Dvd-5900/Dvd-A11 9 - Denon DVD-5900 Service Manual

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TROUBLE SHOOTING
1. GU-3512 MAIN PWB
1.1. FL TUBE doesn't light
(1) Check the Set-up process of Panel µ-COM
Check Power Supply Voltages.
• [IC402]:D1,D4
+3.3V_D1, +3.3V_D4
O.K.
Check Oscillation Waveform.
• [IC402]:
16MHz at 13pin.
O.K.
Check Power Supply Voltages.
• [IC402]:
"H" level at 39pin? "L" level at 7pin and
44pin?
O.K.
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L 1 3 9 4 2 2 9 6 5 1 3
Check Reset Signal.
• [IC402]:
"H" level at 10pin?
O.K.
Check Data Bus between
FLD Driver(GU-3513-2 [IC102])
• [RST]:
"H" level?
O.K.
Continue to next step.
Check the Set-up process of B/E µ-COM.
w w w
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N.G.
Check soldering.
• CY081 on AUDIO PWB.
N.G.
Check soldering.
• X401 on AUDIO PWB.
N.G.
Check soldering.
• IC402 on AUDIO PWB.
N.G.
Check soldering.
• IC401(Reset IC) on AUDIO PWB.
N.G.
(1)Check soldering of CX172.
(2)GU-3513-2 is N.G.(No Good).
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O.K.
O.K.
O.K.
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O.K.
O.K.
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N.G.
N.G.
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N.G.
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N.G.
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DVD-5900/DVD-A11 21
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