Philips CMD310, Руководство по обслуживанию

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Tate 2012-1-12
NO、
3
No audio
output
4 Radio
abnormal
d、 To check the oscillation frequence of crystal XT001 of the tuner module,should be 32、7，8MHz、
b、 To check whether the unit is at MUTE mode, press SOURCE button and check whether it is effective of the input sound
source、
b、 To check whether the strength of then input signal of the tuner is too weak、
c、To check the 2 pin voltage of the IC401 should be +3 V3、
a、 To check the antenna of the AM/FM tuner、
e、 To check the voltage of 22 pin(MUTE) of power amplifier IC501(7388 IC) , normally should be +3V2、
d 、 To check the circuit of power amplifier IC501(7388 IC) and VOLUME IC402(7313 IC)、
c、 To check whether the connection of 8 PIN audio output wire of ISO connector is correct; wrong connection or short circuit
to the ground will caused the protection of the power amplifier( no voltage output)、
b、To check the connectors of the CON901 CON202 whether the socket of it is loose、
a、 To check whether the ISO301(1，pin) connector of the tail of the unit is connect well , Whether it is loose of the 15A fuse of
the yellow wire, or insert non in place、
e、 To check the oscillation frequence of crystal CF201 shuold be 32、7，8KHZ、
a、To check the Panel PCB on the LCD driver IC (IC901) of the 5， pin power supply is normal, should be +5 V0、
Area All area
d、 To check each voltage regulator IC's output voltage is normal, IC303, 304 should be +9 V0 voltage output, IC302 should
+3 V3 voltage outputs, IC，05 should be +1 V2 voltage output、
1
LCD
Display
abnormal
2
Trouble shooting Trouble shooting Trouble shooting Trouble shooting
failure
phenomena
failure cause remark
Product Model CMD310
c、 To check the 5 pin voltage of the IC201(MCU) should be +5V0、
b、To check whether the LCD Panel iron bracket for loose、
NO Power
a、 To check whether the volume knob is turn to the minimum position、
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