Sharp Aquos LC-32GD4U, Руководство по обслуживанию

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42
LC-32GD4U
LC-37GD4U
TROUBLE SHOOTING 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/TU1
102_Pin7)
Are the audio outputs (A-OUT_L/R) from pins (28) and (29) of IC2702 as specified? Are the audio outputs from pins (28) and (29) of IC2702 to pins (13) and (15) of P3801 (1-bit amplifier input) as specified? Is the signal from the 1-bit amplifier inputted to each terminal of P6003? Is relay normally switched from P6003 on the
A
V
PWB to R
Y6001 (speaker switching)?
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) and pin (69) (SOUNDIF2) of IC2501 (MUL
TI_SOUND_PROCESSOR) as specified?
Check
TU1
101/1
102 (UV 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 (3) of IC3805? Is the R-ch audio signal outputted to pin (3) of IC3812? <INPUT
-1>
Is the L-ch audio signal inputted from pin (8) of input terminal J1
101 to pin (14) of IC3805?
Is the R-ch audio signal inputted from pin (2) of input terminal J1
101 to pin (14) of IC3812?
<INPUT
-2>
Is the L-ch audio signal inputted from pin (6) of input terminal J1
101 to pin (15) of IC3805?
Is the R-ch audio signal inputted from pin (3) of input terminal J1
101 to pin (15) of IC3812?
<INPUT
-3>
Is the L-ch audio signal inputted from pin (8) of input terminal J1
102 to pin (1) of IC3805?
Is the R-ch audio signal inputted from pin (4) of input terminal J1
103 to pin (1) of IC3812?
<INPUT
-4>
Is the digital audio signal (HDMI_AMCLK) inputted from pin (29) of IC1912 to pin (43) of IC2702? <INPUT
-5>
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 (3) of input terminal J1900 to pin (5) of IC3812?
Check the peripheral circuits of filter circuits (Q1
145, Q1
105-6) (Q1
1
10, Q1
1
17-8).
Check IC2702 and its peripheral circuits. Check the 1-bit amplifier and its peripheral circuits. Check the lines from pins (28) and (29) of IC2702 to pins (13) and (15) of P3801 (1-bit amplifier input).(IC3802, Q3805-6) Are signals LRCK, BICK, SDT
O and SDT
O
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.