Philips CMD305A/05, Руководство по обслуживанию

Страница: 28 / 28

b
To check whether the antenna have a good quality or whether the solder point is opened.
f To check whether the outpput voltage of the L/R 5 6 pin of the Tuner is normal, and to check whether the signal
coupling capacitor is normal.
a To check whether the AM/FM external antenna is connected well.
J The voltage of the control pin SDA SCL 27 28 of the audio processor IC402 PT7313E should be 3V.
g To check the oscillation frequence of X1 crystal, should be 32.768KHZ.
c To check whether the intensity of radio input signal is too weak.
e To check the voltage of the radio data Pin TUNER-RES TUNER-CLK TUNER-DA(10 11 12 Pin , should be 3V3
3
Radio
abnormal
d To check the supply voltage of the 7th pin of the radio board, should be +3V3.
a To check whether the bluetooth mobilephone have paired with the uint and was in the connection status.
b To check the voltage of the fourth pin of the bluetooth module shoule be 5V.
AUX
defective
6
BT
defective
c To check whether the CON402 is loose.
USB/SD
defective
USB/SD
4
d To check whether the data communication of the CON402 flat cable and the AUX jack is normal.
a To check whether the USB/SD signal format is correspond to the request of the unit.
c To check whether there is any wearing and scratch of the shrapnel and pin of the USB.
d To check whether the CON703 connector is connected in place, not loose, the data communication of the all the CON703
flat cables and all the USB connected wire are normal.
b To check the voltage of the the first pin from the left(power supply pin) of the USB connector, should be +5V.
e When the USB-DET is on working mode the votalge should be 2V or above, if on working, the voltage is 0.
e The control output lever of the 9th and 10th Pin of IC406 4052 should be normal. the 9th and 10th Pin should at the low
lever when the AUX output is normal.
5
a To check whether the SOURCE is switch to MP3-LINK mode.
b To check the intensity and amplitude of AUX input signal.
d To check whether the connected wire which was on the android connected board is broken, whether the output is +5V,
and whether the charging status of the mobilephone is normal.
c Whether the CON801 is inserted in place and no loose.
b Whether the Carstudio software in the mobilephone have been installed or have start up after install, whether the
bluetooth in the memu have been connected.
7
d To check whether the C0N702 connector ( buit-out MIC) is connect well.
e Change the BT modul to test.
c To check whether the data communication of the bluetooth board TX RX MUTE is normal, whether the voltage is
normal (5V is normal).
a To check whether the bluetooth mobilephone have paired with the uint or only have paired but not connected.
Connect
android
system
but
doesn't
work
28