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failure
NO.
a. To check whether the signal format of the disc is correspond to the request of the unit, whether there is any
contamination or damage or light leakage on the surface of the disc.
b. To check whether there is any abnormal of the rotation of the deck mecahnism, or whether the disc is enter in
position.
c. To check whether it is normal when reading USB?
d. To check whether the 17 P FFC of laser pick up is inserted in place, whether the socket of it is loose.
e. To check whether there is any contamination or foreign body on the surface of the laser pick up.
f. To check the servo connector of CON601 CON.
4
g. To check the oscillation frequence of crystal X602 , should be 16.9344M.
h. To check the oscillation frequence of crystal X603 , should be 9MHZ.
i. To check the voltage of the 50 pin of IC 602, should be 3.3V.
j. To check the switch S601 on the servo board.
k. To check the rotation mechanism of CD deck mechanism.
l. To check the voltage of the 8 pin of IC 603, should be +8V.
m. To check whether the rotation belt of deck mechanism is dislocation or loose.
a. To check whether the USB signal format is correspond to the request of the unit.
b. To check the voltage of the the uppermost pin of the USB connector, should be +5V.
c. To check the voltage of the first pin of main board IC604 , should be +3V3, when insert USB, the voltage of the second
pin should be +3V, if no insert the USB, the voltege should be 0V.
5
USB
d. To check whether there is any wearing and scratch of the shrapnel and pin of the USB.
defective
e. To check the oscillation frequence of the 7 pin of main board IC604, should be 32.768KHZ.
f. To check whether there is any contamination and bad contact on the male/female connector of the panel and main
board. If necessary, can exchange the panel to test whether the defective is occurred by the unit or panel.
a. To check the SOURCE shoule be in MP3-LINK mode.
b. To check the AUX IN input signal
6
AUX
defective
c. To check whether there is any contamination and bad contact on the male/female connector of the panel and main
board. If necessary, can exchange the panel to test whether the defective is occurred by the unit or panel.
failure cause
remark
24
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