Philips MX1060D - Power Amplifier Board

12-1
POWER AMPLIFIER BOARD
TABLE OF CONTENTS
LM3886 & UPC1237 Internal Block .............................. 12-1
Components Layout + Voltages .................................... 12-2
Circuit Diagram .............................................................. 12-3
Electrical parts list.......................................................... 12-4
LM3886 INTERNAL BLOCK
12-1
uPC1237 INTERNAL BLOCK
1
2
3
4
5
6
7
8
9
10
11
+
-
LM3886
OUTPUT
V+
NC
NC NC
V+
V-
GND
MUTE
V
IN-
V
IN+
Overload detector
Output Offset detector
Flip-flop
Switch for latch/automatic - reset
AC - OFF detector
Relay driver
Vcc ON
mute
uPC1237
1
2
34
5
6
7
8
Vcc
GND