Bu-150 Integrated Circuit Diagrams - Infinity BU-150 Service Manual

Amplifier/Subwoofer
+6V 15
16
v+ 17
18
O/P 19
20
V- 21
22
+15V 23
SD 24
25
FR
I/P 26
27
GND
-15V 28
U1 - (LM324) Quad Op Amp
IN 4 -
OUT 4
14
13
4
1
1
2
IN 1 -
OUT 1
Q4, 5 - (MPS A56)
80V PNP Transistor
3 Collector
2
Base
1 Emitter
1
2
3

BU-150 INTEGRATED CIRCUIT DIAGRAMS

S53AMI/S64AMI - Power Amp module SAFETY PART
1 +6V
NOTE: THE FOLLOWING PROCEDURES MUST BE FOLLOWED
WHEN INSTALLING NEW S53AMI/S64AMI AMP MODULES:
2
FAILURE TO FOLLOW ONE OR MORE OF THESE STEPS MAY
RESULT IN THE INSTANT DESTRUCTION OF THE MODULE WHEN
3 v+
POWERED UP.
4
1)
Align white indent marker on Amp Module with indent marker on main
5 O/P
PCB; alternately observe position of label on the top of the module;
incorrectly replacing the Module 180 in the PCB slot will result in its
6
destruction.
2)
All AC powered test instruments (meters, oscilloscopes, etc.) must
7 V-
have a floating ground, i.e. be connected to an isolation transformer.
8
3)
Align and position the Amp Module before soldering.
4)
Attach the amp Module with the mounting screws
9 +15V
powering up.
5)
10 SD
Use only rosin-core or non-acid core solder; thoroughly de-flux the
surfaces after soldering.
11
FR
If the new S53AMI/S64AMI Amp Module has larger mounting hole(s) in
12 I/P
the case, and the stock screws no longer will fit, and screws of the
13
GND proper type cannot be obtained locally order:
(2) part# 60301S (screws)
14 -15V
(2) part# 60301N (nuts)
IN 4 +
GND IN 3 + IN 3 -
10
12 11 9
3
2
3 4 5
6
IN 1 +
V+ IN 2 + IN 2 -
Q2 - (2N3906)
40V PNP Transistor
3 Collector
2
Base
1 Emitter
1
2
3
U2 - (TLO 82) Dual Op Amp
OUT 3
8
A OUTPUT
A -INPUT
A +INPUT
-
V
7
OUT 2
Q3 - (2N3904)
40V NPN Transistor
3 Collector
2
Base
1 Emitter
1
2
3
°
before soldering
8
1
2 7
A
-
+
3 6
B
-
+
4
5
Q1 - (MPS A13)
30V NPN(Darl) Transistor
3 Collector
2
Base
1
1 Emitter
2
3
BU-150
or
+
V
B OUTPUT
B -INPUT
B +INPUT
2 1