Sharp LC-32LE280X - Page 34

LC-32LE280X/LC-40LE280X
4 – 5
Noaudio heard(2)
No external audioheard
IstheretheL-chaudiosignalinputfrompin(4)ofinputterminal
J502topin
(124)
ofIC3301?
IstheretheR-chaudiosignalinputfrompin(6)ofinputterminal
J502topin(
123
)ofI
C3301?
YES
IstheretheI2Ssignaloutputatpin(72,159,160,161)ofIC3301? CheckIC3301andits peripheralcircuits.
YES
ON
?2071CIfo
5,6,7,8)(niptatupnilangiserehtsI Checkconnection betweenIC3301andIC1702anditsperiph-
eralcircuits.
YES
IstheL-chaudiosignal outputatpin(8),(13)of
IC1702normal?
  NO CheckIC1702andits peripheralcircuits.
IstheR-ch audio signaloutputatpin(19), (23)of
IC1702normal?
YES
Are theaudiosignalL-chand R-choutputat(3)/(4) and(1)/(2)of
P1701 normal?
NO CheckcircuitbetweenIC1702 &P1701.
YES
Checkspeakers andtheirperipheralcircuits.
<INPUT3>
NO