Denon DVD-2910 Service Manual page 22

(2) SACD
Check PCM Digital Audio Data (VSTEM data)
and VSTEM communication.
GU-3612 (MAIN UNIT)
• [IC601] output and [IC602] input:
[SD0-7], [SDCK], [XSAK], [SDEF], [XSHD2],
[XSRQ]
O.K.
Check DSD Data. [1]
GU-3612 (MAIN UNIT)
• [IC602] output:
[DSARS], [DSALS], [DSASW], [DSAC], [DSAR],
[DSAL], [DSDMIXL], [DSDMIXR], [BCKAO]
O.K.
Check DSD Data. [2]
GU-3612 ( MAIN UNIT)
(1) Audio selector (SN74LVC157) output
/Audio DSP input:
• [DSR_IN], [DSL_I], [DSW_IN], [DC_I], [DFR_IN],
[DFL_I], [DML_I], [DMR_I], [DBCK]
(2) [IC304, IC305, IC306] : 1pin (DSD_SEL) "H"?
O.K.
Check Audio DSP [IC311] (ADSP-21266)
GU-3612 (MAIN UNIT)
(1) Power Supply Voltages.
+3.3V_DSP, DSP1.8V
(2) Clock waveform.
142pin : 18.75MHz O.K.?
(3) Reset signal.
[DSPRST] (121pin) : "H"?
(4) Control signal
[DSPSPICS] (122pin), [DSPSPICLK] (125pin),
[DSPMISO] (126pin), [DSPMOSI] (127pin)
[FLAG0](15pin)
O.K.
Check DSD Data. [3]
GU-3612 (MAIN UNIT)
Audio DSP (ADSP-21266) output:
• [DFL_O], [DSL_O], [DC_O], [DFR_OUT]
O.K.
Check DSD Data. [4]
GU-3612 (MAIN UNIT)
• [CX271] :
[DSL_O], [DSR_OUT], [FRONT_O], [DFR_OUT],
[DC_O], [DSW_OUT], [DML_I], [DMR_O] ,[DBCK]
O.K.
Continue to the check process of
GU-3616-1 AUDIO UNIT.
Check Soldering.
N.G.
• [IC601] : 35-37, 44-48, 54, 63, 67-69pin
• [IC602] : 164-176pin
• R606-R613
Check Soldering.
N.G.
• [IC602] : 76, 74, 71, 69, 66, 64, 60, 56, 55pin
• R671-R679
• Check the circumference soldering of
[IC304], [IC305] and [IC306].
N.G.
• Check Soldering.
[IC311] : 64, 88, 56, 89, 53, 94
R385, R391, R371, R390, R372, R389.
(1) Check the circumference soldering of
[TR301], [TR302] and [IC312].
(2) Check the circumference soldering of
N.G.
[X301].
(3) Check Soldering.
[IC318] : 55pin, R411
(4) Check Soldering.
[IC318] : 1, 100, 98, 99, 58pin, R460
N.G.
(1) Check Soldering.
[IC311] : 80-82, 86, 57, R394-R396, R370
• Check Soldering.
[CX271] : 7-12, 14, 16, 18, 19
R493-R502
(2) SACD
SACD デジタルオーディオデータ /VSTEM
通信確認
GU-3612 (MAIN UNIT)
･ [IC601] 出力 / [IC602] 入力 :
[SD0-7], [SDCK], [XSAK], [SDEF], [XSHD2],
[XSRQ]
O.K.
DSD データ確認 [1]
GU-3612(MAIN UNIT)
･ [IC602] 出力 :
[DSARS], [DSALS], [DSASW], [DSAC], [DSAR],
[DSAL], [DSDMIXL], [DSDMIXR], [BCKAO]
O.K.
DSD データ確認 [2]
GU-3612 (MAIN UNIT)
(1) オーディオセレクタ (SN74LVC157) 出力
/ オーディオ DSP 入力
･ [DSR_IN], [DSL_I], [DSW_IN], [DC_I],
[DFR_IN], [DFL_I], [DML_I], [DMR_I], [DBCK]
(2) [IC304, IC305, IC306] : 1pin(DSD_SEL) "H"?
O.K.
オーディオDSPの確認 [IC311] (ADSP-21266)
GU-3612 (MAIN UNIT)
(1) 電源電圧
+3.3V_DSP, DSP1.8V
(2) クロック波形
142pin : 18.75MHz O.K.?
(3) RESET 信号
[DSPRST] (121pin) : "H"?
(4) 制御信号
[DSPSPICS] (122pin), [DSPSPICLK] (125pin) ,
[DSPMISO] (126pin), [DSPMOSI] (127pin)
[FLAG0] (15pin)
O.K.
DSD データ確認 [3]
GU-3612 (MAIN UNIT)
オーディオ DSP (ADSP-21266) 出力 :
･ [DFL_O], [DSL_O],[DC_O], [DFR_OUT]
O.K.
DSD データ確認 [4]
GU-3612(MAIN UNIT)
･ [CX271] :
[DSL_O], [DSR_OUT], [FRONT_O],
[DFR_OUT], [DC_O], [DSW_OUT], [DML_I],
[DMR_O], [DBCK]
O.K.
GU-3616-1 AUDIO UNIT のチェック工程へ
22
DVD-2910/955
半田付けを確認
N.G.
･ [IC601] : 35-37, 44-48, 54, 63, 67-69pin
･ [IC602] : 164-176pin
･ R606-R613
半田付けを確認
N.G.
･ [IC602] : 76, 74, 71, 69, 66, 64, 60, 56, 55pin
･ R671-R679
･ [IC304]-[IC306] とその周辺回路の半田付けを確認
N.G.
･ 半田付けを確認
[IC311] : 64, 88, 56, 89, 53, 94
･ R385, R391, R371, R390, R372, R389.
(1) [TR301], [TR302], [IC312] とその周辺回路の
半田付けを確認
(2) [X301] とその周辺回路の半田付けを確認
N.G.
(3) 半田付けを確認
[IC318] : 55pin, R411
(4) 半田付けを確認
[IC318] : 1, 100, 98, 99, 58pin, R460.
N.G.
･ 半田付けを確認
[IC311] : 80-82, 86, 57, R394-R396, R370
･ 半田付けを確認
[CX271] : 7-12, 14, 16, 18, 19
R493-R502