PDi PDI-P23LCD, Руководство по обслуживанию

Страница: 26 / 72

PDI-P23LCD SERVICE MANUAL
PAGE:
26
TROUBLE SHOOTING
No LED
LED blinking
Resistance:0 ohm
IC804 (pin4) <->
GND
Y
Replace
IC804 / D850
Y
Check
All SCL/SDA
SignalLevel
= 3.3V
Y
IC01(pin69~75)
ScalerCommuni
cation Lines)
= 3.3V
Y
Replace
IC101
N
Replace IC01
N
IC601(pin10)
= VCC24V
Y
Check
Another VCC Line
N
IC601(pin8)
= High=mute
= Low = on Y Check
SW751
Swich Off
N
IC101
(pin123,124 L/R)
Q104/105(Emmit
or)Sound Wave
N
Replace IC101
N
Y
Check
Volume
Volume UP
N
15-2. No Sound &
Picture OK
15-3. No Operation