LC-46DH65E/S, LC-46DH66E
4 – 1
LC46DH65E
Service Manual
CHAPTER 4.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
The sound is not emitted from the speaker though the picture has come out.
No sound output in all modes.?
Is I2SO_DATA signal output more than IC1302 (DSP)?
Pin58: I2SO_DATA
Pin57: I2SO_SCLK
Pin56: I2SO_LRCLK
Pin75: I2SO_MCLK
NO
Is the I2C SERIAL DATA/CLOCK communication of IC1302 nor-
mal? (Pin52: SDA1/Pin51: SCL1)
YES
Check IC1302 and its peripheral circuits.
Is I2SO_DATA signal input to IC1304 (POWER_AMP.)?
Pin30: I2SO_DATA
Pin28: I2SO_SCLK
Pin29: I2SO_LRCLK
Pin27: I2S0_MCLK
NO
Check the line between IC1302 and IC1304.
YES
Is the I2C SERIAL DATA/CLOCK communication of IC1304 nor-
mal? (Pin33: SDA1/Pin34: SCL1)
NO
Check IC1304 and its peripheral circuits.
YES
Is the audio signal output of pin(13, 10/L-ch), (9, 6/R-ch) of
IC1304 (POWER_AMP.) normal?
NO
Check IC1304 and its peripheral circuits.
YES
Is the audio signal output of pins (1, 2/L-ch), (4, 3/R-ch) of
P1301(SP) terminal normal?
NO
P1301(SP) terminal and the peripheral circuit (L/C filter) are
checked.
YES
Check Speaker (right and left) and wire harness.
No sound (during the reception of TV(ANALOG) broadcasting)
Does not the sound go out though the picture has come out when UHF/VHF is received?
Is a SIF signal output from pin (4) of TUNER (TU7501)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
YES
Is the SIF signal sent to pins (92) of IC1302(DSP)?
NO
Check the line between TU7501 and IC1302.
(Q7503, etc.)
YES
Refer to “No sound output in all modes”
