17
DJS-1000
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Audio Trouble
Failure in the sensor IC (IC2000)
Failure in the operation processing
microcomputer (IC2000)
or failure in the sensor IC (IC7700)
Touch strip does not work
Is iMX_CDC_Pcon set to the HI level?
[Observation point
I
]
Does CDC_INT become
the LOW level when touched?
[Observation point
H
,
6
waveform
8
]
No
No
No
Yes
Failure in the sensor IC (IC7700)
or failure in the transistor (Q
8
005)
Yes
Yes
No
Failure in the operation processing
microcomputer (IC2000) or failure in the
buffer IC (IC7701, IC
8
001, IC
8
002)
Replace the FFC
Touch panel does not work / misalignment occurs
Is the symptom a positional
misalignment?
Is there a failure in the FFC?
No
Yes
Yes
Failure in the processing microcomputer (IC
8
00
8
)
or failure in the touch panel peripheral circuit(Transistor etc. )
Failure in the touch panel
Failure in the touch panel peripheral circuit(Transistor etc. )
Failure in the touch panel
Is V+
3
R
3
D that is supplied
to the sensor IC normal?
*1
[Observation point
F
]
*1: Refer to 10.
3
2 VOLTAGE
S
/ WAVEFORM
S
(QRT101
8
S
ERVICE MANUAL)
No sound comes out when an input is supplied to the INPUT terminal
[Prior Confirmation]
(1) Confirmation of the internal wiring materials
Confirm that the wiring materials of the relevant parts are inserted properly. Also, confirm that there is no disconnection in the wiring materials.
Inset the wiring materials properly if they are not. Or, replace the wiring materials if they are disconnected. (
S
ee overall wiring diagram)
(2) Confirmation of the power supply
Confirm that the voltage of the power supply that is used in the part to be diagnosed is not abnormal.
If it is abnormal, identify the power generation source based on the power supply map and make the necessary repairs.
(
3
) Confirmation of the reset signal
Confirm that the reset signal of the IC that is used in the part to be diagnosed is Hi (Released).
If it is abnormal, identify the reset signal generation source based on the circuit diagram and make the necessary repairs.
(4) Confirm that there is no problem in the display/ operation systems
Confirm that there is no problem in the displays/ operations in the test mode.
If a problem is found, make the necessary repairs on the target part. (
S
ee Display Trouble and Operation Trouble flow charts)
Activate it in the normal mode and supply the audio signal to the INPUT terminal
Adjust the INPUT LEVEL knob to the appropriate position
S
et the TRACK TYPE of least one track in the THRU
Adjust the TRACK VOLUME of track that is set in the THRU to the 100
A
