Infinity HTS-20, Service Manual

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+6V 15
16
17
V+
1 +6V
2
V+ 3
18 4
O/P 19
5
O/P
20
6
V- V-
21
7
22 8
SD 24
+15V 23 9 +15V
10 SD
FR 25 11 FR
I/P 26 12 I/P
GND 27 13 GND
-15V 28 14 -15V
00228
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
POWERED UP.
1) Align white indent marker on Amp Module with indent marker on main
PCB; alternately position of label on the top of the module; incorrectly
replacing the Module 180
0 in the PCB slot will result in its destruction.
2) All AC powered test instruments (meters, oscilloscopes, etc.) must
have a floating ground, i.e. be connected to an isolation transformer.
3) Align and position the Amp Module before soldering.
4) Attach the amp Module with the mounting screws before soldering or
powering up.
5) Use only rosin-core or non-acid core solder; thoroughly de-flux the
surfaces after soldering.
If the new Amp Module has larger mounting hole(s) in the case, and
the stock screws no longer will fit, and screws of the proper type can-
not be obtained locally order:
(2) part# 60301S (screws)
(2) part# 60301N (nuts)
S53AM/S64AMI - Power Amp module SAFETY PART
BU-120 and HTS-20 rev “A” ONLY
4IN 3GND 2-15V 5S/D 6+15V 7V- 8V- 9V- 10O/
P
11
V+
12V+ 146V 13
V+
1FB 15LIMIT
PWR MODULE
CN1
00370
HTS-20 rev “B” ONLY