Philips CE152/10, Руководство по обслуживанию

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CE152 Date 2012-5-28
NO.
3
NO
audio
output
4
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d. To check the oscillation frequence of crystal XL130 of the tuner IC,shuold be 32.768MHz
b. To check whether the strength of then input signal of the tuner is too weak.
c. To check the voltage of the 12 pin
ǃ
13 pin of the U131 of the tuner IC, should be +3V3.
a. To check the antenna of the AM/FM tuner.
a. To check whether the volume knob is turn to the minimum position.
b. To check whether the unit is at MUTE mode, press SOURCE button and check whether it is effective of the input sound
source.
c. To check whether the connection of 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).
e. To check the voltage of 22 PIN(MUTE) of power amplifier U501(7388 IC) , normally should be +4V0.
d . To check the circuit of power amplifier U501(7388 IC) and VOLUME U301(7313 IC).
a. To check whether the CN501(ISO) connector of the tail of the unit is connect well , Whether it is loose of the 15A fuse of the
ISO, or insert non in place.
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failure
phenomena
failure cause remark
Product Model
$UHD $UHD $UHD $UHD $OODUHD
NO Power 1
b. To check whether there is any contamination and bad contact on the 22Pin male/female connector on the panel and main
board.
e. To check the oscillation frequence of crystal CF202 shuold be 32.768KHz .
d. At the unit ACC ON, To check the 36 pin voltage of the U201(MCU) should be low level .
c. To check the U602 of voltage regulator IC,the output pin should be +3V3
ǃ
the input pin should be +11V0.
LCD
abnormal
2
a.To check whether there is any contamination and bad contact on the 22Pin 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.
c.To check the voltage of the L303 of the MAIN board,should be +5V0.
b.To Check the voltage of the 56 pin of the IC901(75823) ,should be +5V0.
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