Qc Test Overview - Alesis DEQ224 Service Manual

1) QC Test Overview

QC tests are performed at two primary stages, sub-assembly level, and final
assembly level. Although several of the procedures are repeated during
both stages, the sub-assembly level tests are designed to test all
functionality of the electronic sub-assemblies, while the final assembly
tests are designed to catch assembly errors.
final assembly tests, the unit should be inspected for mechanical assembly
quality. After the tests, the unit is Reset before being packaged.
Note that these tests are for the unit assembly.
include packaging and shipping QC.
The structure of the tests is as follows:
Electronic Sub-Assemblies QC
Front Panel
Test Buttons for electrical connectivity
Test LED display for electrical connectivity
Test EEPROM for electrical connectivity
Rear Panel
Test Power
Test Audio Fidelity
Assembly QC
Specifics of this QC are to be supplied by manufacturer.
The unit should be inspected before the top panel is closed for
correct assembly.
should be inspected for completion and correctness.
Inspection for appearance and mechanical completion after the top
panel is closed for correct final assembly.
screws, nuts, washers, plastic finish, metal finish, and
silkscreen should be inspected for completion, quality and
correctness.
text should be verified against the latest design for both the
front and back of the unit.
Final Assembly QC
Test LED display for appearance
Test Switches for mechanical connectivity
Test Audio for Sub-Assembly connectivity
Test Power for Sub-Assembly connectivity
Reset System
System is Reset for final packaging.
All screws, sub-panel assembly, cabling
There should be no scratches and the colors and
Between the sub-assembly and
These tests do not
All external