
the parts face are indicated.
•  Indication of transistor.
 
C
B
These are omitted. 
E
Q
 
C E
B
These are omitted. 
• Abbreviation
  CH 
: Chinese model
  CND  : Canadian model
  MX 
: Latin American model
 TW  : 
Taiwan 
model
1
IC100 
7 (Xout)
1 V/DIV, 20 ns/DIV
50 ns
1.6 Vp-p
2
IC105 
qf (XFSOOUT)
2 V/DIV, 10 ns/DIV
21 ns
3.3 Vp-p
3
IC105 
eh (XFSIIN)
2 V/DIV, 50 ns/DIV
81.5 ns
3.6 Vp-p
4
IC105 
rk (XFSOIN)
2 V/DIV, 10 ns/DIV
21 ns
3.7 Vp-p
5
IC107 
2 (A)
2 V/DIV, 10 ns/DIV
20 ns
3 Vp-p
Ver. 1.4
Note: The components identifi ed by mark 
0 or 
dotted line with mark 
0 are critical for safety. 
 
Replace only with part number specifi ed.
Note: Les composants identifi és par une marque 
0 sont critiques pour la sécurité. 
 
Ne les remplacer que par une piéce portant 
le numéro spécifi é.
TA-SA300WR
TA-SA300WR
12
12
A
BOARD
WLK4-PANEL
CN304
WLK4 MAIN
BOARD
(2/2)
1
1
IC B/D
3.3
0
0
3
3.3
3.3
3.3
3.3
3.3
0
3.3
3.3
3.3
3.3
0
0
0
3.3
3.3
3.3
3.3
3.3
3.3
2
2.7
0
3.3
1.8
1.6
3.3
3.3
3.3
3.3
3.3
0
3.3
2.1
4.2
4.2
3.3
4.2
0
4.2
4.2
0
0
0
2
47k
R127
4.7k
R128
0.1
C104
100k
R117
4.7k
R111
R119
10k
1
2
3
4
5
6
7
8
9
9P
CN102
D-GND
TXD1
RTS1
3.3V
CLK1
RXD1
CNVSS
RESET
D-GND
4.7k
R126
10V
100
C115
R130
10k
10k
R113
1k
R103
10k
R104
0
R120
4.7k
R110
0.1
C110
R226
180
R227
180
0.1
C107
R149
100
R154
100
R153 100
R152
100
R158
100
R160
220
R159
330
0.1
C116
JL149
JL150
JL148
JL123
JL124
JL122
JL116
JL117
JL118
JL119
JL114
JL113
JL126
JL125
JL100
JL101
CL137
CL136
CL135
CL134
CL132
CL131
CL130
CL129
CL1
16
CL138
CL139
CL1
14
C
L111
CL1
17
CL128
CL1
12
CL1
10
CL127
CL118
CL120
CL124
CL123
4.7k
R148
CL108
CL125
CL1
19
CL109
CL100
CL102
CL103
CL107
100k
R114
JL105
JL104
10k
R121
100k
R115
0.22
C106
47k
R112
47k
R118
JL107
0.01
C108
JL106
0.022
C114
0.1
C109
LSCR523UBFS8TL
Q102
10k
R109
R125
100
0.1
C103
2
3
4
5
5P
CN103
NC
1
GND
LED(R)
LED(G)
POWER_SW
R5F212BASNFP
IC100
1
NO USE
2
S-AIR_DA
TA
3
FW_MODE
4
NO USE
5
NO USE
6
RESET
7
Xout
8
Vss
9
Xin
10
Vcc1
11
NO USE
12
P_CONT2
13
P_CONT1(3.3V)
14
P_CONT_PVDD
15
NO USE
16
NO USE
17
NO USE
18
NO USE
19
NO USE
20
NO USE
21
LED_GREEN
22
LED_RED
23
PAIRING_LED
24
NO USE
25
DAMP_SHIFT
26
NO USE
27
DAMP_SCDT
28
DRIVE_RST(EN)
29
DAMP_INIT
30
DAMP_OVF
31
DAMP_LATCH
32
DAMP_S_MUTE
33
DAMP_OVF2
34
DAMP_LA
TCH2
35
NO USE
36
AC_CUT
37
FW_TxD
38
FW_RxD
39
NO USE
40
NO USE
41
NO USE
42
PVDD_SD_EN
43
DC_DET
44
NO USE
45
DRIVE_SD
46
S-AIR FREQ DET
47
S-AIR DET
48
S-AIR_GPIO2
49 KEY_POWER
50 S-AIR_RESET
51 KEY_PAIRING
52 SUR_MODE_SW
53 SHIMUKE
54 MODEL
55 FAN_ON
56 FAN_DET
57 S-AIR_RF_FB
58 NO USE
59 Vss
60 NO USE
61 Vref
62
Vcc1
63
NO USE
64
S-AIR_CLK
CL140
CL113
0
R162
CL106
CL105
CL104
100
R131
JL120
JL121
JL115
JL112
JL111
JL110
JL109
JL108
S100
CL101
CL126
CL121
CL122
100
RB002
SL101
SL102
SL1
16
SL1
17
SL1
18
SL1
19
SL120
SL121
RN2902
Q111
DA2J10100L
D101
CL163
CL164
CL165
CL166
CL167
CL168
CL169
CL170
CL171
CL173
CL174
CL175
CL176
20MHz
X100
1
RESERVED
2
DETECT
3
RESERVE
4
NC
5
NC
6
LRCK_X
7
BCK_X
8
SDIO_X
9
LRCK_W
10
BCK_W
11
SDIO_W
12
GND
13
+3.3V
14
+3.3V
15
GND
16
GND
17
256FS
18
INT
19
PD-OUT_Airoha
20
NC
21
I2CSDA
22
I2CCLK
23
RESET
24
GND
25
SDIO_Y
26
BCK_Y
27
LRCK_Y
28
SDIO_Z
29
BCK_Z
30
LRCK_Z
100k
R249
RN1902
Q109
CL177
CL178
CL179
CL180
CL181
CL182
CL183
100
R250
PST8435UL
IC101
1
GND
2
VDD
3
CD
4
OUT
R129
100
6.3V
470
C200
0
R248
0.01
C105
RXD1
CNVSS
RESET
CNVSS
RESN
SCL
SDA
GPI02
TXD1
SCL
GPI02
1M
R124
DETECT
2.4/5.8_DET
256FS
RESN
BCK
LRCK
DATA
TXD1
RXD1
2.4/5.8_DET
DETECT
RESET
SDA
1
5
6
7
8
9
10
11
12
13
14
17
4
18
16
15
2
3
VOLTAGE DETECTOR
IC101
SYSTEM CONTROLLER
IC100
-1
-2
-2 -1
WLK4 MAIN BOARD (1/2)
LED DRIVE
LED DRIVE
(NC)
EZW-RT50
WIRELESS
TRANSCEIVER
(EXCEPT CH)
EZW-RT20 (CH)
SECURE
LINK
RESET SWITCH
13
A
E
D
C
4
14
8
G
B
1
11
3
10
I
9
J
F
H
6
2
5
7
12
30P
CN101
EZW-RT50
(EXCEPT CH)
EZW-RT20
(CH)
4-2.  SCHEMATIC  DIAGRAM - WLK4 MAIN Board (1/2) -
• See page 11 for Waveforms.   • See page 18 for IC Block Diagrams.   • See page 20 for IC Pin Function Description.
(Page 13)
(Page 15)
Ver. 1.5
Note 1: Ref. No. R120 and R124 on the 
MAIN board may not be mounted.
Note 2: When exchanging the Ref. No. X100 on the MAIN board, check whether or not Ref. No. 
R124 on the MAIN board is mounted.
 
When Ref. No. R124 on the MAIN board is mounted, exchange with the New type, when 
Ref. No. R124 on the MAIN board is not mounted, exchange with the Former type.
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