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9 Diagnosis
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No.
Result
YES Go to No.1-3
NO
Go to No.1-2
YES Go to No.1-3
Q699
NO
Go to No.1-2
If voltage is 0V
during the power
switch is set to
ON.
If not 0V
If voltage is 0V
during the power
switch is set to
ON.
If not 0V
SW1000
If voltage of C738
is 3.3V
is 3.3V
R705
R706
R706
If lower than 3V
IC617
YES If voltage is 8-12V
NO
Main PCB
Q681
NO
If they show
soldered
completely
soldered
completely
R589
R584, R585
R501 ～R506
R584, R585
R501 ～R506
YES
IC605, IC606
IC616
IC616
9.2 MAIN UNIT DIAGNOSIS(2/2)
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No.
Result
YES Go to No.1-2
NO
Improper setting
YES
Device for which
the problem
occurred
the problem
occurred
NO
Main PCB
IC3
2 Date or Time cannot be
input.
Date and Time does not
change properly.
Date and Time are not
displayed.
Date and Time does not
change properly.
Date and Time are not
displayed.
2-1
Replace the Main PCB.
Main PCB
IC3
X2
RTC battery
3 Memory count is too large
or too small.
3-1
Replace the Main PCB.
Main PCB
IC4-11
IC2
1 When a device is
selected for "Boot Up
Drive", the system boots
from a different device.
Drive", the system boots
from a different device.
Component
1-1
Are there system files in the
device selected?
device selected?
1-2
Does the unit operate
normally after replacing the
problem device.
normally after replacing the
problem device.
No.
Symptom
Troubleshooting
procedures
Source of
problem
No power is sent to the
unit. (When using the
Battery Pack)
unit. (When using the
Battery Pack)
Is 8-12V applied to pins 1 of
Q681? (Whichever one)
Q681? (Whichever one)
1
Check soldered parts of
D666 ～ D668
D463 ～ D468.
D666 ～ D668
D463 ～ D468.
2-1
Power cuts off during
operation.
operation.
2
No power is sent to the
unit. (When using AC)
unit. (When using AC)
1-2
Is 15V applied to pins 1-3 of
Q710? (Whichever one)?
Q710? (Whichever one)?
YES
NO
1-5
Before setting the power
switch to ON, check voltage
on either side of SW1000 Is
Voltage 3.3V?
switch to ON, check voltage
on either side of SW1000 Is
Voltage 3.3V?
1-3
1-1
Is 15V applied to pins 5-8 of
Q699?
Q699?
9.1 MAIN UNIT DIAGNOSIS(1/2)
Source of
problem
Component
Troubleshooting
procedures
Symptom
No.
15
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