NO START IN FUNCTION CD/USB
After connecting the power switch and see the message in the following order (HELLO => VOL XX => CD or USB) ON VFD, another message is not displayed in VFD, and not begin normally.
SDRAM (IC502)
Solution
Check and replace IC502 in the MAIN board.
How to Solve Problems (countermeasures)
1) Check the waveform below and status of SDRAM welding (IC502) in the MAIN board. If pin17 (CAS), pin18 (RAS), pin19 ( CS), pino38 (CLK), pino29 (address), pin2 (DQ) not give results, check the damping resistor (R508, R506, R504, R507).
2) If the resistor is OK, then replace IC502 (SDRAM).
3) After changing IC502, if not already under the waveform, check IC501 (DSP IC).
After connecting the power switch and see the message in the following order (HELLO => VOL XX => CD or USB) ON VFD, another message is not displayed in VFD, and not begin normally.
SDRAM (IC502)
Solution
Check and replace IC502 in the MAIN board.
How to Solve Problems (countermeasures)
1) Check the waveform below and status of SDRAM welding (IC502) in the MAIN board. If pin17 (CAS), pin18 (RAS), pin19 ( CS), pino38 (CLK), pino29 (address), pin2 (DQ) not give results, check the damping resistor (R508, R506, R504, R507).
2) If the resistor is OK, then replace IC502 (SDRAM).
3) After changing IC502, if not already under the waveform, check IC501 (DSP IC).
NO
START IN FUNCTION CD/USB
After
connecting the power switch and see the message in the following order (HELLO =>
VOL XX => CD or USB) ON VFD, another message is not displayed in VFD, and
not begin normally.
DSP
IC (IC501: MLC3700)
Check
and replace IC501 in the MAIN board.
How
to Solve Problems (countermeasures)
1)
After checking them on the previous pages on NOT Startup if the unit is not
booting, check the soldering status IC501.
Check the startup option (R598, R594, R597) of IC501 (DSP IC).
2)
If the shape of boot wave below fails, then replace IC501 (DSP IC).
The MD DOES NOT WORK
When the sound does not come out of the CD function, you cannot hear the music and read the data a CD drive if servo motors do not work in MD. This step serves to check the engine AXIS among other things.
SHAFT MOTOR
Solution: Check and replace the IC407, IC408 on the motherboard.
How to Solve Problems (countermeasures)
1) Check the signal the IC407 Pin16. If there is no signal, check for 3.3V (RF) and X402.
2) Check the SP-SP + and the IC408 from the motor shaft driver CN405. It is about 3.6 Vp-p. If there is no signal, check for 1.8 V and 5 V on IC408.
3) Make sure the FFC cable is properly connected to the CN405 and the MD.
4) Check the MD. If the spindle motor is shorted or has a problem, you cannot run the CD disks.
Check the function after changing the other MD.
MD NOT WORK
When the sound does not come out of the CD function, you cannot hear the music and read the data a CD drive if servo motors do not work in MD. This step It serves to check the SLED MOTOR among other things.
SLED MOTOR
Solution: Check and replace the IC407, IC408 on the motherboard.
How to Solve Problems (countermeasures)
1) Check the signal SLDO the IC407 Pin15. If there is no signal, check 3.3V (RF) and X402.
2) Check the SLED + & SLED- the IC408 CN405 to the motor shaft of the driver. It is about 2.9 Vp-p. If there is no signal, check 1.8 V and 5 V on IC408.
3) Make sure the FFC cable is properly connected to the CN405 and the MD.
4) Check the MD. If the engine is short or has some kind of problem; it will not be able to move the module the pick-up. Please check the function after switching to another MD.
The MD DOES NOT WORK
When the sound does not come out of the CD function, you cannot hear the music and read the data a CD drive if servo motors do not work in MD. This step serves to The check OPENING AND CLOSING MOTOR TRAY among other things.
OPENING ENGINE AND TRAY CLOSE
Solution: Check and replace the IC407, IC408 on the motherboard.
How to Solve Problems (countermeasures)
1) Check the MOT_OPEN & MOT_CLOSE signs of Pin104 and 105 of the IC501 IC408. If there is no signal, check 1.8V and + 5V of IC408.
2) Make LOAD ± of IC406 for CN405 for the operation of opening / closing of the engine tray. Should be approx 3.85 Vp-p. If there is no signal, check for +5 V on IC406. If you have any problems, replace it with a new one.
3) Make sure the FFC cable is properly connected to CN405 and MD.
4) Check the MD. If the engine tray are short or have any problems, you cannot open or close the tray.
Check the function after changing another MD.
The MD DOES NOT WORK
When the sound does not come out of the CD function, you cannot hear the music and read the data a CD drive if the pickup module in the MD not function. This step serves to check the LASER TRACK Activator.
ACTIVATOR OF LASER TRACK.
Solution: Check and replace the IC407, IC408 on the motherboard.
How to Solve Problems (countermeasures)
The tracking actuator causes the laser beam is positioned at the center of a track on the CD.
1) Check the signal TRD pin14 of IC407. If there is no signal, check for 3.3 V (RF) and X402.
2) Check T - & T + the CN404 IC408 for the operation of the tracking actuator. If there is no signal, check for 1.8 V and 5 V on IC408.
3) Make sure the FFC cable is properly connected to the CN404 and the MD.
4) Check the MD. If the pickup module has a problem, you cannot move the laser beam on the left or the right.
Check the function after changing another MD.
MUTE
Not out there on the CD sound function, repair the machine according to instructions as follows.
IN FUNCTION CD
Solution: Check and replace the IC801 IC501, IC602, the MAIN board.
How to Solve Problems (countermeasures)
1) Check the signs CD_BCK, CD_LRCK & CD_DATA IC407 to the IC501. If there is no signal, check that the RF signals and MD servant were received at the IC407.
See "The failure of the MD" section.
2) Check the I2S signal flow. <Audio signal interface I2S>
- DAC_BCK: IC501_pin4 -> IC507_pin14, 16 -> R821 of IC801 (Beat option) & IC602_pin4
- DAC_LRCK: IC501_pin5 -> IC507_pin5, 7 -> R820 of IC801 (Beat option) & IC602_pin5 (44.1 kHz)
- DAC_DATA: IC501_pin6 -> R817 near the IC801 (Beat option) -> IC602_pin6, 9
- DAC_MCLK: IC501_pin3 -> R818 near the IC801
If there are any problems, check the power for each IC. If power is normal, but if the waveform signal to the IC is distorted or there is no signal, replace it with a new one.
Make sure the "AMP block of digital audio" is normal.
NO SOUND
If there is no sound output on the USB function, repair the machine according to the instructions below.
THE USB FUNCTION
Solution: Check and replace the IC501, IC504 in the main and IC3U01 card into the USB adapter.
How to Solve Problems (countermeasures)
1) Check for +5 VU to USB card. If 5.6 VA to pin2 of IC3U01 (LDO) does not come out, check pin21 ~ 23 CN103. If VA 5.6 is normal and 5 VU IC3U01 pin3 does not come out, then replace IC3U01.
2) Check USB D ± the main board to the USB board.
Check USB_HUB_DN / DP signals IC501 (Pin16, 17)
Check signal USB1 / 2_DN / DP IC504 of CN602 (Pin1, 2, 4 and 5) If there are any problems, check the power for each IC. Power is normal, but if the waveform signal to the IC is distorted or no signal exists, replace it with a new one.
3) Make sure the "AMP block of digital audio" is normal.
Contnd:
Electro help - Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....
