Sharp Aquos LC 45GD5U, Руководство по обслуживанию

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46
LC-45GD5U
TROUBLE SHOOTING TABLE
(Continued)
No sound comes out. (2)
No monitor audio output
YES NO
NO
Is the audio output of monitor output set to "V
ariable"?
Are audio output pins 37 and 36 (SC1_OUT_L/R) of IC2501 (MUL
TI_SOUND_PROCESSOR)
normal?
Reset the audio output of monitor output to "Fixed". Check IC2501and its peripheral circuits.
NO
Are audio output pins 7 and 1 of IC2504 (EQ_AMP) normal?
Check IC2504 and peripheral circuits.
NO
YES
YES
YES
Are audio signals supplied to input terminal pins 2 and 5 and pins 14 and 15 of IC1
108
(AUDIO_SW)?
Check between IC2504 and IC1
108.
NO
YES
YES
Are audio output pins 3 and 13 of IC1
108 normal?
YES
Is control signal supplied to pin 10 of IC1
108
normal?
Check between IC1
108 and MONIT
OR OUTPUT
terminal (J1
106)?
Check IC1
108 and its peripheral circuits.
No monitor audio output when receiving digital broadcasting
NO NO
YES
Are digital audio signals supplied from the digital unit to pins 10-13 of
A
V_UNIT
connector
(FC_SC5401)? Are signals I2SLRCLK, I2CDA
T
A, I2SSCLK and
AUDMCLK supplied to pins 1-4 of IC5402(DAC)?
Check the digital unit. Check between the connector (FC_SC5401) of A
V_UNIT
and the periphery of IC5704.
NO
Are analog-converted audio signals sent to output terminal pins 1
1
and 8 of IC5402?
Check IC5402 and its peripheral circuits.
NO
YES YES
Does IC5401(AUD_AMP) function well?
Check IC5401and its peripheral circuits.
NO
YES
Are audio signals supplied to the input terminal pins 1 and 4 and pins 1
1
and 12 of IC1
108?
Check between IC5401 and IC1
108.
(Q1
107, Q1
108, etc.)