Philips CEM2100/00 Service Manual page 25

NO.
failure phenomena
4
5
USB defective
6
AUX defective
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 CON602
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
d. To check whether there is any wearing and scratch of the
shrapnel and pin of the USB.
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
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
2
remark