Sharp Aquos LC 26D7U, Service Manual, Page: 51 / 214

51
LC-26D7U
LC-32D7U
LC-37D7U
TROUBLE SHOOTING TABLE
(Continued)
YES YES YES YES YES
NO NO NO NO
No monitor audio output when receiving digital broadcasting Does IC5708 (AUD_AMP) function well?
Check the digital unit. Check IC5704 and its peripheral circuits.
NO
Check between P3101 and IC1
108.
(Q1
107, Q1
108, etc.)
Check IC5708 and its peripheral circuits. Check from the connector (DS, P3101) of A
V_UNIT
to the periphery of IC5704.
Is digtal audio signal supplied from the digital unit to pins (4) and (7) of
A
V_UNIT
connector (DS,
P3101)? Are the analog-converted audio signals outputted to output terminal pins (1
1) and (8) of IC5704?
Are audio signals supplied to the input terminal pins (1)/(4) and (1
1)/(12) of IC1
108?
Are signals I2SLRCLK, I2CDA
T
A, I2SSCLK and
AUDMCLK inputted to the input terminals (pins (1) to (4)) of IC5704 (DAC)?
NO YES NO NO NO
YES NO YES YES YES
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? Are audio output pins (3) and (13) of IC1
108 as
specified? Check the line from IC1
108 to the MONIT
OR
OUTPUT
(J1
106) terminal.
Are the audio signals inputted to input terminal pins (2) and (5 ) and pins (14) and (15) of IC1
108
(AUDIO_SW)? 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. Check the line from IC2504 to IC1
108.
Check IC1
108 and its peripheral circuits.
Is the control signal inputted to pin (10) of IC1
108
as specified?