33
LC-26DA5U
LC-32DA5U
TROUBLESHOOTING TABLE
(Continued)
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
No sound comes out.
(1)
No sound comes out at UHF/VHF reception.
Is the SIF output from the tuner as
specified?(TU1
101_Pin7)
Are the audio outputs (A-OUT_L/R) from pins (28)
and (29) of IC2702 as specified?
Is the audio input from pins (28) and (29) of
IC2702 to pins (1
1) and (15) of IC2502 (STEREO
AMP) normal?
Is the audio output from IC2502 normal?
Is the speaker switching relay (R
Y2501) normal?
YES
Check the connector (SP_P2501) of
A
V_UNIT
and
periphery of speaker
.
Are the audio signals from pins (34) and (33)
(SC2_OUTL/R) of IC2501 to pins (32) and (33) of
IC2702 (DIR) as specified?
Is the input signal to pin (67) (SOUNDIF1) of
IC2501 (MUL
TI_SOUND_PROCESSOR) as
specified?
Check tuner and its peripheral circuits.
No external input sound comes out.
Are the audio signals inputted to pins (56) (L-ch) and (57) (R-ch) of IC2501?
Is the L-ch audio signal outputted to pin (15) of IC3805?
Is the R-ch audio signal outputted to pin (1
1) of IC3805?
<INPUT
-1>
Is the L-ch audio signal inputted from pin (5) of input terminal J1
101 to pin (13) of IC3805?
Is the R-ch audio signal inputted from pin (2) of input terminal J1
101 to pin (9) of IC3805?
<INPUT
-2>
Is the L-ch audio signal inputted from pin (6) of input terminal J1
101 to pin (3) of IC3805?
Is the R-ch audio signal inputted from pin (3) of input terminal J1
101 to pin (7) of IC3805?
<INPUT
-3>
Is the L-ch audio signal inputted from pin (5) of input terminal J1
106 to pin (1) of IC3805?
Is the R-ch audio signal inputted from pin (2) of input terminal J1
106 to pin (6) of IC3805?
<INPUT
-4>
Is digital audio signal (HDMI_SPDIF) sent from pin (78) of IC1912 to pin 43 of IC2702?
(Analog audio mode)
Is the L-ch audio signal inputted from pin (2) of input terminal J1900 to pin (5) of IC3805?
Is the R-ch audio signal inputted from pin (4) of input terminal J1900 to pin (8) of IC3805?
Check the peripheral circuits of filter circuits
(Q1
145, Q1
105-6).
Check IC2702 and its peripheral circuits.
Check IC2502 and its peripheral circuits.
Check circuits from pins (28) and (29) of IC2702 to
pins (1
1) and (15) of IC2502. (MUTE circuit:
Q2515-7)
Are signals LRCK, BICK, SDT
O and SDTI
inputted/outputted from IC2702 to IC2700 (DSP)
normally?
Check the lines from pins (34) and (33)
(SC2_OUTL/R) of IC2501 to pins (32) and (33) of
IC2702.
NO
NO
YES
YES
No monitor audio output comes out.
Are audio output pins (37) and (36)
(SC1_OUT_L/R) of IC2501 (MUL
TI_SOUND_
PROCESSOR) as specified?
Is the audio output of monitor output set to
"V
ariable"?
Reset the audio output of monitor output to
"Fixed".
Check IC2501 and its peripheral circuits.
NO
YES
Check the line from IC2504 to the MONIT
OR
OUTPUT
(J1
106) terminal.
Are audio output pins (7) and (1) of IC2504
(EQ_AMP) as specified?
Check IC2504 and its peripheral circuits.
NO
YES
NO
YES
NO
YES
YES
No sound comes out.
(2)
Are audio output pins (37) and (36)
(SC1_OUT_L/R) of IC2501 (MUL
TI_SOUND_
PROCESSOR) as specified?
Are audio output pins (7) and (1) of IC2504
(EQ_AMP) as specified?
Check the line from IC1
108 to the MONIT
OR
OUTPUT
(J1
106) terminal.
No monitor audio output comes out.
Is the audio output of monitor output set to
"V
ariable"?
Check IC2501 and its peripheral circuits.
Reset the audio output of monitor output to
"Fixed".
Check IC2504 and its peripheral circuits.
