94
TROUBLESHOOTING
Is+5V obtained at IC220 #9,
#35, #44?
Is+3.3V obtained at IC200
VDD_3.3?
Is+2.5V obtained at the IC220
VDD_2.5?
Check power circuit.
YES
YES
YES
NO
Is there ‘L’ at IC220 #10?
YES
YES
Check IC601 and Data
ports.
NO
Is there normal 12MHz oscillation
signal at IC220 #20, #21?
Check X220 and replace
inferior device.
NO
Are there clocks at IC200
#10(LRCLK), #11(BCLK),
#20(MCLK) and PCM Datum at
IC200 #6(PCMO), #7(PCM1),
#8(PCM2), #9(PCM3)?
YES
The volume is not operating
Check DVD Board
YES
Check IC220 and replace inferior
device.
NO
All manuals and user guides at all-guides.com
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Summary of Contents for DR-C912B
Page 13: ...11 INSTRUMENT DISASSEMBLY All manuals and user guides at all guides com...
Page 39: ...37 EXPLODED VIEW 6 3 EXPLODED VIEW OF FL ASS Y All manuals and user guides at all guides com...
Page 44: ...42 WAVEFORMS VIDEO WAVEFORMS 480 4 6 20 34 All manuals and user guides at all guides com...
Page 114: ...NORMAL AUDIO BLOCK DIAGRAM 112 BLOCK DIAGRAM All manuals and user guides at all guides com...
Page 117: ...AMP BLOCK DIAGRAM 115 BLOCK DIAGRAM All manuals and user guides at all guides com...
