Cap2100 Dc Protection Test; Short-Circuit Protection Test - Classe Audio Delta Series Service Manual

CAP2100 DC protection test

As above, but use any single-ended input (only one per side) and set volume to 80.
Note: For the DC protection test, you can accept a difference of +/-5mVdc to trigger the protection

Short-circuit protection test

Apply a 75mVrms / 2kHz signal (sinewave) to the single-ended input of the amplifier. Short the output with a
jumper wire. This will trigger the protection circuits as above. Repeat this test for all inputs. For the CAP2100,
do the test at volume 80.
Polarity phase / Ground detection test
For a CA2100
This test will tell you if the ac sensor board detects the ground and the polarity phase.
For this test you will need the Palm PDA with a RS-232 cable, an inverted polarity phase ac cable and an ac
cable without ground. Be sure that you perform this test when your unit is 120Vac wired because when using
a step-up transformer, your ground will never be there.
First, plug your unit with your ground missing cable. After, plug the Palm PDA to your RS-232 connector.
From the PDA menu, open the ONLINE program. Click on the ON button, after from MACRO button, select
the SDP command. If everything is ok you should see:
AC Setting = 120
Line V = 123 V
Current = 0.1 A
Line Freq. = 59 Hz
Internal Temp. = 30 C
Ground is defective
OK
After this test, perform the same step, but plug the inverted phase ac cable to the unit.
If everything is ok you should see:
AC Setting = 120
Line V = 123 V
Current = 0.1 A
Line Freq. = 59 Hz
CA(P)2100 AMP Service Manual v1.4 inc voltage change info .doc Page 32 of 50