Final Testing - Classe Audio Delta Series Service Manual

Audio Precision measurements (results logged in computer database)

Final testing:

Visual inspection (everything !) & modifications check
Final bias adjustment (at 120V)
Software versions check
AC-control calibration check
AUX power supply voltages
Current sensor zero calibration check
Main power supply and MOSFET rail voltages
Main plug-in board rails
Bias verification
Output DC offsets
Soft-start and bias relays check
Signal through (both balanced and single-ended, all channels)
Full power + oscillation check (with load)
Current sensor calibration 2
Noise (listening with terminated and unterminated inputs, BAL and SE)
Trigger function
Remote control and IR functions
DC protection
Short-circuit protection
CAN-bus communication
Voltage Selection (final)
Internal fuses change (if needed)
Visual inspection (everything !)
Full power + oscillation check (with load)
Noise (listening with terminated and unterminated inputs, BAL and SE)
RS-232 functions (including calibration checks, parameter settings)
DIM levels test
All button functions
Audio Precision final testing (both balanced and single-ended, all channels)
Main fuse change (new)
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Burn-in 1 (open unit on idle, 2 nights at 120Vac)
Final Test Part 1 (open unit):
Close unit (shipping guys install wrap and top cover)
Burn-in 2 (music & load, 3 nights at final AC)
Final Test Part 2 (closed unit)
Last Test (Vladimir)
Power-up and power-down noises check
Listening (both BAL and SE, + Mute check)
Function test (buttons only)
LED level check
Final data logging (via RS-232) and printout
Shipping (unit packed)
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