Pioneer DDJ-T1 Service Manual page 29

5
[5-2] No signal is output from the HP connector
No. Cause/Symptom Point to be checked
1 — UCOM Assy
2 — UCOM Assy
Loose connection
3 UCOM Assy
/defective parts
Loose connection
4 UCOM Assy
/defective parts
Loose connection
5 HPJK Assy
/defective parts
[6] AUDIO IN
[6-1] The input signal to AUX/MIC is not output.
No. Cause/Symptom Point to be checked
Prior confirmation
of input
0 AUX/MIC
TRAKTOR setting
AC adaptor connection
1 — AUX/MIC
Loose connection
2 UCOM Assy
/defective parts
Loose connection
3 UCOM Assy
/defective parts
Loose connection
4 UCOM Assy
/defective parts
Loose connection
5 UCOM Assy
/defective parts
Loose connection
6 UCOM Assy
/defective parts
Loose connection
7 JACB Assy
/defective parts
Loose connection
8 MICB Assy
/defective parts
Loose connection
9 UCOM Assy
/defective parts
Loose connection
10 UCOM Assy
/defective parts
5
6
Item to be checked
Check the audio signal, using Pins 3 and 5
of the CN301 on the UCOM Assy.
Check that the audio signal is output from
DAC (IC304).
Check the digital input signals to DAC
(IC304).
• DAC_RST (IC304-5 pin)
• HP_DATA (IC304-3 pin)
Identify the point where the audio signal is
interrupted on the line from DAC (IC304) to
the CN301.
Identify the point where the audio signal is
interrupted on the line from CN4801 to
the JA4801.
Item to be checked
Check that the TRAKTOR input setting is properly
made. Check that the AC adaptor is properly
connected. (When USB-bus power is used, the
signal input to AUX/MIC is not available.)
Identify the connector(s) whose input
signal(s) is(are) not output.
Check that the audio signal is input to the
ADC (IC303).
Check the digital input signals to ADC
(IC303).
• ADC_RST (IC303-13 pin)
• MIC_AUX_DATA (IC303-1,2 pins)
Check the connections of the USB_UCOM
(IC202).
Check that the AIN_MUTE signal level is L
(muting canceled).
Check the connections between the SW AMP
(IC301/IC302) and ADC (IC303) of the MAIN.
Check that an audio signal is input to Pins 4
and 6 of the CN4402.
Check that an audio signal is input to Pin 4
of the CN4601.
Check the connections between CN302
(AUX)/CN303 (MIC) and SW AMP (IC301
/IC302).
Check AUX_MIC_SEL.
• When AUX is selected: "H"
• When MIC is selected: "L"
DDJ-T1
6
7
How to distinguish a defective point and/or corrective action
If no audio signal is output, loose connection or de-
fective parts in the UCOM Assy may be suspected.
• If an audio signal is output, go to [5].
• If an audio signal is not output, go to [2].
• If an audio signal is output, go to [4].
• If an audio signal is not output, go to [3].
For DAC_RST, check the soldering status of DAC
(IC304). If the HP_DATA signal is not input, check
the connections of the USB_UCOM (IC202).
If nothing is wrong with the connections, then the
USB_UCOM (IC202) itself may be defective.
If the audio signal is interrupted at the periphery of
the OP amp (IC305), soldering of the OP amp or the
OP amp itself may be defective.
If the audio signal is interrupted at the periphery of
the OP amp (IC4801), soldering of the OP amp or the
OP amp itself may be defective.
How to distinguish a defective point and/or corrective action
Check if the signal can be input neither AUX nor MIC
or either of them.
• If neither of them can receive signals, go to [2].
• If only the AUX connector cannot receive signals, go to [7].
• If only the MIC connector cannot receive signals, go to [8].
• If an audio signal is output, go to [3].
• If an audio signal is not output, go to [5].
If the level of ADC_RST is L, check the connections
of the MAIN_UCOM (IC701). If nothing is wrong with
the connections, then the MAIN_UCOM (IC701)
itself may be defective.
If the MIC_AUX_DATA signal is not input, check the
connections. If nothing is wrong with the connections,
then the ADC (IC303) may be defective.
If nothing is wrong with the connections, then solder-
ing of the USB_UCOM (IC202) or the USB_UCOM
itself may be defective.
If it is not L (muting canceled,) check Q509. If the
symptom persists, soldering of the MAIN_UCOM
(IC701) or the MAIN_UCOM itself is defective.
If the connections are properly made, soldering of the
SW AMP (IC301/IC302) or the SW AMP itself is defective.
If a signal is input, go to [9].
If a signal is not input, identify the point where the audio
signal is interrupted on the line from the AUX terminal
(JA4401) to the CN4402.
If an audio signal is interrupted at the periphery of the
OP amp (IC4401/IC4402), soldering of the OP amp or
the OP amp itself may be defective.
If a signal is input, go to [9].
If a signal is not input, identify the point where the audio
signal is interrupted on the line from the MIC terminal
(JA4601) to the CN4601.
If an audio signal is interrupted at the periphery of the
OP amp (IC4601), soldering of the OP amp or the OP
amp itself may be defective.
If the connection is improperly made, correct it.
If it is not, check Q301. If the symptom persists,
soldering of the MAIN_UCOM (IC701) or the MAIN_
UCOM itself is defective.
7
8
A
Reference
10.3 UCOM
ASSY (2/6)
10.3 UCOM
ASSY (2/6)
10.3 UCOM
ASSY (2/6)
B
10.3 UCOM
ASSY (2/6)
10.14 HPJK
ASSY
Reference
C
Operating
Instructions
10.3 UCOM
ASSY (2/6)
10.3 UCOM
ASSY (2/6)
10.3 UCOM
ASSY (2/6)
10.17 WAVEFORMS
D
ADC reset cncel
Z
ADC I2S(1),(2),(3)
,
10.2 UCOM
ASSY (1/6)
10.4 UCOM
ASSY (3/6)
10.17 WAVEFORMS
Input MUTE cancel $
10.3 UCOM
ASSY (2/6)
E
10.1 JACB
ASSY
10.13 MICB
ASSY
10.3 UCOM
ASSY (2/6)
F
10.3 UCOM
ASSY (2/6)
10.17 WAVEFORMS
MIC,AUX No. )
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