31
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TROUBLESHOOTING TABLE (Continued)
NO
YES
Check power supply and pins (9) and (10)of IC2704(SW) and
audio signal input of pins (4) and (11) of IC2704.
Check Q4601... Q4607 and their peripheral circuits.
NO
Check R272 and R273.
Are scrambled images not displayed?
YES
No video output during DTV reception. Colors of Images are not right.
NO
DIGITAL UNIT:
Is audio signal fed to pins (5) and (10) of IC4604 (OP-AMP)?
Are video signals (R/G/B,CVBS) send from the
C4636/C4637/C4638 and emitters of Q4607?
Check power supply and pin (1) of IC2705(SW).
NO
YES
MAIN UNIT:
Is video signal (CVBS) sent from pin (2) of IC2705(SW).
YES
Are video signals (R/G/B,CVBS) fed from pins (179),(180),(181)
and (184) of IC3002?
YES
NO
MAIN UNIT:
Is audio signal sent to pin (3) and (13) of IC2704 (SW)?
YES
Is audio signal sent from pins (7) and (8) of IC4604(OP-AMP)?
Check R4002(AD2pin) and IC4001(D-Processor).
Check power supply of IC4604(OP-AMP) and its peripheral circuits.
NO
YES
NO
YES
No audio output during DTV reception. Sound is low.
D-TUNER UNIT:
Is data FED[0:7] sent from pins (3),(4),(5),(6),(8),(9),(10) and (11)
of P202?
DIGITAL UNIT:
Check 5V output of pin (1) of IC4702.
Check 5V of pin (6) of Q4401.
NO
YES
Check R4011(AC8pin),R4013(AC9pin) and IC4001(D-Processor).
DIGITAL UNIT:
Are video signals (R/G/B,CVBS) sent from
C4639/C4640/C4641/C4625?
28
LC-32/37GD8E/RU
LC-32/37BT8E/RU
No sound from external input devices (2)
No sound from an external
input device connected to
EXT1 (SCART1).
No sound from an external
input device connected to
EXT2 (SCART2).
No sound from an
external input device
connected to EXT3.
No sound from EXT4
(AUDIO) connecting an
external input device.
No sound from EXT5
(AUDIO) connecting an
external input device.
YES
<EXT1>
Is IN1-L audio signal sent
from pin (6) of SCART1
terminal (J1101) to pin
(14) of IC3002 (VCT)?
Is IN1-R audio signal sent
from pin (2) of SCART1
terminal (J1101) to pin
(13) of IC3002 (VCT)?
<EXT2>
Is IN2-L audio signal sent
from pin (27) of SCART2
terminal (J1101) to pin
(12) of IC3002 (VCT)?
Is IN2-R audio signal sent
from pin (23) of SCART2
terminal (J1101) to pin
(11) of IC3002 (VCT)?
<EXT3>
Is IN3-L audio signal
sent from pin (3) of
J1201 terminal to pin
(16) of IC3002?
Is IN3-R audio signal
sent from pin (5) of
J1201 terminal to pin
(15) of IC3002?
Is the audio signal
properly sent from pins
(28) and (27) of IC3002?
Check IC3002 or
peripheral circuits.
Is the audio signal of
pins (1) and (7) of IC303
(OP-AMP) sent properly?
Check IC303 or
peripheral circuits.
<EXT4>
Is D-SUB-L audio signal
sent from J2702 to pin
(15) of IC2704?
Is D-SUB-R audio signal
sent from J2702 to pin
(2) of IC2704?
Is D-SUB-L audio signal
sent to pin (10) of
IC3002?
Is D-SUB-R audio signal
sent to pin (9) of
IC3002?
<EXT5>
Is HDMI-L audio signal
sent from J2701 to pin
(14) of IC2704?
Is HDMI-R audio signal
sent from J2701 to pin
(5) of IC2704?
Check pins (6) and
(2) of SCART1 and
connection to an
external input
device.
Check pins (27) and
(23) of SCART2 and
connection to an
external input
device.
Check pins 3
(J1201) and 5
(J1201) of EXT3
and connection to
an external input
device.
Is HDMI-L audio
signal sent to pin
(10) of IC3002?
Is HDMI-R audio
signal sent to pin (9)
of IC3002?
Is the audio output
signal of pins (13) and
(16) of IC302/IC301
(MAIN-AMP) normal?
Check IC302/IC301
(MAIN-AMP),
HEADPHONE and
peripheral circuits.
Check CONNECTOR
(P301) and Speaker
(right and left).
YES
YES
NO NO
Check output of pins
(13) and (3) of
IC2704 and
peripheral circuits.
NO
Check that Option-
HDMI Setup-Audio
select is set to
"Analog".
YES YES
YES
OK
NOYES
YES
YES
NO
YES
NO
NO
TROUBLESHOOTING TABLE (Continued)
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