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AMPLIFIER / JACK / LED BOARD
TABLE OF CONTENTS
Internal IC Diagram & Voltages............................................ 4-1
Circuit Diagram .................................................................... 4-2
PCB Layout View ................................................................. 4-3
Electrical Part list ................................................................. 4-4
4-1
TDA7293 INTERNAL DIAGRAM
2
IN-
-
3
IN+
+
4
SGND
10
MUTE
MUTE
9
STBY
STBY
1
STBY-GND
VOLTAGES
IC501 (TDA7293)
1
2
3
4
5
PIN NO.
VOLTAGE
0V
0V
0V
0V
0.3V
13.8V 29.7V
IC401 (LM324N)
1
2
3
4
5
PIN NO.
VOLTAGE
0V
0V
0V
15.1V 0.4V
IC301 (4558D)
1
2
3
4
5
PIN NO.
VOLTAGE
1.4V
4.9V
1V
0V
4.4V
4.9V
IC502 (4558D)
1
2
3
4
5
PIN NO.
VOLTAGE
0V
0V
0V
-15V
0V
4-1
BUFFER
+Vs
DRIVER
+PWVs
3
7
11
14
OUT
12
BOOT
LOADER
6
BOOTSTRAP
5
CLIP DET
THERMAL
S/C
SHUTDOWN
PROTECTION
8
15
-Vs
-PWVs
6
7
8
9
10
11
12
13
-29.7V
15.5V 13.2V
0.6V
0V
29.7V
6
7
8
9
10
11
12
13
3V
-15.2V
0V
0V
0V
-14.9V
0V
0V
Pin
B
C
Location
Q301
0V
0V
6
7
8
Q302
0V
0V
3.9V
8.8V
Q303
0V
0V
Q304
0.6V
0.7V
Q305
0V
0V
Q306
0V
0.4V
6
7
8
Q501
0V
15.3V
0V
0V
15.2V
Q502
0V
0V
Q506
0V
0V
14
15
0V
-29.6V
14
0V
E
0V
0V
0V
0V
0V
0V
0V
0V
0V
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