Bu-120/Hts-20 Ic Diagrams - Infinity BU-120 Service Manual

+6V 15 1
2
16
17
V+ 3
18
4
O/P 19
5
20
6
21 7
V-
22
8
+15V 23 9
SD 24 10
FR 25 11
I/P 26 12
GND 27 13
-15V 28 14
S53AM/S64AMI - Power Amp module SAFETY PART
BU-120 and HTS-20 rev "A" ONLY
+6V
NOTE: THE FOLLOWING PROCEDURES MUST BE FOLLOWED WHEN
INSTALLING NEW AMP MODULES:
FAILURE TO FOLLOW ONE OR MORE OF THESE STEPS MAY
RESULT IN THE INSTANT DESTRUCTION OF THE MODULE WHEN
V+
POWERED UP.
1) Align white indent marker on Amp Module with indent marker on main
O/P
PCB; alternately position of label on the top of the module; incorrectly
replacing the Module 180
2) All AC powered test instruments (meters, oscilloscopes, etc.) must
V-
have a floating ground, i.e. be connected to an isolation transformer.
3) Align and position the Amp Module before soldering.
+15V
4) Attach the amp Module with the mounting screws before soldering or
SD
powering up.
5) Use only rosin-core or non-acid core solder; thoroughly de-flux the
FR
surfaces after soldering.
I/P
If the new Amp Module has larger mounting hole(s) in the case, and
GND the stock screws no longer will fit, and screws of the proper type can-
not be obtained locally order:
-15V
(2) part# 60301S (screws)
(2) part# 60301N (nuts)
HTS-20 rev "B" ONLY
15 14 13 12 11 10
PWR MODULE
0
in the PCB slot will result in its destruction.
9 8 7 6 5 4 3
CN1
2 1