NORMS FOR CHECKING THE MPA POWER AMPLIFIER.
- Connect a charge of 4
Ω
in each output channel CH1 CH2, CH3 and CH4
- Put the SIGNAL INPUT button on CH4 MONO
- Put a 1 kHz 0dB signal in INPUT CH1
- Check that the 4 signal present and 4 clip led indicators are on.
- Check the movement of the buttons and that each one acts independently on its own
respective channel, at the same time check that the clip led indicator goes off when you go down
approximately 2dB. Leave them on maximum.
- Check the power of 230V at the mains
Vo = 13.6v
at
4
Ω
W = 46.24
Vo = 16.7
at
8
Ω
W = 34.86
- Check that the range goes from 20Hz-20kHz.
- Put the button on 4 CH ST.
- Put a signal in through INPUT CH1 and CH2, CH3 and CH4 act as a stack-out.
- Check that there is a signal in each output and that the power is correct.
- Position 4CH QUAD.
- Check that each of the inputs CH1,CH2,CH3 and CH4 are independent and correspond to
their respective outputs. Also check that the leds of clip and SP act with their corresponding
input.
- Position 2CH BRIDGED ST.
- Put a charge of 8
Ω
in the red terminal of CH1-CH2 and do the same for CH3-CH4 ( see
diagram on amp for the correct connection)
- Check that only the buttons of CH1 affect the output formed by CH1-CH2 and the buttonof CH4
affects the output formed by CH3-CH4. The clips should act with their respective group. The
CH2 and CH3 buttons have no effect.
Vo = 28.3
8
Ω
W = 100
- Position 2 CH ST. + 1 CH BRIDGED
- Charge the CH1 and CH 2 outputs with 4
Ω
and CH3-CH4 in the red terminals with 8
Ω
.
- Check that the buttons of CH1 and CH2 affect their respective outputs and that the group
CH3-CH4 acts with the CH4 button. The CH3 button has no effect.
- The powers will be the same as in previous cases.
STEREO at 4
Ω
Vo = 13.6
W = 46.24
MONO at
8
Ω
Vo = 28.3
W = 100
- Position 2CH ST.+1CH BRIDGED LOW.
- Put signal in INPUT CH1, CH2 of 150 Hz 0dB.
- It should act the same as in the previous case.
STEREO at 4
Ω
Vo = 13.6
CH1,CH2
MONO at
8
Ω
Vo = 19.6
CH3-CH4
