16
DDJ-RB
1
2
3
4
A
B
C
D
E
F
1
2
3
4
5
10.13 WAVEFORMS
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10.13 WAVEFORMS
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Loose connection
/defective parts
MAIN Assy
Check the digital input signals to DAC
(IC701) for HP.
• MCLK: pin 1
• BCLK: pin 2
• DATA: pin 3
• LRCK: pin 4
• XRST: pin 5
If any of those signals is abnormal, connection
of the corresponding signal line may be loose or
the resistor, capacitor, UCOM (IC406) may be
defective. If all signals are normal, the DAC
(IC701) and its peripheral circuitry do not
function properly.
6
———
Loose connection
/defective parts
HPJK Assy
Identify the point where the audio signal is
interrupted on the line from JH101 to the
jacks (JA2601).
If audio signals is abnormal, connection of the
corresponding signal line may be loose or the
resistor, capacitor, jack terminal may be
defective.
Before checking through the table below, check if the settings of the PC application are correct.
0
Wrong input setting
of the application
installed on the PC
Input setting of the
application installed
on the PC
Check that the input setting of the
application installed on the PC is
appropriate.
The PC will not recognize the unit if the input
setting of the application installed on the PC is
inappropriate.
Operating instructions
0
Wrong input setting
of the application
installed on the PC
Input setting of the
application installed
on the PC
Check that the input setting of the
application installed on the PC is
appropriate.
The PC will not recognize the unit if the input
setting of the application installed on the PC is
inappropriate.
Operating instructions
1
Loose connection
/defective parts
MAIN Assy
Check the audio signal (HP_L/R), using
pins 5 and 7 of the JH101 on the MAIN
Assy.
If no audio signal is output, the MAIN Assy may
be defective. Go to [2].
If an audio signal is output, connection between
the HPJK and MAIN Assys may be loose,
connections inside the HPJK Assy may be loose,
or these Assys may be defective. Go to [6].
10.13 WAVEFORMS
AB
3
Loose connection
/defective parts
MAIN Assy
Check the audio input signal, using
pins 3 and 5 of the HP AMP (IC706).
Check the audio output signal, using
pins 1 and 7 of the HP AMP (IC706).
If the output signal is normal, connection of the
audio signal between HP AMP IC706 and
JH101 may be loose.
If the input signal is abnormal, connection of the
audio input signal line may be loose or the
resistor or capacitor may be defective.
If the input signal is normal but the output signal
is abnormal, go to [4].
———
2
———
MAIN Assy
Check the audio output signal, using
pins 10 and 11 of the HP DAC (IC701).
If an audio signal is output, go to [3].
If an audio signal is not output, go to [5].
———
Check if the MASTER OUT signal is normal, then if it is, check through this article.
1
Loose connection
/defective parts
MAIN Assy
Check the audio signal (MIC_IN), using
JA701 on MAIN Assy.
If no signal is output, the MIC jack or MIC cable
may be defective. If an signal is output,
connection of the corresponding signal line
may be loose or the resistor, capacitor,
OP amp, MIC volume ADC (IC708) may be defective.
———
2
Loose connection
/defective parts
MAIN Assy
Check the audio signal (MIC_ADC) on
MAIN Assy.
If no signal is output, connection of the
corresponding signal line may be loose or the
resistor, capacitor, OP amp, MIC volume, jack
terminal may be defective.If an signal is output,
the ADC (IC708) and its peripheral circuitry may
be defective.
———
3
Loose connection
/defective parts
MAIN Assy
Check the digital input signals to ADC
(IC708) for MIC.
• MCLK: pin 11
• BCLK: pin 12
• DATA: pin 9
• LRCK: pin 10
• XRST: pin 5
If any of those signals is abnormal, connection
of the corresponding signal line may be loose or
the resistor, capacitor, UCOM (IC406) may be
defective. If all signals are normal, the ADC
(IC708) and its peripheral circuitry do not
function properly.
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference
4
———
Mute signal
Loose connection
/defective parts
MAIN Assy
Check the level of the muting signal
(IC706 pin 2) for HP AMP.
Normally, the muting signal must be high
(Approx. 3.3 V, muting canceled). When it is low
(Approx. 0 V), muting is activated and no sound
is output. The signal line may be defective.
If the muting signal is high and normal, possibly
HP AMP is defective.
[5-2] The HEAD PHONE signal is not output.
[6] AUDIO IN
[6-1] The MIC INPUT signal is not output
