22
DDJ-ERGO-V
1
2
3
4
A
B
C
D
E
F
1
2
3
4
7
10.13
W
A
V
EFORMS
bcdlvw
Loose connection
/defective parts
IFP
W
Assy
Check the digital input signals to DAC
(IC502) for HP.
• MCLK: pin 1
• BCLK: pin 2
• MASTER_DATA: pin 3
• LRCK: pin 4
• ADC_DAC_XRST: pin 5
If any of those signals is abnormal, connection
of the corresponding signal line may be loose or
the resistor, capacitor, USB Controller (IC102),
or MAI
N
UCOM (IC1002) may be defective.
8
———
Loose connection
/defective parts
HPJK Assy
Identify the point where the audio signal is
interrupted on the line from JH1901 to the
jacks (JA1901/JA1902).
The audio signal may be interrupted by a loose
connection of the signal line or by a defective
resistor, capacitor, or jack.
6
10.12
V
OLTAGES
Mute signal
Loose connection
/defective parts
IFP
W
Assy
Check the level of the muting signal for the
HP AMP at Pin 2 of IC504.
The level must be high (muting canceled) in
normal state.
W
hen it is low, muting is activated
and no sound is output. The muting signal level
becomes high, possibly because connection of
the corresponding P
W
R_O
N
signal line is loose.
If the muting signal level is high (normal,) the
HP AMP may be defective.
[5-2] The HEAD PHONE signal is not output.
0
W
rong 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 IFP
W
Assy
HPLC Assy
HPJK Assy
Check the connections between the
IFP
W
Assy and HPLC Assy, and between
the IFP
W
Assy and HPJK Assy.
If normal, go to [2].
———
2
Loose connection
/defective parts
IFP
W
Assy
Check the audio signal (HP_L/R), using
pins 3 and 5 of the C
N
103 on the IFP
W
Assy.
If no audio signal is output, connection between
the IFP
W
and HPLC Assys may be loose or
these Assys may be defective. Go to [3].
If an audio signal is output, connection between
the IFP
W
and HPJK Assys may be loose,
connections inside the HPJK Assy may be loose,
or these Assys may be defective. Go to [
8
].
10.13
W
A
V
EFORMS
BC
3
Loose connection
/defective parts
IFP
W
Assy
HPLC Assy
Check the voltages, using pin 1 (
V
+5_HP),
pin3 (
V
+5_HP_OUT) of the C
N
104 on the
IFP
W
Assy .
The normal voltage level is approximately 5
V
.
If the voltage is abnormal, the HPLC Assy may
be defective, connection of the
V
+5_HP and
V
+5_HP_OUT lines on the IFP
W
Assy may be
loose, or a connection IC (5
V
REG IC305,
DAC IC502 for HP, HP AMP IC504, etc.) may be
defective.
If the voltage is normal, go to [4].
10.12
V
OLTAGES
ef
5
Loose connection
/defective parts
IFP
W
Assy
Check the audio input signal, using
pins 3 and 5 of the HP AMP (IC504).
Check the audio output signal, using
pins 1 and 7 of the HP AMP (IC504).
If the output signal is normal, connection of the
audio signal between HP AMP IC504 and
C
N
103 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 [6].
———
4
———
IFP
W
Assy
Check the audio output signal, using
pins 10 and 11 of the HP DAC (IC502).
• If an audio signal is output, go to [5].
• If an audio signal is not output, go to [7].
10.13
W
A
V
EFORMS
BC
No.
Cause
Diagnostics Point
Item to be Checked
Corrective Action
Reference