LG Mini Hi-Fi audio OM5560 How to troubleshoot, How to update the firmware, connectors and ICs voltages
AUDIO PROGRAM
The
file name of the program to download must be MICOM_OM5560_YYMMDDX.HEX
If
the security program (Water Wall) is activated on the PC, you must save the
file on the USB storage and disable security software; Then download the file
to the device.
The
file downloads proceeds in the same way for the USB1 and USB2 functions.
Caution:
During file download, do not disconnect the USB device, do not switch to
another function, and do not turn off the appliance. The USB device should be
disconnected when the process of download.
1)
(Quick) format of the USB memory.
2)
Copy the firmware file to the USB memory.
CD PROGRAM
The
file name of the program to download must be HG690_OM5560_YYMMDDX.bin
If
the security program (Water Wall) is activated on the PC, you must save the
file on the USB storage and disable security software; Then download the file
to the device.
The
file downloads proceeds in the same way for the USB1 and USB2 functions.
Caution:
During file download, do not disconnect the USB device, do not switch to
another function, and do not turn off the appliance. The USB device should be
disconnected when the process of download.
1)
(Quick) format of the USB memory.
2)
Copy the firmware file to the USB memory.
EQ PROGRAM
The
file name of the program to download must be EQ_PRG.BIN
If
the security program (Water Wall) is activated on the PC, you must save the
file on the USB storage and disable security software; Then download the file
to the device.
The
file downloads proceeds in the same way for the USB1 and USB2 functions.
Caution:
During file download, do not disconnect the USB device, do not switch to
another function, and do not turn off the appliance. The USB device should be
disconnected when the process of download.
1)
(Quick) format of the USB memory.
2)
Copy the firmware file to the USB memory.
Disassemble procedure
1)To
disassemble the upper part do not rotate and disassemble by pulling up.
2)
To remove the front panel, loosen the two screws and proceed.
MECHANISM DECK SECTION (DM19AC)
REPAIR GUIDE: NO POWER
If the unit doesn’t work by no power problem, repair the set according to the following guide.
FUSE/ THERMISTOR/ BRIDGE DIODE
Please check and replace F901, TH901 or TH903, BD901 on SMPS board.
How to troubleshoot (Countermeasure)
1) Check if the fuse F901 is open or short-circuit.
2) Check if the NTC thermistor TH900 or TH903 is normal or open.
3) Check if the bridge diode BD901 is short-circuit by over current with a digital multi-meter.
If the unit doesn’t work by no power problem, repair the set according to the following guide.
FUSE/ THERMISTOR/ BRIDGE DIODE
Please check and replace F901, TH901 or TH903, BD901 on SMPS board.
How to troubleshoot (Countermeasure)
1) Check if the fuse F901 is open or short-circuit.
2) Check if the NTC thermistor TH900 or TH903 is normal or open.
3) Check if the bridge diode BD901 is short-circuit by over current with a digital multi-meter.
NO POWER
If the unit doesn’t work by no PVDD problem, repair the set according to the following guide.
FUSE/ FET
Solution
Please check and replace F901, Q901 on SMPS board.
If the unit doesn’t work by no PVDD problem, repair the set according to the following guide.
FUSE/ FET
Solution
Please check and replace F901, Q901 on SMPS board.
How to troubleshoot (Countermeasure)
1) Check if the fuse F901 is open or short-circuit.
2) Check the anode-cathode voltage of D951 with a digital multi-meter, it is normally 0.2 ~ 0.3 V.
If it doesn’t have any voltage, it’s destroyed. Replace it with a new one.
1) Check if the fuse F901 is open or short-circuit.
2) Check the anode-cathode voltage of D951 with a digital multi-meter, it is normally 0.2 ~ 0.3 V.
If it doesn’t have any voltage, it’s destroyed. Replace it with a new one.
NO
BOOTING WHEN POWER ON THE SET
The set doesn’t work when presses the power button on the top board or the remote control.
The set doesn’t work when presses the power button on the top board or the remote control.
Replace IC501 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check the +12 VA (CN202) and 3.3VA (IC503) in standby mode.
If there is no 12 VA, check the SMPS and if doesn’t appear 3.3 VA, check IC503.
2) Check +12 VA, +5.1 VA, 3.3 VA, DVCC_5V and DVCC_3.3V when power on the set.
- If the set doesn’t work regardless of what the KEY1 changes high to low while pressing the power button.
X500 and X501 work normally but, if you cannot power on the set, replace the IC501 with a new one on the main board.
How to troubleshoot (Countermeasure)
1) Check the +12 VA (CN202) and 3.3VA (IC503) in standby mode.
If there is no 12 VA, check the SMPS and if doesn’t appear 3.3 VA, check IC503.
2) Check +12 VA, +5.1 VA, 3.3 VA, DVCC_5V and DVCC_3.3V when power on the set.
- If the set doesn’t work regardless of what the KEY1 changes high to low while pressing the power button.
X500 and X501 work normally but, if you cannot power on the set, replace the IC501 with a new one on the main board.
VFD IS NOT DISPLAYED WHEN POWER ON THE
SET
When power on the set, any icons or characters on VFD are not displayed.
When power on the set, any icons or characters on VFD are not displayed.
Check and replace VFD301 on TOP FRONT board.
How to troubleshoot (Countermeasure)
1) Check if VFD_12V, DVCC_3.3V and VCC_5V are output from SMPS to VFD via the main board.
2) Check if the IC501 outputs VFD_CLK, VFD_STB, and VFD_DAT to the top board.
3) Check if the VFD grid current amplifier circuit on the top board.
Check the drive signal to the transistor’s (Q801,2) base.
If the control signals from VFD (DGND, VDD) isn’t output, replace VFD with a new one.
How to troubleshoot (Countermeasure)
1) Check if VFD_12V, DVCC_3.3V and VCC_5V are output from SMPS to VFD via the main board.
2) Check if the IC501 outputs VFD_CLK, VFD_STB, and VFD_DAT to the top board.
3) Check if the VFD grid current amplifier circuit on the top board.
Check the drive signal to the transistor’s (Q801,2) base.
If the control signals from VFD (DGND, VDD) isn’t output, replace VFD with a new one.
NO BOOTING (IN CD/USB FUNCTION)
After you turn on power key and displayed message in the following order (HELLO è VOL XX è CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
After you turn on power key and displayed message in the following order (HELLO è VOL XX è CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
Check and replace IC202, IC205 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check Voltage of IC202 pin3 on MAIN board.
If IC202 pin3 (about 5.1 V) & pin1 Input 12 VA doesn’t come out, check +12 VA from SMPS board.
2) If IC202 pin3 (about 5.1 V) is normal, check voltage of IC205 pin3 (about 1.2 VA), pin6 (about 3.3 VA).
If IC205 pin3 (about 1.2 VA), pin6 (about 3.3 VA) doesn’t come out, check R253, R254, R256 and R260, R261, R262.
If there’s no defective component then replace IC205.
3) PWR_CTRL is high, check R512 and if there’s no defective component then replace IC505.
PWR_CTRL (IC505 pin3) is high (about 3.2 V)
If PWR_CTRL isn’t high, check pin D11 of IC501 & R512, R513
4) If PWR_CTRL is high, check R559 and if there’s no defective component then replace IC505.
1) Check Voltage of IC202 pin3 on MAIN board.
If IC202 pin3 (about 5.1 V) & pin1 Input 12 VA doesn’t come out, check +12 VA from SMPS board.
2) If IC202 pin3 (about 5.1 V) is normal, check voltage of IC205 pin3 (about 1.2 VA), pin6 (about 3.3 VA).
If IC205 pin3 (about 1.2 VA), pin6 (about 3.3 VA) doesn’t come out, check R253, R254, R256 and R260, R261, R262.
If there’s no defective component then replace IC205.
3) PWR_CTRL is high, check R512 and if there’s no defective component then replace IC505.
PWR_CTRL (IC505 pin3) is high (about 3.2 V)
If PWR_CTRL isn’t high, check pin D11 of IC501 & R512, R513
4) If PWR_CTRL is high, check R559 and if there’s no defective component then replace IC505.
NO BOOTING (IN CD/USB FUNCTION)
After you turn on power key and displayed message in the following order (HELLO è VOL XX èCD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
After you turn on power key and displayed message in the following order (HELLO è VOL XX èCD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
Replace X500 on MAIN board.
How to troubleshoot (Countermeasure)
1) If 3.3 VA & 1.2 VA is normal, check reset ‘High’ of IC501 pin T12 on MAIN board.
è If MAIN_RESET isn’t high, check MICOM (IC101) pin40.
2) If MAIN_RESET is high, check the soldering status of 24 MHz crystal (X500).
3) If the crystal (X500) doesn’t oscillate, check R508, C502, C503 around crystal (X500).
è If there’s no defective component, then replace X500.
How to troubleshoot (Countermeasure)
1) If 3.3 VA & 1.2 VA is normal, check reset ‘High’ of IC501 pin T12 on MAIN board.
è If MAIN_RESET isn’t high, check MICOM (IC101) pin40.
2) If MAIN_RESET is high, check the soldering status of 24 MHz crystal (X500).
3) If the crystal (X500) doesn’t oscillate, check R508, C502, C503 around crystal (X500).
è If there’s no defective component, then replace X500.
NO BOOTING (IN CD/USB FUNCTION)
After you turn on power key and displayed message in the following order (HELLO è VOL XX è CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
After you turn on power key and displayed message in the following order (HELLO è VOL XX è CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
SERIAL FLASH (IC503): check and replace IC503 on MAIN board.
If the crystal (X500) does oscillate, check serial flash (IC503)
on MAIN board.
Check pin8 (VCC), pin6 (CLK), pin1 (CS), pin2 (DO), pin5 (DI) of below waveform.
2) If pin1, 2, 5, 6 doesn’t come out, check registers (R563, R564, R534, R535, R536, R5E4) of IC503.
If registers of IC503 is OK, then replace IC503. (it need to download program.)
3) After change IC503, if It is still not below waveform, check IC501 (DSP IC).
Check pin8 (VCC), pin6 (CLK), pin1 (CS), pin2 (DO), pin5 (DI) of below waveform.
2) If pin1, 2, 5, 6 doesn’t come out, check registers (R563, R564, R534, R535, R536, R5E4) of IC503.
If registers of IC503 is OK, then replace IC503. (it need to download program.)
3) After change IC503, if It is still not below waveform, check IC501 (DSP IC).
NO OPERATION OF MD
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SPINDLE MOTOR among them.
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SPINDLE MOTOR among them.
SPINDLE MOTOR: Replace IC400 on MAIN board.
Check the SPDO signal from pin16 of IC401.
If no signal, check DVCC_3.3V and DV 3.3V (RF) and X400.
2) Check the SPIN+ & SPIN- from IC400 to CN401 for driving SPINDLE motor. It is about 3.6 Vp-p.
If no signal, check M_5 V for IC400.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs.
Please check the function after changing another MD.
If no signal, check DVCC_3.3V and DV 3.3V (RF) and X400.
2) Check the SPIN+ & SPIN- from IC400 to CN401 for driving SPINDLE motor. It is about 3.6 Vp-p.
If no signal, check M_5 V for IC400.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs.
Please check the function after changing another MD.
NO OPERATION OF MD
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SLED MOTOR among them.
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SLED MOTOR among them.
SLED MOTOR: Replace IC400 on
MAIN board.
Check the SLDO signal from pin15 of IC401.
If no signal, check DVCC_3.3V and DV 3.3V(RF) and X400.
2) Check the SPED+ & SLED- from IC400 to CN401 for driving SPINDLE motor. It is about 2.9 Vp-p.
If no signal, check M_5 V for IC400.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs.
Please check the function after changing another MD.
If no signal, check DVCC_3.3V and DV 3.3V(RF) and X400.
2) Check the SPED+ & SLED- from IC400 to CN401 for driving SPINDLE motor. It is about 2.9 Vp-p.
If no signal, check M_5 V for IC400.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs.
Please check the function after changing another MD.
NO OPERATION OF MD
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the TRAY OPEN / CLOSE MOTOR among them.
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the TRAY OPEN / CLOSE MOTOR among them.
TRAY OPEN/ CLOSE MOTOR: Replace IC400 on
MAIN board.
Check MOT_OPEN & MOT_CLOSE signals from pin P5, L4 of IC501
to IC400.
If no signal, check M_5V to IC400.
2) Check LOAD± from IC400 to CN401 for driving the tray open / close motor. It is about 3.85 Vp-p.
If no signal, check M_5V to IC400. If it has any trouble, replace it with a new one.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
If the tray motor is sort-circuit or has any trouble, it can not open or close the tray.
Please check the function after changing another MD.
If no signal, check M_5V to IC400.
2) Check LOAD± from IC400 to CN401 for driving the tray open / close motor. It is about 3.85 Vp-p.
If no signal, check M_5V to IC400. If it has any trouble, replace it with a new one.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
If the tray motor is sort-circuit or has any trouble, it can not open or close the tray.
Please check the function after changing another MD.
NO OPERATION OF MD
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER TRACKING ACTUATOR.
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER TRACKING ACTUATOR.
LASER TRACKING ACTUATOR: Replace IC400 on
MAIN board.
The tracking actuator makes the laser beam be positioned in the
center of a track on CD disc.
1) Check the TRD signal from pin14 of IC401.
If no signal, check DVCC_3.3V & DV_3.3V (RF) and X400.
2) Check TR- & TR+ from IC400 to CN400 for driving the tracking actuator.
If no signal, check M_5V for IC400.
3) Check if the FFC cable is solidly connected between CN400 and MD.
4) Check the MD.
If the pickup module has any trouble, it can not move the laser beam on the left or right side.
Please check the function after changing another MD.
1) Check the TRD signal from pin14 of IC401.
If no signal, check DVCC_3.3V & DV_3.3V (RF) and X400.
2) Check TR- & TR+ from IC400 to CN400 for driving the tracking actuator.
If no signal, check M_5V for IC400.
3) Check if the FFC cable is solidly connected between CN400 and MD.
4) Check the MD.
If the pickup module has any trouble, it can not move the laser beam on the left or right side.
Please check the function after changing another MD.
NO OPERATION OF MD
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER FOCUSING ACTUATOR.
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER FOCUSING ACTUATOR.
LASER FOCUSING ACTUATOR: Replace IC400 on
MAIN board.
The focusing actuator makes the laser beam keep a regular
interval with the surface of a CD disc.
1) Check the FDO signal from pin13 of IC401.
If no signal, check DVCC_3.3 & DV_3.3V(RF) and X400.
2) Check F- & F+ from IC400 to CN400 for driving the focusing actuator.
If no signal, check M_5V for IC400.
3) Check if the FFC cable is solidly connected between CN400 and MD.
4) Check the MD.
If the pickup module has any trouble, it cannot move the laser beam on the top or bottom side.
Please check the function after changing another MD.
1) Check the FDO signal from pin13 of IC401.
If no signal, check DVCC_3.3 & DV_3.3V(RF) and X400.
2) Check F- & F+ from IC400 to CN400 for driving the focusing actuator.
If no signal, check M_5V for IC400.
3) Check if the FFC cable is solidly connected between CN400 and MD.
4) Check the MD.
If the pickup module has any trouble, it cannot move the laser beam on the top or bottom side.
Please check the function after changing another MD.
There is no sound output by DIGITAL
AUDIO AMP DAMAGE, repair the set according to the following guide.
DIGITAL AUDIO AMP DAMAGE: Replace IC701,
IC702 on MAIN board.
Check PWM_FL±, PWM_FR± & PWM_SW± signals from IC601 to IC701
& 702 each input function.
If no signal, check if I2S audio signals are entered to IC601.
2) Check PVDD.
If PVDD is abnormal, check the SMPS.
3) Check AMP_12V for driving the gate of AMP IC.
a. All the powers are normal, but if AMP_12V is low, there is possible for AMP IC to be damaged.
b. Remove L701, L702, L703 and L704 one by one.
When removed a inductance, if AMP_12V is recovered, the IC connected to it was damaged.
c. Replace the IC with a new one.
4) Check the impedance between IC701/IC702_OUT_A/OUT_B & GND.
a. If the impedance is 0 Ω, the IC must be damaged.
b. After removing the heat sink, replace it with a new one.
If no signal, check if I2S audio signals are entered to IC601.
2) Check PVDD.
If PVDD is abnormal, check the SMPS.
3) Check AMP_12V for driving the gate of AMP IC.
a. All the powers are normal, but if AMP_12V is low, there is possible for AMP IC to be damaged.
b. Remove L701, L702, L703 and L704 one by one.
When removed a inductance, if AMP_12V is recovered, the IC connected to it was damaged.
c. Replace the IC with a new one.
4) Check the impedance between IC701/IC702_OUT_A/OUT_B & GND.
a. If the impedance is 0 Ω, the IC must be damaged.
b. After removing the heat sink, replace it with a new one.
There is no sound output in the CD
FUNCTION, repair the set according to the following guide.
CD FUNCTION: Replace IC501 on
MAIN board.
Check CD_BCK, CD_LRCK, & CD_DATA signals from IC501 to
IC401.
If no signal, check if the RF & servo signals from MD is entered to IC401.
Refer to the “No operation of MD” guide on Item 5.
If no signal, check if the RF & servo signals from MD is entered to IC401.
Refer to the “No operation of MD” guide on Item 5.
2) Check the following I2S signal flow. < I2S audio signal
Interface >
- MCS_BCK : IC501_pin E1 --> IC601_pin23
- MCS_LRCK : IC501_pin D1 --> IC601_pin22 (44.1 kHz)
- MIX_DATA0_OUT : IC501_pin E2 --> IC601_pin24
- MCS_MCLK : IC501_pin D2 --> IC201_pin44
- MCS_BCK : IC501_pin E1 --> IC601_pin23
- MCS_LRCK : IC501_pin D1 --> IC601_pin22 (44.1 kHz)
- MIX_DATA0_OUT : IC501_pin E2 --> IC601_pin24
- MCS_MCLK : IC501_pin D2 --> IC201_pin44
If there is any trouble,
check the power for each IC.
The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
There is no sound output in the USB
Function, repair the set according to the following guide.
USB FUNCTION: Replace IC204 on
MAIN board.
Check +5V_USB to USB board.
If the USB LED are turned on, the voltage is okay, if so not, check USB_5V to pin5, 6 of CN803.
2) Check USB D1± or USB D2± from MAIN board to TOP board.
a. Check 2.0_D1±signals(pin U7, U8 ) or 1.1_D1± signals(pin A7, A8 ) to IC501.
b. Check USB± signals to CN502(pin1, 2, 8, 9).
If there is any trouble, check the power for IC204.
The power is normal but, if the signal waveform to the IC is distorted or no signal,
replace it with a new one.
3) Check if “Digital audio AMP block” on item 6-1 is normal.
If the USB LED are turned on, the voltage is okay, if so not, check USB_5V to pin5, 6 of CN803.
2) Check USB D1± or USB D2± from MAIN board to TOP board.
a. Check 2.0_D1±signals(pin U7, U8 ) or 1.1_D1± signals(pin A7, A8 ) to IC501.
b. Check USB± signals to CN502(pin1, 2, 8, 9).
If there is any trouble, check the power for IC204.
The power is normal but, if the signal waveform to the IC is distorted or no signal,
replace it with a new one.
3) Check if “Digital audio AMP block” on item 6-1 is normal.
There is no sound output in the AUX
Function, repair the set according to the following guide.
AUX FUNCTION: Replace IC201 on
MAIN board.
Check AUX_L/R signals to IC201 (pin23, 24).
2) Check if MCS_BCK, MCS_LRCK & MCS_MCLK are entered from IC501 to IC201.
3) Check if ADC_DATA is entered from IC201 to IC501.
If no signal, check DVCC_5V & DVCC_3.3V (ADC) for IC201. If is NG, replace it a new one.
4) Check the following I2S signal flow from IC501 to IC601. (Refer to Item 6-2.)
If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform
to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-1.
If AMP is damaged, replace it with a new one.
2) Check if MCS_BCK, MCS_LRCK & MCS_MCLK are entered from IC501 to IC201.
3) Check if ADC_DATA is entered from IC201 to IC501.
If no signal, check DVCC_5V & DVCC_3.3V (ADC) for IC201. If is NG, replace it a new one.
4) Check the following I2S signal flow from IC501 to IC601. (Refer to Item 6-2.)
If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform
to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-1.
If AMP is damaged, replace it with a new one.
TUNER FUNCTION: Replace IC201 on
MAIN board.
Check if TUNER_LR is entered from pin1, 3 of TU500 to IC201
(pin26, 27).
If no signals, check DVCC_3.3V for tuner power.
Check if the tuner control signals (CLK, DAT, CE, RST, SLT) are entered from IC501 to TU500.
If it doesn’t work, replace TUNER with a new one.
2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC201.
3) Check if ADC_DATA is entered from IC201 to IC501.
If no signal, check DVCC_5V & DVCC_3.3V (ADC) for IC201. If is NG, replace it with a new one.
4) Check the following I2S audio signal flow from IC501 to IC601. (Refer to Item 6-2.)
If there is any trouble, check the power for each IC.
The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-1.
If AMP is damaged, replace it with a new one.
If no signals, check DVCC_3.3V for tuner power.
Check if the tuner control signals (CLK, DAT, CE, RST, SLT) are entered from IC501 to TU500.
If it doesn’t work, replace TUNER with a new one.
2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC201.
3) Check if ADC_DATA is entered from IC201 to IC501.
If no signal, check DVCC_5V & DVCC_3.3V (ADC) for IC201. If is NG, replace it with a new one.
4) Check the following I2S audio signal flow from IC501 to IC601. (Refer to Item 6-2.)
If there is any trouble, check the power for each IC.
The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-1.
If AMP is damaged, replace it with a new one.
There is no sound output in the
PORTABLE Function, repair the set according to the following guide.
PORTABLE FUNCTION: Replace IC201 on
MAIN board.
Check if PT_LR signals to IC201 (pin9, 10).
2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC201.
3) Check if ADC_DATA is entered from IC201 to IC501.
If no signal, check DVCC_5V & DVCC_3.3V (ADC) for IC201. If is NG, replace it with a new one.
4) Check the following I2S audio signal flow from IC501 to IC601. (Refer to Item 6-2.)
If there is any trouble, check the power for each IC.
The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-1.
If AMP is damaged, replace it with a new one.
2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC201.
3) Check if ADC_DATA is entered from IC201 to IC501.
If no signal, check DVCC_5V & DVCC_3.3V (ADC) for IC201. If is NG, replace it with a new one.
4) Check the following I2S audio signal flow from IC501 to IC601. (Refer to Item 6-2.)
If there is any trouble, check the power for each IC.
The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-1.
If AMP is damaged, replace it with a new one.
There is no sound output in the MIC IN
function, repair the set according to the following guide.
MIC IN function: Replace IC206 on
MAIN board, ICA301 on TOP FRONT board.
Check MIC_SI & MIC_S2 signal to pin5 & 6 of CN201.
If no signal, Check the signals to pin6 & 8 of CNA301 on the FRONT board.
Check if the signal is entered from pin 6 & 8 of CNA301 to pin 5 & 6 of CN201.
2) Check if MIC_SIG is entered from pin 6 of JK302 & JKA303 to pin2, 13 to ICA301 (PRE AMP).
3) Check if the amplified signal comes out from pin3 &12 of ICA301.
If no signal output, check DVCC_3.3V for ICA301, replace ICA301 with a new one if it has a problem.
4) Check if MCS_BCK, MCS_MLCK & MCS_LRCK is entered from IC501 to IC206.
Check if MIC_DATA_IN is entered from pin9 of IC206 to pin T1of IC501.
If no signal, check DVCC_5V & DVCC_3.3V for IC206.
If it is abnormal, change replace it a new one.
5) Check the following I2S signal flow from IC206 to IC501.
If there is any trouble, check the power for each IC.
If the signals are abnormal, replace it a new one.
6) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on item 6-1.
If AMP is damaged, replace it with a new one.
If no signal, Check the signals to pin6 & 8 of CNA301 on the FRONT board.
Check if the signal is entered from pin 6 & 8 of CNA301 to pin 5 & 6 of CN201.
2) Check if MIC_SIG is entered from pin 6 of JK302 & JKA303 to pin2, 13 to ICA301 (PRE AMP).
3) Check if the amplified signal comes out from pin3 &12 of ICA301.
If no signal output, check DVCC_3.3V for ICA301, replace ICA301 with a new one if it has a problem.
4) Check if MCS_BCK, MCS_MLCK & MCS_LRCK is entered from IC501 to IC206.
Check if MIC_DATA_IN is entered from pin9 of IC206 to pin T1of IC501.
If no signal, check DVCC_5V & DVCC_3.3V for IC206.
If it is abnormal, change replace it a new one.
5) Check the following I2S signal flow from IC206 to IC501.
If there is any trouble, check the power for each IC.
If the signals are abnormal, replace it a new one.
6) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on item 6-1.
If AMP is damaged, replace it with a new one.
There is no sound output in the
Bluetooth function, repair the set according to the following guide.
BLUETOOTH FUNCTION: Replace IC501 on
the MAIN board or bluetooth module on the FRONT Panel.
Check BT_RX, BT_TX signal to pin6, 4 of CN504.
If no signal, check the signal to pin4, 6 and pin10 (BT_3.3V) of on the Bluetooth module
and cable connection state.
If there are no signal out from module, replace new module.
2) Check if BT_RX/TX is entered from pin6, 4 of CN504 to pin L1,K1 to IC501 (DSP).
3) Check if MCS_BCK, MCS_LRCK & MIX_DATA IN is entered from IC501 to IC601.
If no signal, check +3.3 VA & +1.2 VA for IC501.
If it is abnormal, change replace it a new one.
4) Check the following I2S signal flow from IC501 to IC601.
If there is any trouble, check the power for each IC.
If the signals are abnormal, replace it a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on item 6-1.
If AMP is damaged, replace it with a new one.
If no signal, check the signal to pin4, 6 and pin10 (BT_3.3V) of on the Bluetooth module
and cable connection state.
If there are no signal out from module, replace new module.
2) Check if BT_RX/TX is entered from pin6, 4 of CN504 to pin L1,K1 to IC501 (DSP).
3) Check if MCS_BCK, MCS_LRCK & MIX_DATA IN is entered from IC501 to IC601.
If no signal, check +3.3 VA & +1.2 VA for IC501.
If it is abnormal, change replace it a new one.
4) Check the following I2S signal flow from IC501 to IC601.
If there is any trouble, check the power for each IC.
If the signals are abnormal, replace it a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on item 6-1.
If AMP is damaged, replace it with a new one.
FLD DISPLAY CHECK
Voltage chart
