Cap2100 Aux Power Supply - Classe Audio Delta Series Service Manual

Then click on the LPI command, you should see:
INP1 = . | RTP1 =
FBI1 =
INP2 = . | RTP2 =
FBI2 =
Like the CA2100, RTP and RTN should be set to 07. To do it just clicks on CHANGE SLOW BLOW Settings. It
will automatically change the RTP and RTN. See
CA2100 AUX Power Supply
From this test, be sure you unplugged your RS-232 cable from your uni until the procedure tell you to
plug it back
Plug in the unit but do not power-up (leave it in Standby). Verify the AUX power supply voltages: you should
see +19Vdc before the 7812 voltage regulator and +12Vdc after this regulator (relative to ground on the tab
of the 7812).

CAP2100 AUX Power Supply

Plug in the unit but do not power-up (leave it in Standby). Verify the AUX power supply voltages:
Before regulator Q201 (right side of diode D201) about 17.5Vdc
After regulator Q201 (left side of diode D201) 12Vdc.
Before regulator Q101 (right side of diode D101) about 17.5Vdc
After regulator Q101 (left side of diode D101) 12Vdc.
Before regulator Q301 (left side of diode D301) about 20Vdc
After regulator Q301 (right side of diode D301) 12Vdc.
Before regulator Q302 (right side of diode D302) about -20Vdc
After regulator Q302 (left side of diode D302) -12Vdc.
Before regulator Q401 (pin 1) 12Vdc
After regulator Q401 (pin 3) 5Vdc.
Current sensor zero calibration check
Inspect the mechanical alignment of the control/sensor boards on the heatsinks. Make sure that they are
seated correctly and that the bias resistors under the boards do NOT touch the Hall-effect sensors (rings). The
current calibration of the control/sensor boards is sensitive to mechanical tolerances (namely the exact
placement and orientation of the sensor transistors relative to the Hall-effect sensors) that can be easily
affected during installation.
With the amplifier still in standby, measure the current calibration test points (T1 and T3) on the sensor/control
modules on each heatsink. The calibration points should measure 250mVdc (+7mV/ -2mV).
Main and MOSFET power supplies
Power-up the unit. Measure the following voltages: with exactly 120Vac power you should see +66Vdc on
one of the bronze nuts on the heatsink PCB and -66Vdc on the other bronze nut (relative to analog ground on
the backplate). The same goes for the MOSFET supplies on the push-on terminals on each heatsink.
Also check the voltage between the chassis ground (take from a screw hole on Heatsink) and analog ground
(Output post). Be sure that you don't have more than 4.0mVdc.
CA(P)2100 AMP Service Manual v1.4 inc voltage change info .doc
10 | RTN1 = 10 | TTP1 =
90 | RFT1 = 30 | LFE1 =
10 | RTN2 = 10 | TTP2 =
90 | RFT2 = 30 | LFE2 =
90
0
90
0
appendix B for description of the parameters.
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