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14.8. PA-Board (2 of 3) Schematic Diagram
PA-BOARD TXNPA1QCSE(2/3)
!
1
2
3
C2417
16V
4.7u
4
5
C2422
16V
4.7u
AUDIO MUTE
Q2311
2SD0601A0L
R2390
1k
6
7
8
9
TH-42PA20B/E
PA-Board(2of3)Schematic Diagram
8
+9V
C2339
C2401
50V
50V
10u
Q2402
0.01u
2SD0601A0L
R2401
L AMP
10k
R2405
R2403
560
10k
R2307
270
R2305
1.2k
R2402
10k
Q2403
R AMP
2SD0601A0L
R2406
560
R2404
R2308
10k
270
R2306
1.2k
R2393
0
R2391
10k
C2342
50V
10u
R2392
22k
R2398
1k
Q2309
2SD0601A0L
SP MUTE
9
IC2301
C1BA00000309
SP AMP
HP IN
HP OUT
28
1
6dB
27
H/P
LIPPLE
2
STB SW
FILTER
C2305
26
LIPPLE
3
L
NC
FILTER
35V 47u
25
AMP
4
SW GND
STB SW
R2319
SW REG.PART
0
SW
24
5
NC
SW
B
HLS
DRIVE
23
SW
6
NC
E
SW
22
7
ON TIME
OUT
C2307
Vcc(SW)
21
8
NC
50V
4.7u
20
9
PRE GND
Vcc
C2309
19
10
NC
16V
2.2u
Thermal
Pad
18
IN
11
BEEP
OUT-
C2323
17
12
50V
C2311
1000p
OUT+
16
13
POWER GND
50V
6800p
15
14
POWER GND
POWER GND
C2313
50V
2.2u
IC2302
C1BA00000309
SP AMP
HP IN
HP OUT
28
1
C2306
6dB
27
H/P
LIPPLE
2
35V
STB SW
FILTER
47u
R
26
LIPPLE
3
NC
FILTER
25
AMP
4
SW GND
STB SW
R2320
SW REG.PART
0
24
SW
5
NC
SW
B
HLS
DRIVE
SW
23
6
NC
E
SW
22
7
ON TIME
OUT
C2308
21
8
NC
50V
Vcc(SW)
4.7u
20
9
PRE GND
Vcc
C2310
19
10
NC
16V
Thermal
2.2u
Pad
18
IN
11
BEEP
OUT-
C2324
17
12
C2312
50V
50V
1000p
OUT+
16
13
POWER GND
6800p
15
14
POWER GND
POWER GND
C2314
50V
2.2u
10
JS7528
JS7525
+12Vs
SP ON/OFF
Q2301
R2317
L2303
0
ERD25V0T
2SD1266AQ0LB
C2333
L2301
25V
220uH
470u
C2321
D2301
50V
B0JCME000025
2.2u
C2325
R2311
25V
2.2
470u
1/2W
C2327
C2329
50V
50V
0.1u
0.1u
R2313
R2315
2.2
2.2
1/2W
1/2W
SP ON/OFF
R2318
Q2302
L2304
0
ERD25V0T
2SD1266AQ0LB
C2334
L2302
25V
220uH
470u
C2322
D2302
50V
B0JCME000025
2.2u
C2326
R2312
25V
2.2
470u
1/2W
C2328
C2330
50V
50V
0.1u
0.1u
R2316
R2314
2.2
2.2
1/2W
1/2W
11
TO
P-BOARD
(P7)
+15Vs
+15Vs
GNDs
GNDs
TO
SPEAKER
PA3
(SP-R & SP-L)
1
SP_R+
2
SP_R-
3
SP-L+
4
SP_L-
ER
R7539
2.2k
Q750
UNR2214
ERRO
12
44
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