Chapter 4. Troubleshooting Table Troubleshooting Table - Sharp LC-52DH65E Service Manual

CHAPTER 4.
LC52DH65E TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
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
Is I2SO_DATA signal input to IC1304 (POWER_AMP.)?
Pin30: I2SO_DATA
Pin28: I2SO_SCLK
Pin29: I2SO_LRCLK
Pin27: I2S0_MCLK
Is the I2C SERIAL DATA/CLOCK communication of IC1304 nor-
mal? (Pin33: SDA1/Pin34: SCL1)
Is the audio signal output of pin(13, 10/L-ch), (9, 6/R-ch) of
IC1304 (POWER_AMP.) normal?
Is the audio signal output of pins (1, 2/L-ch), (4, 3/R-ch) of
P1301(SP) terminal normal?
Check Speaker (right and left) and wire harness.
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)?
Is the SIF signal sent to pins (92) of IC1302(DSP)?
Refer to "No sound output in all modes"
The sound is not emitted from the speaker though the picture has come out.
YES
YES
YES
YES
No sound (during the reception of TV(ANALOG) broadcasting)
YES
YES
Service Manual
NO Is the I2C SERIAL DATA/CLOCK communication of IC1302 nor-
mal? (Pin52: SDA1/Pin51: SCL1)
Check IC1302 and its peripheral circuits.
NO Check the line between IC1302 and IC1304.
NO Check IC1304 and its peripheral circuits.
NO Check IC1304 and its peripheral circuits.
NO P1301(SP) terminal and the peripheral circuit (L/C filter) are
checked.
NO Check the tuner and its peripheral circuits.
Replace as required.
NO Check the line between TU7501 and IC1302.
(Q7503, etc.)
4 – 1
L C - 5 2 D H 6 5 E / S , L C - 5 2 D H 6 6 E
YES