Sharp LC-45GD5U User Manual

45
LC-45GD5U
TROUBLE SHOOTING TABLE (Continued)
No sound comes out. (1)
YES
YES
YES
No audio output when receiving UHF/VHF
No audio output from external input
No audio output when receiving digital broadcasting
Are audio signals supplied to pins 56 (L-ch) and 57 (R-ch) of IC2501?
Is L-ch audio signal sent to pin 15 of IC3805?
Is R-ch audio signal sent to pin 11 of IC3805?
<<INPUT-1>>
Is L-ch audio signal supplied from pin 5 of input terminal J1101 to pin 13 of IC3805?
Is R-ch audio signal supplied from pin 2 of input terminal J1101 to pin 9 of IC3805?
<<INPUT-2>>
Is L-ch audio signal supplied from pin 6 of input terminal J1101 to pin 3 of IC3805?
Is R-ch audio signal supplied from pin 3 of input terminal J1101 to pin 7 of IC3805?
<<INPUT-3>>
Is L-ch audio signal supplied from pin 5 of input terminal J1106 to pin 1 of IC3805?
Is R-ch audio signal supplied from pin 2 of input terminal J1106 to pin 6 of IC3805?
<<INPUT-4>>
Is digital audio signal (HDMI_SPDIF) supplied from pin 78 of IC1912 to pin 43 of IC2702?
<<INPUT-5>>
Is L-ch audio signal supplied from pin 2 of input terminal J1900 to pin 5 of IC3805?
Is R-ch audio signal supplied from pin 3 of input terminal J1900 to pin 8 of IC3805?
NO
NO
YES
Is SIF output from the tuner (TU1101_Pin7)
normal?
Is input signal to pin 67 (SOUNDIF) of
IC2501(MULTI_SOUND_PROCESSOR) normal?
Check the tuner and its peripheral circuits.
Check the filer circuits (Q1145, Q1105-6) and
peripheral circuits.
NO
YES
Areaudio signals from pins 34 and 33
(SC2_OUTL/R) of IC2501 to pins 32 and 33 of
IC2702(DIR) normal?
Check between pins 34 and 33 (SC2_OUTL/R) of
IC2501 and pins 32 and 33 of IC2702 (DIR).
NO
YES
Are audio outputs (A-OUT_L/R) of pins 28 and 29
of IC2702 normal?
Are LRCK, BICK, SDTO and SDTI signals
supplied/sent from IC2702 to IC2700(DSP)
normally?
NO
YES
Is audio output from IC2502 normal?
YES
Is the speaker switching relay (RY2501) normal?
YES
Check the connector (SP_P2501) of AV_UNIT
and periphery of speaker.
Check IC2502 and its peripheral circuits.
YES
Check IC2702 and its peripheral circuits.
NO
YES
Is audio input from pins 28 and 29 of IC2702 to
pins 11 and 15 of IC2502 (STEREO_AMP)
normal?
Check circuits between pins 28 and 29 of IC2702
and pins 11 and 15 of IC2502. (MUTE
circuit:Q2515-7)
NO
NO
YES
Are audio signals supplied to pins 53 and 54
( SC2_IN_L/R)of IC2501?
Are analog audio signals supplied from the digital
unit to pins 14 and 12 of AV_UNIT connector (DA,
P1105)?
Check the digital unit.
Check between P1105 and IC2501.
YES

Sharp LC-45GD5U Specifications

General

Brand	Sharp
Model	LC-45GD5U
Category	LCD TV
Language	English