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No sound from AUDIO OUT (J506). (MONITOR OUT)
Is the audio output signal send to pins (2) and (4) of the AUDIO
OUT terminal (J506)?
Is the AUDIO-MUTE "L" signal input to pins (5) and (2) of Q509
base?
Is the audio output signal (MONITOR_OUT_L/R) output from
pins (19) and (20) of IC1302 (A-SW) normally?
Isn't there problem in the power supply input (S9V, D3.3V) of
IC1302 (A-SW), I2C_0 signal (SDA0/SCL0), and defective sol-
dering, etc.?
Where is the input source of the sound from?
(TUNER, EXT1, EXT1, EXT3, EXT4, EXT8)
Check whether there is any problem in each input (terminal).
No sound of external device (3-2)
NO
YES
NO
YES
YES
Check AUDIO OUT terminal (J506) and the connection to an
external device.
NO
The Q1301 base should usually be "H". If it is "L" signal, Check
pin (35) of IC1302, pin (1) of IC1303, and soldering.
YES
Check the power supply input (S9V, D3.3V), soldering, and the
peripheral circuit of IC1302 (A-SW).
NO
Repair the faulty point around IC1302.
TU1102: TUNER
Check pin (AB25) of IC3303, and pin (4) of TUNER.
EXT1/2: SCART1/2
Check pin (44) (43)/(46) (45) of IC1302 and pin (6) (2) of EXT1/2
terminal (SCART1/2).
EXT3: COMP_L/R
Check pin (48) (47) of IC1302, and pin (2) (4) of EXT3 terminal
(J502).
EXT4: PC/HDMI_L/R
Check pin (50) (49) of IC1302, and pin (2) (4) of EXT4 terminal
(J501)
EXT8: CVBS_L/R
Check pin (52) (51) of IC1302, and pin (5) (4) of EXT8 terminal
(J505).
5 – 11
LC-32/40/46LE600E/RU/S
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