7. TEST PROCEDURE
Visual Check:
1. Check the APM120 (160) surface and be sure no frication of the unit.
2. Check all the screw and be sure that it installed in the right position;
3. Check all the knobs and be sure no frication of it;
4. Check all the keys and be sure no frication of it.
Instruments Setting:
1. Release all the keys;
2. Rotate the potentiometer of GAIN, AUX, 2TR IN LEVEL and EQ FREQ to minimum
in counterclockwise;
3. Rotate the potentiometer of EQ GAIN, EQ FREQ, PAN, BAL, PHONES, ST SUB
OUT and ST SUB IN to midpoint;
4. Slide the potentiometer of all channels, push the EFFECT RTN to
"-∞",
and push the
potentiometer of AUX LEVEL, MONO OUT LEVEL, ST OUT LEVEL and 9-band EQ
to "0";
5. Turn the Phantom Power and witch to "OFF", push the AMP MODE switch to top.
Input signal: 1 KHz sine wave signal (except the special instruction).
The unit have power, the power indicator in board will light up; press the DFX MUTE
key down, the PEAK indicator will decrease.
1. MONO CH Test
1). Switch the +48V PHANTOM of the tested channel to
"
ON
"
(every four MONO CH in
share), the indicator will light up (red), the corresponding channel MIC socket 2, 3 pin
have 47±2V voltage; Insert the tested LED socket to MIC socket, the two LED will light
up and the illumination will match with the sample;
After the test is OK, turn the switch to
"
OFF
";
2). Input from MIC: BAL-XLR, -30dB, the INSERT output signal of the corresponding
channel is BNC-UNBAL, -30
±
2dB; turn the GAIN knob to maximum, the INSERT
output is 15
±
2dB.
After the test is OK, turn the knob to minimum;
Input from LINE IN: UNBAL-BNC, -20
±
2dB, the INSERT output signal of corresponding
channel is -35
±
2dB; rotate the GAIN knob to midpoint, the INSERT output is -5
±
2dB.
Rotate the GAIN knob to maximum, the INSERT output is 10
±
2dB.
After the test is OK, rotate the knob to minimum;
3). Input from MIC: BAL-XLR, 1dB, pushes the ST OUT slide potentiometer and the tested
channel slide potentiometer to
"
0
",
the ST OUT output is 0±2dB, and the right LEVEL
indicator light in 0dB; rotate the GAIN potentiometer to maximum in clockwise, the
output will increase gradually, the channel LEVEL and main output LEVEL indicator
signal will enhance gradually, and to CLIP in the end; rotate the GAIN potentiometer to
min; insert the disconnect jack to the tested channel INSERT socket, the ST OUT has
no output;
