Integrated Circuits - JBL PSW-D112 Service Manual

Amplifier/Subwoofer
15
+6V
16
v+ 17
18
O/P 19
20
V- 21
22
+15V 23
24
SD
FR 25
26
I/P
GND 27
28
-15V
U1, U2 - (LM324 TL064) Quad Op Amp
IN 4 -
OUT 4
14 13
4
1
1 2
IN 1 -
OUT 1
Q4, Q5, Q10, Q11 TR1
- (MPS A56) (2N5401)
PNP Transistor
3 Collector
2
Base
1 Emitter
1
2 3
PSW-D112/DPS-12 INTEGRATED CIRCUITS
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.
10 5)
SD
Use only rosin-core or non-acid core solder; thoroughly de-flux the
surfaces after soldering.
11 FR
12 If the new S53AMI/S64AMI Amp Module has larger mounting hole(s) in
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 +
IN 3 + IN 3 -
GND
12 11 10 9
3
2
3 4 5 6
IN 1 + IN 2 + IN 2 -
V+
Q3 - (2N3904),
NPN Transistor
1
2
3
U3, U4 - (TLO 82) Dual Op Amp
OUT 3
8
A OUTPUT
A -INPUT
A +INPUT
-
V
7
OUT 2
Q12 - (2N4401)
3 Collector
2
Base
1 Emitter
1
PSW-D112/DPS-12
before soldering
1 8
2 7
A
-
+
3 6
B
-
+
4
5
TR2 - (MPS A13)
30V NPN(Darl) Transistor
3 Collector
2
Base
1 Emitter
2
3
or
+
V
B OUTPUT
B -INPUT
B +INPUT
2 9