Sensor /Control Module Check 2; Dc-Protection Check; Trigger Function Check; Ir Function Check - Classe Audio Delta Series Service Manual

Sensor/Control module check 2:
Once the system is powered on, type in "sda" (follower by the Enter key). The sensor/control modules will
return a real-time snapshot of current and temperature values as follows:
AMP1: POS 0A | NEG 0A | TEMP 10C
AMP2: POS 0A | NEG 0A | TEMP 6C
OK
Ignore the temperature readouts at this point – they are incorrect because the sensors are on the heatsinks
which are not present. The thing to check here is that there are no error messages (DC protects etc.) To
trigger a DC fault you can simply pull off the jumper between pins 1 and 2 on connector TO_OP on one of
the sensor/control modules.

DC-protection check:

Repeat the following procedure on each of the sensor/control modules:
Use a 10k ohm resistor to jumper a variable DC voltage to pin 5 of connector TO_OP. Raise the DC voltage
slowly from zero to 2.5Vdc. The DC protection should trigger when you exceed +2Vdc. When the module
enters protection mode, the corresponding channel LED should flash
until the AC has been unplugged (or an "rff" command has been issued via the RS-232 port).
Repeat as above but lower the DC from zero to –2.5Vdc. The DC protection should trigger when you exceed -
2Vdc. Again, the corresponding channel LED should flash

Trigger function check:

Connect a switched +5Vdc signal to the trigger-in input on the Trigger/IR board. When this signal pulses
positive, the output of optocoupler U101 (pin 3) will pulse positive also (it is normally low). If the amp was on
Standby it should respond by powering up. If the amp was already ON, the trigger will be ignored. When you
switch the trigger signal off, the amp will power-down (back to Standby).
The trigger-out signal is just a loop-through of the trigger-in signal. Measure it to verify that it is the same as
the trigger-in (actually about 0.2 Volts lower).

IR function check:

Check all the IR functions. To do this, connect the IR-out from an IR receiver (IR/Trigger test jig) to the IR-in of
the amplifier and use the amplifier remote to control the amp. Verify that all IR commands work as expected.
When external IR-in signal is plugged in (as above), the IR-out is a loop-through of this signal. Verify that there
is signal present on this output when a button is pressed on the remote control. Note that this line is normally
"high" (close to 5V) and it pulses "low" when a signal is present.
CA(P)2100 AMP Service Manual v1.4 inc voltage change info .doc
red AND the module should NOT restart
red AND the module should NOT restart.
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