Denon DVD-3930 Service Manual page 36

4. GU-3749-2 (VIDEO UNIT)/GU-3752(IP UNIT)
(1) Progressive output [Y, Pb, Pr] does not outputted.
Check Power Supply Voltages[2].
GU-3752(IP UNIT)
• +3.3V_D2, +2.5V_D3, +1.5V_D1
• VTT(+1.25V)
• VREF (+1.25V)
• MVREF1, MVREF2, MVREF3, MVREF4(1.25V)
O.K.
Check Digital signal for Video[1].
GU-3752(IP UNIT)
• I/P Convertor [IC101](SXT2LF-400)input:
[YUV0~7], [PCLK]
O.K.
Check oscillation waveform.
GU-3752(IP UNIT)
• [IC101](SXT2LF-400): [REFCLKA]
Check point: [R152]: 66.666MHz OK?
• [IC101](SXT2LF-400): [PCICLK]
Check point: [R142]: 33MHz OK?
• [IC701~704](EM6A9320BI-4MG): [ACK]
Check point: [R717]: 250MHz OK?
O.K.
Check control signal for I/P Convertor [IC101].
GU-3752(IP UNIT)
• [RESETN], [IIC0_CLK], [IIC0_DAT]
O.K.
Check Digital signal for Video[2].
GU-3749-2(VIDEO UNIT)
• [YO_0~YO_9], [CO_0~CO_9],
[P_VSYNC_1], [P_HSYNC_1],
[C_REF-1], [PS_CLK-1]
O.K.
Check Digital output for Progressive Video[3].
GU-3752(IP UNIT)
• [IC101]output:
[YO_0~YO_9], [CO_0~CO_9],
[P_VSYNC], [P_HSYNC], [C_REF-1], [H_PS_CLK]
O.K.
Check Digital output for Progressive Video[2].
GU-3749-2(VIDEO UNIT)
• Video Encoder [IC501](ADV7324)input:
[YO_0~YO_9], [CO_0~CO_9],
[P_VSYNC_1], [P_HSYNC_1], [C_REF-1],
[PS_CLK-1]
O.K.
Check Video Buffer IC circuit.
GU-3749-2(VIDEO UNIT)
• [IC505]
O.K.
END
Check Soldering.
• [CY064], [CY125]
N.G.
• Circumference of [IC803](LP2995M)
• R701~704, 707~709, 712, C741~748
• R148~151, C130, 131, 180, 181
Check Soldering.
N.G.
• [CY122]
• [R440~448]
Check Soldering.
• Circumference of [X101](66.666MXTAL)
N.G.
• Circumference of [IC101]
• Circumference of [IC701~704]
Check Soldering.
N.G.
• [CY125]
• Circumference of [IC103](TC7W241FU)
Check Soldering.
N.G.
• Circumference of [CY123,CY162]
Check Soldering.
• Circumference of [IC101]
N.G.
• [R113~116, 117, 118, 120, 269, 449~456, 459~464,
468, 469]
• CX162, CX123
Check Soldering.
N.G.
• [CY123, CY162]
• Circumference of [IC501]
Check the soldering [IC505]
N.G.
and circumference soldering [IC505]
4. GU-3749-2 (VIDEO UNIT)/GU-3752(IP UNIT)
(1) プログレッシブ映像 [Y, Pb, Pr] 出力せず
電源電圧確認 [2]
GU-3752(IP UNIT)
･ +3.3V_D2, +2.5V_D3, +1.5V_D1
･ VTT(+1.25V)
･ VREF (+1.25V)
･ MVREF1, MVREF2, MVREF3, MVREF4(1.25V)
O.K.
映像用デジタル信号の確認 [1]
GU-3752(IP UNIT)
･ I/P Convertor [IC101](SXT2LF-400)input:
[YUV0 ∼ 7], [PCLK]
O.K.
発振波形確認
GU-3752(IP UNIT)
･ [IC101](SXT2LF-400): [REFCLKA]
Check point: [R152]: 66.666MHz OK?
･ [IC101](SXT2LF-400): [PCICLK]
Check point: [R142]: 33MHz OK?
･ [IC701 ∼ 704](EM6A9320BI-4MG): [ACK]
Check point: [R717]: 250MHz OK?
O.K.
I/P ｺﾝﾊﾞｰﾀ [IC101] 制御信号の確認
GU-3752(IP UNIT)
･ [RESETN], [IIC0_CLK], [IIC0_DAT]
O.K.
映像用デジタル信号の確認 [2]
GU-3749-2(VIDEO UNIT)
･ [YO_0 ∼ YO_9], [CO_0 ∼ CO_9],
[P_VSYNC_1], [P_HSYNC_1],
[C_REF-1], [PS_CLK-1]
O.K.
プログレッシブ映像用デジタル信号の確認 [3]
GU-3752(IP UNIT)
･ [IC101]output:
[YO_0 ∼ YO_9], [CO_0 ∼ CO_9],
[P_VSYNC], [P_HSYNC], [C_REF-1], [H_PS_CLK]
O.K.
プログレッシブ映像用デジタル信号の確認 [2]
GU-3749-2(VIDEO UNIT)
･ Video Encoder [IC501](ADV7324)input:
[YO_0 ∼ YO_9], [CO_0 ∼ CO_9],
[P_VSYNC_1], [P_HSYNC_1], [C_REF-1], [PS_CLK-1]
O.K.
ビデオバッファー IC 回路の確認
GU-3749-2(VIDEO UNIT)
･ [IC505]
O.K.
終了
36
DVD-3930/3930CI
半田付けを確認
･ [CY064], [CY125]
N.G.
･ [IC803](LP2995M) 周辺回路
･ R701 ∼ 704, 707 ∼ 709, 712, C741 ∼ 748
･ R148 ∼ 151, C130, 131, 180, 181
半田付けを確認
N.G.
･ [CY122]
･ [R440 ∼ 448]
半田付けを確認
･ [X101](66.666MXTAL) 周辺回路
N.G.
･ [IC101] 周辺回路
･ [IC701 ∼ 704] 周辺回路
半田付けを確認
N.G.
･ [CY125]
･ [IC103](TC7W241FU) 周辺回路
半田付けを確認
N.G.
･ [CY123, CY162]
半田付けを確認
･ [IC101] 周辺回路
N.G.
･ [R113 ∼ 116, 117, 118, 120, 269, 449 ∼ 456,
459 ∼ 464, 468, 469]
･ CX162, CX123
半田付けを確認
N.G.
･ [CY123, CY162]
･ [IC501] 周辺回路
N.G.
[IC505] とその周辺回路の半田付けを確認