Symptom
|
Cause
|
Cure
|
| Noisy fan |
Design issue - typically suggest that it is required |
Providing that the user has adequate rack ventilation (space above & below) and locates the unit away from really hot gear, the fan can be removed by snipping power |
| All lights stay locked on in the adat digital clocking display |
Likely either 5v power rail or poorly seated chips in the adat section on digital card |
Re-seat socketed adat chips on digital card |
| Hum on all channels and ripple in power supplies, audible transformer hum |
Faulty power supply regulators - L7818, L7918, L7805 etc |
Replace regulators but also investigate any issues on digital board, power on with or without card power |
| Burning smell coming from the unit but no burnt components |
This is a rare mystery here. No cause found, likely the 1000uF cap near gain pot. |
Unknown, call David! |
| Crackles and pops when recording via digital output |
Poor clocking in end users studio environment |
Clock ASP008 as master and send word clock to receiving device via ADAT (set to internal clock on ASP008 and external (adat sync) on interface |
| |
|
Alternatively, set interface as master (internal clock) and run BNC wordclock to the ASP008 setting it to slave (external clock). |
| Dropouts and bursts of noise from digital card at full scale |
Lower power rails due to sagging line voltage, often in generator powered environments |
No cure, just suggest that a suitable power source is to be found |
| Cracked ADAT port due to shipping impact |
Shipping monkeys |
Replace adat connector (contact for part supply if unobtainable) and re-test |
| Powers on with all RED peak leds illuminated |
Ceck for burnt components and internal fuses, otherwise likely a voltage regulator issue |
Replace any burnt parts, fuses and/or voltage regulators |
| Low signal level in one ADC output via AES or ADAT |
Damaged WM8786 Wolfson ADC chip |
Replace, mouser has stock quite often |
| Crackles in digital output that develop over time when warm |
Faulty wavefront semiconductor ADAT chip |
Exchange of card likely best |
