Daewoo DR-C912B, Service Manual

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96
TROUBLESHOOTING
Is +12V obtained at RF102 #3?
When tunning play are there
normal PLL control signals at
IC220 #3~#6?
When tuned, is there ‘L’ at
RF102 #1, #2?
Check power circuit.
Check RF102 and replace
inferior device.
YES
YES
YES
NO
NO
NO
When tuned, is there audio
signals at RF102 #4, #6?
Check IC220 and
communication withe IC601.
YES
YES
Check power circuit.
NO Are there Voltage at ICD01
#18(5V) #9(3.3V), #21(5V)?
Check signal flow circuit.
NO
Are there normal audio signals
at ICD01 #16~#17, #19~20?
YES
No sound in the Radio MODE.
Check DVD Board.
NO
Are there clock at ICD01,
#5(BCLK), #6(LRCLK),
#10(MCLK)?
YES
Check IC220
NO
Are CLK and DATA obtained
at ICD01 #11, #12?
YES
Check IC01 and replace
inferior device.
NO
Is there normal PCM DATA at
ICD01 #4?
YES
Check signal flow circuit.
YES
NO