Sharp Aquos LC-32LE600E, Manual

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LC-32/40/46LE600E/RU/S
5 – 5
No sound (1-1) (during the reception of TV broadcasting)
No audio output during UHF/
VHF reception
Checklist:
1) Is the volume set to MIN or MUTE on the remote control?
•••
Set the desired volume.
2) Is ANT-CABLE disconnected or connected improperly?
•••
Connect it correctly as per the operation manual.
3) Attention: The terminal of IC3303 (VCT) cannot be actually checked by hiding oneself, and check it with another terminal of the same line,
please.
(MAIN-UNIT) (TUNER SIDE)
Is the audio signal
(AOUT_SP_L/R) output from
pins (H26) and (H25) of
IC3303 (VCT)? NO Is the audio signal (SIF)
input to pin (AB25) of
IC3303 (VCT)? YES Check whether there are a
power supply of IC3303
(VCT), the short circuit,
and other abnormalities.
(MAIN-UNIT) YES
NO
Is the audio signal
(SPKOUT_L/R) output form
pins (17) and (18) of
IC1302 (A-SW) normally? NO Check S9V power supply
(10) (15) pin, D3.3V
power supply (3) (36)
pin, and AUSW-MUTE
signal (29) pin of IC1302
(A-SW) or the peripheral
circuits. Is the SIF signal output
from pin (4) of tuner
(TU1102)? YES Check whether there are
open-circuit or short-cir-
cuit between tuner
(TU1102) and IC3303.
YES NO
Is the audio signal (LCH
±
/
RCH
±
) output form pins
(31)/(27) and (11)/(14) of
IC2701 (A-AMP) normally?
NO Check AMP12.5V power
supply (1) (10) pin, AMP-
STBY input signal (17)
pin, and audio-mute sig-
nal pin (19) of IC2701 (A-
AMP) or the peripheral
circuits. Check whether IF5V
power supply is sup-
plied to pin (3) of tuner
(TU1102), and ANT5V
power supply is sup-
plied to pin (1) of tuner
(TU1102)? NO Check whether there are
open-circuit or short-cir-
cuit between tuner
(TU1102) and Q1105 (5V-
REG) or between tuner
and IC1101.
YES YES
Is the audio output signal
outputted to pins (1)-(4) of
SP-Connector (P2701) nor-
mally? NO Check SP- Connector
(P2701) and peripheral
circuits. Check whether the I2C
signal (SDA/SCL) is
functioning by (9) (8)
pin of tuner (TU1102). NO Pursue an I2C line and
look for the part of an
open circuit or the short
circuit.
YES YES
Is the SP-Wire harness
connected and operated
orthopedically normally? NO Correct an abnormal part
of SP- harness. Check whether IF_AGC
is functioning between
pin (E24) of IC3303 and
pin (15) of tuner
(TU1102) NO Check whether there is an
open circuit or the short
circuit in an IF_AGC sig-
nal line.
YES YES
Check right and left SP-
BOX, and exchange defec-
tive SP-BOX
(R: RSP-ZA392WJZZ/
L: RSP-ZA391WJZZ) A-BLOCK Replace tuner
(TU1102).