LC-32D65 (serv.man5). Troubleshooting Table — Sharp TV Service Manual (repair manual)

Model
LC-32D65 (serv.man5)
Pages
19
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966.46 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting Table
File
lc-32d65-sm5.pdf
Date

View Sharp LC-32D65 (serv.man5) Service Manual online

LC-32D65E/RU, LC-37D65E/RU
4 – 1
LC32D65E
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”
LC-32D65E/RU, LC-37D65E/RU
4 – 2
<LC-32/37D65E>
<LC-32/37DH65E>
No sound (during the reception of TV(DIGITAL) broadcasting) (1) 
                                            
Does not the sound go out though the picture has come out when DTV is received?
Is DTV_I2S signal output from pin (F4/DTV_SCK), (F5/DTV_WS) 
and (F3/DTV_SDO) of IC8101 (DIGITAL AV DECODER & MAIN 
CPU & VIDEO PROCESSER)?
NO
Check IC8101 and its peripheral circuits.
YES
Is DIG_I2S signal input to pin (82/DTV_SCK), (83/DTV_WS) and 
(84/DTV_SDO) of IC1302 (DSP)?
NO
Check the line between IC8101 and IC1302.
YES
Refer to “No sound output in all modes”.
No sound (during the reception of TV(DIGITAL) broadcasting) (2)
Does not the sound go out though the picture has come out when DTV(H.264) is received?
Is H.264_I2S signal output from pin (D26/H.264_I2S_MCLK), 
(E24/H.264_I2S_SCLK), (E26/H.264_I2S_LRCLK) and (A25/
H.264_I2S_DATA) of IC5001 (H.264_DECODER)?
NO
Check IC5001 and its peripheral circuits.
YES
Is H.264_I2S signal input to pin (13/H.264_I2S_MCLK), (3/
H.264_I2S_SCLK), (6/H.264_I2S_LRCLK) and (10/
H.264_I2S_DATA) of IC1306 (SW.)?
NO
Check the line between IC5001 and IC1306.
YES
Is DIG_I2S signal input to pin (82/DTV_SCK), (83/DTV_WS) 
and (84/DTV_SDO) of IC1302 (DSP)?
NO
Check the line between IC1306 and IC1302.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (1)
                                            
Does not the sound of the audio signal input to EXT1/EXT2 go out?
Is there a audio input signal in pins (6/IN1L) and (2/IN1R) of 
EXT1 (SC502)?
NO
Check the setting of an external input device that connects with 
EXT1.
Is there a audio input signal in pins (6/IN2L) and (2/IN2R) of 
EXT2 (SC501)?
NO
Check the setting of an external input device that connects with 
EXT2.
YES
EXT1
Is the audio signal input to pins(9/AIN1_L) and (10/AIN1_R) of 
IC1302(DSP)?
NO
Check the line between SC502 and IC1302.
EXT2
Is the audio signal input to pins (13/AIN2_L) and (14/AIN2_R) of 
IC1302 (DSP)?
NO
Check the line between SC501 and IC1302.
YES
Refer to “No sound output in all modes”.
LC-32D65E/RU, LC-37D65E/RU
4 – 3
No sound from external input devices (2)
                                            
Does not the sound of the audio signal input to EXT3 go out?
Is there a audio input signal in pins (2/IN4L) and (4/IN4R) of 
EXT3 (J502)?
NO
Check the setting of an external input device that connects with 
EXT3.
YES
Is the audio signal input to pins(99/AIN4_L) and (100/AIN4_R) of 
IC1302(DSP)?
NO
Check the line between SC502 and IC1302.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (3)
Does not the sound of the audio signal input to HDMI-2 
mode go out?
Does not the sound of the audio signal input to PC mode go 
out?
"Checked whether to have selected " "Analogue" " by the Audio 
setup of the HDMI option. "
YES
Is there a audio input signal in pins(2/PC_L) and (3/PC_R) of HDMI-2/PC(J1301)?
YES
NO
Check the setting of an external input device that connects with 
HDMI-2/PC.
Is the audio signal input to pins (19/AIN3_L) and (20/AIN3_R) of 
IC1302 (DSP)?
NO
Check the line between SC502 and IC1302.
YES
Refer to “No sound output in all modes”.
No sound from external input devices (4)
Does not the sound of the audio signal input to EXT8 go out?
Is there a audio input signal in pins(5/IN3L) and (4/IN3R) of 
EXT8(J505)?
NO
Check the setting of an external input device that connects with 
EXT8.
YES
Is the audio signal input to pins(28/AIN3_L) and (29/AIN3_R) of 
IC1302(DSP)?
NO
Check the line between SC502 and IC1302.
YES
Refer to “No sound output in all modes”.
LC-32D65E/RU, LC-37D65E/RU
4 – 4
<LC-32D65E/RU, LC-37D65E/RU>
The audio signal is not output (1)
                                             
No audio signal output from EXT1/EXT2 terminal.
Is there a audio output signal in pins (3/L-ch) and (1/R-ch) of 
EXT1 (SC502)?
YES
Check the setting of an external input device that connects with 
EXT1.
Is there a audio output signal in pins (3/L-ch) and (1/R-ch) of 
EXT2 (SC501)?
YES
Check the setting of an external input device that connects with 
EXT2.
NO
<EXT1>
Is SC-MUTE [pin(67) of IC9101(CPLD)] at H?
YES
Check the peripheral circuits of IC9101 and SC-MUTE.
(Q503, Q505, etc.)
<EXT2>
Is SC2-MUTE [pin(65) of IC9101(CPLD)] at H?
YES
Check the peripheral circuits of IC9101 and SC2-MUTE.
(Q502, Q504, etc.)"
NO
<EXT1>
Is there a audio output signal in pins(39/SC1_OUT_L) and (38/
SC1_OUT_R) of IC503(AV_SW)?
YES
Check the line between IC503 and SC502.
<EXT2>
Is there a audio output signal in pins(37/SC2_OUT_L) and (36/
SC2_OUT_R) of IC503(AV_SW)?
YES
Check the line between IC503 and SC501.
NO
Check IC503 and its peripheral circuits.
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