Denon DVD-2910 Service Manual page 24

3. GU-3615-1 VIDEO UNIT
(1) Progressive output [Y,Pb,Pr] does not outputed.
Check Power Supply Voltages.
GU-3615-1(VIDEO UNIT)
• +3.3V_D3, +5V_V1, +2.5V_V1, +1.8V_V1
O.K.
Check Digital signal for Video [1].
GU-3615-1 (VIDEO UNIT)
• [IC718](FLI2310)input:
[PC2-9], [HSYNC], [VSYNC], [CLK0]
O.K.
Check oscillation waveform.
GU-3615-1 (VIDEO UNIT)
• [IC718] : [XTAL_IN]191pin
13.5MHz (3.3V) O.K.?
O.K.
Check control signal for [IC718] and [IC701].
GU-3615-1(VIDEO UNIT)
• [SDA],[SCK],[RST_V]
O.K.
Check Digital signal for Video [2].
GU-3615-1 (VIDEO UNIT)
• [IC718]output / [IC701] (ADV7310) input:
[YO0-9], [CO0-9], [P_HSYNC], [P_VSYNC]
[CLK_P/I], [PS_CLK]
O.K.
Check Video Encoder [1] circuit.
GU-3615-1 (VIDEO UNIT)
• [IC701] :
O.K.
Check Video Buffer circuit.
GU-3615-1 (VIDEO UNIT)
• [TR701-TR703] :
• [VR702-VR704]
O.K.
Check Video Driver circuit.
GU-3615-1 (VIDEO UNIT)
• [IC708] (BH7862F)]
O.K.
END
N.G.
Check Soldering.
• [CY051], [IC715], [IC716]
Check Soldering.
• [CY331] : 4-11, 13, 23, 24pin
N.G.
• RA708, RA709, R794
• [IC718] : 195, 196, 199-205, 207,208pin
• RA723 ,RA724 ,R930, R931
N.G.
Check Soldering.
• Circumference of [X731] (13.5MXTAL)
Check Soldering.
N.G.
• [CY331] : 9, 14, 15pin
• [IC718] : 45-47pin, R915-R917
• [IC701] : 21, 22, 33pin, R718, R719, R737
Check Soldering.
• [IC718] : 144-155, 126-137, 125, 118, 119pin
• R945, R947, R948
N.G.
• [IC701] : 2-13, 14-18, 23, 24, 26-30, 32pin
• RA701-RA704, RA707, R723, R729
• Circumference of [IC702]
(SN74LVC157APW)
N.G. Check the soldering [IC701]and circumfer-
ence soldering of [IC701].
N.G.
Check the soldering [TR701-TR703] and
circumference soldering of [TR701-TR703].
N.G.
Check the soldering [IC708] and circumfer-
ence soldering of [IC708].
3. GU-3615-1 VIDEO UNIT
(1) プログレッシブ映像 [Y,Pb,Pr] 出力せず
電源電圧確認
GU-3615-1 (VIDEO UNIT)
･ +3.3V_D3, +5V_V1, +2.5V_V1, +1.8V_V1
O.K.
映像用デジタル信号の確認 [1]
GU-3615-1 (VIDEO UNIT)
･ [IC718](FLI2310) 入力 :
[PC2-9], [HSYNC], [VSYNC], [CLK0]
O.K.
発振波形確認
GU-3615-1 (VIDEO UNIT)
･ [IC718] : [XTAL_IN] 191pin
13.5MHz (3.3V) O.K.?
O.K.
[IC718] と [IC701] 制御信号の確認
GU-3615-1 (VIDEO UNIT)
･ [SDA], [SCK], [RST_V]
O.K.
映像用デジタル信号の確認 [2]
GU-3615-1 (VIDEO UNIT)
･ [IC718] 出力 / [IC701] (ADV7310) 入力 :
[YO0-9], [CO0-9], [P_HSYNC], [P_VSYNC]
[CLK_P/I], [PS_CLK]
O.K.
ビデオエンコーダー [1] 回路の確認
GU-3615-1 (VIDEO UNIT)
･ [IC701]
O.K.
ビデオバッファー回路の確認
GU-3615-1 (VIDEO UNIT)
･ [TR701-TR703]
･ [VR702-VR704]
O.K.
ビデオドライバー回路の確認
GU-3615-1 (VIDEO UNIT)
･ [IC708] (BH7862F)
O.K.
終了
24
DVD-2910/955
N.G. 半田付けを確認
･ [CY051], [IC715], [IC716]
半田付けを確認
･ [CY331] : 4-11, 13, 23, 24pin
N.G.
･ RA708, RA709, R794
･ [IC718] : 195, 196, 199-205, 207, 208pin
･ RA723, RA724, R930, R931
N.G.
半田付けを確認
･ [X731] (13.5MXTAL) 周辺回路
半田付けを確認
N.G.
･ [CY331] : 9, 14, 15pin
･ [IC718] : 45-47pin, R915-R917
･ [IC701] : 21, 22, 33pin, R718, R719, R737
半田付けを確認
･ [IC718] : 144-155, 126-137, 125, 118, 119pin
N.G.
･ R945, R947, R948
･ [IC701] : 2-13, 14-18, 23, 24, 26-30, 32pin
･ RA701-RA704, RA707, R723, R729
･ [IC702] (SN74LVC157APW) 周辺回路
N.G.
[IC701] とその周辺回路の半田付けを確認
N.G. [TR701-TR703] とその周辺回路の半田付けを
確認
N.G.
[IC708] とその周辺回路の半田付けを確認