PC9501N
35
3.
Inspections in BRIDGE mode
3-1.
Preparation
3-2.
Inspection
3-2-1.
Gain
Feed 1 kHz, –10.0 dBu sine wave to the input terminal, then check that +22.1
±
1.0 dB output voltage is obtained.
3-2-2.
Frequency response
Feed 20 Hz, 1 kHz, 20 kHz, -10.0 dBu sine wave to the input terminal, then check that the output voltage at 20 Hz is within
0.0
±
0.5 dB and that at 20 kHz is within –0.5
±
0.5 dB as compared with the output voltage at 1 kHz.
3-2-3.
Total harmonic distortion
Feed 1 kHz high-grade sine wave to the input terminal, then check that the total harmonic distortion is 1% or less when the
output given in the table below is obtained.
Make sure to finish this inspection within 30 seconds.
4.
LED inspections
Remove the connector assembly TE from CN603 and turn on the POWER SW. Then check that the PROTECTION LED and
TEMP LED light in red and the POWER LED lights in green. Also check that the fan runs at a high speed.
After inspection, turn off the power and reconnect the connector assembly TE to CN603 immediately.
5.
Factory setting
6.
Others
• 0 dB=0.775 V
• Use a DIN audio filter when measuring the noise level.
Input attenuator
Operation for A ch only, MAX
Input terminal
XLR-3-31 type connector, No.2: hot, No.1 and 3: ground
MODE SW
BRIDGE
HPF SW
OFF
Output terminal
Use A ch + and B ch +.
DATA PORT
Unused.
AMP ID SW
1, 2, 4, 8, 16, T OFF
Load resistance
8
Ω
+ 8
Ω
non-inductive resistance, power capability: 1 kW or more
Connection of measuring instrument
Connect to the mid-point of the load resistance with the ground floated.
PC9501N
41.2 dBu
Input attenuator
∞
(turned counterclockwise fully)
HPF SW
OFF
MODE SW
STEREO
AMP ID SW
OFF
Connector assembly TE
CN603
