Final Assembly Qc; Items Required; Assembly; Power Test - Alesis DEQ224 Service Manual

5) Final Assembly QC

Items Required

1 ME1 Assembled Unit (DUT)
1 P3 type Alesis Power Supply
1 CD Player with CD (can be of any music or just test tones)
2 RCA to 1/4" PHONE PLUG Cables
2 1/4" PHONE to 1/4" PHONE Cables
1 Pair of powered audio monitors such as Alesis M1 Active (8N or 8M)

Assembly

1) Connect CD Player Left Out to DUT Channel A IN using RCA to 1/4"
PHONE PLUG Cable.
2) Connect CD Player Right Out to DUT Channel B IN using RCA to 1/4"
PHONE PLUG Cable.
3) Connect DUT Channel A OUT to one Alesis M1 Active speaker using 1/4"
PHONE to 1/4" PHONE Cable.
3) Connect DUT Channel B OUT to one Alesis M1 Active speaker using 1/4"
PHONE to 1/4" PHONE Cable.
4) Connect IEC power cabling for Alesis M1 Active speakers and turn the
speakers on. Adjust input trim knob to detent (center).
5) DUT is ready for testing.

Power Test

1) Plug the P3 type Alesis Power Supply into a power source and the
barrel jack into the Rear Panel Power In jack.
Verify that the front panel LEDs show normal power up message,
"DEQ224".
Verify that the LEDs do not flicker and are of a consistent
brightness.
Problems with this inspection indicate that the front panel
sub-assembly has been incorrectly connected to the rear panel
sub-assembly.
cabling seems faulty or incorrectly installed, correct the
problem and repeat the Power Test. If the cabling seems okay,
then one of the sub-assemblies is damaged and that this
inspection has FAILED.
Failure of this test indicates that this DUT cannot continue
testing.
2) Unplug the power supply. Continue with Functionality Test if DUT has
not failed.
Continue with Power Test.
Open the unit and inspect the cabling. If the