27
27
DVD-2900
(3) DVD-VIDEO / AUDIO
2. GU-3495 AUDIO P.W.B.
2.1. No sound or Noise generated at audio output terminal.
(1) Check Audio Output terminal, then Input pin of ICs.
(2) Check MUTE Circuit and Transistors.
2.2. Does not output Digital output signal(DOUT).
O.K.
Check DVD digital data output.
• [IC101]: [DATA(1--3)], [LRCK], [BCK]
N.G.
Check soldering
• [IC101]: 159--170pin check.
• [IC201]: 46--71pin check.
Check Bus-manager output.
• [IC201]: [MELD(0--2)], [MELWS],
[MELBCK]
Check audio select output.
[DAD0-2)], [DAWS], [DABCK], [MCLK]
Continues to the Check process of GU-3495 AUDIO P.W.B..
(1)Check power supply voltage.
• [IC201]: +3.3V_D1, +2.5V_D1
(2)Check clock oscillation.
• [IC201]: (X103) 12.288MHz O.K.?
(3)Check control signal
• [IC201]: [DSPRST
], [HDIN], [HDOUT], [HCLK],
[INTRPT], [HCS] O.K.?
(4)Check communication.
• [IC201]--[IC202](P-ROM)
(5)Check soldering.
• [IC203]
N.G.
O.K.
O.K.
N.G.
Check soldering
• [IC204]--[IC207]
• [CX271]
• FL, FR IC206 Audio input check See attached sheet waveform (Page 115 ①〜④ )
CNT,SW IC209 Audio input check
• SL, SR IC212 Audio input check
• Check MUTE circuit Check Transistors
(TR217--TR220, TR211--TR226)
Check belows
[IC201], [IC202]
[T201]
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9
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2
9
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5
1
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9
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2
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9
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6
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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