Oxmoor DCA-2 - Manual (Page 12)

DCA-2 & RC-16 TROUBLESHOOTING
Page 10
SYMPTOM POSSIBLE CAUSE & CURE
No signal comes out of
the DCA-2 with signal
applied to the input(s). Power is not present. Check POWER indicator on front panel, rear-panel fuse,
and AC outlet.
PRESET is turned down all the way to “kill” the sound. Try adjusting an
RC-16.
PRIORITY is turned down all the way to “kill,” and a PRIORITY switch is closed
somewhere in the system. Try unplugging the REMOTE CONTROL INPUT
cables from the DCA-2. Power down the unit, set PRIORITY level to #8, and
reapply power.
Signal level is too low,
even with the RC-16
set at MAXIMUM. The recessed gain trim control(s) on the DCA-2 front panel are turned down.
Readjust them.
PRIORITY is turned down and a PRIORITY switch somewhere in the system is
closed. Try unplugging the REMOTE CONTROL INPUT cables from the DCA-2.
Power down the unit, set PRIORITY level to #8, and reapply power.
The input level to the DCA-2 is too low. Check output of the device feeding it.
Signal level is so high
that the RC-16 must
be set nearly to
MINIMUM gain.
Recessed gain trim control(s) on the DCA-2 front panel are turned up. Readjust.
The input level to the DCA-2 is too high. Check output of the device feeding it.
Audio is distorted,
regardless of the level
setting. The level applied to the DCA-2 is too high. Be sure it is not over +20 dBu. Turning
down the front panel gain trim may yield the correct DCA-2 output level, but it
does not prevent overdrive of the input stage.
The DCA-2 output is terminated with an impedance below 600 ohms.
The signal applied to the DCA-2 is already distorted. Check it with the DCA-2 out
of the circuit.
None of the RC-16s
alter the level, and the
Virtual Pointers
remain fixed.
The PRESET or PRIORITY and GROUND contacts on an RC-16 or the
interconnecting cable are shorted together. Try connecting one RC-16 directly to
the DCA-2 REMOTE CONTROL INPUT with a known good cable and see if this
works. If so, look for the problem in the rest of the system.
One or more of the
RC-16s is inoperative.
Two linked channels
don’t track with the
same levels.
Levels move in oppo-
site directions on two
DCA-2 channels.
A security key (or the jumper in its place) is not installed.
A control cable is miswired.
The input trim pots (DCA-2 front panel) are set differently.
The control signals for the two channels were linked after the DCA-2 was turned
on. Power down the unit, then reapply power.
A link cable is miswired between the two channels. The polarity should be
reversed.