9
TROUBLE SHOOTING GUIDE
A-3. CHECKING THE DC - INPUT CIRCUIT.
B. LED DISPLAY CIRCUIT.
Do not turn on the front
DISPLAY
YES
Check the polarity of
DC adaptor
NO
Change the DC adptor
YES
Is Vcc input at pin1 of
IC803?
NO
Check JK801 and pattern
YES
Check SERVO/SYSCON
circuit
NO
Is 1.25V input at pin4 of
IC803?
NO
Check R805, R806 and
R807
YES
Check SERVO/SYSCON
circuit
LED does not operate
properly.
NO
Is +5.1V supplied from
D510 cathod to L701?
NO
Check power module
YES
Is +5.1V supplied to the
collectors of Q701~Q706?
NO
Check L701
YES
Are the signals supplied
from u-com to the bases
of Q701~Q706?
NO
Check u-com
YES
Are the signals supplied
from u-com to the bases
of Q707~Q713?
NO
Check u-com
YES
Are the signals supplied
To the LED(G701)?
NO
Check Q701~ Q713 and
patterns
YES
Check G701 and pattern
Содержание DV-S123W Series
Страница 33: ...32 PRINTED CIRCUIT BOARD 1 PCB MAIN ...
Страница 34: ...33 PRINTED CIRCUIT BOARD 2 PCB POWER SMPS ...
Страница 35: ...34 CIRCUIT DIAGRAM 1 CONNECTION DIAGRAM DV S103W S103A S103N ...
Страница 36: ...35 CIRCUIT DIAGRAM 2 POWER CIRCUIT DV S103W ...
Страница 37: ...36 CIRCUIT DIAGRAM 3 SERVO SYSCON CIRCUIT DV S103W ...
Страница 38: ...37 CIRCUIT DIAGRAM 4 AV INPUT OUTPUT CIRCUIT DV S103W ...
Страница 39: ...38 CIRCUIT DIAGRAM 5 VIDEO AUDIO CIRCUIT DV S103W S103A S103N S103S ...
Страница 40: ...39 EXPLODING VIEWS PARTS LIST 1 PACKING AS ...
Страница 41: ...40 EXPLODING VIEWS PARTS LIST 2 SET TOTAL ASSEMBLY ...
Страница 42: ...41 EXPLODING VIEWS PARTS LIST 3 FRONT PANEL ASSEMBLY DV S103W FRONT PANEL ASSEMBLY ...
Страница 43: ...42 EXPLODING VIEWS PARTS LIST DV S123W FRONT PANEL ASSEMBLY ...