15
DJS-1000
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Display Trouble
LED is not lit
Is there more than one
abnormal LED display?
Are all LEDs that are controlled
with the same GRID signal abnormal?
Yes
Yes
Yes
Are all LEDs that are controlled
with the same
S
EG signal abnormal?
Identify the abnormal part in the
"6.1 TE
S
T MODE"
Failure in the LED, high-side drive circuit
Failure in the LED, low-side drive circuit
Failure in IC
3
600, IC
3
601, IC
3
602
and peripheral circuit
Failure in IC2000 and peripheral circuit
Failure in the LCD (CWX4
3
52)
Failure in the LEDs for the abnormal part
and peripheral circuit
Failure in the LED control microcomputer
(IC
8
005)or failure in the LED, high-side
drive circuit
Failure in the LED control microcomputer
(IC
8
005) or failure in the LED, low-side
drive circuit
No
No
No
LCD does not display / LCD display is abnormal
Yes
Is the target GRID signal normal?
[Observation point
,
waveform 2
]
No
No
Is the target
S
EG signal normal?
[Observation point
@
,
waveform
3
]
Yes
Yes
Yes
Is the RGB666 signal normal?
[Observation point
Q
R
"
=
, waveform 6
]
Yes
Yes
No
Failure in IC
3
400 and peripheral circuit
No
No
Failure in the LEDs for the abnormal part
and peripheral circuit
Is the voltage of
BL_A(V+10_BL) normal?
*1
[Observation point
>
]
No
Failure in IC402 and peripheral circuit
Failure in IC2000 and peripheral circuit
Yes
Is the LCD_PWM signal normal?
[Observation point
S
,
waveform 4
]
No
Yes
Is the V+1
8
LCD, V+9R6LCD,
V-6LCD voltage normal?
*1
[Observation point
Y
G
T
]
*1: Refer to 10.
3
2 VOLTAGE
S
/ WAVEFORM
S
(QRT101
8
S
ERVICE MANUAL)
Is the LVD
S
signal normal?
[Observation point
V
[
W
K
, waveform 5
]
