Sharp LC-52XS1E Service Manual page 52

LC-52XS1E/RU/LC-65XS1E/RU
No audio output from SP
Checklist
1) Is the volume set to MIN or MUTE on the remote control? • • • Set the desired volume.
2) Is the ANT-CABLE and the HDMI terminal disconnected or connected improperly? • • • Connect it correctly as per the operation manual.
3) In repair, an external input may be carried out and the standard signal of 1080P (60Hz) containing an audio signal may be checked.
(IF-UNIT)
Check whether each terminal of SP terminal (P6901) is struck by bits of metal,
and sound appears in Speaker.
(IF-UNIT)
Check whether the L/R audio signal is outputted from IC6902 (1 bit-AMP).
L-CH: 1-6pin, RCH: 31-36pin
Check whether the audio signal is outputted from IC6951 (SUB-P-AMP).
SW (+): 15-17/44-46pin,
SW (-): 20-22/39-41pin
Is the DAC_A_OUT signal output in (59) pin of IC6804 (S-DSP)
and is the SP_L/R_POS signal output to (62) (61) pin?
Is the FPGA_DATA/CLK signal input in (26-29) pin of IC6804 (S-
DSP) and is the SUB_DATA/CLK signal input to (30-33) pin?
It seems that abnormalities are between IC7103 (FPGA), IC6201
(DECODER), and the HDMI input. Please return in front.
Is the difference input signal (RX [0:C] ±) input to [25-35] pin of
IC6004 (TMDS-SW) normally?
Is the signal of IC6102 (HDMI_RX) and IC6052 (LVDS_TX) out-
putted normally?
Is differential output signal of IC6201 (DECODER) outputted nor-
mally?
Check the power supply and soldering of IC7103 (FPGA).
Or please exchange it.
YES
NO
NO
NO
YES
YES
YES
No sound-2
YES Check the input line, the power supply, the MUTE line, and sol-
dering of IC6902 (1bit-AMP) and IC6951 (SUB-P-AMP).
YES Check the I2C signal, X-TAL (X6801), the power supply, and sol-
dering of IC6804 (S-DSP).
NO Check the power supply and soldering of IC6102 (HDMI_RX)
and IC6052 (LVDS_TX).
NO Check the power supply and soldering of IC6201 (DECODER).
Or please exchange it.
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