Troubleshooting Your System - DCS 992 User Manual

dCS 992 User Manual
dCS Ltd

Troubleshooting Your System

The unit fails to power up
The unit hangs up after a period of use
The unit fails to slave to an external reference
Equipment does not lock reliably to the dCS 992
The synchronised equipment reports the wrong sample rate
Manual part no: DOC063992 iss 2A1
Contact on + 44 1799 531 999
dCS
(inside the UK replace + 44 with 0)
If you experience difficulties when using your dCS 992, the following suggestions
may help to resolve the problem.
•
Ensure there is power available on the mains cable and the units mains
switch is On.
•
Check the rated supply voltage shown on the rear of the unit matches the
local supply voltage.
•
Check that the fuse has not blown - if so, correct any obvious cause then
replace the fuse as described in the section
page 60.
•
Check that the mains cable is pushed fully home into the mains inlet in the
rear of the unit.
•
This can result from power brown-outs or lightning discharges causing the
internal microcontroller to crash. Try switching off for 10 seconds then
powering up again.
•
If the unit hangs up again, try a different mains outlet and cable.
•
Press the Master/Slave
is connected, the Slave
seconds.
•
Check that the External Sync cable is of the correct type, connected
correctly and is not damaged.
Test In
•
Check that the
•
Connect a different piece of digital equipment to test the locking capability of
the unit. If the condition persists, contact your Distributor or dCS.
•
Check that the digital audio cable is of the right type, correctly connected
and not damaged. Damaged cables are a VERY common source of
malfunctions!
•
Check that the equipment to be synchronised is set to receive a reference
input.
•
The cable length may be excessive, especially if the fault occurs at 88.2 or
96kS/s but not at 48kS/s. See
• Try a connecting to a different AES/EBU or Word Clock output (as
appropriate) to see if this cures the fault.
•
If this condition persists, contact dCS or your distributor.
•
If the dCS 992 is set to 88.2 or 96kS/s but the synchronised equipment
reports 44.1 or 48kS/s, the Output Format may be set to Dual AES (2 on the
Format display) while the synchronised equipment is set to Single AES.
Press the Output Format
•
The Phase Locked Loop (PLL) in some equipment may incorrectly identify
88.2 or 96kS/s clock signals and lock at half the incoming sample rate. Try
changing inputs or unplugging then reconnecting the reference cable to
force a re-lock.
•
If you change the dCS 992 sample rate but the synchronised equipment
ignores the change, it is probably not set to accept a reference input or auto-
slave.
x
x
button to select
LED should light and the unit should lock after a few
option is set to In.
How Far will it Go?
button to correct this.
Page 66
Manual for Software Version 2.0x
January 2001
User Changeable Parts
Slave
mode. If a suitable reference
on page 49.
file 063992ma2a1.pdf available from website
email to: more@dcsltd.co.uk
web site: www.dcsltd.co.uk
on