Power Amplifier Board - Philips MX1060D Service Manual

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
12-1
LM3886 INTERNAL BLOCK
V+
1
LM3886
10
+
V +
IN
9
-
V -
IN
7 4
GND
V-
uPC1237 INTERNAL BLOCK
uPC1237
1
Overload detector
2
Output Offset detector
Switch for latch/automatic - reset
12-1
V+ NC NC NC
5 2 6 11
3
OUTPUT
8
MUTE
Vcc
7
8
6
Vcc ON
mute
AC - OFF detector
5
3 4
GND