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English --
External Logic Devices
AMS8100 logic levels are directly compatible with TTL
and 5-volt CMOS logic families. For information on logic gate
use, refer to the
TTL Cookbook
and
CMOS Cookbook
, both by
D. Lancaster, Howard Sams Publishing Co.
Mixer logic may be used with 15-volt CMOS logic if a pull-
up resistor is used with each GATE output (see illustration
15-VOLT CMOS
—Channel 1 modified).
Digital Controls or Microcomputers
The AMS8100 logic pins can interface with custom-de-
signed digital control circuitry or microcomputers for unlimited
possibilities of system control functions.
15--VOLT CMOS
15 V
POWER
SUPPLY
+
--
CMOS
GATES
5.1 K
G1
M1
O1
LOGIC
GROUND
VOLTAGE SELECTION
The AMS8100 can be internally modified to operate from
220--240 Vac, 50/60 Hz power.
WARNING
Voltages in this equipment are hazardous to life.
No user-serviceable parts inside. Refer all
servicing to qualified service personnel.
The safety certifications of the AMS8100 do not
apply when the operating voltage is changed
from the factory setting.
To change the operating voltage, follow these steps.
1. Disconnect the AMS8100 from the ac power source.
2. Remove the eight Phillips head screws securing the top cov-
er.
3. Locate Voltage Selector switch SW903 adjacent to power
transformer T901 and, using a screwdriver, turn the center
rotor to the 230 V position.
4. Locate Fuse F901 and remove it. Replace it with a 100 mA,
250 V, time delay fuse for 220--240-volt operation (200 mA,
250 V, slow-blow fuse for 100--120-volt operation).
Fuse part numbers are:
Fuse Type
Shure Part No.
Littelfuse Part
No.
100 mA, 250 V
80C258
218.100
200 mA, 250 V
80BC8196
239.200
5. Replace the power cord with a cord rated for for 220--240 V
operation, i.e., an IEC appliance connector on the equip-
ment end and a CEE 7/7 (“Schuko”) mains connector on the
other.*
Similarly, the AMS8100E can be internally modified to oper-
ate from 100--120 Vac, 50/60 Hz power.
To change the operating voltage, follow these steps.
1. Disconnect the AMS8100E from the ac power source.
2. Remove the eight Phillips head screws securing the top cov-
er.
3. Locate Voltage Selector switch SW903 adjacent to power
transformer T901 and, using a screwdriver, turn the center
rotor to the 115 V position.
4. Locate Fuse F901 and remove it. Replace it with a 200 mA,
250 V, time delay fuse for 100--120-volt operation (100 mA,
250 V, slow-blow fuse for 220--240-volt operation).
Fuse part numbers are:
Fuse Type
Shure Part No.
Littelfuse Part
No.
200 mA, 250 V
80BC8196
239.200
100 mA, 250 V
80C258
218.100
5. Replace the power cord with a cord rated for for 100--120 V
operation, i.e., an IEC appliance connector on the equip-
ment end and a mains connector suitable for 100--120 V op-
eration on the other.*